diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
index eef3e430809..c904a9e8f5f 100644
--- a/src/compiler/emitter.ts
+++ b/src/compiler/emitter.ts
@@ -1930,6 +1930,7 @@ module ts {
 
             function emitTrailingDeclarationComments(node: Declaration) {
                 var trailingComments = getTrailingComments(currentSourceFile.text, node.end);
+                emitComments(trailingComments, writer, writeComment);
             }
 
             if (compilerOptions.sourceMap) {
diff --git a/tests/baselines/reference/AmbientModuleAndAmbientWithSameNameAndCommonRoot.js b/tests/baselines/reference/AmbientModuleAndAmbientWithSameNameAndCommonRoot.js
index 461b844eab1..d5576c0e124 100644
--- a/tests/baselines/reference/AmbientModuleAndAmbientWithSameNameAndCommonRoot.js
+++ b/tests/baselines/reference/AmbientModuleAndAmbientWithSameNameAndCommonRoot.js
@@ -28,4 +28,4 @@ var p = new A.Point(0, 0); // unexpected error here, bug 840000
 //// [test.js]
 var p;
 var p = A.Point.Origin;
-var p = new A.Point(0, 0);
+var p = new A.Point(0, 0);// unexpected error here, bug 840000 
diff --git a/tests/baselines/reference/AmbientModuleAndNonAmbientClassWithSameNameAndCommonRoot.js b/tests/baselines/reference/AmbientModuleAndNonAmbientClassWithSameNameAndCommonRoot.js
index b067168a387..d0221e8620d 100644
--- a/tests/baselines/reference/AmbientModuleAndNonAmbientClassWithSameNameAndCommonRoot.js
+++ b/tests/baselines/reference/AmbientModuleAndNonAmbientClassWithSameNameAndCommonRoot.js
@@ -37,4 +37,4 @@ var A;
 //// [test.js]
 var p;
 var p = A.Point.Origin;
-var p = new A.Point(0, 0);
+var p = new A.Point(0, 0);// unexpected error here, bug 840000 
diff --git a/tests/baselines/reference/ClassAndModuleThatMergeWithStaticFunctionAndExportedFunctionThatShareAName.js b/tests/baselines/reference/ClassAndModuleThatMergeWithStaticFunctionAndExportedFunctionThatShareAName.js
index b9386b28f9b..f4ea22c90a3 100644
--- a/tests/baselines/reference/ClassAndModuleThatMergeWithStaticFunctionAndExportedFunctionThatShareAName.js
+++ b/tests/baselines/reference/ClassAndModuleThatMergeWithStaticFunctionAndExportedFunctionThatShareAName.js
@@ -30,7 +30,7 @@ var Point = (function () {
     }
     Point.Origin = function () {
         return { x: 0, y: 0 };
-    };
+    };// unexpected error here bug 840246 
     return Point;
 })();
 var Point;
@@ -38,7 +38,7 @@ var Point;
     function Origin() {
         return null;
     }
-    Point.Origin = Origin;
+    Point.Origin = Origin;//expected duplicate identifier error 
 })(Point || (Point = {}));
 var A;
 (function (A) {
@@ -49,7 +49,7 @@ var A;
         }
         Point.Origin = function () {
             return { x: 0, y: 0 };
-        };
+        };// unexpected error here bug 840246 
         return Point;
     })();
     A.Point = Point;
@@ -57,7 +57,7 @@ var A;
         function Origin() {
             return "";
         }
-        Point.Origin = Origin;
+        Point.Origin = Origin;//expected duplicate identifier error 
     })(A.Point || (A.Point = {}));
     var Point = A.Point;
 })(A || (A = {}));
diff --git a/tests/baselines/reference/ClassAndModuleThatMergeWithStaticFunctionAndNonExportedFunctionThatShareAName.js b/tests/baselines/reference/ClassAndModuleThatMergeWithStaticFunctionAndNonExportedFunctionThatShareAName.js
index 79e1784b4fa..638464754f9 100644
--- a/tests/baselines/reference/ClassAndModuleThatMergeWithStaticFunctionAndNonExportedFunctionThatShareAName.js
+++ b/tests/baselines/reference/ClassAndModuleThatMergeWithStaticFunctionAndNonExportedFunctionThatShareAName.js
@@ -37,7 +37,7 @@ var Point;
 (function (Point) {
     function Origin() {
         return "";
-    }
+    }// not an error, since not exported 
 })(Point || (Point = {}));
 var A;
 (function (A) {
@@ -55,7 +55,7 @@ var A;
     (function (Point) {
         function Origin() {
             return "";
-        }
+        }// not an error since not exported 
     })(A.Point || (A.Point = {}));
     var Point = A.Point;
 })(A || (A = {}));
diff --git a/tests/baselines/reference/ClassAndModuleThatMergeWithStaticVariableAndExportedVarThatShareAName.js b/tests/baselines/reference/ClassAndModuleThatMergeWithStaticVariableAndExportedVarThatShareAName.js
index 9323f83a1ec..d1db9d1693e 100644
--- a/tests/baselines/reference/ClassAndModuleThatMergeWithStaticVariableAndExportedVarThatShareAName.js
+++ b/tests/baselines/reference/ClassAndModuleThatMergeWithStaticVariableAndExportedVarThatShareAName.js
@@ -33,7 +33,7 @@ var Point = (function () {
 })();
 var Point;
 (function (Point) {
-    Point.Origin = "";
+    Point.Origin = "";//expected duplicate identifier error 
 })(Point || (Point = {}));
 var A;
 (function (A) {
@@ -47,7 +47,7 @@ var A;
     })();
     A.Point = Point;
     (function (Point) {
-        Point.Origin = "";
+        Point.Origin = "";//expected duplicate identifier error 
     })(A.Point || (A.Point = {}));
     var Point = A.Point;
 })(A || (A = {}));
diff --git a/tests/baselines/reference/ClassAndModuleThatMergeWithStaticVariableAndNonExportedVarThatShareAName.js b/tests/baselines/reference/ClassAndModuleThatMergeWithStaticVariableAndNonExportedVarThatShareAName.js
index 9864d9d4eb0..f1995d8bb43 100644
--- a/tests/baselines/reference/ClassAndModuleThatMergeWithStaticVariableAndNonExportedVarThatShareAName.js
+++ b/tests/baselines/reference/ClassAndModuleThatMergeWithStaticVariableAndNonExportedVarThatShareAName.js
@@ -33,7 +33,7 @@ var Point = (function () {
 })();
 var Point;
 (function (Point) {
-    var Origin = "";
+    var Origin = "";// not an error, since not exported 
 })(Point || (Point = {}));
 var A;
 (function (A) {
@@ -47,7 +47,7 @@ var A;
     })();
     A.Point = Point;
     (function (Point) {
-        var Origin = "";
+        var Origin = "";// not an error since not exported 
     })(A.Point || (A.Point = {}));
     var Point = A.Point;
 })(A || (A = {}));
diff --git a/tests/baselines/reference/ClassAndModuleWithSameNameAndCommonRoot.js b/tests/baselines/reference/ClassAndModuleWithSameNameAndCommonRoot.js
index 8babd703b0f..bf28318a86d 100644
--- a/tests/baselines/reference/ClassAndModuleWithSameNameAndCommonRoot.js
+++ b/tests/baselines/reference/ClassAndModuleWithSameNameAndCommonRoot.js
@@ -69,7 +69,7 @@ var X;
 //// [test.js]
 //var cl: { x: number; y: number; }
 var cl = new X.Y.Point(1, 1);
-var cl = X.Y.Point.Origin;
+var cl = X.Y.Point.Origin;// error not expected here same as bug 83996 ? 
 //// [simple.js]
 var A = (function () {
     function A() {
diff --git a/tests/baselines/reference/FunctionAndModuleWithSameNameAndCommonRoot.js b/tests/baselines/reference/FunctionAndModuleWithSameNameAndCommonRoot.js
index e0ea0bd07ce..75bc6f46b0d 100644
--- a/tests/baselines/reference/FunctionAndModuleWithSameNameAndCommonRoot.js
+++ b/tests/baselines/reference/FunctionAndModuleWithSameNameAndCommonRoot.js
@@ -64,7 +64,7 @@ var fn;
 var fn = A.Point;
 var cl;
 var cl = A.Point();
-var cl = A.Point.Origin;
+var cl = A.Point.Origin;// not expected to be an error. 
 //// [simple.js]
 var B;
 (function (B) {
@@ -78,7 +78,7 @@ var B;
     var Point = B.Point;
 })(B || (B = {}));
 var fn;
-var fn = B.Point;
+var fn = B.Point;// not expected to be an error. bug 840000: [corelang] Function of fundule not assignalbe as expected 
 var cl;
 var cl = B.Point();
 var cl = B.Point.Origin;
diff --git a/tests/baselines/reference/InvalidNonInstantiatedModule.js b/tests/baselines/reference/InvalidNonInstantiatedModule.js
index 0f6c7fe62cb..bce72366f89 100644
--- a/tests/baselines/reference/InvalidNonInstantiatedModule.js
+++ b/tests/baselines/reference/InvalidNonInstantiatedModule.js
@@ -9,5 +9,5 @@ var x: typeof M; // Error only a namespace
 
 
 //// [InvalidNonInstantiatedModule.js]
-var m = M;
-var x;
+var m = M;// Error, not instantiated can not be used as var 
+var x;// Error only a namespace 
diff --git a/tests/baselines/reference/ModuleWithExportedAndNonExportedFunctions.js b/tests/baselines/reference/ModuleWithExportedAndNonExportedFunctions.js
index d7e5eed0dfb..f96003342e1 100644
--- a/tests/baselines/reference/ModuleWithExportedAndNonExportedFunctions.js
+++ b/tests/baselines/reference/ModuleWithExportedAndNonExportedFunctions.js
@@ -51,7 +51,7 @@ var A;
 var fn;
 var fn = A.fn;
 var fng;
-var fng = A.fng;
+var fng = A.fng;// bug 838015 
 // these should be errors since the functions are not exported
 var fn2 = A.fn2;
 var fng2 = A.fng2;
diff --git a/tests/baselines/reference/ParameterList7.js b/tests/baselines/reference/ParameterList7.js
index 725baa0740e..96a7f28cd14 100644
--- a/tests/baselines/reference/ParameterList7.js
+++ b/tests/baselines/reference/ParameterList7.js
@@ -9,6 +9,6 @@ class C1 {
 var C1 = (function () {
     function C1(p3) {
         this.p3 = p3;
-    }
+    }// OK 
     return C1;
 })();
diff --git a/tests/baselines/reference/additionOperatorWithInvalidOperands.js b/tests/baselines/reference/additionOperatorWithInvalidOperands.js
index 85baac8f9ca..82683158228 100644
--- a/tests/baselines/reference/additionOperatorWithInvalidOperands.js
+++ b/tests/baselines/reference/additionOperatorWithInvalidOperands.js
@@ -70,7 +70,7 @@ var r2 = a + b;
 var r3 = a + c;
 // number + every type except any and string
 var r4 = b + a;
-var r5 = b + b;
+var r5 = b + b;// number + number is valid 
 var r6 = b + c;
 // object + every type except any and string
 var r7 = c + a;
diff --git a/tests/baselines/reference/additionOperatorWithTypeParameter.js b/tests/baselines/reference/additionOperatorWithTypeParameter.js
index 6405bf897b9..bd2a1cf8462 100644
--- a/tests/baselines/reference/additionOperatorWithTypeParameter.js
+++ b/tests/baselines/reference/additionOperatorWithTypeParameter.js
@@ -54,18 +54,18 @@ function foo(t, u) {
     var g;
     var f;
     // type parameter as left operand
-    var r1 = t + a;
+    var r1 = t + a;// ok, one operand is any 
     var r2 = t + b;
     var r3 = t + c;
-    var r4 = t + d;
+    var r4 = t + d;// ok, one operand is string 
     var r5 = t + e;
     var r6 = t + g;
     var r7 = t + f;
     // type parameter as right operand
-    var r8 = a + t;
+    var r8 = a + t;// ok, one operand is any 
     var r9 = b + t;
     var r10 = c + t;
-    var r11 = d + t;
+    var r11 = d + t;// ok, one operand is string 
     var r12 = e + t;
     var r13 = g + t;
     var r14 = f + t;
diff --git a/tests/baselines/reference/aliasBug.js b/tests/baselines/reference/aliasBug.js
index a8320d2ec9d..50e22a989d5 100644
--- a/tests/baselines/reference/aliasBug.js
+++ b/tests/baselines/reference/aliasBug.js
@@ -46,7 +46,7 @@ var provide = foo;
 var booz = foo.bar.baz;
 var p = new provide.Provide();
 function use() {
-    var p1;
+    var p1;// error here, but should be okay 
     var p2;
     var p3;
     var p22 = new provide.Provide();
diff --git a/tests/baselines/reference/aliasOnMergedModuleInterface.js b/tests/baselines/reference/aliasOnMergedModuleInterface.js
index 73f0b3de6ce..3a1d079748e 100644
--- a/tests/baselines/reference/aliasOnMergedModuleInterface.js
+++ b/tests/baselines/reference/aliasOnMergedModuleInterface.js
@@ -25,4 +25,4 @@ var x: foo.A = foo.bar("hello"); // foo.A should be ok but foo.bar should be err
 //// [aliasOnMergedModuleInterface_1.js]
 var z;
 z.bar("hello");
-var x = foo.bar("hello");
+var x = foo.bar("hello");// foo.A should be ok but foo.bar should be error 
diff --git a/tests/baselines/reference/ambiguousOverloadResolution.js b/tests/baselines/reference/ambiguousOverloadResolution.js
index 966c9f14628..1a59b83fcaf 100644
--- a/tests/baselines/reference/ambiguousOverloadResolution.js
+++ b/tests/baselines/reference/ambiguousOverloadResolution.js
@@ -28,4 +28,4 @@ var B = (function (_super) {
     return B;
 })(A);
 var x;
-var t = f(x, x);
+var t = f(x, x);// Not an error 
diff --git a/tests/baselines/reference/anyAsConstructor.js b/tests/baselines/reference/anyAsConstructor.js
index 409a86dcc9b..9e695136f41 100644
--- a/tests/baselines/reference/anyAsConstructor.js
+++ b/tests/baselines/reference/anyAsConstructor.js
@@ -18,4 +18,4 @@ var a = new x();
 var b = new x('hello');
 var c = new x(x);
 // grammar allows this for constructors
-var d = new x(x);
+var d = new x(x);// no error 
diff --git a/tests/baselines/reference/anyAssignabilityInInheritance.js b/tests/baselines/reference/anyAssignabilityInInheritance.js
index 261768e2981..467d7c2c9d3 100644
--- a/tests/baselines/reference/anyAssignabilityInInheritance.js
+++ b/tests/baselines/reference/anyAssignabilityInInheritance.js
@@ -90,40 +90,40 @@ var r3 = foo3(a); // any
 
 //// [anyAssignabilityInInheritance.js]
 var a;
-var r3 = foo2(a);
-var r3 = foo3(a);
-var r3 = foo3(a);
-var r3 = foo3(a);
-var r3 = foo3(a);
-var r3 = foo3(a);
-var r3 = foo3(a);
-var r3 = foo3(a);
+var r3 = foo2(a);// any, not a subtype of number so it skips that overload, is a subtype of itself so it picks second (if truly ambiguous it would pick first overload) 
+var r3 = foo3(a);// any 
+var r3 = foo3(a);// any 
+var r3 = foo3(a);// any 
+var r3 = foo3(a);// any 
+var r3 = foo3(a);// any 
+var r3 = foo3(a);// any 
+var r3 = foo3(a);// any 
 var A = (function () {
     function A() {
     }
     return A;
 })();
-var r3 = foo3(a);
+var r3 = foo3(a);// any 
 var A2 = (function () {
     function A2() {
     }
     return A2;
 })();
-var r3 = foo3(a);
-var r3 = foo3(a);
-var r3 = foo3(a);
+var r3 = foo3(a);// any 
+var r3 = foo3(a);// any 
+var r3 = foo3(a);// any 
 var E;
 (function (E) {
     E[E["A"] = 0] = "A";
 })(E || (E = {}));
-var r3 = foo3(a);
+var r3 = foo3(a);// any 
 function f() {
 }
 var f;
 (function (f) {
     f.bar = 1;
 })(f || (f = {}));
-var r3 = foo3(a);
+var r3 = foo3(a);// any 
 var CC = (function () {
     function CC() {
     }
@@ -133,6 +133,6 @@ var CC;
 (function (CC) {
     CC.bar = 1;
 })(CC || (CC = {}));
-var r3 = foo3(a);
-var r3 = foo3(a);
-var r3 = foo3(a);
+var r3 = foo3(a);// any 
+var r3 = foo3(a);// any 
+var r3 = foo3(a);// any 
diff --git a/tests/baselines/reference/arithmeticOperatorWithInvalidOperands.js b/tests/baselines/reference/arithmeticOperatorWithInvalidOperands.js
index 26cbf5ffac3..b0f8fce1d26 100644
--- a/tests/baselines/reference/arithmeticOperatorWithInvalidOperands.js
+++ b/tests/baselines/reference/arithmeticOperatorWithInvalidOperands.js
@@ -598,9 +598,9 @@ var e;
 var f;
 // All of the below should be an error unless otherwise noted
 // operator *
-var r1a1 = a * a;
+var r1a1 = a * a;//ok 
 var r1a2 = a * b;
-var r1a3 = a * c;
+var r1a3 = a * c;//ok 
 var r1a4 = a * d;
 var r1a5 = a * e;
 var r1a6 = a * f;
@@ -610,9 +610,9 @@ var r1b3 = b * c;
 var r1b4 = b * d;
 var r1b5 = b * e;
 var r1b6 = b * f;
-var r1c1 = c * a;
+var r1c1 = c * a;//ok 
 var r1c2 = c * b;
-var r1c3 = c * c;
+var r1c3 = c * c;//ok 
 var r1c4 = c * d;
 var r1c5 = c * e;
 var r1c6 = c * f;
@@ -634,22 +634,22 @@ var r1f3 = f * c;
 var r1f4 = f * d;
 var r1f5 = f * e;
 var r1f6 = f * f;
-var r1g1 = 0 /* a */ * a;
+var r1g1 = 0 /* a */ * a;//ok 
 var r1g2 = 0 /* a */ * b;
-var r1g3 = 0 /* a */ * c;
+var r1g3 = 0 /* a */ * c;//ok 
 var r1g4 = 0 /* a */ * d;
 var r1g5 = 0 /* a */ * e;
 var r1g6 = 0 /* a */ * f;
-var r1h1 = a * 1 /* b */;
+var r1h1 = a * 1 /* b */;//ok 
 var r1h2 = b * 1 /* b */;
-var r1h3 = c * 1 /* b */;
+var r1h3 = c * 1 /* b */;//ok 
 var r1h4 = d * 1 /* b */;
 var r1h5 = e * 1 /* b */;
 var r1h6 = f * 1 /* b */;
 // operator /
-var r2a1 = a / a;
+var r2a1 = a / a;//ok 
 var r2a2 = a / b;
-var r2a3 = a / c;
+var r2a3 = a / c;//ok 
 var r2a4 = a / d;
 var r2a5 = a / e;
 var r2a6 = a / f;
@@ -659,9 +659,9 @@ var r2b3 = b / c;
 var r2b4 = b / d;
 var r2b5 = b / e;
 var r2b6 = b / f;
-var r2c1 = c / a;
+var r2c1 = c / a;//ok 
 var r2c2 = c / b;
-var r2c3 = c / c;
+var r2c3 = c / c;//ok 
 var r2c4 = c / d;
 var r2c5 = c / e;
 var r2c6 = c / f;
@@ -683,22 +683,22 @@ var r2f3 = f / c;
 var r2f4 = f / d;
 var r2f5 = f / e;
 var r2f6 = f / f;
-var r2g1 = 0 /* a */ / a;
+var r2g1 = 0 /* a */ / a;//ok 
 var r2g2 = 0 /* a */ / b;
-var r2g3 = 0 /* a */ / c;
+var r2g3 = 0 /* a */ / c;//ok 
 var r2g4 = 0 /* a */ / d;
 var r2g5 = 0 /* a */ / e;
 var r2g6 = 0 /* a */ / f;
-var r2h1 = a / 1 /* b */;
+var r2h1 = a / 1 /* b */;//ok 
 var r2h2 = b / 1 /* b */;
-var r2h3 = c / 1 /* b */;
+var r2h3 = c / 1 /* b */;//ok 
 var r2h4 = d / 1 /* b */;
 var r2h5 = e / 1 /* b */;
 var r2h6 = f / 1 /* b */;
 // operator %
-var r3a1 = a % a;
+var r3a1 = a % a;//ok 
 var r3a2 = a % b;
-var r3a3 = a % c;
+var r3a3 = a % c;//ok 
 var r3a4 = a % d;
 var r3a5 = a % e;
 var r3a6 = a % f;
@@ -708,9 +708,9 @@ var r3b3 = b % c;
 var r3b4 = b % d;
 var r3b5 = b % e;
 var r3b6 = b % f;
-var r3c1 = c % a;
+var r3c1 = c % a;//ok 
 var r3c2 = c % b;
-var r3c3 = c % c;
+var r3c3 = c % c;//ok 
 var r3c4 = c % d;
 var r3c5 = c % e;
 var r3c6 = c % f;
@@ -732,22 +732,22 @@ var r3f3 = f % c;
 var r3f4 = f % d;
 var r3f5 = f % e;
 var r3f6 = f % f;
-var r3g1 = 0 /* a */ % a;
+var r3g1 = 0 /* a */ % a;//ok 
 var r3g2 = 0 /* a */ % b;
-var r3g3 = 0 /* a */ % c;
+var r3g3 = 0 /* a */ % c;//ok 
 var r3g4 = 0 /* a */ % d;
 var r3g5 = 0 /* a */ % e;
 var r3g6 = 0 /* a */ % f;
-var r3h1 = a % 1 /* b */;
+var r3h1 = a % 1 /* b */;//ok 
 var r3h2 = b % 1 /* b */;
-var r3h3 = c % 1 /* b */;
+var r3h3 = c % 1 /* b */;//ok 
 var r3h4 = d % 1 /* b */;
 var r3h5 = e % 1 /* b */;
 var r3h6 = f % 1 /* b */;
 // operator -
-var r4a1 = a - a;
+var r4a1 = a - a;//ok 
 var r4a2 = a - b;
-var r4a3 = a - c;
+var r4a3 = a - c;//ok 
 var r4a4 = a - d;
 var r4a5 = a - e;
 var r4a6 = a - f;
@@ -757,9 +757,9 @@ var r4b3 = b - c;
 var r4b4 = b - d;
 var r4b5 = b - e;
 var r4b6 = b - f;
-var r4c1 = c - a;
+var r4c1 = c - a;//ok 
 var r4c2 = c - b;
-var r4c3 = c - c;
+var r4c3 = c - c;//ok 
 var r4c4 = c - d;
 var r4c5 = c - e;
 var r4c6 = c - f;
@@ -781,22 +781,22 @@ var r4f3 = f - c;
 var r4f4 = f - d;
 var r4f5 = f - e;
 var r4f6 = f - f;
-var r4g1 = 0 /* a */ - a;
+var r4g1 = 0 /* a */ - a;//ok 
 var r4g2 = 0 /* a */ - b;
-var r4g3 = 0 /* a */ - c;
+var r4g3 = 0 /* a */ - c;//ok 
 var r4g4 = 0 /* a */ - d;
 var r4g5 = 0 /* a */ - e;
 var r4g6 = 0 /* a */ - f;
-var r4h1 = a - 1 /* b */;
+var r4h1 = a - 1 /* b */;//ok 
 var r4h2 = b - 1 /* b */;
-var r4h3 = c - 1 /* b */;
+var r4h3 = c - 1 /* b */;//ok 
 var r4h4 = d - 1 /* b */;
 var r4h5 = e - 1 /* b */;
 var r4h6 = f - 1 /* b */;
 // operator <<
-var r5a1 = a << a;
+var r5a1 = a << a;//ok 
 var r5a2 = a << b;
-var r5a3 = a << c;
+var r5a3 = a << c;//ok 
 var r5a4 = a << d;
 var r5a5 = a << e;
 var r5a6 = a << f;
@@ -806,9 +806,9 @@ var r5b3 = b << c;
 var r5b4 = b << d;
 var r5b5 = b << e;
 var r5b6 = b << f;
-var r5c1 = c << a;
+var r5c1 = c << a;//ok 
 var r5c2 = c << b;
-var r5c3 = c << c;
+var r5c3 = c << c;//ok 
 var r5c4 = c << d;
 var r5c5 = c << e;
 var r5c6 = c << f;
@@ -830,22 +830,22 @@ var r5f3 = f << c;
 var r5f4 = f << d;
 var r5f5 = f << e;
 var r5f6 = f << f;
-var r5g1 = 0 /* a */ << a;
+var r5g1 = 0 /* a */ << a;//ok 
 var r5g2 = 0 /* a */ << b;
-var r5g3 = 0 /* a */ << c;
+var r5g3 = 0 /* a */ << c;//ok 
 var r5g4 = 0 /* a */ << d;
 var r5g5 = 0 /* a */ << e;
 var r5g6 = 0 /* a */ << f;
-var r5h1 = a << 1 /* b */;
+var r5h1 = a << 1 /* b */;//ok 
 var r5h2 = b << 1 /* b */;
-var r5h3 = c << 1 /* b */;
+var r5h3 = c << 1 /* b */;//ok 
 var r5h4 = d << 1 /* b */;
 var r5h5 = e << 1 /* b */;
 var r5h6 = f << 1 /* b */;
 // operator >>
-var r6a1 = a >> a;
+var r6a1 = a >> a;//ok 
 var r6a2 = a >> b;
-var r6a3 = a >> c;
+var r6a3 = a >> c;//ok 
 var r6a4 = a >> d;
 var r6a5 = a >> e;
 var r6a6 = a >> f;
@@ -855,9 +855,9 @@ var r6b3 = b >> c;
 var r6b4 = b >> d;
 var r6b5 = b >> e;
 var r6b6 = b >> f;
-var r6c1 = c >> a;
+var r6c1 = c >> a;//ok 
 var r6c2 = c >> b;
-var r6c3 = c >> c;
+var r6c3 = c >> c;//ok 
 var r6c4 = c >> d;
 var r6c5 = c >> e;
 var r6c6 = c >> f;
@@ -879,22 +879,22 @@ var r6f3 = f >> c;
 var r6f4 = f >> d;
 var r6f5 = f >> e;
 var r6f6 = f >> f;
-var r6g1 = 0 /* a */ >> a;
+var r6g1 = 0 /* a */ >> a;//ok 
 var r6g2 = 0 /* a */ >> b;
-var r6g3 = 0 /* a */ >> c;
+var r6g3 = 0 /* a */ >> c;//ok 
 var r6g4 = 0 /* a */ >> d;
 var r6g5 = 0 /* a */ >> e;
 var r6g6 = 0 /* a */ >> f;
-var r6h1 = a >> 1 /* b */;
+var r6h1 = a >> 1 /* b */;//ok 
 var r6h2 = b >> 1 /* b */;
-var r6h3 = c >> 1 /* b */;
+var r6h3 = c >> 1 /* b */;//ok 
 var r6h4 = d >> 1 /* b */;
 var r6h5 = e >> 1 /* b */;
 var r6h6 = f >> 1 /* b */;
 // operator >>>
-var r7a1 = a >>> a;
+var r7a1 = a >>> a;//ok 
 var r7a2 = a >>> b;
-var r7a3 = a >>> c;
+var r7a3 = a >>> c;//ok 
 var r7a4 = a >>> d;
 var r7a5 = a >>> e;
 var r7a6 = a >>> f;
@@ -904,9 +904,9 @@ var r7b3 = b >>> c;
 var r7b4 = b >>> d;
 var r7b5 = b >>> e;
 var r7b6 = b >>> f;
-var r7c1 = c >>> a;
+var r7c1 = c >>> a;//ok 
 var r7c2 = c >>> b;
-var r7c3 = c >>> c;
+var r7c3 = c >>> c;//ok 
 var r7c4 = c >>> d;
 var r7c5 = c >>> e;
 var r7c6 = c >>> f;
@@ -928,22 +928,22 @@ var r7f3 = f >>> c;
 var r7f4 = f >>> d;
 var r7f5 = f >>> e;
 var r7f6 = f >>> f;
-var r7g1 = 0 /* a */ >>> a;
+var r7g1 = 0 /* a */ >>> a;//ok 
 var r7g2 = 0 /* a */ >>> b;
-var r7g3 = 0 /* a */ >>> c;
+var r7g3 = 0 /* a */ >>> c;//ok 
 var r7g4 = 0 /* a */ >>> d;
 var r7g5 = 0 /* a */ >>> e;
 var r7g6 = 0 /* a */ >>> f;
-var r7h1 = a >>> 1 /* b */;
+var r7h1 = a >>> 1 /* b */;//ok 
 var r7h2 = b >>> 1 /* b */;
-var r7h3 = c >>> 1 /* b */;
+var r7h3 = c >>> 1 /* b */;//ok 
 var r7h4 = d >>> 1 /* b */;
 var r7h5 = e >>> 1 /* b */;
 var r7h6 = f >>> 1 /* b */;
 // operator &
-var r8a1 = a & a;
+var r8a1 = a & a;//ok 
 var r8a2 = a & b;
-var r8a3 = a & c;
+var r8a3 = a & c;//ok 
 var r8a4 = a & d;
 var r8a5 = a & e;
 var r8a6 = a & f;
@@ -953,9 +953,9 @@ var r8b3 = b & c;
 var r8b4 = b & d;
 var r8b5 = b & e;
 var r8b6 = b & f;
-var r8c1 = c & a;
+var r8c1 = c & a;//ok 
 var r8c2 = c & b;
-var r8c3 = c & c;
+var r8c3 = c & c;//ok 
 var r8c4 = c & d;
 var r8c5 = c & e;
 var r8c6 = c & f;
@@ -977,22 +977,22 @@ var r8f3 = f & c;
 var r8f4 = f & d;
 var r8f5 = f & e;
 var r8f6 = f & f;
-var r8g1 = 0 /* a */ & a;
+var r8g1 = 0 /* a */ & a;//ok 
 var r8g2 = 0 /* a */ & b;
-var r8g3 = 0 /* a */ & c;
+var r8g3 = 0 /* a */ & c;//ok 
 var r8g4 = 0 /* a */ & d;
 var r8g5 = 0 /* a */ & e;
 var r8g6 = 0 /* a */ & f;
-var r8h1 = a & 1 /* b */;
+var r8h1 = a & 1 /* b */;//ok 
 var r8h2 = b & 1 /* b */;
-var r8h3 = c & 1 /* b */;
+var r8h3 = c & 1 /* b */;//ok 
 var r8h4 = d & 1 /* b */;
 var r8h5 = e & 1 /* b */;
 var r8h6 = f & 1 /* b */;
 // operator ^
-var r9a1 = a ^ a;
+var r9a1 = a ^ a;//ok 
 var r9a2 = a ^ b;
-var r9a3 = a ^ c;
+var r9a3 = a ^ c;//ok 
 var r9a4 = a ^ d;
 var r9a5 = a ^ e;
 var r9a6 = a ^ f;
@@ -1002,9 +1002,9 @@ var r9b3 = b ^ c;
 var r9b4 = b ^ d;
 var r9b5 = b ^ e;
 var r9b6 = b ^ f;
-var r9c1 = c ^ a;
+var r9c1 = c ^ a;//ok 
 var r9c2 = c ^ b;
-var r9c3 = c ^ c;
+var r9c3 = c ^ c;//ok 
 var r9c4 = c ^ d;
 var r9c5 = c ^ e;
 var r9c6 = c ^ f;
@@ -1026,22 +1026,22 @@ var r9f3 = f ^ c;
 var r9f4 = f ^ d;
 var r9f5 = f ^ e;
 var r9f6 = f ^ f;
-var r9g1 = 0 /* a */ ^ a;
+var r9g1 = 0 /* a */ ^ a;//ok 
 var r9g2 = 0 /* a */ ^ b;
-var r9g3 = 0 /* a */ ^ c;
+var r9g3 = 0 /* a */ ^ c;//ok 
 var r9g4 = 0 /* a */ ^ d;
 var r9g5 = 0 /* a */ ^ e;
 var r9g6 = 0 /* a */ ^ f;
-var r9h1 = a ^ 1 /* b */;
+var r9h1 = a ^ 1 /* b */;//ok 
 var r9h2 = b ^ 1 /* b */;
-var r9h3 = c ^ 1 /* b */;
+var r9h3 = c ^ 1 /* b */;//ok 
 var r9h4 = d ^ 1 /* b */;
 var r9h5 = e ^ 1 /* b */;
 var r9h6 = f ^ 1 /* b */;
 // operator |
-var r10a1 = a | a;
+var r10a1 = a | a;//ok 
 var r10a2 = a | b;
-var r10a3 = a | c;
+var r10a3 = a | c;//ok 
 var r10a4 = a | d;
 var r10a5 = a | e;
 var r10a6 = a | f;
@@ -1051,9 +1051,9 @@ var r10b3 = b | c;
 var r10b4 = b | d;
 var r10b5 = b | e;
 var r10b6 = b | f;
-var r10c1 = c | a;
+var r10c1 = c | a;//ok 
 var r10c2 = c | b;
-var r10c3 = c | c;
+var r10c3 = c | c;//ok 
 var r10c4 = c | d;
 var r10c5 = c | e;
 var r10c6 = c | f;
@@ -1075,15 +1075,15 @@ var r10f3 = f | c;
 var r10f4 = f | d;
 var r10f5 = f | e;
 var r10f6 = f | f;
-var r10g1 = 0 /* a */ | a;
+var r10g1 = 0 /* a */ | a;//ok 
 var r10g2 = 0 /* a */ | b;
-var r10g3 = 0 /* a */ | c;
+var r10g3 = 0 /* a */ | c;//ok 
 var r10g4 = 0 /* a */ | d;
 var r10g5 = 0 /* a */ | e;
 var r10g6 = 0 /* a */ | f;
-var r10h1 = a | 1 /* b */;
+var r10h1 = a | 1 /* b */;//ok 
 var r10h2 = b | 1 /* b */;
-var r10h3 = c | 1 /* b */;
+var r10h3 = c | 1 /* b */;//ok 
 var r10h4 = d | 1 /* b */;
 var r10h5 = e | 1 /* b */;
 var r10h6 = f | 1 /* b */;
diff --git a/tests/baselines/reference/arrayAssignmentTest1.js b/tests/baselines/reference/arrayAssignmentTest1.js
index 4abd6b534ff..d876f78309e 100644
--- a/tests/baselines/reference/arrayAssignmentTest1.js
+++ b/tests/baselines/reference/arrayAssignmentTest1.js
@@ -149,10 +149,10 @@ var arr_i1_2 = [];
 var arr_c1_2 = [];
 var arr_c2_2 = [];
 var arr_c3 = [];
-var i1_error = [];
-var c1_error = [];
-var c2_error = [];
-var c3_error = [];
+var i1_error = [];// should be an error - is 
+var c1_error = [];// should be an error - is 
+var c2_error = [];// should be an error - is 
+var c3_error = [];// should be an error - is 
 arr_any = arr_i1;
 arr_any = arr_c1;
 arr_any = arr_c2;
diff --git a/tests/baselines/reference/arrayAssignmentTest2.js b/tests/baselines/reference/arrayAssignmentTest2.js
index d7aef759546..2f6d610ee1a 100644
--- a/tests/baselines/reference/arrayAssignmentTest2.js
+++ b/tests/baselines/reference/arrayAssignmentTest2.js
@@ -129,7 +129,7 @@ arr_c3 = arr_i1_2;
 arr_any = f1;
 arr_any = function () {
     return null;
-};
+}// should be an error - is ;
 arr_any = o1;
 arr_any = a1;
 arr_any = c1;
diff --git a/tests/baselines/reference/arrayAssignmentTest4.js b/tests/baselines/reference/arrayAssignmentTest4.js
index 87ddf2d41b4..6a391264399 100644
--- a/tests/baselines/reference/arrayAssignmentTest4.js
+++ b/tests/baselines/reference/arrayAssignmentTest4.js
@@ -51,5 +51,5 @@ var o1 = { one: 1 };
 var arr_any = [];
 arr_any = function () {
     return null;
-};
+}// should be an error - is ;
 arr_any = c3;
diff --git a/tests/baselines/reference/arrayAugment.js b/tests/baselines/reference/arrayAugment.js
index b9023a5b15e..71663b6ffbf 100644
--- a/tests/baselines/reference/arrayAugment.js
+++ b/tests/baselines/reference/arrayAugment.js
@@ -11,4 +11,4 @@ var y: string[][]; // Expect no error here
 //// [arrayAugment.js]
 var x = [''];
 var y = x.split(4);
-var y;
+var y;// Expect no error here 
diff --git a/tests/baselines/reference/arrayLiteralAndArrayConstructorEquivalence1.js b/tests/baselines/reference/arrayLiteralAndArrayConstructorEquivalence1.js
index 879c08073a6..cdfaaef08ac 100644
--- a/tests/baselines/reference/arrayLiteralAndArrayConstructorEquivalence1.js
+++ b/tests/baselines/reference/arrayLiteralAndArrayConstructorEquivalence1.js
@@ -16,7 +16,7 @@ myCars3 = myCars5;
 //// [arrayLiteralAndArrayConstructorEquivalence1.js]
 var myCars = new Array();
 var myCars3 = new Array({});
-var myCars4;
+var myCars4;// error 
 var myCars5;
 myCars = myCars3;
 myCars = myCars4;
diff --git a/tests/baselines/reference/arrayLiteralWidened.js b/tests/baselines/reference/arrayLiteralWidened.js
index 53d2a19a1a4..0811e20effb 100644
--- a/tests/baselines/reference/arrayLiteralWidened.js
+++ b/tests/baselines/reference/arrayLiteralWidened.js
@@ -16,11 +16,11 @@ var c = [[[null]],[undefined]]
 
 //// [arrayLiteralWidened.js]
 // array literals are widened upon assignment according to their element type
-var a = [];
+var a = [];// any[] 
 var a = [null, null];
 var a = [undefined, undefined];
-var b = [[], [null, null]];
+var b = [[], [null, null]];// any[][] 
 var b = [[], []];
 var b = [[undefined, undefined]];
-var c = [[[]]];
+var c = [[[]]];// any[][][] 
 var c = [[[null]], [undefined]];
diff --git a/tests/baselines/reference/arrayLiteralWithMultipleBestCommonTypes.js b/tests/baselines/reference/arrayLiteralWithMultipleBestCommonTypes.js
index d2ca43796f0..8e72abf0b9e 100644
--- a/tests/baselines/reference/arrayLiteralWithMultipleBestCommonTypes.js
+++ b/tests/baselines/reference/arrayLiteralWithMultipleBestCommonTypes.js
@@ -20,10 +20,10 @@ var gs = [(b: { x: number; z?: number }) => 2, (a: { x: number; y?: number }) =>
 var a;
 var b;
 var c;
-var as = [a, b];
-var bs = [b, a];
-var cs = [a, b, c];
-var ds = [function (x) { return 1; }, function (x) { return 2; }];
-var es = [function (x) { return 2; }, function (x) { return 1; }];
-var fs = [function (a) { return 1; }, function (b) { return 2; }];
-var gs = [function (b) { return 2; }, function (a) { return 1; }];
+var as = [a, b];// { x: number; y?: number };[] 
+var bs = [b, a];// { x: number; z?: number };[] 
+var cs = [a, b, c];// { x: number; y?: number };[] 
+var ds = [function (x) { return 1; }, function (x) { return 2; }];// { (x:Object) => number }[] 
+var es = [function (x) { return 2; }, function (x) { return 1; }];// { (x:string) => number }[] 
+var fs = [function (a) { return 1; }, function (b) { return 2; }];// (a: { x: number; y?: number }) => number[] 
+var gs = [function (b) { return 2; }, function (a) { return 1; }];// (b: { x: number; z?: number }) => number[] 
diff --git a/tests/baselines/reference/arrayLiterals.js b/tests/baselines/reference/arrayLiterals.js
index f4dcb6ea2fe..7d65e5727b1 100644
--- a/tests/baselines/reference/arrayLiterals.js
+++ b/tests/baselines/reference/arrayLiterals.js
@@ -53,9 +53,9 @@ var __extends = this.__extends || function (d, b) {
 };
 // Empty array literal with no contextual type has type Undefined[]
 var arr1 = [[], [1], ['']];
-var arr1;
+var arr1;// Bug 825172: Error ({}[] does not match {}[]), but should be OK 
 var arr2 = [[null], [1], ['']];
-var arr2;
+var arr2;// Bug 825172: Error ({}[] does not match {}[]), but should be OK 
 // Array literal with elements of only EveryType E has type E[]
 var stringArrArr = [[''], [""]];
 var stringArrArr;
@@ -71,13 +71,13 @@ var C = (function () {
     return C;
 })();
 var classArr = [new C(), new C()];
-var classArr;
+var classArr;// Should be OK 
 var classTypeArray = [C, C, C];
-var classTypeArray;
+var classTypeArray;// Should OK, not be a parse error 
 // Contextual type C with numeric index signature makes array literal of EveryType E of type BCT(E,C)[]
 var context1 = [{ a: '', b: 0, c: '' }, { a: "", b: 3, c: 0 }];
 var context2 = [{ a: '', b: 0, c: '' }, { a: "", b: 3, c: 0 }];
-var context2;
+var context2;// Should be OK 
 // Contextual type C with numeric index signature of type Base makes array literal of Derived have type Base[]
 var Base = (function () {
     function Base() {
diff --git a/tests/baselines/reference/arrayLiteralsWithRecursiveGenerics.js b/tests/baselines/reference/arrayLiteralsWithRecursiveGenerics.js
index 335446ea3be..01862a7e46d 100644
--- a/tests/baselines/reference/arrayLiteralsWithRecursiveGenerics.js
+++ b/tests/baselines/reference/arrayLiteralsWithRecursiveGenerics.js
@@ -52,8 +52,8 @@ var MyList = (function () {
 var list;
 var list2;
 var myList;
-var xs = [list, myList];
-var ys = [list, list2];
-var zs = [list, null];
+var xs = [list, myList];// {}[] 
+var ys = [list, list2];// {}[] 
+var zs = [list, null];// List<number>[] 
 var myDerivedList;
-var as = [list, myDerivedList];
+var as = [list, myDerivedList];// List<number>[] 
diff --git a/tests/baselines/reference/arrayOfFunctionTypes3.js b/tests/baselines/reference/arrayOfFunctionTypes3.js
index 9d07a3211f9..bf560f27323 100644
--- a/tests/baselines/reference/arrayOfFunctionTypes3.js
+++ b/tests/baselines/reference/arrayOfFunctionTypes3.js
@@ -43,11 +43,11 @@ var b;
 var c;
 var z = [a, b, c];
 var r4 = z[0];
-var r5 = r4('');
+var r5 = r4('');// any not string 
 var r5b = r4(1);
 var a2;
 var b2;
 var c2;
 var z2 = [a2, b2, c2];
 var r6 = z2[0];
-var r7 = r6('');
+var r7 = r6('');// any not string 
diff --git a/tests/baselines/reference/arrayTypeOfFunctionTypes.js b/tests/baselines/reference/arrayTypeOfFunctionTypes.js
index 3c2aa7f1bcf..dbaea6d447f 100644
--- a/tests/baselines/reference/arrayTypeOfFunctionTypes.js
+++ b/tests/baselines/reference/arrayTypeOfFunctionTypes.js
@@ -25,8 +25,8 @@ var r2b = new r();
 var x2;
 var r3 = x2[1];
 var r4 = r3();
-var r4b = new r3();
+var r4b = new r3();// error 
 var x3;
 var r5 = x2[1];
 var r6 = r5();
-var r6b = new r5();
+var r6b = new r5();// error 
diff --git a/tests/baselines/reference/arrowFunctionContexts.js b/tests/baselines/reference/arrowFunctionContexts.js
index 899df623079..a69951cca1c 100644
--- a/tests/baselines/reference/arrowFunctionContexts.js
+++ b/tests/baselines/reference/arrowFunctionContexts.js
@@ -123,14 +123,14 @@ var Derived = (function (_super) {
 window.setTimeout(function () { return null; }, 100);
 // Arrow function as value in array literal
 var obj = function (n) { return ''; };
-var obj;
+var obj;// OK 
 var arr = [function (n) { return ''; }];
-var arr;
+var arr;// Incorrect error here (bug 829597) 
 // Arrow function as enum value
 var E;
 (function (E) {
     E[E["x"] = function () { return 4; }] = "x";
-    E[E["y"] = (function () { return _this; }).length] = "y";
+    E[E["y"] = (function () { return _this; }).length] = "y";// error, can't use this in enum 
 })(E || (E = {}));
 // Arrow function as module variable initializer
 var M;
@@ -161,9 +161,9 @@ var M2;
     window.setTimeout(function () { return null; }, 100);
     // Arrow function as value in array literal
     var obj = function (n) { return ''; };
-    var obj;
+    var obj;// OK 
     var arr = [function (n) { return ''; }];
-    var arr;
+    var arr;// Incorrect error here (bug 829597) 
     // Arrow function as enum value
     var E;
     (function (E) {
@@ -179,7 +179,7 @@ var M2;
 })(M2 || (M2 = {}));
 // <Identifier>(ParamList) => { ... } is a generic arrow function
 var generic1 = function (n) { return [n]; };
-var generic1;
+var generic1;// Incorrect error, Bug 829597 
 var generic2 = function (n) {
     return [n];
 };
diff --git a/tests/baselines/reference/arrowFunctionInConstructorArgument1.js b/tests/baselines/reference/arrowFunctionInConstructorArgument1.js
index 01645771343..42046f09c45 100644
--- a/tests/baselines/reference/arrowFunctionInConstructorArgument1.js
+++ b/tests/baselines/reference/arrowFunctionInConstructorArgument1.js
@@ -13,4 +13,4 @@ var C = (function () {
 })();
 var c = new C(function () {
     return asdf;
-});
+})// should error ;// should error 
diff --git a/tests/baselines/reference/assignmentCompatBug2.js b/tests/baselines/reference/assignmentCompatBug2.js
index 10c2a090ca5..5d57ffe60be 100644
--- a/tests/baselines/reference/assignmentCompatBug2.js
+++ b/tests/baselines/reference/assignmentCompatBug2.js
@@ -39,7 +39,7 @@ b3 = {
 }; // error
 
 //// [assignmentCompatBug2.js]
-var b2 = { a: 0 };
+var b2 = { a: 0 };// error 
 b2 = { a: 0 };
 b2 = { b: 0, a: 0 };
 var b3;
diff --git a/tests/baselines/reference/assignmentCompatWithCallSignatures3.js b/tests/baselines/reference/assignmentCompatWithCallSignatures3.js
index ea53f47e6a2..f0de8f69807 100644
--- a/tests/baselines/reference/assignmentCompatWithCallSignatures3.js
+++ b/tests/baselines/reference/assignmentCompatWithCallSignatures3.js
@@ -199,7 +199,7 @@ b15 = a15;
 var b16;
 a16 = b16;
 b16 = a16;
-var b17;
+var b17;// ok 
 a17 = b17;
 b17 = a17;
 var b18;
diff --git a/tests/baselines/reference/assignmentCompatWithCallSignaturesWithOptionalParameters.js b/tests/baselines/reference/assignmentCompatWithCallSignaturesWithOptionalParameters.js
index da0bb3bac22..b95f41207e7 100644
--- a/tests/baselines/reference/assignmentCompatWithCallSignaturesWithOptionalParameters.js
+++ b/tests/baselines/reference/assignmentCompatWithCallSignaturesWithOptionalParameters.js
@@ -72,7 +72,7 @@ var a5: (x?: number, y?: number) => number;
 //// [assignmentCompatWithCallSignaturesWithOptionalParameters.js]
 var b;
 var a;
-a = function () { return 1; };
+a = function () { return 1; }// ok, same number of required params ;
 a = function (x) { return 1; };
 a = function (x) { return 1; };
 a = b.a;
diff --git a/tests/baselines/reference/assignmentCompatWithCallSignaturesWithRestParameters.js b/tests/baselines/reference/assignmentCompatWithCallSignaturesWithRestParameters.js
index 25bc22acb64..17a5d483354 100644
--- a/tests/baselines/reference/assignmentCompatWithCallSignaturesWithRestParameters.js
+++ b/tests/baselines/reference/assignmentCompatWithCallSignaturesWithRestParameters.js
@@ -46,7 +46,7 @@ var a4: (x?: number, y?: string, ...z: number[]) => number;
     a4 = (x: number, ...args: string[]) => 1;  // error, rest params have type mismatch
 
 //// [assignmentCompatWithCallSignaturesWithRestParameters.js]
-var a;
+var a;// ok, same number of required params 
 a = function () { return 1; };
 a = function () {
     var args = [];
diff --git a/tests/baselines/reference/assignmentCompatWithConstructSignatures3.js b/tests/baselines/reference/assignmentCompatWithConstructSignatures3.js
index 402cdf1b7ed..3a33f30aca5 100644
--- a/tests/baselines/reference/assignmentCompatWithConstructSignatures3.js
+++ b/tests/baselines/reference/assignmentCompatWithConstructSignatures3.js
@@ -199,7 +199,7 @@ b15 = a15;
 var b16;
 a16 = b16;
 b16 = a16;
-var b17;
+var b17;// ok 
 a17 = b17;
 b17 = a17;
 var b18;
diff --git a/tests/baselines/reference/assignmentToObject.js b/tests/baselines/reference/assignmentToObject.js
index 6c11d67dd68..ee96e3519e3 100644
--- a/tests/baselines/reference/assignmentToObject.js
+++ b/tests/baselines/reference/assignmentToObject.js
@@ -6,5 +6,5 @@ var c: Object = a;  // should be error
 
 //// [assignmentToObject.js]
 var a = { toString: 5 };
-var b = a;
-var c = a;
+var b = a;// ok 
+var c = a;// should be error 
diff --git a/tests/baselines/reference/assignmentToObjectAndFunction.js b/tests/baselines/reference/assignmentToObjectAndFunction.js
index 48395b3bdc0..b4e4fada96f 100644
--- a/tests/baselines/reference/assignmentToObjectAndFunction.js
+++ b/tests/baselines/reference/assignmentToObjectAndFunction.js
@@ -30,20 +30,20 @@ module bad {
 var badFundule: Function = bad; // error
 
 //// [assignmentToObjectAndFunction.js]
-var errObj = { toString: 0 };
+var errObj = { toString: 0 };// Error, incompatible toString 
 var goodObj = {
     toString: function (x) {
         return "";
     }
-};
-var errFun = {};
+};// Ok, because toString is a subtype of Object's toString 
+var errFun = {};// Error for no call signature 
 function foo() {
 }
 var foo;
 (function (foo) {
     foo.boom = 0;
 })(foo || (foo = {}));
-var goodFundule = foo;
+var goodFundule = foo;// ok 
 function bar() {
 }
 var bar;
@@ -52,11 +52,11 @@ var bar;
     }
     bar.apply = apply;
 })(bar || (bar = {}));
-var goodFundule2 = bar;
+var goodFundule2 = bar;// ok 
 function bad() {
 }
 var bad;
 (function (bad) {
     bad.apply = 0;
 })(bad || (bad = {}));
-var badFundule = bad;
+var badFundule = bad;// error 
diff --git a/tests/baselines/reference/augmentedTypeAssignmentCompatIndexSignature.js b/tests/baselines/reference/augmentedTypeAssignmentCompatIndexSignature.js
index f05f0adbe8c..515e1efd352 100644
--- a/tests/baselines/reference/augmentedTypeAssignmentCompatIndexSignature.js
+++ b/tests/baselines/reference/augmentedTypeAssignmentCompatIndexSignature.js
@@ -25,5 +25,5 @@ var v2: {
 var o = {};
 var f = function () {
 };
-var v1 = o;
-var v2 = f;
+var v1 = o;// Should be allowed 
+var v2 = f;// Should be allowed 
diff --git a/tests/baselines/reference/augmentedTypeBracketAccessIndexSignature.js b/tests/baselines/reference/augmentedTypeBracketAccessIndexSignature.js
index 87d6b23e973..f91d0655b4b 100644
--- a/tests/baselines/reference/augmentedTypeBracketAccessIndexSignature.js
+++ b/tests/baselines/reference/augmentedTypeBracketAccessIndexSignature.js
@@ -14,6 +14,6 @@ var a = {}[0]; // Should be Foo
 var b = (() => { })[0]; // Should be Bar
 
 //// [augmentedTypeBracketAccessIndexSignature.js]
-var a = {}[0];
+var a = {}[0];// Should be Foo 
 var b = (function () {
-})[0];
+})[0];// Should be Bar 
diff --git a/tests/baselines/reference/augmentedTypeBracketNamedPropertyAccess.js b/tests/baselines/reference/augmentedTypeBracketNamedPropertyAccess.js
index b1d5fb71308..238c72a9414 100644
--- a/tests/baselines/reference/augmentedTypeBracketNamedPropertyAccess.js
+++ b/tests/baselines/reference/augmentedTypeBracketNamedPropertyAccess.js
@@ -17,7 +17,7 @@ var r4 = f['data']; // Should be number
 var o = {};
 var f = function () {
 };
-var r1 = o['data'];
-var r2 = o['functionData'];
-var r3 = f['functionData'];
-var r4 = f['data'];
+var r1 = o['data'];// Should be number 
+var r2 = o['functionData'];// Should be any (no property found) 
+var r3 = f['functionData'];// Should be string 
+var r4 = f['data'];// Should be number 
diff --git a/tests/baselines/reference/augmentedTypesClass.js b/tests/baselines/reference/augmentedTypesClass.js
index 6fe02ba5149..9985f917284 100644
--- a/tests/baselines/reference/augmentedTypesClass.js
+++ b/tests/baselines/reference/augmentedTypesClass.js
@@ -16,7 +16,7 @@ var c1 = (function () {
     };
     return c1;
 })();
-var c1 = 1;
+var c1 = 1;// error 
 //// class then enum
 var c4 = (function () {
     function c4() {
@@ -28,4 +28,4 @@ var c4 = (function () {
 var c4;
 (function (c4) {
     c4[c4["One"] = 0] = "One";
-})(c4 || (c4 = {}));
+})(c4 || (c4 = {}));// error 
diff --git a/tests/baselines/reference/augmentedTypesClass2a.js b/tests/baselines/reference/augmentedTypesClass2a.js
index dde530fd716..4253a6a37da 100644
--- a/tests/baselines/reference/augmentedTypesClass2a.js
+++ b/tests/baselines/reference/augmentedTypesClass2a.js
@@ -14,6 +14,6 @@ var c2 = (function () {
     return c2;
 })();
 function c2() {
-}
+}// error 
 var c2 = function () {
 };
diff --git a/tests/baselines/reference/augmentedTypesClass3.js b/tests/baselines/reference/augmentedTypesClass3.js
index 4af93a3bf2d..de24632ebd9 100644
--- a/tests/baselines/reference/augmentedTypesClass3.js
+++ b/tests/baselines/reference/augmentedTypesClass3.js
@@ -32,7 +32,7 @@ var c5a = (function () {
 var c5a;
 (function (c5a) {
     var y = 2;
-})(c5a || (c5a = {}));
+})(c5a || (c5a = {}));// should be ok 
 var c5b = (function () {
     function c5b() {
     }
@@ -43,7 +43,7 @@ var c5b = (function () {
 var c5b;
 (function (c5b) {
     c5b.y = 2;
-})(c5b || (c5b = {}));
+})(c5b || (c5b = {}));// should be ok 
 //// class then import
 var c5c = (function () {
     function c5c() {
diff --git a/tests/baselines/reference/augmentedTypesClass4.js b/tests/baselines/reference/augmentedTypesClass4.js
index 4f10c469ff1..738f58b2f91 100644
--- a/tests/baselines/reference/augmentedTypesClass4.js
+++ b/tests/baselines/reference/augmentedTypesClass4.js
@@ -19,4 +19,4 @@ var c3 = (function () {
     c3.prototype.bar = function () {
     };
     return c3;
-})();
+})();// error 
diff --git a/tests/baselines/reference/augmentedTypesEnum.js b/tests/baselines/reference/augmentedTypesEnum.js
index 4aaf83ee081..5795f40e018 100644
--- a/tests/baselines/reference/augmentedTypesEnum.js
+++ b/tests/baselines/reference/augmentedTypesEnum.js
@@ -41,20 +41,20 @@ var e1111;
 (function (e1111) {
     e1111[e1111["One"] = 0] = "One";
 })(e1111 || (e1111 = {}));
-var e1111 = 1;
+var e1111 = 1;// error 
 // enum then function
 var e2;
 (function (e2) {
     e2[e2["One"] = 0] = "One";
 })(e2 || (e2 = {}));
 function e2() {
-}
+}// error 
 var e3;
 (function (e3) {
     e3[e3["One"] = 0] = "One";
 })(e3 || (e3 = {}));
 var e3 = function () {
-};
+}// error // error ;// error 
 // enum then class
 var e4;
 (function (e4) {
@@ -66,7 +66,7 @@ var e4 = (function () {
     e4.prototype.foo = function () {
     };
     return e4;
-})();
+})();// error 
 // enum then enum
 var e5;
 (function (e5) {
@@ -83,7 +83,7 @@ var e5a;
 var e5a;
 (function (e5a) {
     e5a[e5a["One"] = 0] = "One";
-})(e5a || (e5a = {}));
+})(e5a || (e5a = {}));// error 
 // enum then internal module
 var e6;
 (function (e6) {
@@ -96,7 +96,7 @@ var e6a;
 var e6a;
 (function (e6a) {
     var y = 2;
-})(e6a || (e6a = {}));
+})(e6a || (e6a = {}));// should be error 
 var e6b;
 (function (e6b) {
     e6b[e6b["One"] = 0] = "One";
@@ -104,4 +104,4 @@ var e6b;
 var e6b;
 (function (e6b) {
     e6b.y = 2;
-})(e6b || (e6b = {}));
+})(e6b || (e6b = {}));// should be error 
diff --git a/tests/baselines/reference/augmentedTypesFunction.js b/tests/baselines/reference/augmentedTypesFunction.js
index a074a24054d..cecb3f9c905 100644
--- a/tests/baselines/reference/augmentedTypesFunction.js
+++ b/tests/baselines/reference/augmentedTypesFunction.js
@@ -42,16 +42,16 @@ module y5c { export interface I { foo(): void } } // should be an error
 // function then var
 function y1() {
 }
-var y1 = 1;
+var y1 = 1;// error 
 // function then function
 function y2() {
 }
 function y2() {
-}
+}// error 
 function y2a() {
 }
 var y2a = function () {
-};
+}// error // error ;// error 
 // function then class
 function y3() {
 }
@@ -59,7 +59,7 @@ var y3 = (function () {
     function y3() {
     }
     return y3;
-})();
+})();// error 
 function y3a() {
 }
 var y3a = (function () {
@@ -68,14 +68,14 @@ var y3a = (function () {
     y3a.prototype.foo = function () {
     };
     return y3a;
-})();
+})();// error 
 // function then enum
 function y4() {
 }
 var y4;
 (function (y4) {
     y4[y4["One"] = 0] = "One";
-})(y4 || (y4 = {}));
+})(y4 || (y4 = {}));// error 
 // function then internal module
 function y5() {
 }
@@ -84,12 +84,12 @@ function y5a() {
 var y5a;
 (function (y5a) {
     var y = 2;
-})(y5a || (y5a = {}));
+})(y5a || (y5a = {}));// should be an error 
 function y5b() {
 }
 var y5b;
 (function (y5b) {
     y5b.y = 3;
-})(y5b || (y5b = {}));
+})(y5b || (y5b = {}));// should be an error 
 function y5c() {
 }
diff --git a/tests/baselines/reference/augmentedTypesModules.js b/tests/baselines/reference/augmentedTypesModules.js
index bf172ab56b8..17534c173bc 100644
--- a/tests/baselines/reference/augmentedTypesModules.js
+++ b/tests/baselines/reference/augmentedTypesModules.js
@@ -98,7 +98,7 @@ module m6 { export var y = 2; }
 
 
 //// [augmentedTypesModules.js]
-var m1 = 1;
+var m1 = 1;// Should be allowed 
 var m1a;
 (function (m1a) {
     var y = 2;
@@ -109,7 +109,7 @@ var m1b;
     m1b.y = 2;
 })(m1b || (m1b = {}));
 var m1b = 1;
-var m1c = 1;
+var m1c = 1;// Should be allowed 
 var m1d;
 (function (m1d) {
     var I = (function () {
@@ -121,7 +121,7 @@ var m1d;
     })();
     m1d.I = I;
 })(m1d || (m1d = {}));
-var m1d = 1;
+var m1d = 1;// error 
 function m2() {
 }
 ;
@@ -168,7 +168,7 @@ var m3 = (function () {
     function m3() {
     }
     return m3;
-})();
+})();// ok since the module is not instantiated 
 var m3a;
 (function (m3a) {
     var y = 2;
@@ -179,7 +179,7 @@ var m3a = (function () {
     m3a.prototype.foo = function () {
     };
     return m3a;
-})();
+})();// error, class isn't ambient or declared before the module 
 var m3b = (function () {
     function m3b() {
     }
diff --git a/tests/baselines/reference/augmentedTypesModules3.js b/tests/baselines/reference/augmentedTypesModules3.js
index b02116035ce..00f364be485 100644
--- a/tests/baselines/reference/augmentedTypesModules3.js
+++ b/tests/baselines/reference/augmentedTypesModules3.js
@@ -11,7 +11,7 @@ var m3 = (function () {
     function m3() {
     }
     return m3;
-})();
+})();// ok since the module is not instantiated 
 var m3a;
 (function (m3a) {
     var y = 2;
@@ -22,4 +22,4 @@ var m3a = (function () {
     m3a.prototype.foo = function () {
     };
     return m3a;
-})();
+})();// error, class isn't ambient or declared before the module 
diff --git a/tests/baselines/reference/augmentedTypesVar.js b/tests/baselines/reference/augmentedTypesVar.js
index 35586df4f39..d76526b9aa0 100644
--- a/tests/baselines/reference/augmentedTypesVar.js
+++ b/tests/baselines/reference/augmentedTypesVar.js
@@ -43,17 +43,17 @@ var x1 = 2;
 // var then function
 var x2 = 1;
 function x2() {
-}
+}// should be an error 
 var x3 = 1;
 var x3 = function () {
-};
+}// should be an error // should be an error ;// should be an error 
 // var then class
 var x4 = 1;
 var x4 = (function () {
     function x4() {
     }
     return x4;
-})();
+})();// error 
 var x4a = 1;
 var x4a = (function () {
     function x4a() {
@@ -61,22 +61,22 @@ var x4a = (function () {
     x4a.prototype.foo = function () {
     };
     return x4a;
-})();
+})();// error 
 // var then enum
 var x5 = 1;
 var x5;
 (function (x5) {
     x5[x5["One"] = 0] = "One";
-})(x5 || (x5 = {}));
+})(x5 || (x5 = {}));// error 
 // var then module
 var x6 = 1;
 var x6a = 1;
 var x6a;
 (function (x6a) {
     var y = 2;
-})(x6a || (x6a = {}));
+})(x6a || (x6a = {}));// error since instantiated 
 var x6b = 1;
 var x6b;
 (function (x6b) {
     x6b.y = 2;
-})(x6b || (x6b = {}));
+})(x6b || (x6b = {}));// error 
diff --git a/tests/baselines/reference/autonumberingInEnums.js b/tests/baselines/reference/autonumberingInEnums.js
index 2d0bdc0282d..f9806e29c1b 100644
--- a/tests/baselines/reference/autonumberingInEnums.js
+++ b/tests/baselines/reference/autonumberingInEnums.js
@@ -14,5 +14,5 @@ var Foo;
 })(Foo || (Foo = {}));
 var Foo;
 (function (Foo) {
-    Foo[Foo["b"] = 0] = "b";
+    Foo[Foo["b"] = 0] = "b";// should work fine 
 })(Foo || (Foo = {}));
diff --git a/tests/baselines/reference/avoid.js b/tests/baselines/reference/avoid.js
index 45f4d52a7bc..44e18dd7b4e 100644
--- a/tests/baselines/reference/avoid.js
+++ b/tests/baselines/reference/avoid.js
@@ -23,8 +23,8 @@ var N=new f();  // ok with void fn
 function f() {
     var x = 1;
 }
-var y = f();
-var why = f();
+var y = f();// error void fn 
+var why = f();// error void fn 
 var w;
 w = f();
 var C = (function () {
@@ -34,5 +34,5 @@ var C = (function () {
     };
     return C;
 })();
-var z = new C().g();
-var N = new f();
+var z = new C().g();// error void fn 
+var N = new f();// ok with void fn 
diff --git a/tests/baselines/reference/baseCheck.js b/tests/baselines/reference/baseCheck.js
index 39eb8a312c9..701111672d8 100644
--- a/tests/baselines/reference/baseCheck.js
+++ b/tests/baselines/reference/baseCheck.js
@@ -65,7 +65,7 @@ var D = (function (_super) {
         this.z = z;
     }
     return D;
-})(C);
+})(C);// too few params 
 var E = (function (_super) {
     __extends(E, _super);
     function E(z) {
@@ -81,7 +81,7 @@ var F = (function (_super) {
         this.z = z;
     }
     return F;
-})(C);
+})(C);// first param type 
 function f() {
     if (x < 10) {
         x = 11;
diff --git a/tests/baselines/reference/bestCommonTypeOfConditionalExpressions.js b/tests/baselines/reference/bestCommonTypeOfConditionalExpressions.js
index f04f99d5fb3..d37bc85e2fd 100644
--- a/tests/baselines/reference/bestCommonTypeOfConditionalExpressions.js
+++ b/tests/baselines/reference/bestCommonTypeOfConditionalExpressions.js
@@ -61,18 +61,18 @@ var derived;
 var derived2;
 var r = true ? 1 : 2;
 var r3 = true ? 1 : {};
-var r4 = true ? a : b;
-var r5 = true ? b : a;
+var r4 = true ? a : b;// typeof a 
+var r5 = true ? b : a;// typeof b 
 var r6 = true ? function (x) {
 } : function (x) {
-};
+};// returns number => void 
 var r7 = true ? function (x) {
 } : function (x) {
 };
 var r8 = true ? function (x) {
 } : function (x) {
-};
-var r10 = true ? derived : derived2;
+};// returns Object => void 
+var r10 = true ? derived : derived2;// no error since we use the contextual type in BCT 
 var r11 = true ? base : derived2;
 function foo5(t, u) {
     return true ? t : u;
diff --git a/tests/baselines/reference/bestCommonTypeWithContextualTyping.js b/tests/baselines/reference/bestCommonTypeWithContextualTyping.js
index 804ec075292..780b5c14966 100644
--- a/tests/baselines/reference/bestCommonTypeWithContextualTyping.js
+++ b/tests/baselines/reference/bestCommonTypeWithContextualTyping.js
@@ -25,7 +25,7 @@ var e;
 // All of these should pass. Neither type is a supertype of the other, but the RHS should
 // always use Ellement in these examples (not Contextual). Because Ellement is assignable
 // to Contextual, no errors.
-var arr = [e];
-var obj = { s: e };
-var conditional = null ? e : e;
-var contextualOr = e || e;
+var arr = [e];// Ellement[] 
+var obj = { s: e };// { s: Ellement; [s: string]: Ellement } 
+var conditional = null ? e : e;// Ellement 
+var contextualOr = e || e;// Ellement 
diff --git a/tests/baselines/reference/bind1.js b/tests/baselines/reference/bind1.js
index 2aa31265797..0e78a1826be 100644
--- a/tests/baselines/reference/bind1.js
+++ b/tests/baselines/reference/bind1.js
@@ -13,5 +13,5 @@ var M;
         }
         return C;
     })();
-    M.C = C;
+    M.C = C;// this should be an unresolved symbol I error 
 })(M || (M = {}));
diff --git a/tests/baselines/reference/callExpressionWithTypeParameterConstrainedToOuterTypeParameter.js b/tests/baselines/reference/callExpressionWithTypeParameterConstrainedToOuterTypeParameter.js
index 9acb2fd1fb4..31ce264c4a1 100644
--- a/tests/baselines/reference/callExpressionWithTypeParameterConstrainedToOuterTypeParameter.js
+++ b/tests/baselines/reference/callExpressionWithTypeParameterConstrainedToOuterTypeParameter.js
@@ -7,4 +7,4 @@ var y = i(""); // y should be string
 
 //// [callExpressionWithTypeParameterConstrainedToOuterTypeParameter.js]
 var i;
-var y = i("");
+var y = i("");// y should be string 
diff --git a/tests/baselines/reference/callOnInstance.js b/tests/baselines/reference/callOnInstance.js
index fae3108b080..b35d41ede46 100644
--- a/tests/baselines/reference/callOnInstance.js
+++ b/tests/baselines/reference/callOnInstance.js
@@ -11,6 +11,6 @@ declare class C { constructor(value: number); }
 (new C(1))(); // Error for calling an instance
 
 //// [callOnInstance.js]
-var s1 = D();
+var s1 = D();// OK 
 var s2 = (new D(1))();
 (new C(1))();
diff --git a/tests/baselines/reference/callOverloads2.js b/tests/baselines/reference/callOverloads2.js
index 2bffd50a2ab..ae6bb2ca19e 100644
--- a/tests/baselines/reference/callOverloads2.js
+++ b/tests/baselines/reference/callOverloads2.js
@@ -38,7 +38,7 @@ function F1(s) {
 }
 function F1(a) {
     return a;
-}
+}// error -  duplicate identifier 
 var f1 = new Foo("hey");
 f1.bar1();
 Foo();
diff --git a/tests/baselines/reference/callSignatureWithoutAnnotationsOrBody.js b/tests/baselines/reference/callSignatureWithoutAnnotationsOrBody.js
index 7c742c1c323..1795c49f6da 100644
--- a/tests/baselines/reference/callSignatureWithoutAnnotationsOrBody.js
+++ b/tests/baselines/reference/callSignatureWithoutAnnotationsOrBody.js
@@ -23,7 +23,7 @@ var r5 = a.f();
 // Call signatures without a return type annotation and function body return 'any'
 function foo(x) {
 }
-var r = foo(1);
+var r = foo(1);// void since there's a body 
 var i;
 var r2 = i();
 var r3 = i.f();
diff --git a/tests/baselines/reference/callSignaturesThatDifferOnlyByReturnType2.js b/tests/baselines/reference/callSignaturesThatDifferOnlyByReturnType2.js
index fe6770ca933..3c6c15cb8a9 100644
--- a/tests/baselines/reference/callSignaturesThatDifferOnlyByReturnType2.js
+++ b/tests/baselines/reference/callSignaturesThatDifferOnlyByReturnType2.js
@@ -17,5 +17,5 @@ var r2 = x.foo(''); // error
 //// [callSignaturesThatDifferOnlyByReturnType2.js]
 var x;
 // BUG 822524
-var r = x.foo(1);
-var r2 = x.foo('');
+var r = x.foo(1);// no error 
+var r2 = x.foo('');// error 
diff --git a/tests/baselines/reference/callbacksDontShareTypes.js b/tests/baselines/reference/callbacksDontShareTypes.js
index f1e9865eee9..eee31b75628 100644
--- a/tests/baselines/reference/callbacksDontShareTypes.js
+++ b/tests/baselines/reference/callbacksDontShareTypes.js
@@ -27,7 +27,7 @@ var rf1 = function (x) {
 var r1a = _.map(c2, function (x) {
     return x.toFixed();
 });
-var r1b = _.map(c2, rf1);
+var r1b = _.map(c2, rf1);// this line should not cause the following 2 to have errors  
 var r5a = _.map(c2, function (x) {
     return x.toFixed();
 });
diff --git a/tests/baselines/reference/classAndVariableWithSameName.js b/tests/baselines/reference/classAndVariableWithSameName.js
index 818123cf8f9..3a883a203d0 100644
--- a/tests/baselines/reference/classAndVariableWithSameName.js
+++ b/tests/baselines/reference/classAndVariableWithSameName.js
@@ -16,7 +16,7 @@ var C = (function () {
     }
     return C;
 })();
-var C = '';
+var C = '';// error 
 var M;
 (function (M) {
     var D = (function () {
@@ -24,5 +24,5 @@ var M;
         }
         return D;
     })();
-    var D = 1;
+    var D = 1;// error 
 })(M || (M = {}));
diff --git a/tests/baselines/reference/classExtendsItself.js b/tests/baselines/reference/classExtendsItself.js
index 126d88acd9a..ef2714d760c 100644
--- a/tests/baselines/reference/classExtendsItself.js
+++ b/tests/baselines/reference/classExtendsItself.js
@@ -18,18 +18,18 @@ var C = (function (_super) {
         _super.apply(this, arguments);
     }
     return C;
-})(C);
+})(C);// error 
 var D = (function (_super) {
     __extends(D, _super);
     function D() {
         _super.apply(this, arguments);
     }
     return D;
-})(D);
+})(D);// error 
 var E = (function (_super) {
     __extends(E, _super);
     function E() {
         _super.apply(this, arguments);
     }
     return E;
-})(E);
+})(E);// error 
diff --git a/tests/baselines/reference/classExtendsItselfIndirectly.js b/tests/baselines/reference/classExtendsItselfIndirectly.js
index 584acb8bac6..04b37a77faa 100644
--- a/tests/baselines/reference/classExtendsItselfIndirectly.js
+++ b/tests/baselines/reference/classExtendsItselfIndirectly.js
@@ -24,7 +24,7 @@ var C = (function (_super) {
         _super.apply(this, arguments);
     }
     return C;
-})(E);
+})(E);// error 
 var D = (function (_super) {
     __extends(D, _super);
     function D() {
@@ -45,7 +45,7 @@ var C2 = (function (_super) {
         _super.apply(this, arguments);
     }
     return C2;
-})(E2);
+})(E2);// error 
 var D2 = (function (_super) {
     __extends(D2, _super);
     function D2() {
diff --git a/tests/baselines/reference/classExtendsItselfIndirectly2.js b/tests/baselines/reference/classExtendsItselfIndirectly2.js
index d8932270253..0b8c4f6af87 100644
--- a/tests/baselines/reference/classExtendsItselfIndirectly2.js
+++ b/tests/baselines/reference/classExtendsItselfIndirectly2.js
@@ -35,7 +35,7 @@ var C = (function (_super) {
         _super.apply(this, arguments);
     }
     return C;
-})(N.E);
+})(N.E);// error 
 var M;
 (function (M) {
     var D = (function (_super) {
@@ -66,7 +66,7 @@ var O;
             _super.apply(this, arguments);
         }
         return C2;
-    })(Q.E2);
+    })(Q.E2);// error 
     var P;
     (function (P) {
         var D2 = (function (_super) {
diff --git a/tests/baselines/reference/classExtendsItselfIndirectly3.js b/tests/baselines/reference/classExtendsItselfIndirectly3.js
index 26c3a85ef51..dc9e63db133 100644
--- a/tests/baselines/reference/classExtendsItselfIndirectly3.js
+++ b/tests/baselines/reference/classExtendsItselfIndirectly3.js
@@ -31,7 +31,7 @@ var C = (function (_super) {
         _super.apply(this, arguments);
     }
     return C;
-})(E);
+})(E);// error 
 //// [classExtendsItselfIndirectly_file2.js]
 var __extends = this.__extends || function (d, b) {
     for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
@@ -73,7 +73,7 @@ var C2 = (function (_super) {
         _super.apply(this, arguments);
     }
     return C2;
-})(E2);
+})(E2);// error 
 //// [classExtendsItselfIndirectly_file5.js]
 var __extends = this.__extends || function (d, b) {
     for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
diff --git a/tests/baselines/reference/classExtendsValidConstructorFunction.js b/tests/baselines/reference/classExtendsValidConstructorFunction.js
index 7de208a2614..cca5a983d40 100644
--- a/tests/baselines/reference/classExtendsValidConstructorFunction.js
+++ b/tests/baselines/reference/classExtendsValidConstructorFunction.js
@@ -14,11 +14,11 @@ var __extends = this.__extends || function (d, b) {
 };
 function foo() {
 }
-var x = new foo();
+var x = new foo();// can be used as a constructor function 
 var C = (function (_super) {
     __extends(C, _super);
     function C() {
         _super.apply(this, arguments);
     }
     return C;
-})(foo);
+})(foo);// error, cannot extend it though 
diff --git a/tests/baselines/reference/classImplementsClass2.js b/tests/baselines/reference/classImplementsClass2.js
index 0b4bb102403..ebcf00038bc 100644
--- a/tests/baselines/reference/classImplementsClass2.js
+++ b/tests/baselines/reference/classImplementsClass2.js
@@ -32,7 +32,7 @@ var C = (function () {
     function C() {
     }
     return C;
-})();
+})();// error 
 var C2 = (function (_super) {
     __extends(C2, _super);
     function C2() {
diff --git a/tests/baselines/reference/classMemberInitializerScoping.js b/tests/baselines/reference/classMemberInitializerScoping.js
index 70f562deb57..dbb04c176aa 100644
--- a/tests/baselines/reference/classMemberInitializerScoping.js
+++ b/tests/baselines/reference/classMemberInitializerScoping.js
@@ -27,7 +27,7 @@ var CCC = (function () {
         this.y = aaa;
         this.y = '';
     }
-    CCC.staticY = aaa;
+    CCC.staticY = aaa;// This shouldnt be error 
     return CCC;
 })();
 // above is equivalent to this:
diff --git a/tests/baselines/reference/classSideInheritance3.js b/tests/baselines/reference/classSideInheritance3.js
index 0e226d9f417..27c8b58ee58 100644
--- a/tests/baselines/reference/classSideInheritance3.js
+++ b/tests/baselines/reference/classSideInheritance3.js
@@ -46,6 +46,6 @@ var C = (function (_super) {
     }
     return C;
 })(A);
-var r1 = B;
-var r2 = B;
-var r3 = C;
+var r1 = B;// error 
+var r2 = B;// error 
+var r3 = C;// ok 
diff --git a/tests/baselines/reference/classWithBaseClassButNoConstructor.js b/tests/baselines/reference/classWithBaseClassButNoConstructor.js
index eff4b448034..253dc3783aa 100644
--- a/tests/baselines/reference/classWithBaseClassButNoConstructor.js
+++ b/tests/baselines/reference/classWithBaseClassButNoConstructor.js
@@ -60,8 +60,8 @@ var C = (function (_super) {
     return C;
 })(Base);
 var r = C;
-var c = new C();
-var c2 = new C(1);
+var c = new C();// error 
+var c2 = new C(1);// ok 
 var Base2 = (function () {
     function Base2(x) {
     }
@@ -75,8 +75,8 @@ var D = (function (_super) {
     return D;
 })(Base2);
 var r2 = D;
-var d = new D();
-var d2 = new D(1);
+var d = new D();// error 
+var d2 = new D(1);// ok 
 // specialized base class
 var D2 = (function (_super) {
     __extends(D2, _super);
@@ -86,8 +86,8 @@ var D2 = (function (_super) {
     return D2;
 })(Base2);
 var r3 = D2;
-var d3 = new D();
-var d4 = new D(1);
+var d3 = new D();// error 
+var d4 = new D(1);// ok 
 var D3 = (function (_super) {
     __extends(D3, _super);
     function D3() {
@@ -96,5 +96,5 @@ var D3 = (function (_super) {
     return D3;
 })(Base2);
 var r4 = D3;
-var d5 = new D();
-var d6 = new D(1);
+var d5 = new D();// error 
+var d6 = new D(1);// ok 
diff --git a/tests/baselines/reference/classWithConstructors.js b/tests/baselines/reference/classWithConstructors.js
index baa4cd7d26a..a03c191cb90 100644
--- a/tests/baselines/reference/classWithConstructors.js
+++ b/tests/baselines/reference/classWithConstructors.js
@@ -63,16 +63,16 @@ var NonGeneric;
         }
         return C;
     })();
-    var c = new C();
-    var c2 = new C('');
+    var c = new C();// error 
+    var c2 = new C('');// ok 
     var C2 = (function () {
         function C2(x) {
         }
         return C2;
     })();
-    var c3 = new C2();
-    var c4 = new C2('');
-    var c5 = new C2(1);
+    var c3 = new C2();// error 
+    var c4 = new C2('');// ok 
+    var c5 = new C2(1);// ok 
     var D = (function (_super) {
         __extends(D, _super);
         function D() {
@@ -80,9 +80,9 @@ var NonGeneric;
         }
         return D;
     })(C2);
-    var d = new D();
-    var d2 = new D(1);
-    var d3 = new D('');
+    var d = new D();// error 
+    var d2 = new D(1);// ok 
+    var d3 = new D('');// ok 
 })(NonGeneric || (NonGeneric = {}));
 var Generics;
 (function (Generics) {
@@ -91,16 +91,16 @@ var Generics;
         }
         return C;
     })();
-    var c = new C();
-    var c2 = new C('');
+    var c = new C();// error 
+    var c2 = new C('');// ok 
     var C2 = (function () {
         function C2(x) {
         }
         return C2;
     })();
-    var c3 = new C2();
-    var c4 = new C2('');
-    var c5 = new C2(1, 2);
+    var c3 = new C2();// error 
+    var c4 = new C2('');// ok 
+    var c5 = new C2(1, 2);// ok 
     var D = (function (_super) {
         __extends(D, _super);
         function D() {
@@ -108,7 +108,7 @@ var Generics;
         }
         return D;
     })(C2);
-    var d = new D();
-    var d2 = new D(1);
-    var d3 = new D('');
+    var d = new D();// error 
+    var d2 = new D(1);// ok 
+    var d3 = new D('');// ok 
 })(Generics || (Generics = {}));
diff --git a/tests/baselines/reference/classWithoutExplicitConstructor.js b/tests/baselines/reference/classWithoutExplicitConstructor.js
index b2574663fc2..520f2a58d3f 100644
--- a/tests/baselines/reference/classWithoutExplicitConstructor.js
+++ b/tests/baselines/reference/classWithoutExplicitConstructor.js
@@ -24,7 +24,7 @@ var C = (function () {
     return C;
 })();
 var c = new C();
-var c2 = new C(null);
+var c2 = new C(null);// error 
 var D = (function () {
     function D() {
         this.x = 2;
@@ -33,4 +33,4 @@ var D = (function () {
     return D;
 })();
 var d = new D();
-var d2 = new D(null);
+var d2 = new D(null);// error 
diff --git a/tests/baselines/reference/cloduleAcrossModuleDefinitions.js b/tests/baselines/reference/cloduleAcrossModuleDefinitions.js
index 280e30c8c7d..d2efd8a6737 100644
--- a/tests/baselines/reference/cloduleAcrossModuleDefinitions.js
+++ b/tests/baselines/reference/cloduleAcrossModuleDefinitions.js
@@ -36,4 +36,4 @@ var A;
     })(A.B || (A.B = {}));
     var B = A.B;
 })(A || (A = {}));
-var b;
+var b;// ok 
diff --git a/tests/baselines/reference/cloduleTest2.js b/tests/baselines/reference/cloduleTest2.js
index f2097ca9338..15cda15e292 100644
--- a/tests/baselines/reference/cloduleTest2.js
+++ b/tests/baselines/reference/cloduleTest2.js
@@ -43,7 +43,7 @@ var T1;
     (function (m3d) {
         m3d.y = 2;
     })(m3d || (m3d = {}));
-    var r = new m3d();
+    var r = new m3d();// error 
 })(T1 || (T1 = {}));
 var T2;
 (function (T2) {
@@ -51,7 +51,7 @@ var T2;
     (function (m3d) {
         m3d.y = 2;
     })(m3d || (m3d = {}));
-    var r = new m3d();
+    var r = new m3d();// error 
 })(T2 || (T2 = {}));
 var T3;
 (function (T3) {
@@ -79,5 +79,5 @@ var m3d;
 (function (m3d) {
     m3d.y = 2;
 })(m3d || (m3d = {}));
-var r = new m3d();
-var r2 = new m4d();
+var r = new m3d();// error 
+var r2 = new m4d();// error 
diff --git a/tests/baselines/reference/collisionArgumentsArrowFunctions.js b/tests/baselines/reference/collisionArgumentsArrowFunctions.js
index ba2777f47e2..2cb6df2a56b 100644
--- a/tests/baselines/reference/collisionArgumentsArrowFunctions.js
+++ b/tests/baselines/reference/collisionArgumentsArrowFunctions.js
@@ -22,25 +22,25 @@ var f1 = function (i) {
     for (var _i = 1; _i < arguments.length; _i++) {
         arguments[_i - 1] = arguments[_i];
     }
-    var arguments;
+    var arguments;// no error 
 };
 var f12 = function (arguments) {
     var rest = [];
     for (var _i = 1; _i < arguments.length; _i++) {
         rest[_i - 1] = arguments[_i];
     }
-    var arguments = 10;
+    var arguments = 10;// no error 
 };
 var f1NoError = function (arguments) {
-    var arguments = 10;
+    var arguments = 10;// no error 
 };
 var f2 = function () {
     var restParameters = [];
     for (var _i = 0; _i < arguments.length; _i++) {
         restParameters[_i - 0] = arguments[_i];
     }
-    var arguments = 10;
+    var arguments = 10;// No Error 
 };
 var f2NoError = function () {
-    var arguments = 10;
+    var arguments = 10;// no error 
 };
diff --git a/tests/baselines/reference/collisionArgumentsClassConstructor.js b/tests/baselines/reference/collisionArgumentsClassConstructor.js
index 971af025942..76c3c25ff77 100644
--- a/tests/baselines/reference/collisionArgumentsClassConstructor.js
+++ b/tests/baselines/reference/collisionArgumentsClassConstructor.js
@@ -94,7 +94,7 @@ var c1 = (function () {
         for (var _i = 1; _i < arguments.length; _i++) {
             arguments[_i - 1] = arguments[_i];
         }
-        var arguments;
+        var arguments;// no error 
     }
     return c1;
 })();
@@ -104,13 +104,13 @@ var c12 = (function () {
         for (var _i = 1; _i < arguments.length; _i++) {
             rest[_i - 1] = arguments[_i];
         }
-        var arguments = 10;
+        var arguments = 10;// no error 
     }
     return c12;
 })();
 var c1NoError = (function () {
     function c1NoError(arguments) {
-        var arguments = 10;
+        var arguments = 10;// no error 
     }
     return c1NoError;
 })();
@@ -120,13 +120,13 @@ var c2 = (function () {
         for (var _i = 0; _i < arguments.length; _i++) {
             restParameters[_i - 0] = arguments[_i];
         }
-        var arguments = 10;
+        var arguments = 10;// no error 
     }
     return c2;
 })();
 var c2NoError = (function () {
     function c2NoError() {
-        var arguments = 10;
+        var arguments = 10;// no error 
     }
     return c2NoError;
 })();
@@ -137,14 +137,14 @@ var c3 = (function () {
             restParameters[_i - 1] = arguments[_i];
         }
         this.arguments = arguments;
-        var arguments = 10;
+        var arguments = 10;// no error 
     }
     return c3;
 })();
 var c3NoError = (function () {
     function c3NoError(arguments) {
         this.arguments = arguments;
-        var arguments = 10;
+        var arguments = 10;// no error 
     }
     return c3NoError;
 })();
@@ -154,7 +154,7 @@ var c5 = (function () {
         for (var _i = 1; _i < arguments.length; _i++) {
             arguments[_i - 1] = arguments[_i];
         }
-        var arguments;
+        var arguments;// no error 
     }
     return c5;
 })();
@@ -164,13 +164,13 @@ var c52 = (function () {
         for (var _i = 1; _i < arguments.length; _i++) {
             rest[_i - 1] = arguments[_i];
         }
-        var arguments;
+        var arguments;// no error 
     }
     return c52;
 })();
 var c5NoError = (function () {
     function c5NoError(arguments) {
-        var arguments;
+        var arguments;// no error 
     }
     return c5NoError;
 })();
diff --git a/tests/baselines/reference/collisionArgumentsClassMethod.js b/tests/baselines/reference/collisionArgumentsClassMethod.js
index 0ca983b6587..323afbfd75e 100644
--- a/tests/baselines/reference/collisionArgumentsClassMethod.js
+++ b/tests/baselines/reference/collisionArgumentsClassMethod.js
@@ -57,34 +57,34 @@ var c1 = (function () {
         for (var _i = 1; _i < arguments.length; _i++) {
             arguments[_i - 1] = arguments[_i];
         }
-        var arguments;
+        var arguments;// no error 
     };
     c1.prototype.foo1 = function (arguments) {
         var rest = [];
         for (var _i = 1; _i < arguments.length; _i++) {
             rest[_i - 1] = arguments[_i];
         }
-        var arguments = 10;
+        var arguments = 10;// no error 
     };
     c1.prototype.fooNoError = function (arguments) {
-        var arguments = 10;
+        var arguments = 10;// no error 
     };
     c1.prototype.f4 = function (i) {
         var arguments = [];
         for (var _i = 1; _i < arguments.length; _i++) {
             arguments[_i - 1] = arguments[_i];
         }
-        var arguments;
+        var arguments;// no error 
     };
     c1.prototype.f41 = function (arguments) {
         var rest = [];
         for (var _i = 1; _i < arguments.length; _i++) {
             rest[_i - 1] = arguments[_i];
         }
-        var arguments;
+        var arguments;// no error 
     };
     c1.prototype.f4NoError = function (arguments) {
-        var arguments;
+        var arguments;// no error 
     };
     return c1;
 })();
@@ -96,10 +96,10 @@ var c3 = (function () {
         for (var _i = 0; _i < arguments.length; _i++) {
             restParameters[_i - 0] = arguments[_i];
         }
-        var arguments = 10;
+        var arguments = 10;// no error 
     };
     c3.prototype.fooNoError = function () {
-        var arguments = 10;
+        var arguments = 10;// no error 
     };
     return c3;
 })();
diff --git a/tests/baselines/reference/collisionArgumentsFunction.js b/tests/baselines/reference/collisionArgumentsFunction.js
index 6405a2bdc09..d869d854e1c 100644
--- a/tests/baselines/reference/collisionArgumentsFunction.js
+++ b/tests/baselines/reference/collisionArgumentsFunction.js
@@ -51,42 +51,42 @@ function f1(arguments) {
     for (var _i = 1; _i < arguments.length; _i++) {
         restParameters[_i - 1] = arguments[_i];
     }
-    var arguments = 10;
+    var arguments = 10;// no error 
 }
 function f12(i) {
     var arguments = [];
     for (var _i = 1; _i < arguments.length; _i++) {
         arguments[_i - 1] = arguments[_i];
     }
-    var arguments;
+    var arguments;// no error 
 }
 function f1NoError(arguments) {
-    var arguments = 10;
+    var arguments = 10;// no error 
 }
 function f3() {
     var restParameters = [];
     for (var _i = 0; _i < arguments.length; _i++) {
         restParameters[_i - 0] = arguments[_i];
     }
-    var arguments = 10;
+    var arguments = 10;// no error 
 }
 function f3NoError() {
-    var arguments = 10;
+    var arguments = 10;// no error 
 }
 function f4(arguments) {
     var rest = [];
     for (var _i = 1; _i < arguments.length; _i++) {
         rest[_i - 1] = arguments[_i];
     }
-    var arguments;
+    var arguments;// No error 
 }
 function f42(i) {
     var arguments = [];
     for (var _i = 1; _i < arguments.length; _i++) {
         arguments[_i - 1] = arguments[_i];
     }
-    var arguments;
+    var arguments;// No error 
 }
 function f4NoError(arguments) {
-    var arguments;
+    var arguments;// No error 
 }
diff --git a/tests/baselines/reference/collisionArgumentsFunctionExpressions.js b/tests/baselines/reference/collisionArgumentsFunctionExpressions.js
index a57be35eab7..40c732d14e8 100644
--- a/tests/baselines/reference/collisionArgumentsFunctionExpressions.js
+++ b/tests/baselines/reference/collisionArgumentsFunctionExpressions.js
@@ -41,43 +41,43 @@ function foo() {
         for (var _i = 1; _i < arguments.length; _i++) {
             restParameters[_i - 1] = arguments[_i];
         }
-        var arguments = 10;
+        var arguments = 10;// no error 
     }
     function f12(i) {
         var arguments = [];
         for (var _i = 1; _i < arguments.length; _i++) {
             arguments[_i - 1] = arguments[_i];
         }
-        var arguments;
+        var arguments;// no error 
     }
     function f1NoError(arguments) {
-        var arguments = 10;
+        var arguments = 10;// no error 
     }
     function f3() {
         var restParameters = [];
         for (var _i = 0; _i < arguments.length; _i++) {
             restParameters[_i - 0] = arguments[_i];
         }
-        var arguments = 10;
+        var arguments = 10;// no error 
     }
     function f3NoError() {
-        var arguments = 10;
+        var arguments = 10;// no error 
     }
     function f4(arguments) {
         var rest = [];
         for (var _i = 1; _i < arguments.length; _i++) {
             rest[_i - 1] = arguments[_i];
         }
-        var arguments;
+        var arguments;// No error 
     }
     function f42(i) {
         var arguments = [];
         for (var _i = 1; _i < arguments.length; _i++) {
             arguments[_i - 1] = arguments[_i];
         }
-        var arguments;
+        var arguments;// No error 
     }
     function f4NoError(arguments) {
-        var arguments;
+        var arguments;// No error 
     }
 }
diff --git a/tests/baselines/reference/collisionArgumentsInType.js b/tests/baselines/reference/collisionArgumentsInType.js
index 3047fd05fd6..826c264fc98 100644
--- a/tests/baselines/reference/collisionArgumentsInType.js
+++ b/tests/baselines/reference/collisionArgumentsInType.js
@@ -15,7 +15,7 @@ var v21: {
 }
 
 //// [collisionArgumentsInType.js]
-var v1;
-var v12;
+var v1;// no error - no code gen 
+var v12;// no error - no code gen 
 var v2;
 var v21;
diff --git a/tests/baselines/reference/collisionRestParameterArrowFunctions.js b/tests/baselines/reference/collisionRestParameterArrowFunctions.js
index d23ef5c1418..48040789e53 100644
--- a/tests/baselines/reference/collisionRestParameterArrowFunctions.js
+++ b/tests/baselines/reference/collisionRestParameterArrowFunctions.js
@@ -19,18 +19,18 @@ var f1 = function (_i) {
     for (var _i = 1; _i < arguments.length; _i++) {
         restParameters[_i - 1] = arguments[_i];
     }
-    var _i = 10;
+    var _i = 10;// no error 
 };
 var f1NoError = function (_i) {
-    var _i = 10;
+    var _i = 10;// no error 
 };
 var f2 = function () {
     var restParameters = [];
     for (var _i = 0; _i < arguments.length; _i++) {
         restParameters[_i - 0] = arguments[_i];
     }
-    var _i = 10;
+    var _i = 10;// No Error 
 };
 var f2NoError = function () {
-    var _i = 10;
+    var _i = 10;// no error 
 };
diff --git a/tests/baselines/reference/collisionRestParameterClassConstructor.js b/tests/baselines/reference/collisionRestParameterClassConstructor.js
index af25b4da658..86ffd7b4d76 100644
--- a/tests/baselines/reference/collisionRestParameterClassConstructor.js
+++ b/tests/baselines/reference/collisionRestParameterClassConstructor.js
@@ -74,13 +74,13 @@ var c1 = (function () {
         for (var _i = 1; _i < arguments.length; _i++) {
             restParameters[_i - 1] = arguments[_i];
         }
-        var _i = 10;
+        var _i = 10;// no error 
     }
     return c1;
 })();
 var c1NoError = (function () {
     function c1NoError(_i) {
-        var _i = 10;
+        var _i = 10;// no error 
     }
     return c1NoError;
 })();
@@ -90,13 +90,13 @@ var c2 = (function () {
         for (var _i = 0; _i < arguments.length; _i++) {
             restParameters[_i - 0] = arguments[_i];
         }
-        var _i = 10;
+        var _i = 10;// no error 
     }
     return c2;
 })();
 var c2NoError = (function () {
     function c2NoError() {
-        var _i = 10;
+        var _i = 10;// no error 
     }
     return c2NoError;
 })();
@@ -107,14 +107,14 @@ var c3 = (function () {
             restParameters[_i - 1] = arguments[_i];
         }
         this._i = _i;
-        var _i = 10;
+        var _i = 10;// no error 
     }
     return c3;
 })();
 var c3NoError = (function () {
     function c3NoError(_i) {
         this._i = _i;
-        var _i = 10;
+        var _i = 10;// no error 
     }
     return c3NoError;
 })();
@@ -124,13 +124,13 @@ var c5 = (function () {
         for (var _i = 1; _i < arguments.length; _i++) {
             rest[_i - 1] = arguments[_i];
         }
-        var _i;
+        var _i;// no error 
     }
     return c5;
 })();
 var c5NoError = (function () {
     function c5NoError(_i) {
-        var _i;
+        var _i;// no error 
     }
     return c5NoError;
 })();
diff --git a/tests/baselines/reference/collisionRestParameterClassMethod.js b/tests/baselines/reference/collisionRestParameterClassMethod.js
index f5f4978472e..270c3af401d 100644
--- a/tests/baselines/reference/collisionRestParameterClassMethod.js
+++ b/tests/baselines/reference/collisionRestParameterClassMethod.js
@@ -47,20 +47,20 @@ var c1 = (function () {
         for (var _i = 1; _i < arguments.length; _i++) {
             restParameters[_i - 1] = arguments[_i];
         }
-        var _i = 10;
+        var _i = 10;// no error 
     };
     c1.prototype.fooNoError = function (_i) {
-        var _i = 10;
+        var _i = 10;// no error 
     };
     c1.prototype.f4 = function (_i) {
         var rest = [];
         for (var _i = 1; _i < arguments.length; _i++) {
             rest[_i - 1] = arguments[_i];
         }
-        var _i;
+        var _i;// no error 
     };
     c1.prototype.f4NoError = function (_i) {
-        var _i;
+        var _i;// no error 
     };
     return c1;
 })();
@@ -72,10 +72,10 @@ var c3 = (function () {
         for (var _i = 0; _i < arguments.length; _i++) {
             restParameters[_i - 0] = arguments[_i];
         }
-        var _i = 10;
+        var _i = 10;// no error 
     };
     c3.prototype.fooNoError = function () {
-        var _i = 10;
+        var _i = 10;// no error 
     };
     return c3;
 })();
diff --git a/tests/baselines/reference/collisionRestParameterFunction.js b/tests/baselines/reference/collisionRestParameterFunction.js
index a3287ca87d0..8efe4493b69 100644
--- a/tests/baselines/reference/collisionRestParameterFunction.js
+++ b/tests/baselines/reference/collisionRestParameterFunction.js
@@ -40,20 +40,20 @@ function f1(_i) {
     for (var _i = 1; _i < arguments.length; _i++) {
         restParameters[_i - 1] = arguments[_i];
     }
-    var _i = 10;
+    var _i = 10;// no error 
 }
 function f1NoError(_i) {
-    var _i = 10;
+    var _i = 10;// no error 
 }
 function f3() {
     var restParameters = [];
     for (var _i = 0; _i < arguments.length; _i++) {
         restParameters[_i - 0] = arguments[_i];
     }
-    var _i = 10;
+    var _i = 10;// no error 
 }
 function f3NoError() {
-    var _i = 10;
+    var _i = 10;// no error 
 }
 function f4(_i) {
     var rest = [];
diff --git a/tests/baselines/reference/collisionRestParameterFunctionExpressions.js b/tests/baselines/reference/collisionRestParameterFunctionExpressions.js
index fa50850ceef..3364a0ee022 100644
--- a/tests/baselines/reference/collisionRestParameterFunctionExpressions.js
+++ b/tests/baselines/reference/collisionRestParameterFunctionExpressions.js
@@ -31,20 +31,20 @@ function foo() {
         for (var _i = 1; _i < arguments.length; _i++) {
             restParameters[_i - 1] = arguments[_i];
         }
-        var _i = 10;
+        var _i = 10;// no error 
     }
     function f1NoError(_i) {
-        var _i = 10;
+        var _i = 10;// no error 
     }
     function f3() {
         var restParameters = [];
         for (var _i = 0; _i < arguments.length; _i++) {
             restParameters[_i - 0] = arguments[_i];
         }
-        var _i = 10;
+        var _i = 10;// no error 
     }
     function f3NoError() {
-        var _i = 10;
+        var _i = 10;// no error 
     }
     function f4(_i) {
         var rest = [];
diff --git a/tests/baselines/reference/collisionRestParameterInType.js b/tests/baselines/reference/collisionRestParameterInType.js
index 3910cbc490d..2f8665eb747 100644
--- a/tests/baselines/reference/collisionRestParameterInType.js
+++ b/tests/baselines/reference/collisionRestParameterInType.js
@@ -8,5 +8,5 @@ var v2: {
 }
 
 //// [collisionRestParameterInType.js]
-var v1;
+var v1;// no error - no code gen 
 var v2;
diff --git a/tests/baselines/reference/collisionSuperAndLocalVarInConstructor.js b/tests/baselines/reference/collisionSuperAndLocalVarInConstructor.js
index 926b310a83d..c15380695d8 100644
--- a/tests/baselines/reference/collisionSuperAndLocalVarInConstructor.js
+++ b/tests/baselines/reference/collisionSuperAndLocalVarInConstructor.js
@@ -27,10 +27,10 @@ var __extends = this.__extends || function (d, b) {
     __.prototype = b.prototype;
     d.prototype = new __();
 };
-var _super = 10;
+var _super = 10;// No Error 
 var Foo = (function () {
     function Foo() {
-        var _super = 10;
+        var _super = 10;// No error 
     }
     return Foo;
 })();
@@ -38,7 +38,7 @@ var b = (function (_super) {
     __extends(b, _super);
     function b() {
         _super.call(this);
-        var _super = 10;
+        var _super = 10;// Should be error  
     }
     return b;
 })(Foo);
@@ -47,7 +47,7 @@ var c = (function (_super) {
     function c() {
         _super.call(this);
         var x = function () {
-            var _super = 10;
+            var _super = 10;// Should be error 
         };
     }
     return c;
diff --git a/tests/baselines/reference/collisionSuperAndLocalVarInMethod.js b/tests/baselines/reference/collisionSuperAndLocalVarInMethod.js
index e99c9235cc6..6d349439da2 100644
--- a/tests/baselines/reference/collisionSuperAndLocalVarInMethod.js
+++ b/tests/baselines/reference/collisionSuperAndLocalVarInMethod.js
@@ -25,12 +25,12 @@ var __extends = this.__extends || function (d, b) {
     __.prototype = b.prototype;
     d.prototype = new __();
 };
-var _super = 10;
+var _super = 10;// No Error 
 var Foo = (function () {
     function Foo() {
     }
     Foo.prototype.x = function () {
-        var _super = 10;
+        var _super = 10;// No error 
     };
     return Foo;
 })();
@@ -40,7 +40,7 @@ var b = (function (_super) {
         _super.apply(this, arguments);
     }
     b.prototype.foo = function () {
-        var _super = 10;
+        var _super = 10;// Should be error  
     };
     return b;
 })(Foo);
@@ -51,7 +51,7 @@ var c = (function (_super) {
     }
     c.prototype.foo = function () {
         var x = function () {
-            var _super = 10;
+            var _super = 10;// Should be error 
         };
     };
     return c;
diff --git a/tests/baselines/reference/collisionSuperAndLocalVarInProperty.js b/tests/baselines/reference/collisionSuperAndLocalVarInProperty.js
index 7e3b8a5c5c3..527126391bf 100644
--- a/tests/baselines/reference/collisionSuperAndLocalVarInProperty.js
+++ b/tests/baselines/reference/collisionSuperAndLocalVarInProperty.js
@@ -24,15 +24,15 @@ var __extends = this.__extends || function (d, b) {
     __.prototype = b.prototype;
     d.prototype = new __();
 };
-var _super = 10;
+var _super = 10;// No Error 
 var Foo = (function () {
     function Foo() {
         this.prop1 = {
             doStuff: function () {
-                var _super = 10;
+                var _super = 10;// No error 
             }
         };
-        this._super = 10;
+        this._super = 10;// No error 
     }
     return Foo;
 })();
@@ -42,10 +42,10 @@ var b = (function (_super) {
         _super.apply(this, arguments);
         this.prop2 = {
             doStuff: function () {
-                var _super = 10;
+                var _super = 10;// Should be error  
             }
         };
-        this._super = 10;
+        this._super = 10;// No error 
     }
     return b;
 })(Foo);
diff --git a/tests/baselines/reference/collisionSuperAndNameResolution.js b/tests/baselines/reference/collisionSuperAndNameResolution.js
index 26633a6006e..749476d316a 100644
--- a/tests/baselines/reference/collisionSuperAndNameResolution.js
+++ b/tests/baselines/reference/collisionSuperAndNameResolution.js
@@ -19,7 +19,7 @@ var __extends = this.__extends || function (d, b) {
     d.prototype = new __();
 };
 var console;
-var _super = 10;
+var _super = 10;// No error 
 var base = (function () {
     function base() {
     }
diff --git a/tests/baselines/reference/collisionThisExpressionAndAliasInGlobal.js b/tests/baselines/reference/collisionThisExpressionAndAliasInGlobal.js
index 9ce9dd131a9..ef56e46b186 100644
--- a/tests/baselines/reference/collisionThisExpressionAndAliasInGlobal.js
+++ b/tests/baselines/reference/collisionThisExpressionAndAliasInGlobal.js
@@ -12,4 +12,4 @@ var a;
     a.b = 10;
 })(a || (a = {}));
 var f = function () { return _this; };
-var _this = a;
+var _this = a;// Error 
diff --git a/tests/baselines/reference/collisionThisExpressionAndAmbientClassInGlobal.js b/tests/baselines/reference/collisionThisExpressionAndAmbientClassInGlobal.js
index 10238a55f47..e386021528b 100644
--- a/tests/baselines/reference/collisionThisExpressionAndAmbientClassInGlobal.js
+++ b/tests/baselines/reference/collisionThisExpressionAndAmbientClassInGlobal.js
@@ -7,4 +7,4 @@ var a = new _this(); // Error
 //// [collisionThisExpressionAndAmbientClassInGlobal.js]
 var _this = this;
 var f = function () { return _this; };
-var a = new _this();
+var a = new _this();// Error 
diff --git a/tests/baselines/reference/collisionThisExpressionAndNameResolution.js b/tests/baselines/reference/collisionThisExpressionAndNameResolution.js
index 969f3eff090..c2200d90cb2 100644
--- a/tests/baselines/reference/collisionThisExpressionAndNameResolution.js
+++ b/tests/baselines/reference/collisionThisExpressionAndNameResolution.js
@@ -18,7 +18,7 @@ var Foo = (function () {
     function Foo() {
     }
     Foo.prototype.x = function () {
-        var _this = 10;
+        var _this = 10;// Local var. No this capture in x(), so no conflict. 
         function inner() {
             var _this = this;
             console.log(_this);
diff --git a/tests/baselines/reference/collisionThisExpressionAndParameter.js b/tests/baselines/reference/collisionThisExpressionAndParameter.js
index 7df383afcdf..4dc4b6618c6 100644
--- a/tests/baselines/reference/collisionThisExpressionAndParameter.js
+++ b/tests/baselines/reference/collisionThisExpressionAndParameter.js
@@ -98,7 +98,7 @@ var Foo = (function () {
     function Foo() {
     }
     Foo.prototype.x = function () {
-        var _this = 10;
+        var _this = 10;// Local var. No this capture in x(), so no conflict. 
         function inner(_this) {
             var _this = this;
             return function (x) { return _this; };
@@ -117,7 +117,7 @@ var Foo = (function () {
         };
     };
     Foo.prototype.x1 = function () {
-        var _this = 10;
+        var _this = 10;// Local var. No this capture in x(), so no conflict. 
         function inner(_this) {
         }
     };
diff --git a/tests/baselines/reference/commaOperatorOtherInvalidOperation.js b/tests/baselines/reference/commaOperatorOtherInvalidOperation.js
index 467a45dcfd6..37c89a1de46 100644
--- a/tests/baselines/reference/commaOperatorOtherInvalidOperation.js
+++ b/tests/baselines/reference/commaOperatorOtherInvalidOperation.js
@@ -19,10 +19,10 @@ function foo1<T1, T2>() {
 function foo(x, y) {
     return x, y;
 }
-var resultIsString = foo(1, "123");
+var resultIsString = foo(1, "123");//error here 
 //TypeParameters
 function foo1() {
     var x;
     var y;
-    var result = (x, y);
+    var result = (x, y);//error here 
 }
diff --git a/tests/baselines/reference/commentsEnums.js b/tests/baselines/reference/commentsEnums.js
index 89a68d18308..7890b57e0ef 100644
--- a/tests/baselines/reference/commentsEnums.js
+++ b/tests/baselines/reference/commentsEnums.js
@@ -17,7 +17,7 @@ x = Colors.FancyPink;
 var Colors;
 (function (Colors) {
     /** Fancy name for 'blue'*/
-    Colors[Colors["Cornflower"] = 0] = "Cornflower";
+    Colors[Colors["Cornflower"] = 0] = "Cornflower";/* blue */ 
     /** Fancy name for 'pink'*/
     Colors[Colors["FancyPink"] = 1] = "FancyPink";
 })(Colors || (Colors = {}));
diff --git a/tests/baselines/reference/comparisonOperatorWithNoRelationshipPrimitiveType.js b/tests/baselines/reference/comparisonOperatorWithNoRelationshipPrimitiveType.js
index 5c6e863b900..e03eaf17754 100644
--- a/tests/baselines/reference/comparisonOperatorWithNoRelationshipPrimitiveType.js
+++ b/tests/baselines/reference/comparisonOperatorWithNoRelationshipPrimitiveType.js
@@ -231,7 +231,7 @@ var e;
 var r1a1 = a < b;
 var r1a1 = a < c;
 var r1a1 = a < d;
-var r1a1 = a < e;
+var r1a1 = a < e;// no error, expected 
 var r1b1 = b < a;
 var r1b1 = b < c;
 var r1b1 = b < d;
@@ -244,7 +244,7 @@ var r1d1 = d < a;
 var r1d1 = d < b;
 var r1d1 = d < c;
 var r1d1 = d < e;
-var r1e1 = e < a;
+var r1e1 = e < a;// no error, expected 
 var r1e1 = e < b;
 var r1e1 = e < c;
 var r1e1 = e < d;
@@ -252,7 +252,7 @@ var r1e1 = e < d;
 var r2a1 = a > b;
 var r2a1 = a > c;
 var r2a1 = a > d;
-var r2a1 = a > e;
+var r2a1 = a > e;// no error, expected 
 var r2b1 = b > a;
 var r2b1 = b > c;
 var r2b1 = b > d;
@@ -265,7 +265,7 @@ var r2d1 = d > a;
 var r2d1 = d > b;
 var r2d1 = d > c;
 var r2d1 = d > e;
-var r2e1 = e > a;
+var r2e1 = e > a;// no error, expected 
 var r2e1 = e > b;
 var r2e1 = e > c;
 var r2e1 = e > d;
@@ -273,7 +273,7 @@ var r2e1 = e > d;
 var r3a1 = a <= b;
 var r3a1 = a <= c;
 var r3a1 = a <= d;
-var r3a1 = a <= e;
+var r3a1 = a <= e;// no error, expected 
 var r3b1 = b <= a;
 var r3b1 = b <= c;
 var r3b1 = b <= d;
@@ -286,7 +286,7 @@ var r3d1 = d <= a;
 var r3d1 = d <= b;
 var r3d1 = d <= c;
 var r3d1 = d <= e;
-var r3e1 = e <= a;
+var r3e1 = e <= a;// no error, expected 
 var r3e1 = e <= b;
 var r3e1 = e <= c;
 var r3e1 = e <= d;
@@ -294,7 +294,7 @@ var r3e1 = e <= d;
 var r4a1 = a >= b;
 var r4a1 = a >= c;
 var r4a1 = a >= d;
-var r4a1 = a >= e;
+var r4a1 = a >= e;// no error, expected 
 var r4b1 = b >= a;
 var r4b1 = b >= c;
 var r4b1 = b >= d;
@@ -307,7 +307,7 @@ var r4d1 = d >= a;
 var r4d1 = d >= b;
 var r4d1 = d >= c;
 var r4d1 = d >= e;
-var r4e1 = e >= a;
+var r4e1 = e >= a;// no error, expected 
 var r4e1 = e >= b;
 var r4e1 = e >= c;
 var r4e1 = e >= d;
@@ -315,7 +315,7 @@ var r4e1 = e >= d;
 var r5a1 = a == b;
 var r5a1 = a == c;
 var r5a1 = a == d;
-var r5a1 = a == e;
+var r5a1 = a == e;// no error, expected 
 var r5b1 = b == a;
 var r5b1 = b == c;
 var r5b1 = b == d;
@@ -328,7 +328,7 @@ var r5d1 = d == a;
 var r5d1 = d == b;
 var r5d1 = d == c;
 var r5d1 = d == e;
-var r5e1 = e == a;
+var r5e1 = e == a;// no error, expected 
 var r5e1 = e == b;
 var r5e1 = e == c;
 var r5e1 = e == d;
@@ -336,7 +336,7 @@ var r5e1 = e == d;
 var r6a1 = a != b;
 var r6a1 = a != c;
 var r6a1 = a != d;
-var r6a1 = a != e;
+var r6a1 = a != e;// no error, expected 
 var r6b1 = b != a;
 var r6b1 = b != c;
 var r6b1 = b != d;
@@ -349,7 +349,7 @@ var r6d1 = d != a;
 var r6d1 = d != b;
 var r6d1 = d != c;
 var r6d1 = d != e;
-var r6e1 = e != a;
+var r6e1 = e != a;// no error, expected 
 var r6e1 = e != b;
 var r6e1 = e != c;
 var r6e1 = e != d;
@@ -357,7 +357,7 @@ var r6e1 = e != d;
 var r7a1 = a === b;
 var r7a1 = a === c;
 var r7a1 = a === d;
-var r7a1 = a === e;
+var r7a1 = a === e;// no error, expected 
 var r7b1 = b === a;
 var r7b1 = b === c;
 var r7b1 = b === d;
@@ -370,7 +370,7 @@ var r7d1 = d === a;
 var r7d1 = d === b;
 var r7d1 = d === c;
 var r7d1 = d === e;
-var r7e1 = e === a;
+var r7e1 = e === a;// no error, expected 
 var r7e1 = e === b;
 var r7e1 = e === c;
 var r7e1 = e === d;
@@ -378,7 +378,7 @@ var r7e1 = e === d;
 var r8a1 = a !== b;
 var r8a1 = a !== c;
 var r8a1 = a !== d;
-var r8a1 = a !== e;
+var r8a1 = a !== e;// no error, expected 
 var r8b1 = b !== a;
 var r8b1 = b !== c;
 var r8b1 = b !== d;
@@ -391,7 +391,7 @@ var r8d1 = d !== a;
 var r8d1 = d !== b;
 var r8d1 = d !== c;
 var r8d1 = d !== e;
-var r8e1 = e !== a;
+var r8e1 = e !== a;// no error, expected 
 var r8e1 = e !== b;
 var r8e1 = e !== c;
 var r8e1 = e !== d;
diff --git a/tests/baselines/reference/conditionalExpression1.js b/tests/baselines/reference/conditionalExpression1.js
index 92010908553..da59ef6c802 100644
--- a/tests/baselines/reference/conditionalExpression1.js
+++ b/tests/baselines/reference/conditionalExpression1.js
@@ -2,4 +2,4 @@
 var x: boolean = (true ? 1 : ""); // should be an error
 
 //// [conditionalExpression1.js]
-var x = (true ? 1 : "");
+var x = (true ? 1 : "");// should be an error 
diff --git a/tests/baselines/reference/constraints0.js b/tests/baselines/reference/constraints0.js
index 17a71a92259..6d48eaabec0 100644
--- a/tests/baselines/reference/constraints0.js
+++ b/tests/baselines/reference/constraints0.js
@@ -17,6 +17,6 @@ var v2: C<B>; // should not work
 var y = v1.x.a; // 'a' should be of type 'number'
 
 //// [constraints0.js]
-var v1;
-var v2;
-var y = v1.x.a;
+var v1;// should work 
+var v2;// should not work 
+var y = v1.x.a;// 'a' should be of type 'number' 
diff --git a/tests/baselines/reference/constraintsThatReferenceOtherContstraints1.js b/tests/baselines/reference/constraintsThatReferenceOtherContstraints1.js
index 61b6717966b..19fd896c388 100644
--- a/tests/baselines/reference/constraintsThatReferenceOtherContstraints1.js
+++ b/tests/baselines/reference/constraintsThatReferenceOtherContstraints1.js
@@ -20,4 +20,4 @@ var Bar = (function () {
     }
     return Bar;
 })();
-var x;
+var x;// Error 2 Type '{ a: string; b: number; }' does not satisfy the constraint 'T' for type  
diff --git a/tests/baselines/reference/constructorArgWithGenericCallSignature.js b/tests/baselines/reference/constructorArgWithGenericCallSignature.js
index 90eada7cec4..e492ff90b17 100644
--- a/tests/baselines/reference/constructorArgWithGenericCallSignature.js
+++ b/tests/baselines/reference/constructorArgWithGenericCallSignature.js
@@ -29,4 +29,4 @@ var Test;
 })(Test || (Test = {}));
 var func;
 Test.F(func);
-var test = new Test.MyClass(func);
+var test = new Test.MyClass(func);// Should be OK 
diff --git a/tests/baselines/reference/constructorHasPrototypeProperty.js b/tests/baselines/reference/constructorHasPrototypeProperty.js
index 2f0587255b2..7e5fc371807 100644
--- a/tests/baselines/reference/constructorHasPrototypeProperty.js
+++ b/tests/baselines/reference/constructorHasPrototypeProperty.js
@@ -71,8 +71,8 @@ var Generic;
         }
         return D;
     })(C);
-    var r = C.prototype;
-    var ra = r.foo;
-    var r2 = D.prototype;
-    var rb = r2.baz;
+    var r = C.prototype;// C<any, any> 
+    var ra = r.foo;// any 
+    var r2 = D.prototype;// D<any, any> 
+    var rb = r2.baz;// any 
 })(Generic || (Generic = {}));
diff --git a/tests/baselines/reference/constructorParameterProperties.js b/tests/baselines/reference/constructorParameterProperties.js
index 3c1bed9672a..adf8418f9bd 100644
--- a/tests/baselines/reference/constructorParameterProperties.js
+++ b/tests/baselines/reference/constructorParameterProperties.js
@@ -27,7 +27,7 @@ var C = (function () {
 })();
 var c;
 var r = c.y;
-var r2 = c.x;
+var r2 = c.x;// error 
 var D = (function () {
     function D(a, x) {
         this.x = x;
@@ -36,5 +36,5 @@ var D = (function () {
 })();
 var d;
 var r = d.y;
-var r2 = d.x;
-var r3 = d.a;
+var r2 = d.x;// error 
+var r3 = d.a;// error 
diff --git a/tests/baselines/reference/constructorParameterProperties2.js b/tests/baselines/reference/constructorParameterProperties2.js
index 50509b7b3af..28f5e645a64 100644
--- a/tests/baselines/reference/constructorParameterProperties2.js
+++ b/tests/baselines/reference/constructorParameterProperties2.js
@@ -26,7 +26,7 @@ var r3 = e.y; // error
 //// [constructorParameterProperties2.js]
 var C = (function () {
     function C(y) {
-    }
+    }// ok 
     return C;
 })();
 var c;
@@ -34,7 +34,7 @@ var r = c.y;
 var D = (function () {
     function D(y) {
         this.y = y;
-    }
+    }// error 
     return D;
 })();
 var d;
@@ -42,8 +42,8 @@ var r2 = d.y;
 var E = (function () {
     function E(y) {
         this.y = y;
-    }
+    }// error 
     return E;
 })();
 var e;
-var r3 = e.y;
+var r3 = e.y;// error 
diff --git a/tests/baselines/reference/constructorParameterShadowsOuterScopes.js b/tests/baselines/reference/constructorParameterShadowsOuterScopes.js
index ffb2b3e6657..c068f50420a 100644
--- a/tests/baselines/reference/constructorParameterShadowsOuterScopes.js
+++ b/tests/baselines/reference/constructorParameterShadowsOuterScopes.js
@@ -28,7 +28,7 @@ class D {
 var x = 1;
 var C = (function () {
     function C(x) {
-        this.b = x;
+        this.b = x;// error, evaluated in scope of constructor, cannot reference x 
         x = 2;
     }
     return C;
@@ -36,7 +36,7 @@ var C = (function () {
 var y = 1;
 var D = (function () {
     function D(x) {
-        this.b = y;
+        this.b = y;// error, evaluated in scope of constructor, cannot reference y 
         var y = "";
     }
     return D;
diff --git a/tests/baselines/reference/constructorsWithSpecializedSignatures.js b/tests/baselines/reference/constructorsWithSpecializedSignatures.js
index f1c9a13cc75..3893728768a 100644
--- a/tests/baselines/reference/constructorsWithSpecializedSignatures.js
+++ b/tests/baselines/reference/constructorsWithSpecializedSignatures.js
@@ -53,6 +53,6 @@ var D = (function () {
 // overloads are ok
 var D2 = (function () {
     function D2(x) {
-    }
+    }// error 
     return D2;
 })();
diff --git a/tests/baselines/reference/contextualSignatureInstantiation1.js b/tests/baselines/reference/contextualSignatureInstantiation1.js
index ea83871d445..c0ea41b5a44 100644
--- a/tests/baselines/reference/contextualSignatureInstantiation1.js
+++ b/tests/baselines/reference/contextualSignatureInstantiation1.js
@@ -9,6 +9,6 @@ var r100 = map2(e2); // type arg inference should fail for S since a generic lam
 
 //// [contextualSignatureInstantiation1.js]
 var e = function (x, y) { return x.length; };
-var r99 = map(e);
+var r99 = map(e);// should be {}[] for S since a generic lambda is not inferentially typed 
 var e2 = function (x, y) { return x.length; };
-var r100 = map2(e2);
+var r100 = map2(e2);// type arg inference should fail for S since a generic lambda is not inferentially typed. Falls back to { length: number } 
diff --git a/tests/baselines/reference/contextualSignatureInstantiation3.js b/tests/baselines/reference/contextualSignatureInstantiation3.js
index 6db26f49386..43b76bd1211 100644
--- a/tests/baselines/reference/contextualSignatureInstantiation3.js
+++ b/tests/baselines/reference/contextualSignatureInstantiation3.js
@@ -36,8 +36,8 @@ function singleton(x) {
 var xs = [1, 2, 3];
 // Have compiler check that we get the correct types
 var v1;
-var v1 = xs.map(identity);
-var v1 = map(xs, identity);
+var v1 = xs.map(identity);// Error if not number[] 
+var v1 = map(xs, identity);// Error if not number[] 
 var v2;
-var v2 = xs.map(singleton);
-var v2 = map(xs, singleton);
+var v2 = xs.map(singleton);// Error if not number[][] 
+var v2 = map(xs, singleton);// Error if not number[][] 
diff --git a/tests/baselines/reference/contextualSignatureInstantiationWithTypeParameterConstrainedToOuterTypeParameter.js b/tests/baselines/reference/contextualSignatureInstantiationWithTypeParameterConstrainedToOuterTypeParameter.js
index eb6213f381c..e8433486783 100644
--- a/tests/baselines/reference/contextualSignatureInstantiationWithTypeParameterConstrainedToOuterTypeParameter.js
+++ b/tests/baselines/reference/contextualSignatureInstantiationWithTypeParameterConstrainedToOuterTypeParameter.js
@@ -14,4 +14,4 @@ function f() {
     return g;
 }
 var h;
-var x = h("", f());
+var x = h("", f());// Call should succeed and x should be string. All type parameters should be instantiated to string 
diff --git a/tests/baselines/reference/contextualTypingWithFixedTypeParameters1.js b/tests/baselines/reference/contextualTypingWithFixedTypeParameters1.js
index fd9317cec94..1ca2745d52a 100644
--- a/tests/baselines/reference/contextualTypingWithFixedTypeParameters1.js
+++ b/tests/baselines/reference/contextualTypingWithFixedTypeParameters1.js
@@ -6,4 +6,4 @@ var r9 = f10('', () => (a => a.foo), 1); // now a should be any
 //// [contextualTypingWithFixedTypeParameters1.js]
 var f10;
 f10('', function () { return function (a) { return a.foo; }; }, '');
-var r9 = f10('', function () { return (function (a) { return a.foo; }); }, 1);
+var r9 = f10('', function () { return (function (a) { return a.foo; }); }, 1);// now a should be any 
diff --git a/tests/baselines/reference/couldNotSelectGenericOverload.js b/tests/baselines/reference/couldNotSelectGenericOverload.js
index 45b1d6d4558..e5ffd52af85 100644
--- a/tests/baselines/reference/couldNotSelectGenericOverload.js
+++ b/tests/baselines/reference/couldNotSelectGenericOverload.js
@@ -13,9 +13,9 @@ function makeArray(items) {
     return items;
 }
 var b = [1, ""];
-var b1G = makeArray(1, "");
-var b2G = makeArray(b);
+var b1G = makeArray(1, "");// any, no error 
+var b2G = makeArray(b);// any[] 
 function makeArray2(items) {
     return items;
 }
-var b3G = makeArray2(1, "");
+var b3G = makeArray2(1, "");// error 
diff --git a/tests/baselines/reference/declFileInternalAliases.js b/tests/baselines/reference/declFileInternalAliases.js
index c465644fcde..ca460a4c282 100644
--- a/tests/baselines/reference/declFileInternalAliases.js
+++ b/tests/baselines/reference/declFileInternalAliases.js
@@ -25,12 +25,12 @@ var m;
 var m1;
 (function (m1) {
     var x = m.c;
-    m1.d = new x();
+    m1.d = new x();// emit the type as m.c 
 })(m1 || (m1 = {}));
 var m2;
 (function (m2) {
     m2.x = m.c;
-    m2.d = new m2.x();
+    m2.d = new m2.x();// emit the type as x 
 })(m2 || (m2 = {}));
 
 
diff --git a/tests/baselines/reference/declInput-2.js b/tests/baselines/reference/declInput-2.js
index 011167d9a35..747c42cf17e 100644
--- a/tests/baselines/reference/declInput-2.js
+++ b/tests/baselines/reference/declInput-2.js
@@ -46,7 +46,7 @@ var M;
         };
         D.prototype.m252 = function () {
             return null;
-        };
+        };// don't generate 
         D.prototype.m26 = function (i) {
         };
         D.prototype.m262 = function (i) {
diff --git a/tests/baselines/reference/declarationEmit_nameConflicts.js b/tests/baselines/reference/declarationEmit_nameConflicts.js
index 941029774f4..19feee662e6 100644
--- a/tests/baselines/reference/declarationEmit_nameConflicts.js
+++ b/tests/baselines/reference/declarationEmit_nameConflicts.js
@@ -104,11 +104,11 @@ var M = exports.M;
         })(P.N || (P.N = {}));
         var N = P.N;
         P.im = M.P.f;
-        P.a = M.a;
-        P.b = M.b;
-        P.c = M.c;
-        P.g = M.c.g;
-        P.d = M.d;
+        P.a = M.a;// emitted incorrectly as typeof f 
+        P.b = M.b;// ok 
+        P.c = M.c;// ok 
+        P.g = M.c.g;// ok 
+        P.d = M.d;// emitted incorrectly as typeof im 
     })(M.P || (M.P = {}));
     var P = M.P;
 })(exports.M || (exports.M = {}));
diff --git a/tests/baselines/reference/declarationEmit_nameConflicts2.js b/tests/baselines/reference/declarationEmit_nameConflicts2.js
index 79d73add32d..0c88e919cbe 100644
--- a/tests/baselines/reference/declarationEmit_nameConflicts2.js
+++ b/tests/baselines/reference/declarationEmit_nameConflicts2.js
@@ -46,10 +46,10 @@ var X;
     (function (Y) {
         (function (base) {
             (function (Z) {
-                Z.f = X.Y.base.f;
-                Z.C = X.Y.base.C;
-                Z.M = X.Y.base.M;
-                Z.E = X.Y.base.E;
+                Z.f = X.Y.base.f;// Should be base.f 
+                Z.C = X.Y.base.C;// Should be base.C 
+                Z.M = X.Y.base.M;// Should be base.M 
+                Z.E = X.Y.base.E;// Should be base.E 
             })(base.Z || (base.Z = {}));
             var Z = base.Z;
         })(Y.base || (Y.base = {}));
diff --git a/tests/baselines/reference/declarationEmit_nameConflicts3.js b/tests/baselines/reference/declarationEmit_nameConflicts3.js
index daa5bac83d7..bdc7c9aa6b6 100644
--- a/tests/baselines/reference/declarationEmit_nameConflicts3.js
+++ b/tests/baselines/reference/declarationEmit_nameConflicts3.js
@@ -77,10 +77,10 @@ var M;
             D[D["f"] = 0] = "f";
         })(P.D || (P.D = {}));
         var D = P.D;
-        P.v;
-        P.w = M.D.f;
-        P.x = M.C.f;
-        P.x = M.E.f;
+        P.v;// ok 
+        P.w = M.D.f;// error, should be typeof M.D.f 
+        P.x = M.C.f;// error, should be typeof M.C.f 
+        P.x = M.E.f;// error, should be typeof M.E.f 
     })(M.P || (M.P = {}));
     var P = M.P;
 })(M || (M = {}));
diff --git a/tests/baselines/reference/declarationEmit_nameConflictsWithAlias.js b/tests/baselines/reference/declarationEmit_nameConflictsWithAlias.js
index 32ac2d47290..a29b4079b2b 100644
--- a/tests/baselines/reference/declarationEmit_nameConflictsWithAlias.js
+++ b/tests/baselines/reference/declarationEmit_nameConflictsWithAlias.js
@@ -8,7 +8,7 @@ export module M {
 
 //// [declarationEmit_nameConflictsWithAlias.js]
 (function (M) {
-    M.w;
+    M.w;// Gets emitted as C.I, which is the wrong interface 
 })(exports.M || (exports.M = {}));
 var M = exports.M;
 
diff --git a/tests/baselines/reference/defaultArgsInFunctionExpressions.js b/tests/baselines/reference/defaultArgsInFunctionExpressions.js
index 991c45d6973..da223251225 100644
--- a/tests/baselines/reference/defaultArgsInFunctionExpressions.js
+++ b/tests/baselines/reference/defaultArgsInFunctionExpressions.js
@@ -35,7 +35,7 @@ f7().x;
 var f = function (a) {
     if (a === void 0) { a = 3; }
     return a;
-};
+};// Type should be (a?: number) => number 
 var n = f(4);
 n = f();
 var s = f('');
@@ -44,7 +44,7 @@ s = f();
 var f2 = function (a) {
     if (a === void 0) { a = 3; }
     return a;
-};
+};// Should error, but be of type (a: string) => string; 
 s = f2('');
 s = f2();
 n = f2();
diff --git a/tests/baselines/reference/defaultBestCommonTypesHaveDecls.js b/tests/baselines/reference/defaultBestCommonTypesHaveDecls.js
index 8924198b7dc..8b03f32dc8e 100644
--- a/tests/baselines/reference/defaultBestCommonTypesHaveDecls.js
+++ b/tests/baselines/reference/defaultBestCommonTypesHaveDecls.js
@@ -28,4 +28,4 @@ function concat(x, y) {
     return null;
 }
 var result = concat(1, "");
-var elementCount = result.length;
+var elementCount = result.length;// would like to get an error by now 
diff --git a/tests/baselines/reference/derivedClassConstructorWithoutSuperCall.js b/tests/baselines/reference/derivedClassConstructorWithoutSuperCall.js
index 499c4fe8215..ce6f336b960 100644
--- a/tests/baselines/reference/derivedClassConstructorWithoutSuperCall.js
+++ b/tests/baselines/reference/derivedClassConstructorWithoutSuperCall.js
@@ -59,7 +59,7 @@ var Base2 = (function () {
 var Derived2 = (function (_super) {
     __extends(Derived2, _super);
     function Derived2() {
-        var r2 = function () { return _super.call(this); };
+        var r2 = function () { return _super.call(this); };// error for misplaced super call (nested function) 
     }
     return Derived2;
 })(Base2);
@@ -68,14 +68,14 @@ var Derived3 = (function (_super) {
     function Derived3() {
         var r = function () {
             _super.call(this);
-        };
+        }// error // error ;// error 
     }
     return Derived3;
 })(Base2);
 var Derived4 = (function (_super) {
     __extends(Derived4, _super);
     function Derived4() {
-        var r = _super.call(this);
+        var r = _super.call(this);// ok 
     }
     return Derived4;
 })(Base2);
diff --git a/tests/baselines/reference/derivedClassTransitivity.js b/tests/baselines/reference/derivedClassTransitivity.js
index af46f2d23c8..21c6397d4cb 100644
--- a/tests/baselines/reference/derivedClassTransitivity.js
+++ b/tests/baselines/reference/derivedClassTransitivity.js
@@ -41,7 +41,7 @@ var D = (function (_super) {
         _super.apply(this, arguments);
     }
     D.prototype.foo = function () {
-    };
+    };// ok to drop parameters 
     return D;
 })(C);
 var E = (function (_super) {
@@ -50,7 +50,7 @@ var E = (function (_super) {
         _super.apply(this, arguments);
     }
     E.prototype.foo = function (x) {
-    };
+    };// ok to add optional parameters 
     return E;
 })(D);
 var c;
diff --git a/tests/baselines/reference/derivedClassTransitivity2.js b/tests/baselines/reference/derivedClassTransitivity2.js
index a4d2cf8b421..56985a31094 100644
--- a/tests/baselines/reference/derivedClassTransitivity2.js
+++ b/tests/baselines/reference/derivedClassTransitivity2.js
@@ -41,7 +41,7 @@ var D = (function (_super) {
         _super.apply(this, arguments);
     }
     D.prototype.foo = function (x) {
-    };
+    };// ok to drop parameters 
     return D;
 })(C);
 var E = (function (_super) {
@@ -50,7 +50,7 @@ var E = (function (_super) {
         _super.apply(this, arguments);
     }
     E.prototype.foo = function (x, y) {
-    };
+    };// ok to add optional parameters 
     return E;
 })(D);
 var c;
diff --git a/tests/baselines/reference/derivedClassTransitivity3.js b/tests/baselines/reference/derivedClassTransitivity3.js
index a20136f4b25..fe7618f36e5 100644
--- a/tests/baselines/reference/derivedClassTransitivity3.js
+++ b/tests/baselines/reference/derivedClassTransitivity3.js
@@ -41,7 +41,7 @@ var D = (function (_super) {
         _super.apply(this, arguments);
     }
     D.prototype.foo = function (x) {
-    };
+    };// ok to drop parameters 
     return D;
 })(C);
 var E = (function (_super) {
@@ -50,7 +50,7 @@ var E = (function (_super) {
         _super.apply(this, arguments);
     }
     E.prototype.foo = function (x, y) {
-    };
+    };// ok to add optional parameters 
     return E;
 })(D);
 var c;
diff --git a/tests/baselines/reference/derivedClassWithoutExplicitConstructor.js b/tests/baselines/reference/derivedClassWithoutExplicitConstructor.js
index 5b9068256a9..fdfaa93a41e 100644
--- a/tests/baselines/reference/derivedClassWithoutExplicitConstructor.js
+++ b/tests/baselines/reference/derivedClassWithoutExplicitConstructor.js
@@ -48,7 +48,7 @@ var Derived = (function (_super) {
     }
     return Derived;
 })(Base);
-var r = new Derived();
+var r = new Derived();// error 
 var r2 = new Derived(1);
 var Base2 = (function () {
     function Base2(x) {
@@ -65,5 +65,5 @@ var D = (function (_super) {
     }
     return D;
 })(Base2);
-var d = new D();
-var d2 = new D(new Date());
+var d = new D();// error 
+var d2 = new D(new Date());// ok 
diff --git a/tests/baselines/reference/derivedClassWithoutExplicitConstructor2.js b/tests/baselines/reference/derivedClassWithoutExplicitConstructor2.js
index 06ca55acb3e..5f6d6f88b0b 100644
--- a/tests/baselines/reference/derivedClassWithoutExplicitConstructor2.js
+++ b/tests/baselines/reference/derivedClassWithoutExplicitConstructor2.js
@@ -56,7 +56,7 @@ var Derived = (function (_super) {
     }
     return Derived;
 })(Base);
-var r = new Derived();
+var r = new Derived();// error 
 var r2 = new Derived(1);
 var r3 = new Derived(1, 2);
 var r4 = new Derived(1, 2, 3);
@@ -75,7 +75,7 @@ var D = (function (_super) {
     }
     return D;
 })(Base2);
-var d = new D();
-var d2 = new D(new Date());
+var d = new D();// error 
+var d2 = new D(new Date());// ok 
 var d3 = new D(new Date(), new Date());
 var d4 = new D(new Date(), new Date(), new Date());
diff --git a/tests/baselines/reference/derivedClassWithoutExplicitConstructor3.js b/tests/baselines/reference/derivedClassWithoutExplicitConstructor3.js
index 3037443e5af..7a08caf6126 100644
--- a/tests/baselines/reference/derivedClassWithoutExplicitConstructor3.js
+++ b/tests/baselines/reference/derivedClassWithoutExplicitConstructor3.js
@@ -79,8 +79,8 @@ var Derived2 = (function (_super) {
     }
     return Derived2;
 })(Derived);
-var r = new Derived();
-var r2 = new Derived2(1);
+var r = new Derived();// error 
+var r2 = new Derived2(1);// error 
 var r3 = new Derived('', '');
 var Base2 = (function () {
     function Base2(x) {
@@ -106,6 +106,6 @@ var D2 = (function (_super) {
     }
     return D2;
 })(D);
-var d = new D2();
-var d2 = new D2(new Date());
-var d3 = new D2(new Date(), new Date());
+var d = new D2();// error 
+var d2 = new D2(new Date());// error 
+var d3 = new D2(new Date(), new Date());// ok 
diff --git a/tests/baselines/reference/derivedTypeAccessesHiddenBaseCallViaSuperPropertyAccess.js b/tests/baselines/reference/derivedTypeAccessesHiddenBaseCallViaSuperPropertyAccess.js
index 7873bf11c3e..cb6e7e83e4a 100644
--- a/tests/baselines/reference/derivedTypeAccessesHiddenBaseCallViaSuperPropertyAccess.js
+++ b/tests/baselines/reference/derivedTypeAccessesHiddenBaseCallViaSuperPropertyAccess.js
@@ -41,9 +41,9 @@ var Derived = (function (_super) {
         return null;
     };
     Derived.prototype.bar = function () {
-        var r = _super.prototype.foo.call(this, { a: 1 });
-        var r2 = _super.prototype.foo.call(this, { a: 1, b: 2 });
-        var r3 = this.foo({ a: 1, b: 2 });
+        var r = _super.prototype.foo.call(this, { a: 1 });// { a: number } 
+        var r2 = _super.prototype.foo.call(this, { a: 1, b: 2 });// { a: number } 
+        var r3 = this.foo({ a: 1, b: 2 });// { a: number; b: number; } 
     };
     return Derived;
 })(Base);
diff --git a/tests/baselines/reference/doNotWidenAtObjectLiteralPropertyAssignment.js b/tests/baselines/reference/doNotWidenAtObjectLiteralPropertyAssignment.js
index 07fa97fae79..92db09c94cf 100644
--- a/tests/baselines/reference/doNotWidenAtObjectLiteralPropertyAssignment.js
+++ b/tests/baselines/reference/doNotWidenAtObjectLiteralPropertyAssignment.js
@@ -12,4 +12,4 @@ var test: IIntervalTreeNode[] = [{ interval: { begin: 0 }, children: null }]; //
 
 
 //// [doNotWidenAtObjectLiteralPropertyAssignment.js]
-var test = [{ interval: { begin: 0 }, children: null }];
+var test = [{ interval: { begin: 0 }, children: null }];// was error here because best common type is {} 
diff --git a/tests/baselines/reference/dottedSymbolResolution1.js b/tests/baselines/reference/dottedSymbolResolution1.js
index 369d9336d9f..aafaf45c496 100644
--- a/tests/baselines/reference/dottedSymbolResolution1.js
+++ b/tests/baselines/reference/dottedSymbolResolution1.js
@@ -39,6 +39,6 @@ function each(collection, callback) {
 function _setBarAndText() {
     var x, $;
     each(x.find(" "), function () {
-        var $this = $(''), thisBar = $this.find(".fx-usagebars-calloutbar-this");
+        var $this = $(''), thisBar = $this.find(".fx-usagebars-calloutbar-this");// bug lead to 'could not find dotted symbol' here 
     });
 }
diff --git a/tests/baselines/reference/duplicateIdentifierInCatchBlock.js b/tests/baselines/reference/duplicateIdentifierInCatchBlock.js
index b961fa64df6..d788b72efbf 100644
--- a/tests/baselines/reference/duplicateIdentifierInCatchBlock.js
+++ b/tests/baselines/reference/duplicateIdentifierInCatchBlock.js
@@ -37,9 +37,9 @@ try {
 catch (e) {
     var x;
     function x() {
-    }
+    }// error 
     function e() {
-    }
-    var p;
+    }// error 
     var p;
+    var p;// error 
 }
diff --git a/tests/baselines/reference/duplicateIdentifiersAcrossContainerBoundaries.js b/tests/baselines/reference/duplicateIdentifiersAcrossContainerBoundaries.js
index c2529b2e037..4f936e528e6 100644
--- a/tests/baselines/reference/duplicateIdentifiersAcrossContainerBoundaries.js
+++ b/tests/baselines/reference/duplicateIdentifiersAcrossContainerBoundaries.js
@@ -60,7 +60,7 @@ var M;
         }
         return I;
     })();
-    M.I = I;
+    M.I = I;// error 
 })(M || (M = {}));
 var M;
 (function (M) {
@@ -75,7 +75,7 @@ var M;
         }
         return f;
     })();
-    M.f = f;
+    M.f = f;// error 
 })(M || (M = {}));
 var M;
 (function (M) {
@@ -89,7 +89,7 @@ var M;
         }
         return g;
     })();
-    M.g = g;
+    M.g = g;// no error 
 })(M || (M = {}));
 var M;
 (function (M) {
@@ -103,7 +103,7 @@ var M;
 var M;
 (function (M) {
     function C() {
-    }
+    }// no error 
 })(M || (M = {}));
 var M;
 (function (M) {
@@ -111,7 +111,7 @@ var M;
 })(M || (M = {}));
 var M;
 (function (M) {
-    M.v = 3;
+    M.v = 3;// error for redeclaring var in a different parent 
 })(M || (M = {}));
 var Foo = (function () {
     function Foo() {
@@ -120,7 +120,7 @@ var Foo = (function () {
 })();
 var Foo;
 (function (Foo) {
-    Foo.x;
+    Foo.x;// error for redeclaring var in a different parent 
 })(Foo || (Foo = {}));
 var N;
 (function (N) {
diff --git a/tests/baselines/reference/duplicateSymbolsExportMatching.js b/tests/baselines/reference/duplicateSymbolsExportMatching.js
index f3dd4a8351c..8a5c8873b4a 100644
--- a/tests/baselines/reference/duplicateSymbolsExportMatching.js
+++ b/tests/baselines/reference/duplicateSymbolsExportMatching.js
@@ -83,9 +83,9 @@ define(["require", "exports"], function (require, exports) {
     var M2;
     (function (M2) {
         var v;
-        M2.v;
+        M2.v;// one error (visibility) 
         var w;
-        M2.w;
+        M2.w;// two errors (visibility and type mismatch) 
     })(M2 || (M2 = {}));
     var M;
     (function (M) {
@@ -95,7 +95,7 @@ define(["require", "exports"], function (require, exports) {
         })(F || (F = {}));
         function F() {
         }
-        M.F = F;
+        M.F = F;// Only one error for duplicate identifier (don't consider visibility) 
     })(M || (M = {}));
     var M;
     (function (M) {
diff --git a/tests/baselines/reference/duplicateVariablesWithAny.js b/tests/baselines/reference/duplicateVariablesWithAny.js
index c21bef01770..3afaa87e63f 100644
--- a/tests/baselines/reference/duplicateVariablesWithAny.js
+++ b/tests/baselines/reference/duplicateVariablesWithAny.js
@@ -20,15 +20,15 @@ var z; // ok
 //// [duplicateVariablesWithAny.js]
 // They should have to be the same even when one of the types is 'any'
 var x;
-var x = 2;
+var x = 2;//error 
 var y = "";
-var y;
+var y;//error 
 var N;
 (function (N) {
     var x;
-    var x = 2;
+    var x = 2;//error 
     var y = "";
-    var y;
+    var y;//error 
 })(N || (N = {}));
 var z;
-var z;
+var z;// ok 
diff --git a/tests/baselines/reference/emptyIndexer.js b/tests/baselines/reference/emptyIndexer.js
index 8e3abd0cab4..bca45065588 100644
--- a/tests/baselines/reference/emptyIndexer.js
+++ b/tests/baselines/reference/emptyIndexer.js
@@ -14,4 +14,4 @@ var n = x[''].m(); // should not crash compiler
 
 //// [emptyIndexer.js]
 var x;
-var n = x[''].m();
+var n = x[''].m();// should not crash compiler 
diff --git a/tests/baselines/reference/enumAssignability.js b/tests/baselines/reference/enumAssignability.js
index f602829eaf8..635252161e3 100644
--- a/tests/baselines/reference/enumAssignability.js
+++ b/tests/baselines/reference/enumAssignability.js
@@ -70,11 +70,11 @@ e = f;
 f = e;
 e = 1;
 f = 1;
-var x = e;
+var x = e;// ok 
 x = f;
 var Others;
 (function (Others) {
-    var a = e;
+    var a = e;// ok 
     var C = (function () {
         function C() {
         }
@@ -82,11 +82,11 @@ var Others;
     })();
     var ac;
     var ai;
-    var b = e;
+    var b = e;// ok 
     var c = e;
     var d = e;
     var ee = e;
-    var f = e;
+    var f = e;// ok 
     var g = e;
     var h = e;
     var i = e;
diff --git a/tests/baselines/reference/enumAssignabilityInInheritance.js b/tests/baselines/reference/enumAssignabilityInInheritance.js
index 5d44c28bde9..0b4b10117d5 100644
--- a/tests/baselines/reference/enumAssignabilityInInheritance.js
+++ b/tests/baselines/reference/enumAssignabilityInInheritance.js
@@ -115,9 +115,9 @@ var E;
 (function (E) {
     E[E["A"] = 0] = "A";
 })(E || (E = {}));
-var r = foo(0 /* A */);
-var r2 = foo(1);
-var r3 = foo(null);
+var r = foo(0 /* A */);// E 
+var r2 = foo(1);// number 
+var r3 = foo(null);// any 
 var r4 = foo2(0 /* A */);
 var r4 = foo3(0 /* A */);
 var r4 = foo4(0 /* A */);
diff --git a/tests/baselines/reference/enumAssignmentCompat.js b/tests/baselines/reference/enumAssignmentCompat.js
index f7fb01ff69c..b3abf80d146 100644
--- a/tests/baselines/reference/enumAssignmentCompat.js
+++ b/tests/baselines/reference/enumAssignmentCompat.js
@@ -56,14 +56,14 @@ var W;
 })(W || (W = {}));
 var x = W;
 var y = W;
-var z = W;
+var z = W;// error 
 var a = 0 /* a */;
-var b = 0 /* a */;
+var b = 0 /* a */;// error 
 var c = 0 /* a */;
-var d = 3;
+var d = 3;// error 
 var e = 4;
-var f = 0 /* a */;
-var g = 5;
+var f = 0 /* a */;// error 
+var g = 5;// error 
 var h = 3;
 var i = 0 /* a */;
 i = 0 /* a */;
diff --git a/tests/baselines/reference/enumAssignmentCompat2.js b/tests/baselines/reference/enumAssignmentCompat2.js
index 41ac87e1587..e066633c9a2 100644
--- a/tests/baselines/reference/enumAssignmentCompat2.js
+++ b/tests/baselines/reference/enumAssignmentCompat2.js
@@ -55,14 +55,14 @@ var W;
 })(W || (W = {}));
 var x = W;
 var y = W;
-var z = W;
+var z = W;// error 
 var a = 0 /* a */;
-var b = 0 /* a */;
+var b = 0 /* a */;// error 
 var c = 0 /* a */;
-var d = 3;
+var d = 3;// error 
 var e = 4;
-var f = 0 /* a */;
-var g = 5;
+var f = 0 /* a */;// error 
+var g = 5;// error 
 var h = 3;
 var i = 0 /* a */;
 i = 0 /* a */;
diff --git a/tests/baselines/reference/enumBasics.js b/tests/baselines/reference/enumBasics.js
index 45a393be502..a9d593e5502 100644
--- a/tests/baselines/reference/enumBasics.js
+++ b/tests/baselines/reference/enumBasics.js
@@ -123,13 +123,13 @@ var E5;
 (function (E5) {
     E5[E5["A"] = 0] = "A";
     E5[E5["B"] = 3] = "B";
-    E5[E5["C"] = 4] = "C";
+    E5[E5["C"] = 4] = "C";// 4 
 })(E5 || (E5 = {}));
 var E6;
 (function (E6) {
     E6[E6["A"] = 0] = "A";
     E6[E6["B"] = 0] = "B";
-    E6[E6["C"] = 1] = "C";
+    E6[E6["C"] = 1] = "C";// 1 
 })(E6 || (E6 = {}));
 // Enum with computed member initializer of type 'any'
 var E7;
diff --git a/tests/baselines/reference/enumIndexer.js b/tests/baselines/reference/enumIndexer.js
index b2b72441211..161214ecf20 100644
--- a/tests/baselines/reference/enumIndexer.js
+++ b/tests/baselines/reference/enumIndexer.js
@@ -15,4 +15,4 @@ var MyEnumType;
 })(MyEnumType || (MyEnumType = {}));
 var _arr = [{ key: 'foo' }, { key: 'bar' }];
 var enumValue = 0 /* foo */;
-var x = _arr.map(function (o) { return MyEnumType[o.key] === enumValue; });
+var x = _arr.map(function (o) { return MyEnumType[o.key] === enumValue; });// these are not same type 
diff --git a/tests/baselines/reference/enumNumbering1.js b/tests/baselines/reference/enumNumbering1.js
index 40bf821a088..ca4d03f75f2 100644
--- a/tests/baselines/reference/enumNumbering1.js
+++ b/tests/baselines/reference/enumNumbering1.js
@@ -15,5 +15,5 @@ var Test;
     Test[Test["B"] = 1] = "B";
     Test[Test["C"] = Math.floor(Math.random() * 1000)] = "C";
     Test[Test["D"] = 10] = "D";
-    Test[Test["E"] = 11] = "E";
+    Test[Test["E"] = 11] = "E";// Error but shouldn't be 
 })(Test || (Test = {}));
diff --git a/tests/baselines/reference/enumPropertyAccess.js b/tests/baselines/reference/enumPropertyAccess.js
index c0346dc547c..5001dc75264 100644
--- a/tests/baselines/reference/enumPropertyAccess.js
+++ b/tests/baselines/reference/enumPropertyAccess.js
@@ -20,8 +20,8 @@ var Colors;
     Colors[Colors["Red"] = 0] = "Red";
     Colors[Colors["Green"] = 1] = "Green";
 })(Colors || (Colors = {}));
-var x = 0 /* Red */;
-var p = x.Green;
+var x = 0 /* Red */;// type of 'x' should be 'Colors' 
+var p = x.Green;// error 
 x.toFixed();
 // Now with generics
 function fill(f) {
diff --git a/tests/baselines/reference/errorOnContextuallyTypedReturnType.js b/tests/baselines/reference/errorOnContextuallyTypedReturnType.js
index 45e92ab5099..d8ad349e02f 100644
--- a/tests/baselines/reference/errorOnContextuallyTypedReturnType.js
+++ b/tests/baselines/reference/errorOnContextuallyTypedReturnType.js
@@ -5,6 +5,6 @@ var n2: () => boolean = function ():boolean { }; // expect an error here
 
 //// [errorOnContextuallyTypedReturnType.js]
 var n1 = function () {
-};
+};// expect an error here 
 var n2 = function () {
-};
+};// expect an error here 
diff --git a/tests/baselines/reference/es6MemberScoping.js b/tests/baselines/reference/es6MemberScoping.js
index 6cfdef9e743..f5c5ddf8d19 100644
--- a/tests/baselines/reference/es6MemberScoping.js
+++ b/tests/baselines/reference/es6MemberScoping.js
@@ -20,7 +20,7 @@ class Foo2 {
 //// [es6MemberScoping.js]
 var Foo = (function () {
     function Foo(store) {
-        this._store = store;
+        this._store = store;// should be an error. 
     }
     Foo.prototype.foo = function () {
         return this._store.length;
@@ -32,6 +32,6 @@ var Foo2 = (function () {
     }
     Foo2.Foo2 = function () {
         return 0;
-    };
+    };// should not be an error 
     return Foo2;
 })();
diff --git a/tests/baselines/reference/exportAssignedTypeAsTypeAnnotation.js b/tests/baselines/reference/exportAssignedTypeAsTypeAnnotation.js
index 71ca42ca9de..c25204f7156 100644
--- a/tests/baselines/reference/exportAssignedTypeAsTypeAnnotation.js
+++ b/tests/baselines/reference/exportAssignedTypeAsTypeAnnotation.js
@@ -19,5 +19,5 @@ define(["require", "exports"], function (require, exports) {
 });
 //// [exportAssignedTypeAsTypeAnnotation_1.js]
 define(["require", "exports"], function (require, exports) {
-    var t2;
+    var t2;// should not raise a 'container type' error 
 });
diff --git a/tests/baselines/reference/exportAssignmentConstrainedGenericType.js b/tests/baselines/reference/exportAssignmentConstrainedGenericType.js
index b7223d84f59..6a1c6414754 100644
--- a/tests/baselines/reference/exportAssignmentConstrainedGenericType.js
+++ b/tests/baselines/reference/exportAssignmentConstrainedGenericType.js
@@ -23,6 +23,6 @@ var Foo = (function () {
 module.exports = Foo;
 //// [foo_1.js]
 var foo = require("./foo_0");
-var x = new foo(true);
-var y = new foo({ a: "test", b: 42 });
+var x = new foo(true);// Should error 
+var y = new foo({ a: "test", b: 42 });// Should be OK 
 var z = y.test.b;
diff --git a/tests/baselines/reference/exportAssignmentOfDeclaredExternalModule.js b/tests/baselines/reference/exportAssignmentOfDeclaredExternalModule.js
index 3a6f9022f77..5e7a2ceec90 100644
--- a/tests/baselines/reference/exportAssignmentOfDeclaredExternalModule.js
+++ b/tests/baselines/reference/exportAssignmentOfDeclaredExternalModule.js
@@ -18,8 +18,8 @@ var b = z(); // call signature - no error
 
 //// [exportAssignmentOfDeclaredExternalModule_0.js]
 //// [exportAssignmentOfDeclaredExternalModule_1.js]
-var x = new Sammy();
-var y = Sammy();
-var z;
-var a = new z();
-var b = z();
+var x = new Sammy();// error to use as constructor as there is not constructor symbol 
+var y = Sammy();// error to use interface name as call target 
+var z;// no error - z is of type interface Sammy from module 'M' 
+var a = new z();// constructor - no error 
+var b = z();// call signature - no error 
diff --git a/tests/baselines/reference/exportPrivateType.js b/tests/baselines/reference/exportPrivateType.js
index ad34855a97b..5f638f3a05e 100644
--- a/tests/baselines/reference/exportPrivateType.js
+++ b/tests/baselines/reference/exportPrivateType.js
@@ -52,4 +52,4 @@ var foo;
     foo.g;
     foo.h;
 })(foo || (foo = {}));
-var y = foo.g;
+var y = foo.g;// Exported variable 'y' has or is using private type 'foo.C2'. 
diff --git a/tests/baselines/reference/extendNonClassSymbol1.js b/tests/baselines/reference/extendNonClassSymbol1.js
index cb1f6f82419..e72524fdf1a 100644
--- a/tests/baselines/reference/extendNonClassSymbol1.js
+++ b/tests/baselines/reference/extendNonClassSymbol1.js
@@ -24,4 +24,4 @@ var C = (function (_super) {
         _super.apply(this, arguments);
     }
     return C;
-})(x);
+})(x);// error, could not find symbol xs 
diff --git a/tests/baselines/reference/extendNonClassSymbol2.js b/tests/baselines/reference/extendNonClassSymbol2.js
index 7321df4cd88..a0b7b1cc42d 100644
--- a/tests/baselines/reference/extendNonClassSymbol2.js
+++ b/tests/baselines/reference/extendNonClassSymbol2.js
@@ -15,11 +15,11 @@ var __extends = this.__extends || function (d, b) {
 function Foo() {
     this.x = 1;
 }
-var x = new Foo();
+var x = new Foo();// legal, considered a constructor function 
 var C = (function (_super) {
     __extends(C, _super);
     function C() {
         _super.apply(this, arguments);
     }
     return C;
-})(Foo);
+})(Foo);// error, could not find symbol Foo 
diff --git a/tests/baselines/reference/externalModuleExportingGenericClass.js b/tests/baselines/reference/externalModuleExportingGenericClass.js
index 80e4f7bc66c..de803d0c59a 100644
--- a/tests/baselines/reference/externalModuleExportingGenericClass.js
+++ b/tests/baselines/reference/externalModuleExportingGenericClass.js
@@ -24,6 +24,6 @@ var C = (function () {
 module.exports = C;
 //// [externalModuleExportingGenericClass_file1.js]
 var a = require('externalModuleExportingGenericClass_file0');
-var v;
+var v;// this should report error 
 var v2 = (new a()).foo;
 var v3 = (new a()).foo;
diff --git a/tests/baselines/reference/funClodule.js b/tests/baselines/reference/funClodule.js
index c4b7d6e7a26..6f3818e2312 100644
--- a/tests/baselines/reference/funClodule.js
+++ b/tests/baselines/reference/funClodule.js
@@ -32,4 +32,4 @@ var foo3 = (function () {
     function foo3() {
     }
     return foo3;
-})();
+})();// Should error 
diff --git a/tests/baselines/reference/functionConstraintSatisfaction2.js b/tests/baselines/reference/functionConstraintSatisfaction2.js
index c5ea8106b12..ee31f41f977 100644
--- a/tests/baselines/reference/functionConstraintSatisfaction2.js
+++ b/tests/baselines/reference/functionConstraintSatisfaction2.js
@@ -69,7 +69,7 @@ var r = foo2(new Function());
 var r2 = foo2(function (x) { return x; });
 var r6 = foo2(C);
 var r7 = foo2(b);
-var r8 = foo2(function (x) { return x; });
+var r8 = foo2(function (x) { return x; });// no error expected 
 var r11 = foo2(function (x, y) { return x; });
 var r13 = foo2(C2);
 var r14 = foo2(b2);
diff --git a/tests/baselines/reference/functionSignatureAssignmentCompat1.js b/tests/baselines/reference/functionSignatureAssignmentCompat1.js
index 413f78ca9fa..49649633b96 100644
--- a/tests/baselines/reference/functionSignatureAssignmentCompat1.js
+++ b/tests/baselines/reference/functionSignatureAssignmentCompat1.js
@@ -13,6 +13,6 @@ var e: ParserFunc = parsers.readline(); // ok
 
 //// [functionSignatureAssignmentCompat1.js]
 var parsers;
-var c = parsers.raw;
-var d = parsers.readline;
-var e = parsers.readline();
+var c = parsers.raw;// ok! 
+var d = parsers.readline;// not ok 
+var e = parsers.readline();// ok 
diff --git a/tests/baselines/reference/funduleUsedAcrossFileBoundary.js b/tests/baselines/reference/funduleUsedAcrossFileBoundary.js
index e2fe34248d8..00d4ce77f45 100644
--- a/tests/baselines/reference/funduleUsedAcrossFileBoundary.js
+++ b/tests/baselines/reference/funduleUsedAcrossFileBoundary.js
@@ -17,5 +17,5 @@ function promiseWithCancellation<T>(promise: Q.Promise<T>) {
 //// [funduleUsedAcrossFileBoundary_file1.js]
 //// [funduleUsedAcrossFileBoundary_file2.js]
 function promiseWithCancellation(promise) {
-    var deferred = Q.defer();
+    var deferred = Q.defer();// used to be an error 
 }
diff --git a/tests/baselines/reference/genericArrayAssignmentCompatErrors.js b/tests/baselines/reference/genericArrayAssignmentCompatErrors.js
index 57dac3cd6f2..100344d1b8c 100644
--- a/tests/baselines/reference/genericArrayAssignmentCompatErrors.js
+++ b/tests/baselines/reference/genericArrayAssignmentCompatErrors.js
@@ -25,7 +25,7 @@ myCars3 = myCars5;
 var myCars = new Array();
 var myCars2 = new [];
 var myCars3 = new Array({});
-var myCars4;
+var myCars4;// error 
 var myCars5;
 myCars = myCars2;
 myCars = myCars3;
diff --git a/tests/baselines/reference/genericArrayMethods1.js b/tests/baselines/reference/genericArrayMethods1.js
index c8f3e3a46c6..742d9c24eeb 100644
--- a/tests/baselines/reference/genericArrayMethods1.js
+++ b/tests/baselines/reference/genericArrayMethods1.js
@@ -3,4 +3,4 @@ var x:string[] =  [0,1].slice(0); // this should be an error
 
 
 //// [genericArrayMethods1.js]
-var x = [0, 1].slice(0);
+var x = [0, 1].slice(0);// this should be an error 
diff --git a/tests/baselines/reference/genericCallSpecializedToTypeArg.js b/tests/baselines/reference/genericCallSpecializedToTypeArg.js
index c42e5e820fd..6a14f74d0d2 100644
--- a/tests/baselines/reference/genericCallSpecializedToTypeArg.js
+++ b/tests/baselines/reference/genericCallSpecializedToTypeArg.js
@@ -14,7 +14,7 @@ function dupe(x) {
     return x;
 }
 function dupeAndGetDist(x) {
-    var y = dupe(x);
+    var y = dupe(x);//<-- dupe has incorrect type here 
     y.getDist();
     return y;
 }
diff --git a/tests/baselines/reference/genericCallTypeArgumentInference.js b/tests/baselines/reference/genericCallTypeArgumentInference.js
index bfbfa291f0e..b80db4b36bd 100644
--- a/tests/baselines/reference/genericCallTypeArgumentInference.js
+++ b/tests/baselines/reference/genericCallTypeArgumentInference.js
@@ -96,7 +96,7 @@ var r11 = i.foo8(); // {}
 function foo(t) {
     return t;
 }
-var r = foo('');
+var r = foo('');// string 
 function foo2(t, u) {
     return u;
 }
@@ -104,8 +104,8 @@ function foo2b(u) {
     var x;
     return x;
 }
-var r2 = foo2('', 1);
-var r3 = foo2b(1);
+var r2 = foo2('', 1);// number 
+var r3 = foo2b(1);// {} 
 var C = (function () {
     function C(t, u) {
         this.t = t;
@@ -141,20 +141,20 @@ var C = (function () {
     return C;
 })();
 var c = new C('', 1);
-var r4 = c.foo('', 1);
-var r5 = c.foo2('', 1);
-var r6 = c.foo3(true, 1);
-var r7 = c.foo4('', true);
-var r8 = c.foo5(true, 1);
-var r9 = c.foo6();
-var r10 = c.foo7('');
-var r11 = c.foo8();
+var r4 = c.foo('', 1);// string 
+var r5 = c.foo2('', 1);// number 
+var r6 = c.foo3(true, 1);// boolean 
+var r7 = c.foo4('', true);// string 
+var r8 = c.foo5(true, 1);// boolean 
+var r9 = c.foo6();// {} 
+var r10 = c.foo7('');// {} 
+var r11 = c.foo8();// {} 
 var i;
-var r4 = i.foo('', 1);
-var r5 = i.foo2('', 1);
-var r6 = i.foo3(true, 1);
-var r7 = i.foo4('', true);
-var r8 = i.foo5(true, 1);
-var r9 = i.foo6();
-var r10 = i.foo7('');
-var r11 = i.foo8();
+var r4 = i.foo('', 1);// string 
+var r5 = i.foo2('', 1);// number 
+var r6 = i.foo3(true, 1);// boolean 
+var r7 = i.foo4('', true);// string 
+var r8 = i.foo5(true, 1);// boolean 
+var r9 = i.foo6();// {} 
+var r10 = i.foo7('');// {} 
+var r11 = i.foo8();// {} 
diff --git a/tests/baselines/reference/genericCallWithArrayLiteralArgs.js b/tests/baselines/reference/genericCallWithArrayLiteralArgs.js
index 9f3619a66ba..828228103ee 100644
--- a/tests/baselines/reference/genericCallWithArrayLiteralArgs.js
+++ b/tests/baselines/reference/genericCallWithArrayLiteralArgs.js
@@ -17,11 +17,11 @@ var r6 = foo<Object[]>([1, '']); // Object[]
 function foo(t) {
     return t;
 }
-var r = foo([1, 2]);
-var r = foo([1, 2]);
-var ra = foo([1, 2]);
-var r2 = foo([]);
-var r3 = foo([]);
-var r4 = foo([1, '']);
-var r5 = foo([1, '']);
-var r6 = foo([1, '']);
+var r = foo([1, 2]);// number[] 
+var r = foo([1, 2]);// number[] 
+var ra = foo([1, 2]);// any[] 
+var r2 = foo([]);// any[] 
+var r3 = foo([]);// number[] 
+var r4 = foo([1, '']);// {}[] 
+var r5 = foo([1, '']);// any[] 
+var r6 = foo([1, '']);// Object[] 
diff --git a/tests/baselines/reference/genericCallWithConstraintsTypeArgumentInference.js b/tests/baselines/reference/genericCallWithConstraintsTypeArgumentInference.js
index 2b41b52ae1a..c4079a374a3 100644
--- a/tests/baselines/reference/genericCallWithConstraintsTypeArgumentInference.js
+++ b/tests/baselines/reference/genericCallWithConstraintsTypeArgumentInference.js
@@ -140,8 +140,8 @@ var d2;
 function foo(t) {
     return t;
 }
-var r = foo(b);
-var r2 = foo(d1);
+var r = foo(b);// Base 
+var r2 = foo(d1);// Derived 
 function foo2(t, u) {
     return u;
 }
@@ -153,8 +153,8 @@ function foo2c() {
     var x;
     return x;
 }
-var r3 = foo2b(d1);
-var r3b = foo2c();
+var r3 = foo2b(d1);// Base 
+var r3b = foo2c();// Base 
 var C = (function () {
     function C(t, u) {
         this.t = t;
@@ -190,22 +190,22 @@ var C = (function () {
     return C;
 })();
 var c = new C(b, d1);
-var r4 = c.foo(d1, d2);
-var r5 = c.foo2(b, d2);
-var r6 = c.foo3(d1, d1);
-var r7 = c.foo4(d1, d2);
-var r8 = c.foo5(d1, d2);
-var r8b = c.foo5(d2, d2);
-var r9 = c.foo6();
-var r10 = c.foo7(d1);
-var r11 = c.foo8();
+var r4 = c.foo(d1, d2);// Base 
+var r5 = c.foo2(b, d2);// Derived 
+var r6 = c.foo3(d1, d1);// Derived 
+var r7 = c.foo4(d1, d2);// Base 
+var r8 = c.foo5(d1, d2);// Derived 
+var r8b = c.foo5(d2, d2);// Derived2 
+var r9 = c.foo6();// Derived 
+var r10 = c.foo7(d1);// Base 
+var r11 = c.foo8();// Base 
 var i;
-var r4 = i.foo(d1, d2);
-var r5 = i.foo2(b, d2);
-var r6 = i.foo3(d1, d1);
-var r7 = i.foo4(d1, d2);
-var r8 = i.foo5(d1, d2);
-var r8b = i.foo5(d2, d2);
-var r9 = i.foo6();
-var r10 = i.foo7(d1);
-var r11 = i.foo8();
+var r4 = i.foo(d1, d2);// Base 
+var r5 = i.foo2(b, d2);// Derived 
+var r6 = i.foo3(d1, d1);// Derived 
+var r7 = i.foo4(d1, d2);// Base 
+var r8 = i.foo5(d1, d2);// Derived 
+var r8b = i.foo5(d2, d2);// Derived2 
+var r9 = i.foo6();// Derived 
+var r10 = i.foo7(d1);// Base 
+var r11 = i.foo8();// Base 
diff --git a/tests/baselines/reference/genericCallWithConstraintsTypeArgumentInference2.js b/tests/baselines/reference/genericCallWithConstraintsTypeArgumentInference2.js
index d4d71a36f1b..2b0e07b0a0e 100644
--- a/tests/baselines/reference/genericCallWithConstraintsTypeArgumentInference2.js
+++ b/tests/baselines/reference/genericCallWithConstraintsTypeArgumentInference2.js
@@ -18,8 +18,8 @@ function foo(t) {
     var u;
     return u;
 }
-var r = foo(1);
-var r2 = foo(null);
-var r3 = foo(new Object());
-var r4 = foo(1);
-var r5 = foo(new Date());
+var r = foo(1);// ok 
+var r2 = foo(null);// {} 
+var r3 = foo(new Object());// {} 
+var r4 = foo(1);// error 
+var r5 = foo(new Date());// no error 
diff --git a/tests/baselines/reference/genericCallWithConstructorTypedArguments5.js b/tests/baselines/reference/genericCallWithConstructorTypedArguments5.js
index 3115f4f8201..bad01f79470 100644
--- a/tests/baselines/reference/genericCallWithConstructorTypedArguments5.js
+++ b/tests/baselines/reference/genericCallWithConstructorTypedArguments5.js
@@ -31,18 +31,18 @@ function foo(arg) {
     return new arg.cb(null);
 }
 var arg;
-var r = foo(arg);
+var r = foo(arg);// {} 
 // more args not allowed
 var arg2;
-var r2 = foo(arg2);
+var r2 = foo(arg2);// error 
 var arg3;
-var r3 = foo(arg3);
+var r3 = foo(arg3);// error 
 function foo2(arg) {
     return new arg.cb(null, null);
 }
 // fewer args ok
-var r4 = foo(arg);
+var r4 = foo(arg);// {} 
 var arg4;
-var r6 = foo(arg4);
+var r6 = foo(arg4);// string 
 var arg5;
-var r7 = foo(arg5);
+var r7 = foo(arg5);// string 
diff --git a/tests/baselines/reference/genericCallWithFunctionTypedArguments.js b/tests/baselines/reference/genericCallWithFunctionTypedArguments.js
index 3fc134d67f4..a5ab44b43ca 100644
--- a/tests/baselines/reference/genericCallWithFunctionTypedArguments.js
+++ b/tests/baselines/reference/genericCallWithFunctionTypedArguments.js
@@ -42,31 +42,31 @@ function other<T, U>(t: T, u: U) {
 function foo(x) {
     return x(null);
 }
-var r = foo(function (x) { return ''; });
-var r2 = foo(function (x) { return ''; });
-var r3 = foo(function (x) { return ''; });
+var r = foo(function (x) { return ''; });// {} 
+var r2 = foo(function (x) { return ''; });// string  
+var r3 = foo(function (x) { return ''; });// {} 
 function foo2(x, cb) {
     return cb(x);
 }
 var r4 = foo2(1, function (a) {
     return '';
-});
-var r5 = foo2(1, function (a) { return ''; });
+});// string, contextual signature instantiation is applied to generic functions 
+var r5 = foo2(1, function (a) { return ''; });// string 
 var r6 = foo2('', function (a) { return 1; });
 function foo3(x, cb, y) {
     return cb(x);
 }
-var r7 = foo3(1, function (a) { return ''; }, '');
+var r7 = foo3(1, function (a) { return ''; }, '');// string 
 var r8 = foo3(1, function (a) {
     return '';
-}, 1);
-var r9 = foo3(1, function (a) { return ''; }, '');
+}, 1);// {} 
+var r9 = foo3(1, function (a) { return ''; }, '');// string 
 function other(t, u) {
-    var r10 = foo2(1, function (x) { return ''; });
-    var r10 = foo2(1, function (x) { return ''; });
-    var r11 = foo3(1, function (x) { return ''; }, '');
-    var r11b = foo3(1, function (x) { return ''; }, 1);
+    var r10 = foo2(1, function (x) { return ''; });// string, non-generic signature allows inferences to be made 
+    var r10 = foo2(1, function (x) { return ''; });// string 
+    var r11 = foo3(1, function (x) { return ''; }, '');// string 
+    var r11b = foo3(1, function (x) { return ''; }, 1);// {} 
     var r12 = foo3(1, function (a) {
         return '';
-    }, 1);
+    }, 1);// {} 
 }
diff --git a/tests/baselines/reference/genericCallWithFunctionTypedArguments2.js b/tests/baselines/reference/genericCallWithFunctionTypedArguments2.js
index 91445966e30..3c886dd448b 100644
--- a/tests/baselines/reference/genericCallWithFunctionTypedArguments2.js
+++ b/tests/baselines/reference/genericCallWithFunctionTypedArguments2.js
@@ -50,21 +50,21 @@ function foo(x) {
 var i;
 var i2;
 var a;
-var r = foo(i);
-var r2 = foo(i);
-var r3 = foo(i2);
-var r3b = foo(a);
+var r = foo(i);// any 
+var r2 = foo(i);// string  
+var r3 = foo(i2);// string 
+var r3b = foo(a);// any 
 function foo2(x, cb) {
     return new cb(x);
 }
-var r4 = foo2(1, i2);
-var r4b = foo2(1, a);
-var r5 = foo2(1, i);
-var r6 = foo2('', i2);
+var r4 = foo2(1, i2);// string, instantiated generic 
+var r4b = foo2(1, a);// any 
+var r5 = foo2(1, i);// any 
+var r6 = foo2('', i2);// string 
 function foo3(x, cb, y) {
     return new cb(x);
 }
-var r7 = foo3(null, i, '');
-var r7b = foo3(null, a, '');
-var r8 = foo3(1, i2, 1);
-var r9 = foo3('', i2, '');
+var r7 = foo3(null, i, '');// any 
+var r7b = foo3(null, a, '');// any 
+var r8 = foo3(1, i2, 1);// {} 
+var r9 = foo3('', i2, '');// string 
diff --git a/tests/baselines/reference/genericCallWithFunctionTypedArguments3.js b/tests/baselines/reference/genericCallWithFunctionTypedArguments3.js
index cd61b1d69f5..a5221507452 100644
--- a/tests/baselines/reference/genericCallWithFunctionTypedArguments3.js
+++ b/tests/baselines/reference/genericCallWithFunctionTypedArguments3.js
@@ -27,6 +27,6 @@ function foo4(cb) {
     var u;
     return u;
 }
-var r = foo4(a);
+var r = foo4(a);// T is {} (candidates boolean and string), U is any (candidates any and boolean) 
 var b;
-var r2 = foo4(b);
+var r2 = foo4(b);// T is {} (candidates boolean and {}), U is any (candidates any and {}) 
diff --git a/tests/baselines/reference/genericCallWithFunctionTypedArguments4.js b/tests/baselines/reference/genericCallWithFunctionTypedArguments4.js
index 58208df410c..a1ac8a612c4 100644
--- a/tests/baselines/reference/genericCallWithFunctionTypedArguments4.js
+++ b/tests/baselines/reference/genericCallWithFunctionTypedArguments4.js
@@ -39,6 +39,6 @@ function foo4(cb) {
     var u;
     return u;
 }
-var r = foo4(a);
+var r = foo4(a);// T is {} (candidates boolean and string), U is {} (candidates C and D) 
 var b;
-var r2 = foo4(b);
+var r2 = foo4(b);// T is {} (candidates boolean and {}), U is any (candidates any and {}) 
diff --git a/tests/baselines/reference/genericCallWithFunctionTypedArguments5.js b/tests/baselines/reference/genericCallWithFunctionTypedArguments5.js
index 543c3ceedb2..94b63f2d790 100644
--- a/tests/baselines/reference/genericCallWithFunctionTypedArguments5.js
+++ b/tests/baselines/reference/genericCallWithFunctionTypedArguments5.js
@@ -28,15 +28,15 @@ function foo(arg) {
     return arg.cb(null);
 }
 var arg = { cb: function (x) { return ''; } };
-var r = foo(arg);
+var r = foo(arg);// {} 
 // more args not allowed
-var r2 = foo({ cb: function (x, y) { return ''; } });
-var r3 = foo({ cb: function (x, y) { return ''; } });
+var r2 = foo({ cb: function (x, y) { return ''; } });// error 
+var r3 = foo({ cb: function (x, y) { return ''; } });// error 
 function foo2(arg) {
     return arg.cb(null, null);
 }
 // fewer args ok
-var r4 = foo(arg);
-var r5 = foo({ cb: function (x) { return ''; } });
-var r6 = foo({ cb: function (x) { return ''; } });
-var r7 = foo({ cb: function () { return ''; } });
+var r4 = foo(arg);// {} 
+var r5 = foo({ cb: function (x) { return ''; } });// {} 
+var r6 = foo({ cb: function (x) { return ''; } });// string 
+var r7 = foo({ cb: function () { return ''; } });// string 
diff --git a/tests/baselines/reference/genericCallWithGenericSignatureArguments.js b/tests/baselines/reference/genericCallWithGenericSignatureArguments.js
index 2a2c7eda719..5492e37aa4a 100644
--- a/tests/baselines/reference/genericCallWithGenericSignatureArguments.js
+++ b/tests/baselines/reference/genericCallWithGenericSignatureArguments.js
@@ -50,21 +50,21 @@ function foo(a, b) {
     return r;
 }
 //var r1 = foo((x: number) => 1, (x: string) => ''); // error
-var r1b = foo(function (x) { return 1; }, function (x) { return ''; });
-var r2 = foo(function (x) { return null; }, function (x) { return ''; });
-var r3 = foo(function (x) { return 1; }, function (x) { return null; });
-var r3ii = foo(function (x) { return 1; }, function (x) { return 1; });
+var r1b = foo(function (x) { return 1; }, function (x) { return ''; });// {} => {} 
+var r2 = foo(function (x) { return null; }, function (x) { return ''; });// Object => Object 
+var r3 = foo(function (x) { return 1; }, function (x) { return null; });// number => number 
+var r3ii = foo(function (x) { return 1; }, function (x) { return 1; });// number => number 
 var a;
 var b;
-var r4 = foo(function (x) { return a; }, function (x) { return b; });
-var r5 = foo(function (x) { return b; }, function (x) { return a; });
+var r4 = foo(function (x) { return a; }, function (x) { return b; });// typeof a => typeof a 
+var r5 = foo(function (x) { return b; }, function (x) { return a; });// typeof b => typeof b 
 function other(x) {
-    var r6 = foo(function (a) { return a; }, function (b) { return b; });
-    var r6b = foo(function (a) { return a; }, function (b) { return b; });
+    var r6 = foo(function (a) { return a; }, function (b) { return b; });// T => T 
+    var r6b = foo(function (a) { return a; }, function (b) { return b; });// {} => {} 
 }
 function other2(x) {
-    var r7 = foo(function (a) { return a; }, function (b) { return b; });
-    var r7b = foo(function (a) { return a; }, function (b) { return b; });
+    var r7 = foo(function (a) { return a; }, function (b) { return b; });// T => T 
+    var r7b = foo(function (a) { return a; }, function (b) { return b; });// {} => {} 
     var r8 = r7(null);
 }
 function foo2(a, b) {
@@ -72,5 +72,5 @@ function foo2(a, b) {
     return r;
 }
 function other3(x) {
-    var r8 = foo2(function (a) { return a; }, function (b) { return b; });
+    var r8 = foo2(function (a) { return a; }, function (b) { return b; });// Date => Date 
 }
diff --git a/tests/baselines/reference/genericCallWithGenericSignatureArguments2.js b/tests/baselines/reference/genericCallWithGenericSignatureArguments2.js
index fd1ac223b6b..c62351e3ead 100644
--- a/tests/baselines/reference/genericCallWithGenericSignatureArguments2.js
+++ b/tests/baselines/reference/genericCallWithGenericSignatureArguments2.js
@@ -45,18 +45,18 @@ function foo(a, b) {
 }
 var r1 = foo(function (x) { return 1; }, function (x) { return ''; });
 function other2(x) {
-    var r7 = foo(function (a) { return a; }, function (b) { return b; });
+    var r7 = foo(function (a) { return a; }, function (b) { return b; });// T => T 
     // BUG 835518
-    var r9 = r7(new Date());
-    var r10 = r7(1);
+    var r9 = r7(new Date());// should be ok 
+    var r10 = r7(1);// error 
 }
 function foo2(a, b) {
     var r;
     return r;
 }
 function other3(x) {
-    var r7 = foo2(function (a) { return a; }, function (b) { return b; });
-    var r7b = foo2(function (a) { return a; }, function (b) { return b; });
+    var r7 = foo2(function (a) { return a; }, function (b) { return b; });// error 
+    var r7b = foo2(function (a) { return a; }, function (b) { return b; });// valid, T is inferred to be Date 
 }
 var E;
 (function (E) {
@@ -70,4 +70,4 @@ function foo3(x, a, b) {
     var r;
     return r;
 }
-var r7 = foo3(0 /* A */, function (x) { return 0 /* A */; }, function (x) { return 0 /* A */; });
+var r7 = foo3(0 /* A */, function (x) { return 0 /* A */; }, function (x) { return 0 /* A */; });// error 
diff --git a/tests/baselines/reference/genericCallWithGenericSignatureArguments3.js b/tests/baselines/reference/genericCallWithGenericSignatureArguments3.js
index 092a5093702..f7bb33be9fd 100644
--- a/tests/baselines/reference/genericCallWithGenericSignatureArguments3.js
+++ b/tests/baselines/reference/genericCallWithGenericSignatureArguments3.js
@@ -40,12 +40,12 @@ function foo(x, a, b) {
     var r;
     return r;
 }
-var r1 = foo('', function (x) { return ''; }, function (x) { return null; });
-var r1ii = foo('', function (x) { return ''; }, function (x) { return null; });
-var r2 = foo('', function (x) { return ''; }, function (x) { return ''; });
-var r3 = foo(null, function (x) { return ''; }, function (x) { return ''; });
-var r4 = foo(null, function (x) { return ''; }, function (x) { return ''; });
-var r5 = foo(new Object(), function (x) { return ''; }, function (x) { return ''; });
+var r1 = foo('', function (x) { return ''; }, function (x) { return null; });// any => any 
+var r1ii = foo('', function (x) { return ''; }, function (x) { return null; });// string => string 
+var r2 = foo('', function (x) { return ''; }, function (x) { return ''; });// string => string 
+var r3 = foo(null, function (x) { return ''; }, function (x) { return ''; });// Object => Object 
+var r4 = foo(null, function (x) { return ''; }, function (x) { return ''; });// any => any 
+var r5 = foo(new Object(), function (x) { return ''; }, function (x) { return ''; });// Object => Object 
 var E;
 (function (E) {
     E[E["A"] = 0] = "A";
@@ -54,14 +54,14 @@ var F;
 (function (F) {
     F[F["A"] = 0] = "A";
 })(F || (F = {}));
-var r6 = foo(0 /* A */, function (x) { return 0 /* A */; }, function (x) { return 0 /* A */; });
+var r6 = foo(0 /* A */, function (x) { return 0 /* A */; }, function (x) { return 0 /* A */; });// number => number  
 function foo2(x, a, b) {
     var r;
     return r;
 }
-var r8 = foo2('', function (x) { return ''; }, function (x) { return null; });
-var r9 = foo2(null, function (x) { return ''; }, function (x) { return ''; });
-var r10 = foo2(null, function (x) { return ''; }, function (x) { return ''; });
+var r8 = foo2('', function (x) { return ''; }, function (x) { return null; });// string => string 
+var r9 = foo2(null, function (x) { return ''; }, function (x) { return ''; });// any => any 
+var r10 = foo2(null, function (x) { return ''; }, function (x) { return ''; });// Object => Object 
 var x;
-var r11 = foo2(x, function (a1) { return function (n) { return 1; }; }, function (a2) { return 2; });
-var r12 = foo2(x, function (a1) { return function (n) { return 1; }; }, function (a2) { return 2; });
+var r11 = foo2(x, function (a1) { return function (n) { return 1; }; }, function (a2) { return 2; });// {} => {} 
+var r12 = foo2(x, function (a1) { return function (n) { return 1; }; }, function (a2) { return 2; });// (string => boolean) => {} 
diff --git a/tests/baselines/reference/genericCallWithNonSymmetricSubtypes.js b/tests/baselines/reference/genericCallWithNonSymmetricSubtypes.js
index 3d97dfede32..78c5b93264f 100644
--- a/tests/baselines/reference/genericCallWithNonSymmetricSubtypes.js
+++ b/tests/baselines/reference/genericCallWithNonSymmetricSubtypes.js
@@ -40,17 +40,17 @@ function foo(x, y) {
 }
 var a;
 var b;
-var r = foo(a, b);
-var r2 = foo(b, a);
+var r = foo(a, b);// { x: number; y?: number; }; 
+var r2 = foo(b, a);// { x: number; z?: number; }; 
 var x;
 var y;
-var r3 = foo(a, x);
-var r4 = foo(x, a);
-var r5 = foo(a, y);
-var r5 = foo(y, a);
-var r6 = foo(x, y);
-var r6 = foo(y, x);
+var r3 = foo(a, x);// { x: number; y?: number; }; 
+var r4 = foo(x, a);// { x: number; }; 
+var r5 = foo(a, y);// { x?: number; }; 
+var r5 = foo(y, a);// { x?: number; }; 
+var r6 = foo(x, y);// { x?: number; }; 
+var r6 = foo(y, x);// { x?: number; }; 
 var s1;
 var s2;
-var r7 = foo(s1, s2);
-var r8 = foo(s2, s1);
+var r7 = foo(s1, s2);// (x: Object) => string; 
+var r8 = foo(s2, s1);// (x: string) => string; 
diff --git a/tests/baselines/reference/genericCallWithObjectLiteralArgs.js b/tests/baselines/reference/genericCallWithObjectLiteralArgs.js
index 7ff09340d71..f9bad34d2ec 100644
--- a/tests/baselines/reference/genericCallWithObjectLiteralArgs.js
+++ b/tests/baselines/reference/genericCallWithObjectLiteralArgs.js
@@ -13,8 +13,8 @@ var r4 = foo<Object>({ bar: 1, baz: '' }); // T = Object
 function foo(x) {
     return x;
 }
-var r = foo({ bar: 1, baz: '' });
-var r2 = foo({ bar: 1, baz: 1 });
+var r = foo({ bar: 1, baz: '' });// T = {} 
+var r2 = foo({ bar: 1, baz: 1 });// T = number 
 // BUG 835724
-var r3 = foo({ bar: foo, baz: foo });
-var r4 = foo({ bar: 1, baz: '' });
+var r3 = foo({ bar: foo, baz: foo });// T = any 
+var r4 = foo({ bar: 1, baz: '' });// T = Object 
diff --git a/tests/baselines/reference/genericCallWithObjectLiteralArguments1.js b/tests/baselines/reference/genericCallWithObjectLiteralArguments1.js
index b731e5fe942..42c34a0b8b9 100644
--- a/tests/baselines/reference/genericCallWithObjectLiteralArguments1.js
+++ b/tests/baselines/reference/genericCallWithObjectLiteralArguments1.js
@@ -11,7 +11,7 @@ var x5 = foo<string>({ x: "", y: 4 }, "");
 function foo(n, m) {
     return m;
 }
-var x = foo({ x: 3, y: "" }, 4);
+var x = foo({ x: 3, y: "" }, 4);// no error, x is Object, the best common type 
 // these are all errors
 var x2 = foo({ x: 3, y: "" }, 4);
 var x3 = foo({ x: 3, y: "" }, 4);
diff --git a/tests/baselines/reference/genericCallWithObjectTypeArgs.js b/tests/baselines/reference/genericCallWithObjectTypeArgs.js
index 69658c83991..19495dc0c38 100644
--- a/tests/baselines/reference/genericCallWithObjectTypeArgs.js
+++ b/tests/baselines/reference/genericCallWithObjectTypeArgs.js
@@ -43,5 +43,5 @@ function foo(t, t2) {
 }
 var c1 = new X();
 var d1 = new X();
-var r = foo(c1, d1);
-var r2 = foo(c1, c1);
+var r = foo(c1, d1);// error 
+var r2 = foo(c1, c1);// ok 
diff --git a/tests/baselines/reference/genericCallWithObjectTypeArgs2.js b/tests/baselines/reference/genericCallWithObjectTypeArgs2.js
index 160b4885cfd..7b3d2f43ae0 100644
--- a/tests/baselines/reference/genericCallWithObjectTypeArgs2.js
+++ b/tests/baselines/reference/genericCallWithObjectTypeArgs2.js
@@ -62,11 +62,11 @@ var Derived2 = (function (_super) {
 function f(a) {
     return [a.x, a.y];
 }
-var r = f({ x: new Derived(), y: new Derived2() });
-var r2 = f({ x: new Base(), y: new Derived2() });
+var r = f({ x: new Derived(), y: new Derived2() });// {}[] 
+var r2 = f({ x: new Base(), y: new Derived2() });// {}[] 
 function f2(a) {
     return function (x) { return a.y; };
 }
-var r3 = f2({ x: new Derived(), y: new Derived2() });
+var r3 = f2({ x: new Derived(), y: new Derived2() });// Derived => Derived2 
 var i;
-var r4 = f2(i);
+var r4 = f2(i);// Base => Derived 
diff --git a/tests/baselines/reference/genericCallWithObjectTypeArgsAndConstraints2.js b/tests/baselines/reference/genericCallWithObjectTypeArgsAndConstraints2.js
index 6cc9902c932..d1aeca072b9 100644
--- a/tests/baselines/reference/genericCallWithObjectTypeArgsAndConstraints2.js
+++ b/tests/baselines/reference/genericCallWithObjectTypeArgsAndConstraints2.js
@@ -76,5 +76,5 @@ function f3(x, y) {
 }
 var r4 = f3(new Base(), function (x) { return x; });
 var r5 = f3(new Derived(), function (x) { return x; });
-var r6 = f3(null, null);
-var r7 = f3(null, function (x) { return x; });
+var r6 = f3(null, null);// any 
+var r7 = f3(null, function (x) { return x; });// any 
diff --git a/tests/baselines/reference/genericCallWithObjectTypeArgsAndConstraints3.js b/tests/baselines/reference/genericCallWithObjectTypeArgsAndConstraints3.js
index 7c0e656b7e7..f45418f2523 100644
--- a/tests/baselines/reference/genericCallWithObjectTypeArgsAndConstraints3.js
+++ b/tests/baselines/reference/genericCallWithObjectTypeArgsAndConstraints3.js
@@ -68,13 +68,13 @@ function f(a) {
     var r;
     return r;
 }
-var r1 = f({ x: new Derived(), y: new Derived2() });
+var r1 = f({ x: new Derived(), y: new Derived2() });// ok, both extend Base 
 function f2(a) {
     var r;
     return r;
 }
-var r2 = f2({ x: new Derived(), y: new Derived2() });
-var r3 = f2({ x: new Derived(), y: new Derived2() });
+var r2 = f2({ x: new Derived(), y: new Derived2() });// ok 
+var r3 = f2({ x: new Derived(), y: new Derived2() });// ok 
 function f3(y, x) {
     return y(null);
 }
diff --git a/tests/baselines/reference/genericCallWithObjectTypeArgsAndConstraints4.js b/tests/baselines/reference/genericCallWithObjectTypeArgsAndConstraints4.js
index 7e25ac69baf..5e5adc6fde2 100644
--- a/tests/baselines/reference/genericCallWithObjectTypeArgsAndConstraints4.js
+++ b/tests/baselines/reference/genericCallWithObjectTypeArgsAndConstraints4.js
@@ -51,7 +51,7 @@ function foo(t, t2) {
 var c;
 var d;
 var r = foo(c, d);
-var r2 = foo(d, c);
+var r2 = foo(d, c);// error because C does not extend D 
 var r3 = foo(c, { x: '', foo: c });
 var r4 = foo(null, null);
 var r5 = foo({}, null);
@@ -64,5 +64,5 @@ var r9 = foo(function () {
 }, function () { return 1; });
 function other() {
     var r4 = foo(c, d);
-    var r5 = foo(c, d);
+    var r5 = foo(c, d);// error 
 }
diff --git a/tests/baselines/reference/genericCallWithObjectTypeArgsAndConstraints5.js b/tests/baselines/reference/genericCallWithObjectTypeArgsAndConstraints5.js
index 0ac160418d9..4744e3410c2 100644
--- a/tests/baselines/reference/genericCallWithObjectTypeArgsAndConstraints5.js
+++ b/tests/baselines/reference/genericCallWithObjectTypeArgsAndConstraints5.js
@@ -41,9 +41,9 @@ function foo(t, t2) {
 }
 var c;
 var d;
-var r2 = foo(d, c);
+var r2 = foo(d, c);// the constraints are self-referencing, no downstream error 
 var r9 = foo(function () { return 1; }, function () {
-});
+});// the constraints are self-referencing, no downstream error 
 function other() {
-    var r5 = foo(c, d);
+    var r5 = foo(c, d);// error 
 }
diff --git a/tests/baselines/reference/genericCallWithObjectTypeArgsAndIndexersErrors.js b/tests/baselines/reference/genericCallWithObjectTypeArgsAndIndexersErrors.js
index d8fb8dd7125..4d419169691 100644
--- a/tests/baselines/reference/genericCallWithObjectTypeArgsAndIndexersErrors.js
+++ b/tests/baselines/reference/genericCallWithObjectTypeArgsAndIndexersErrors.js
@@ -31,12 +31,12 @@ function foo(x) {
 }
 function other(arg) {
     var b;
-    var r2 = foo(b);
+    var r2 = foo(b);// T 
 }
 function other3(arg) {
     var b;
     var r2 = foo(b);
     var d = r2[1];
     var e = r2['1'];
-    var u = r2[1];
+    var u = r2[1];// ok 
 }
diff --git a/tests/baselines/reference/genericCallWithObjectTypeArgsAndInitializers.js b/tests/baselines/reference/genericCallWithObjectTypeArgsAndInitializers.js
index 2e16b232b29..e374c83a622 100644
--- a/tests/baselines/reference/genericCallWithObjectTypeArgsAndInitializers.js
+++ b/tests/baselines/reference/genericCallWithObjectTypeArgsAndInitializers.js
@@ -14,23 +14,23 @@ function foo7<T, U extends T, V extends U>(x: V, y: U = x) { } // should be ok
 function foo(x) {
     if (x === void 0) { x = null; }
     return x;
-}
+}// ok 
 function foo2(x) {
     if (x === void 0) { x = undefined; }
     return x;
-}
+}// ok 
 function foo3(x) {
     if (x === void 0) { x = 1; }
-}
+}// error 
 function foo4(x, y) {
     if (y === void 0) { y = x; }
-}
+}// error 
 function foo5(x, y) {
     if (y === void 0) { y = x; }
-}
+}// ok 
 function foo6(x, y, z) {
     if (z === void 0) { z = y; }
-}
+}// error 
 function foo7(x, y) {
     if (y === void 0) { y = x; }
-}
+}// should be ok 
diff --git a/tests/baselines/reference/genericCallWithObjectTypeArgsAndNumericIndexer.js b/tests/baselines/reference/genericCallWithObjectTypeArgsAndNumericIndexer.js
index c016b8550d1..be111a67d22 100644
--- a/tests/baselines/reference/genericCallWithObjectTypeArgsAndNumericIndexer.js
+++ b/tests/baselines/reference/genericCallWithObjectTypeArgsAndNumericIndexer.js
@@ -43,7 +43,7 @@ var a;
 var r = foo(a);
 function other(arg) {
     var b;
-    var r2 = foo(b);
+    var r2 = foo(b);// T 
 }
 function other2(arg) {
     var b;
diff --git a/tests/baselines/reference/genericCallWithObjectTypeArgsAndStringIndexer.js b/tests/baselines/reference/genericCallWithObjectTypeArgsAndStringIndexer.js
index 21bf9e42c55..5061bd9dee9 100644
--- a/tests/baselines/reference/genericCallWithObjectTypeArgsAndStringIndexer.js
+++ b/tests/baselines/reference/genericCallWithObjectTypeArgsAndStringIndexer.js
@@ -44,15 +44,15 @@ var a;
 var r = foo(a);
 function other(arg) {
     var b;
-    var r2 = foo(b);
+    var r2 = foo(b);// T 
 }
 function other2(arg) {
     var b;
     var r2 = foo(b);
-    var d = r2['hm'];
+    var d = r2['hm'];// ok 
 }
 function other3(arg) {
     var b;
     var r2 = foo(b);
-    var d = r2['hm'];
+    var d = r2['hm'];// ok 
 }
diff --git a/tests/baselines/reference/genericCallWithOverloadedConstructorTypedArguments.js b/tests/baselines/reference/genericCallWithOverloadedConstructorTypedArguments.js
index 2d389739979..9ea0bec6814 100644
--- a/tests/baselines/reference/genericCallWithOverloadedConstructorTypedArguments.js
+++ b/tests/baselines/reference/genericCallWithOverloadedConstructorTypedArguments.js
@@ -67,20 +67,20 @@ var GenericParameter;
         return cb;
     }
     var a;
-    var r5 = foo5(a);
+    var r5 = foo5(a);// new{} => string; new(x:number) => {} 
     var b;
-    var r7 = foo5(b);
+    var r7 = foo5(b);// new any => string; new(x:number) => any 
     function foo6(cb) {
         return cb;
     }
-    var r8 = foo6(a);
-    var r9 = foo6(b);
+    var r8 = foo6(a);// new{} => string; new(x:{}, y?:{}) => string 
+    var r9 = foo6(b);// new any => string; new(x:any, y?:any) => string 
     function foo7(x, cb) {
         return cb;
     }
-    var r13 = foo7(1, b);
+    var r13 = foo7(1, b);// new any => string; new(x:any, y?:any) => string 
     var c;
     var c2;
-    var r14 = foo7(1, c);
-    var r15 = foo7(1, c2);
+    var r14 = foo7(1, c);// new any => string; new(x:any, y?:any) => string 
+    var r15 = foo7(1, c2);// new any => string; new(x:any, y?:any) => string 
 })(GenericParameter || (GenericParameter = {}));
diff --git a/tests/baselines/reference/genericCallWithOverloadedConstructorTypedArguments2.js b/tests/baselines/reference/genericCallWithOverloadedConstructorTypedArguments2.js
index 3e5d91423ae..725ee99fbb8 100644
--- a/tests/baselines/reference/genericCallWithOverloadedConstructorTypedArguments2.js
+++ b/tests/baselines/reference/genericCallWithOverloadedConstructorTypedArguments2.js
@@ -50,7 +50,7 @@ var NonGenericParameter;
         return cb;
     }
     var b;
-    var r3 = foo4(b);
+    var r3 = foo4(b);// ok 
 })(NonGenericParameter || (NonGenericParameter = {}));
 var GenericParameter;
 (function (GenericParameter) {
@@ -58,16 +58,16 @@ var GenericParameter;
         return cb;
     }
     var a;
-    var r6 = foo5(a);
+    var r6 = foo5(a);// ok 
     function foo6(cb) {
         return cb;
     }
     var b;
-    var r10 = foo6(b);
+    var r10 = foo6(b);// error 
     function foo7(x, cb) {
         return cb;
     }
-    var r13 = foo7(1, a);
+    var r13 = foo7(1, a);// ok 
     var c;
-    var r14 = foo7(1, c);
+    var r14 = foo7(1, c);// ok 
 })(GenericParameter || (GenericParameter = {}));
diff --git a/tests/baselines/reference/genericCallWithOverloadedFunctionTypedArguments.js b/tests/baselines/reference/genericCallWithOverloadedFunctionTypedArguments.js
index f28983c0a22..ad86464cc75 100644
--- a/tests/baselines/reference/genericCallWithOverloadedFunctionTypedArguments.js
+++ b/tests/baselines/reference/genericCallWithOverloadedFunctionTypedArguments.js
@@ -62,20 +62,20 @@ var GenericParameter;
     function foo5(cb) {
         return cb;
     }
-    var r5 = foo5(function (x) { return x; });
+    var r5 = foo5(function (x) { return x; });// any => string (+1 overload) [inferences are made for T, but lambda not contextually typed]. T is any 
     var a;
-    var r7 = foo5(a);
+    var r7 = foo5(a);// any => string (+1 overload) 
     function foo6(cb) {
         return cb;
     }
-    var r8 = foo6(function (x) { return x; });
-    var r9 = foo6(function (x) { return ''; });
-    var r11 = foo6(function (x, y) { return ''; });
+    var r8 = foo6(function (x) { return x; });// any => string (+1 overload) [inferences are made for T, but lambda not contextually typed]. T is any 
+    var r9 = foo6(function (x) { return ''; });// any => string (+1 overload) 
+    var r11 = foo6(function (x, y) { return ''; });// any => string (+1 overload) 
     function foo7(x, cb) {
         return cb;
     }
-    var r12 = foo7(1, function (x) { return x; });
-    var r13 = foo7(1, function (x) { return ''; });
+    var r12 = foo7(1, function (x) { return x; });// any => string (+1 overload) [inferences are made for T, but lambda not contextually typed] 
+    var r13 = foo7(1, function (x) { return ''; });// any => string (+1 overload) [inferences are made for T, but lambda not contextually typed] 
     var a;
-    var r14 = foo7(1, a);
+    var r14 = foo7(1, a);// any => string (+1 overload) [inferences are made for T, but lambda not contextually typed] 
 })(GenericParameter || (GenericParameter = {}));
diff --git a/tests/baselines/reference/genericCallWithOverloadedFunctionTypedArguments2.js b/tests/baselines/reference/genericCallWithOverloadedFunctionTypedArguments2.js
index 901db22bd68..b0434974ede 100644
--- a/tests/baselines/reference/genericCallWithOverloadedFunctionTypedArguments2.js
+++ b/tests/baselines/reference/genericCallWithOverloadedFunctionTypedArguments2.js
@@ -49,22 +49,22 @@ var NonGenericParameter;
     var r3 = foo4(function (x) {
         var r;
         return r;
-    });
+    });// ok 
 })(NonGenericParameter || (NonGenericParameter = {}));
 var GenericParameter;
 (function (GenericParameter) {
     function foo5(cb) {
         return cb;
     }
-    var r6 = foo5(function (x) { return x; });
+    var r6 = foo5(function (x) { return x; });// ok 
     function foo6(cb) {
         return cb;
     }
-    var r10 = foo6(function (x, y) { return ''; });
+    var r10 = foo6(function (x, y) { return ''; });// error 
     function foo7(x, cb) {
         return cb;
     }
-    var r13 = foo7(1, function (x) { return x; });
+    var r13 = foo7(1, function (x) { return x; });// ok 
     var a;
-    var r14 = foo7(1, a);
+    var r14 = foo7(1, a);// ok 
 })(GenericParameter || (GenericParameter = {}));
diff --git a/tests/baselines/reference/genericChainedCalls.js b/tests/baselines/reference/genericChainedCalls.js
index 536d156196e..6ffd554a45c 100644
--- a/tests/baselines/reference/genericChainedCalls.js
+++ b/tests/baselines/reference/genericChainedCalls.js
@@ -17,5 +17,5 @@ var s3 = s2.func(num => num.toString())
 //// [genericChainedCalls.js]
 var r1 = v1.func(function (num) { return num.toString(); }).func(function (str) { return str.length; }).func(function (num) { return num.toString(); });
 var s1 = v1.func(function (num) { return num.toString(); });
-var s2 = s1.func(function (str) { return str.length; });
+var s2 = s1.func(function (str) { return str.length; })// should also error ;// should also error 
 var s3 = s2.func(function (num) { return num.toString(); });
diff --git a/tests/baselines/reference/genericClassWithFunctionTypedMemberArguments.js b/tests/baselines/reference/genericClassWithFunctionTypedMemberArguments.js
index 0fc7d665fe4..c669c286307 100644
--- a/tests/baselines/reference/genericClassWithFunctionTypedMemberArguments.js
+++ b/tests/baselines/reference/genericClassWithFunctionTypedMemberArguments.js
@@ -78,9 +78,9 @@ var ImmediatelyFix;
         return C;
     })();
     var c = new C();
-    var r = c.foo(function (x) { return ''; });
-    var r2 = c.foo(function (x) { return ''; });
-    var r3 = c.foo(function (x) { return ''; });
+    var r = c.foo(function (x) { return ''; });// {} 
+    var r2 = c.foo(function (x) { return ''; });// string  
+    var r3 = c.foo(function (x) { return ''; });// {} 
     var C2 = (function () {
         function C2() {
         }
@@ -90,8 +90,8 @@ var ImmediatelyFix;
         return C2;
     })();
     var c2 = new C2();
-    var ra = c2.foo(function (x) { return 1; });
-    var r3a = c2.foo(function (x) { return 1; });
+    var ra = c2.foo(function (x) { return 1; });// number 
+    var r3a = c2.foo(function (x) { return 1; });// number 
 })(ImmediatelyFix || (ImmediatelyFix = {}));
 var WithCandidates;
 (function (WithCandidates) {
@@ -106,9 +106,9 @@ var WithCandidates;
     var c;
     var r4 = c.foo2(1, function (a) {
         return '';
-    });
-    var r5 = c.foo2(1, function (a) { return ''; });
-    var r6 = c.foo2('', function (a) { return 1; });
+    });// string, contextual signature instantiation is applied to generic functions 
+    var r5 = c.foo2(1, function (a) { return ''; });// string 
+    var r6 = c.foo2('', function (a) { return 1; });// number 
     var C2 = (function () {
         function C2() {
         }
@@ -118,10 +118,10 @@ var WithCandidates;
         return C2;
     })();
     var c2;
-    var r7 = c2.foo3(1, function (a) { return ''; }, '');
+    var r7 = c2.foo3(1, function (a) { return ''; }, '');// string 
     var r8 = c2.foo3(1, function (a) {
         return '';
-    }, '');
+    }, '');// string 
     var C3 = (function () {
         function C3() {
         }
@@ -132,12 +132,12 @@ var WithCandidates;
     })();
     var c3;
     function other(t, u) {
-        var r10 = c.foo2(1, function (x) { return ''; });
-        var r10 = c.foo2(1, function (x) { return ''; });
-        var r11 = c3.foo3(1, function (x) { return ''; }, '');
-        var r11b = c3.foo3(1, function (x) { return ''; }, 1);
+        var r10 = c.foo2(1, function (x) { return ''; });// string, non-generic signature allows inferences to be made 
+        var r10 = c.foo2(1, function (x) { return ''; });// string 
+        var r11 = c3.foo3(1, function (x) { return ''; }, '');// string 
+        var r11b = c3.foo3(1, function (x) { return ''; }, 1);// {} 
         var r12 = c3.foo3(1, function (a) {
             return '';
-        }, 1);
+        }, 1);// {} 
     }
 })(WithCandidates || (WithCandidates = {}));
diff --git a/tests/baselines/reference/genericClasses0.js b/tests/baselines/reference/genericClasses0.js
index 4b69110269a..7bc92d7f78f 100644
--- a/tests/baselines/reference/genericClasses0.js
+++ b/tests/baselines/reference/genericClasses0.js
@@ -14,7 +14,7 @@ var C = (function () {
     return C;
 })();
 var v1;
-var y = v1.x;
+var y = v1.x;// should be 'string' 
 
 
 //// [genericClasses0.d.ts]
diff --git a/tests/baselines/reference/genericClasses1.js b/tests/baselines/reference/genericClasses1.js
index b3747a1023a..8830fac3159 100644
--- a/tests/baselines/reference/genericClasses1.js
+++ b/tests/baselines/reference/genericClasses1.js
@@ -14,7 +14,7 @@ var C = (function () {
     return C;
 })();
 var v1 = new C();
-var y = v1.x;
+var y = v1.x;// should be 'string' 
 
 
 //// [genericClasses1.d.ts]
diff --git a/tests/baselines/reference/genericClasses2.js b/tests/baselines/reference/genericClasses2.js
index 86393702b0c..44f7e1711da 100644
--- a/tests/baselines/reference/genericClasses2.js
+++ b/tests/baselines/reference/genericClasses2.js
@@ -22,9 +22,9 @@ var C = (function () {
     return C;
 })();
 var v1;
-var y = v1.x;
-var w = v1.y.a;
-var z = v1.z.a;
+var y = v1.x;// should be 'string' 
+var w = v1.y.a;// should be 'string' 
+var z = v1.z.a;// should be 'number' 
 
 
 //// [genericClasses2.d.ts]
diff --git a/tests/baselines/reference/genericClasses3.js b/tests/baselines/reference/genericClasses3.js
index 48634b449ec..d4f75b1d98f 100644
--- a/tests/baselines/reference/genericClasses3.js
+++ b/tests/baselines/reference/genericClasses3.js
@@ -37,8 +37,8 @@ var C = (function (_super) {
     return C;
 })(B);
 var v2;
-var y = v2.x;
-var u = v2.a;
+var y = v2.x;// should be 'string' 
+var u = v2.a;// should be 'string' 
 var z = v2.b;
 
 
diff --git a/tests/baselines/reference/genericCloneReturnTypes2.js b/tests/baselines/reference/genericCloneReturnTypes2.js
index 5784e3bbec3..57cdbd3d1da 100644
--- a/tests/baselines/reference/genericCloneReturnTypes2.js
+++ b/tests/baselines/reference/genericCloneReturnTypes2.js
@@ -27,6 +27,6 @@ var MyList = (function () {
     return MyList;
 })();
 var a;
-var b = a.clone();
-var c = a.clone();
-var d = a.clone();
+var b = a.clone();// ok 
+var c = a.clone();// bug was there was an error on this line 
+var d = a.clone();// error 
diff --git a/tests/baselines/reference/genericFunctions0.js b/tests/baselines/reference/genericFunctions0.js
index 353aef05bac..dc4cc671222 100644
--- a/tests/baselines/reference/genericFunctions0.js
+++ b/tests/baselines/reference/genericFunctions0.js
@@ -7,7 +7,7 @@ var x = foo<number>(5); // 'x' should be number
 function foo(x) {
     return x;
 }
-var x = foo(5);
+var x = foo(5);// 'x' should be number 
 
 
 //// [genericFunctions0.d.ts]
diff --git a/tests/baselines/reference/genericFunctions1.js b/tests/baselines/reference/genericFunctions1.js
index 48d9cad9af7..942dfc4650f 100644
--- a/tests/baselines/reference/genericFunctions1.js
+++ b/tests/baselines/reference/genericFunctions1.js
@@ -7,7 +7,7 @@ var x = foo(5); // 'x' should be number
 function foo(x) {
     return x;
 }
-var x = foo(5);
+var x = foo(5);// 'x' should be number 
 
 
 //// [genericFunctions1.d.ts]
diff --git a/tests/baselines/reference/genericImplements.js b/tests/baselines/reference/genericImplements.js
index 68e8b1111e8..8b04a6f5a81 100644
--- a/tests/baselines/reference/genericImplements.js
+++ b/tests/baselines/reference/genericImplements.js
@@ -41,7 +41,7 @@ var X = (function () {
         return undefined;
     };
     return X;
-})();
+})();// { f: () => { b; } } 
 // OK
 var Y = (function () {
     function Y() {
@@ -50,7 +50,7 @@ var Y = (function () {
         return undefined;
     };
     return Y;
-})();
+})();// { f: () => { a; } } 
 // OK
 var Z = (function () {
     function Z() {
@@ -59,4 +59,4 @@ var Z = (function () {
         return undefined;
     };
     return Z;
-})();
+})();// { f: <T>() => T }  
diff --git a/tests/baselines/reference/genericInference2.js b/tests/baselines/reference/genericInference2.js
index 99be1a38eb7..2d21fcc9d19 100644
--- a/tests/baselines/reference/genericInference2.js
+++ b/tests/baselines/reference/genericInference2.js
@@ -25,9 +25,9 @@ var o = {
     name: ko.observable("Bob"),
     age: ko.observable(37)
 };
-var x_v = o.name().length;
-var age_v = o.age();
-var name_v = o.name("Robert");
-var zz_v = o.name.N;
-var yy_v = o.name.g;
-var rr_v = o.name.r;
+var x_v = o.name().length;// should be 'number' 
+var age_v = o.age();// should be 'number' 
+var name_v = o.name("Robert");// should be 'any' 
+var zz_v = o.name.N;// should be 'number' 
+var yy_v = o.name.g;// should be 'boolean' 
+var rr_v = o.name.r;// should be 'string' 
diff --git a/tests/baselines/reference/genericOfACloduleType1.js b/tests/baselines/reference/genericOfACloduleType1.js
index d0ffd8f3657..f8fbebdaac0 100644
--- a/tests/baselines/reference/genericOfACloduleType1.js
+++ b/tests/baselines/reference/genericOfACloduleType1.js
@@ -43,4 +43,4 @@ var M;
     var g1 = new G();
     g1.bar(null).foo();
 })(M || (M = {}));
-var g2 = new G();
+var g2 = new G()// was: error Type reference cannot refer to container 'M.C'. ;// was: error Type reference cannot refer to container 'M.C'. 
diff --git a/tests/baselines/reference/genericReduce.js b/tests/baselines/reference/genericReduce.js
index a4955d52fb9..1cae31a0bc6 100644
--- a/tests/baselines/reference/genericReduce.js
+++ b/tests/baselines/reference/genericReduce.js
@@ -22,6 +22,6 @@ n1.x = "fail";
 n1.toExponential(2);
 n2.x = "fail";
 n2.toExponential(2);
-var n3 = b.reduce(function (x, y) { return x + y; }, "");
+var n3 = b.reduce(function (x, y) { return x + y; }, "");// Initial value is of type string 
 n3.toExponential(2);
 n3.charAt(0);
diff --git a/tests/baselines/reference/genericRestArgs.js b/tests/baselines/reference/genericRestArgs.js
index 5e28ddf2a1f..61b09ac5582 100644
--- a/tests/baselines/reference/genericRestArgs.js
+++ b/tests/baselines/reference/genericRestArgs.js
@@ -20,13 +20,13 @@ function makeArrayG() {
     }
     return items;
 }
-var a1Ga = makeArrayG(1, "");
+var a1Ga = makeArrayG(1, "");// no error 
 var a1Gb = makeArrayG(1, "");
 var a1Gc = makeArrayG(1, "");
-var a1Gd = makeArrayG(1, "");
+var a1Gd = makeArrayG(1, "");// error 
 function makeArrayGOpt(item1, item2, item3) {
     return [item1, item2, item3];
 }
 var a2Ga = makeArrayGOpt(1, "");
 var a2Gb = makeArrayG(1, "");
-var a2Gc = makeArrayG(1, "");
+var a2Gc = makeArrayG(1, "");// error 
diff --git a/tests/baselines/reference/genericReversingTypeParameters.js b/tests/baselines/reference/genericReversingTypeParameters.js
index eede7e23d62..b1ef2d8db4f 100644
--- a/tests/baselines/reference/genericReversingTypeParameters.js
+++ b/tests/baselines/reference/genericReversingTypeParameters.js
@@ -24,5 +24,5 @@ var BiMap = (function () {
 })();
 var b = new BiMap();
 var r1 = b.get('');
-var i = b.inverse();
+var i = b.inverse();// used to get the type wrong here. 
 var r2b = i.get(1);
diff --git a/tests/baselines/reference/genericReversingTypeParameters2.js b/tests/baselines/reference/genericReversingTypeParameters2.js
index 4dd87401775..2753cb7deb9 100644
--- a/tests/baselines/reference/genericReversingTypeParameters2.js
+++ b/tests/baselines/reference/genericReversingTypeParameters2.js
@@ -22,5 +22,5 @@ var BiMap = (function () {
     return BiMap;
 })();
 var b = new BiMap();
-var i = b.inverse();
+var i = b.inverse();// used to get the type wrong here. 
 var r2b = i.get(1);
diff --git a/tests/baselines/reference/genericTypeAssertions1.js b/tests/baselines/reference/genericTypeAssertions1.js
index 091455a7a45..7810ce58e3b 100644
--- a/tests/baselines/reference/genericTypeAssertions1.js
+++ b/tests/baselines/reference/genericTypeAssertions1.js
@@ -13,5 +13,5 @@ var A = (function () {
     return A;
 })();
 var foo = new A();
-var r = new A();
-var r2 = foo;
+var r = new A();// error 
+var r2 = foo;// error 
diff --git a/tests/baselines/reference/genericTypeAssertions2.js b/tests/baselines/reference/genericTypeAssertions2.js
index 333417379c6..1394667a808 100644
--- a/tests/baselines/reference/genericTypeAssertions2.js
+++ b/tests/baselines/reference/genericTypeAssertions2.js
@@ -39,7 +39,7 @@ var B = (function (_super) {
 })(A);
 var foo = new A();
 var r = new B();
-var r2 = new B();
-var r3 = new B();
+var r2 = new B();// error 
+var r3 = new B();// error 
 var r4 = new A();
-var r5 = [];
+var r5 = [];// error 
diff --git a/tests/baselines/reference/genericTypeAssertions3.js b/tests/baselines/reference/genericTypeAssertions3.js
index d59dd31e868..5f5666486d9 100644
--- a/tests/baselines/reference/genericTypeAssertions3.js
+++ b/tests/baselines/reference/genericTypeAssertions3.js
@@ -6,7 +6,7 @@ var s = < <T>(x: T) => T > ((x: any) => { return null; }); // no error
 //// [genericTypeAssertions3.js]
 var r = (function (x) {
     return null;
-});
+});// bug was 'could not find dotted symbol T' on x's annotation in the type assertion instead of no error 
 var s = (function (x) {
     return null;
-});
+});// no error 
diff --git a/tests/baselines/reference/genericTypeReferencesRequireTypeArgs.js b/tests/baselines/reference/genericTypeReferencesRequireTypeArgs.js
index 9c4dd761ad8..b874e80c429 100644
--- a/tests/baselines/reference/genericTypeReferencesRequireTypeArgs.js
+++ b/tests/baselines/reference/genericTypeReferencesRequireTypeArgs.js
@@ -20,7 +20,7 @@ var C = (function () {
     };
     return C;
 })();
-var c1;
-var i1;
-var c2;
-var i2;
+var c1;// error 
+var i1;// error 
+var c2;// should be an error 
+var i2;// should be an error 
diff --git a/tests/baselines/reference/genericTypeWithCallableMembers.js b/tests/baselines/reference/genericTypeWithCallableMembers.js
index c885859dcfd..75c4e3eac40 100644
--- a/tests/baselines/reference/genericTypeWithCallableMembers.js
+++ b/tests/baselines/reference/genericTypeWithCallableMembers.js
@@ -19,8 +19,8 @@ var C = (function () {
         this.data2 = data2;
     }
     C.prototype.create = function () {
-        var x = new this.data();
-        var x2 = new this.data2();
+        var x = new this.data();// no error 
+        var x2 = new this.data2();// was error, shouldn't be 
     };
     return C;
 })();
diff --git a/tests/baselines/reference/genericTypeWithNonGenericBaseMisMatch.js b/tests/baselines/reference/genericTypeWithNonGenericBaseMisMatch.js
index 6fda8db13f5..a5b785a4d07 100644
--- a/tests/baselines/reference/genericTypeWithNonGenericBaseMisMatch.js
+++ b/tests/baselines/reference/genericTypeWithNonGenericBaseMisMatch.js
@@ -18,4 +18,4 @@ var X = (function () {
     return X;
 })();
 var x = new X();
-var i = x;
+var i = x;// Should not be allowed -- type of 'f' is incompatible with 'I' 
diff --git a/tests/baselines/reference/genericWithIndexerOfTypeParameterType1.js b/tests/baselines/reference/genericWithIndexerOfTypeParameterType1.js
index b80b1268f35..48ef00d99ac 100644
--- a/tests/baselines/reference/genericWithIndexerOfTypeParameterType1.js
+++ b/tests/baselines/reference/genericWithIndexerOfTypeParameterType1.js
@@ -19,4 +19,4 @@ var LazyArray = (function () {
     return LazyArray;
 })();
 var lazyArray = new LazyArray();
-var value = lazyArray.array()["test"];
+var value = lazyArray.array()["test"];// used to be an error 
diff --git a/tests/baselines/reference/genericWithOpenTypeParameters1.js b/tests/baselines/reference/genericWithOpenTypeParameters1.js
index f007f182106..b7b257c283a 100644
--- a/tests/baselines/reference/genericWithOpenTypeParameters1.js
+++ b/tests/baselines/reference/genericWithOpenTypeParameters1.js
@@ -24,13 +24,13 @@ var x;
 x.foo(1);
 var f = function (x) {
     return x.foo(1);
-};
+}// error // error ;// error 
 var f2 = function (x) {
     return x.foo(1);
-};
+}// error // error ;// error 
 var f3 = function (x) {
     return x.foo(1);
-};
+}// error // error ;// error 
 var f4 = function (x) {
     return x.foo(1);
-};
+}// no error // no error ;// no error 
diff --git a/tests/baselines/reference/generics0.js b/tests/baselines/reference/generics0.js
index 844ca59b92b..384bbe47596 100644
--- a/tests/baselines/reference/generics0.js
+++ b/tests/baselines/reference/generics0.js
@@ -9,7 +9,7 @@ var z = v2.x; // 'y' should be of type 'string'
 
 //// [generics0.js]
 var v2;
-var z = v2.x;
+var z = v2.x;// 'y' should be of type 'string' 
 
 
 //// [generics0.d.ts]
diff --git a/tests/baselines/reference/generics1.js b/tests/baselines/reference/generics1.js
index 2e8571cba2d..4136d401a12 100644
--- a/tests/baselines/reference/generics1.js
+++ b/tests/baselines/reference/generics1.js
@@ -16,10 +16,10 @@ var v7: G;                     // Error, no type arguments
 
 
 //// [generics1.js]
-var v1;
-var v2;
-var v3;
-var v4;
-var v5;
-var v6;
-var v7;
+var v1;// Ok 
+var v2;// Ok, equivalent to G<A, C> 
+var v3;// Error, A not valid argument for U 
+var v4;// Ok 
+var v5;// Error, any does not satisfy constraint B 
+var v6;// Error, wrong number of arguments 
+var v7;// Error, no type arguments 
diff --git a/tests/baselines/reference/generics1NoError.js b/tests/baselines/reference/generics1NoError.js
index 07b640bdba5..c0525777b4c 100644
--- a/tests/baselines/reference/generics1NoError.js
+++ b/tests/baselines/reference/generics1NoError.js
@@ -11,9 +11,9 @@ var v2: G<{ a: string }, C>;   // Ok, equivalent to G<A, C>
 var v4: G<G<A, B>, C>;         // Ok
 
 //// [generics1NoError.js]
-var v1;
-var v2;
-var v4;
+var v1;// Ok 
+var v2;// Ok, equivalent to G<A, C> 
+var v4;// Ok 
 
 
 //// [generics1NoError.d.ts]
diff --git a/tests/baselines/reference/generics2.js b/tests/baselines/reference/generics2.js
index cf8984fe3bd..6ac18835fee 100644
--- a/tests/baselines/reference/generics2.js
+++ b/tests/baselines/reference/generics2.js
@@ -23,10 +23,10 @@ var v7: G;                     // Error, no type arguments
 
 
 //// [generics2.js]
-var v1;
-var v2;
-var v3;
-var v4;
-var v5;
-var v6;
-var v7;
+var v1;// Ok 
+var v2;// Ok, equivalent to G<A, C> 
+var v3;// Error, A not valid argument for U 
+var v4;// Ok 
+var v5;// Error, any does not satisfy constraint B 
+var v6;// Error, wrong number of arguments 
+var v7;// Error, no type arguments 
diff --git a/tests/baselines/reference/generics2NoError.js b/tests/baselines/reference/generics2NoError.js
index 703eb2152c9..8b6011c498b 100644
--- a/tests/baselines/reference/generics2NoError.js
+++ b/tests/baselines/reference/generics2NoError.js
@@ -18,9 +18,9 @@ var v2: G<{ a: string }, C>;   // Ok, equivalent to G<A, C>
 var v4: G<G<A, B>, C>;         // Ok
 
 //// [generics2NoError.js]
-var v1;
-var v2;
-var v4;
+var v1;// Ok 
+var v2;// Ok, equivalent to G<A, C> 
+var v4;// Ok 
 
 
 //// [generics2NoError.d.ts]
diff --git a/tests/baselines/reference/generics5.js b/tests/baselines/reference/generics5.js
index 3020a9941e0..3898e72d962 100644
--- a/tests/baselines/reference/generics5.js
+++ b/tests/baselines/reference/generics5.js
@@ -13,4 +13,4 @@ var v3: G<A, A>;               // Error, A not valid argument for U
 
 
 //// [generics5.js]
-var v3;
+var v3;// Error, A not valid argument for U 
diff --git a/tests/baselines/reference/globalThis.js b/tests/baselines/reference/globalThis.js
index 1479658fdd5..f9e122b6e5b 100644
--- a/tests/baselines/reference/globalThis.js
+++ b/tests/baselines/reference/globalThis.js
@@ -2,4 +2,4 @@
 var __e = Math.E;  // should not generate 'this.Math.E'
 
 //// [globalThis.js]
-var __e = Math.E;
+var __e = Math.E;// should not generate 'this.Math.E' 
diff --git a/tests/baselines/reference/heterogeneousArrayLiterals.js b/tests/baselines/reference/heterogeneousArrayLiterals.js
index 048c88e04bb..603ea63ee56 100644
--- a/tests/baselines/reference/heterogeneousArrayLiterals.js
+++ b/tests/baselines/reference/heterogeneousArrayLiterals.js
@@ -139,20 +139,20 @@ var __extends = this.__extends || function (d, b) {
     d.prototype = new __();
 };
 // type of an array is the best common type of its elements (plus its contextual type if it exists)
-var a = [1, ''];
-var b = [1, null];
-var c = [1, '', null];
-var d = [{}, 1];
-var e = [{}, Object];
-var f = [[], [1]];
-var g = [[1], ['']];
-var h = [{ foo: 1, bar: '' }, { foo: 2 }];
-var i = [{ foo: 1, bar: '' }, { foo: '' }];
-var j = [function () { return 1; }, function () { return ''; }];
-var k = [function () { return 1; }, function () { return 1; }];
-var l = [function () { return 1; }, function () { return null; }];
-var m = [function () { return 1; }, function () { return ''; }, function () { return null; }];
-var n = [[function () { return 1; }], [function () { return ''; }]];
+var a = [1, ''];// {}[] 
+var b = [1, null];// number[] 
+var c = [1, '', null];// {}[] 
+var d = [{}, 1];// {}[] 
+var e = [{}, Object];// {}[] 
+var f = [[], [1]];// number[][] 
+var g = [[1], ['']];// {}[] 
+var h = [{ foo: 1, bar: '' }, { foo: 2 }];// {foo: number}[] 
+var i = [{ foo: 1, bar: '' }, { foo: '' }];// {}[] 
+var j = [function () { return 1; }, function () { return ''; }];// {}[] 
+var k = [function () { return 1; }, function () { return 1; }];// { (): number }[] 
+var l = [function () { return 1; }, function () { return null; }];// { (): any }[] 
+var m = [function () { return 1; }, function () { return ''; }, function () { return null; }];// { (): any }[] 
+var n = [[function () { return 1; }], [function () { return ''; }]];// {}[] 
 var Base = (function () {
     function Base() {
     }
@@ -177,16 +177,16 @@ var derived;
 var derived2;
 var Derived;
 (function (Derived) {
-    var h = [{ foo: base, basear: derived }, { foo: base }];
-    var i = [{ foo: base, basear: derived }, { foo: derived }];
-    var j = [function () { return base; }, function () { return derived; }];
-    var k = [function () { return base; }, function () { return 1; }];
-    var l = [function () { return base; }, function () { return null; }];
-    var m = [function () { return base; }, function () { return derived; }, function () { return null; }];
-    var n = [[function () { return base; }], [function () { return derived; }]];
-    var o = [derived, derived2];
-    var p = [derived, derived2, base];
-    var q = [[function () { return derived2; }], [function () { return derived; }]];
+    var h = [{ foo: base, basear: derived }, { foo: base }];// {foo: Base}[] 
+    var i = [{ foo: base, basear: derived }, { foo: derived }];// {foo: Derived}[] 
+    var j = [function () { return base; }, function () { return derived; }];// { {}: Base } 
+    var k = [function () { return base; }, function () { return 1; }];// {}[]~ 
+    var l = [function () { return base; }, function () { return null; }];// { (): any }[] 
+    var m = [function () { return base; }, function () { return derived; }, function () { return null; }];// { (): any }[] 
+    var n = [[function () { return base; }], [function () { return derived; }]];// { (): Base }[] 
+    var o = [derived, derived2];// {}[] 
+    var p = [derived, derived2, base];// Base[] 
+    var q = [[function () { return derived2; }], [function () { return derived; }]];// {}[] 
 })(Derived || (Derived = {}));
 var WithContextualType;
 (function (WithContextualType) {
@@ -197,47 +197,47 @@ var WithContextualType;
     var d = [function () { return derived; }, function () { return derived2; }];
 })(WithContextualType || (WithContextualType = {}));
 function foo(t, u) {
-    var a = [t, t];
-    var b = [t, null];
-    var c = [t, u];
-    var d = [t, 1];
-    var e = [function () { return t; }, function () { return u; }];
-    var f = [function () { return t; }, function () { return u; }, function () { return null; }];
+    var a = [t, t];// T[] 
+    var b = [t, null];// T[] 
+    var c = [t, u];// {}[] 
+    var d = [t, 1];// {}[] 
+    var e = [function () { return t; }, function () { return u; }];// {}[] 
+    var f = [function () { return t; }, function () { return u; }, function () { return null; }];// { (): any }[] 
 }
 function foo2(t, u) {
-    var a = [t, t];
-    var b = [t, null];
-    var c = [t, u];
-    var d = [t, 1];
-    var e = [function () { return t; }, function () { return u; }];
-    var f = [function () { return t; }, function () { return u; }, function () { return null; }];
-    var g = [t, base];
-    var h = [t, derived];
-    var i = [u, base];
-    var j = [u, derived];
+    var a = [t, t];// T[] 
+    var b = [t, null];// T[] 
+    var c = [t, u];// {}[] 
+    var d = [t, 1];// {}[] 
+    var e = [function () { return t; }, function () { return u; }];// {}[] 
+    var f = [function () { return t; }, function () { return u; }, function () { return null; }];// { (): any }[] 
+    var g = [t, base];// Base[] 
+    var h = [t, derived];// Derived[] 
+    var i = [u, base];// Base[] 
+    var j = [u, derived];// Derived[] 
 }
 function foo3(t, u) {
-    var a = [t, t];
-    var b = [t, null];
-    var c = [t, u];
-    var d = [t, 1];
-    var e = [function () { return t; }, function () { return u; }];
-    var f = [function () { return t; }, function () { return u; }, function () { return null; }];
-    var g = [t, base];
-    var h = [t, derived];
-    var i = [u, base];
-    var j = [u, derived];
+    var a = [t, t];// T[] 
+    var b = [t, null];// T[] 
+    var c = [t, u];// {}[] 
+    var d = [t, 1];// {}[] 
+    var e = [function () { return t; }, function () { return u; }];// {}[] 
+    var f = [function () { return t; }, function () { return u; }, function () { return null; }];// { (): any }[] 
+    var g = [t, base];// Base[] 
+    var h = [t, derived];// Derived[] 
+    var i = [u, base];// Base[] 
+    var j = [u, derived];// Derived[] 
 }
 function foo4(t, u) {
-    var a = [t, t];
-    var b = [t, null];
-    var c = [t, u];
-    var d = [t, 1];
-    var e = [function () { return t; }, function () { return u; }];
-    var f = [function () { return t; }, function () { return u; }, function () { return null; }];
-    var g = [t, base];
-    var h = [t, derived];
-    var i = [u, base];
-    var j = [u, derived];
+    var a = [t, t];// T[] 
+    var b = [t, null];// T[] 
+    var c = [t, u];// BUG 821629 
+    var d = [t, 1];// {}[] 
+    var e = [function () { return t; }, function () { return u; }];// {}[] 
+    var f = [function () { return t; }, function () { return u; }, function () { return null; }];// { (): any }[] 
+    var g = [t, base];// Base[] 
+    var h = [t, derived];// Derived[] 
+    var i = [u, base];// Base[] 
+    var j = [u, derived];// Derived[] 
     var k = [t, u];
 }
diff --git a/tests/baselines/reference/implementPublicPropertyAsPrivate.js b/tests/baselines/reference/implementPublicPropertyAsPrivate.js
index 0a57704553f..613bcc71722 100644
--- a/tests/baselines/reference/implementPublicPropertyAsPrivate.js
+++ b/tests/baselines/reference/implementPublicPropertyAsPrivate.js
@@ -9,7 +9,7 @@ class C implements I {
 //// [implementPublicPropertyAsPrivate.js]
 var C = (function () {
     function C() {
-        this.x = 0;
+        this.x = 0;// should raise error at class decl 
     }
     return C;
 })();
diff --git a/tests/baselines/reference/implementingAnInterfaceExtendingClassWithPrivates2.js b/tests/baselines/reference/implementingAnInterfaceExtendingClassWithPrivates2.js
index 34b84a9f44f..35a24d32aaf 100644
--- a/tests/baselines/reference/implementingAnInterfaceExtendingClassWithPrivates2.js
+++ b/tests/baselines/reference/implementingAnInterfaceExtendingClassWithPrivates2.js
@@ -179,8 +179,8 @@ var M2;
     })(Foo);
     var b;
     var r1 = b.z;
-    var r2 = b.x;
-    var r3 = b.y;
+    var r2 = b.x;// error 
+    var r3 = b.y;// error 
     var Bar2 = (function (_super) {
         __extends(Bar2, _super);
         function Bar2() {
diff --git a/tests/baselines/reference/implicitAnyDeclareFunctionExprWithoutFormalType.js b/tests/baselines/reference/implicitAnyDeclareFunctionExprWithoutFormalType.js
index 33dad54f8ea..fd9668952b7 100644
--- a/tests/baselines/reference/implicitAnyDeclareFunctionExprWithoutFormalType.js
+++ b/tests/baselines/reference/implicitAnyDeclareFunctionExprWithoutFormalType.js
@@ -20,9 +20,9 @@ var lambda10 = function temp1() { return 5; }
 //// [implicitAnyDeclareFunctionExprWithoutFormalType.js]
 // these should be errors for implicit any parameter
 var lambda = function (l1) {
-};
+};// Error at "l1" 
 var lambd2 = function (ll1, ll2) {
-};
+}// Error at "ll1" // Error at "ll1" ;// Error at "ll1" 
 var lamda3 = function myLambda3(myParam) {
 };
 var lamda4 = function () {
diff --git a/tests/baselines/reference/implicitAnyDeclareMemberWithoutType2.js b/tests/baselines/reference/implicitAnyDeclareMemberWithoutType2.js
index 8a413ad1737..37b4d63b4f5 100644
--- a/tests/baselines/reference/implicitAnyDeclareMemberWithoutType2.js
+++ b/tests/baselines/reference/implicitAnyDeclareMemberWithoutType2.js
@@ -13,9 +13,9 @@ class C {
 // this should be an error
 var C = (function () {
     function C(c1, c2, c3) {
-        this.x = null;
-    }
+        this.x = null;// error at "x" 
+    }// error at "c1, c2" 
     C.prototype.funcOfC = function (f1, f2, f3) {
-    };
+    };// error at "f1,f2" 
     return C;
 })();
diff --git a/tests/baselines/reference/implicitAnyDeclareTypePropertyWithoutType.js b/tests/baselines/reference/implicitAnyDeclareTypePropertyWithoutType.js
index 8e9f91fa138..d4b9e29701e 100644
--- a/tests/baselines/reference/implicitAnyDeclareTypePropertyWithoutType.js
+++ b/tests/baselines/reference/implicitAnyDeclareTypePropertyWithoutType.js
@@ -24,11 +24,11 @@ var C = (function () {
     return C;
 })();
 // this should be an error
-var x;
-var x1;
-var x11;
-var x2;
-var x3;
+var x// error at "y,z" ;// error at "y,z" 
+var x1;// error at "z1"  
+var x11;// error at "new" 
+var x2;// error at "y2" 
+var x3;// error at "y3" 
 // this should not be an error
 var bar;
 var foo;
diff --git a/tests/baselines/reference/implicitAnyDeclareVariablesWithoutTypeAndInit.js b/tests/baselines/reference/implicitAnyDeclareVariablesWithoutTypeAndInit.js
index fd2bb9e103f..fbf5e8b0276 100644
--- a/tests/baselines/reference/implicitAnyDeclareVariablesWithoutTypeAndInit.js
+++ b/tests/baselines/reference/implicitAnyDeclareVariablesWithoutTypeAndInit.js
@@ -13,7 +13,7 @@ var x1: any; var y1 = new x1;
 
 //// [implicitAnyDeclareVariablesWithoutTypeAndInit.js]
 // this should be an error
-var x;
+var x;// error at "x" 
 function func(k) {
 }
 ;
diff --git a/tests/baselines/reference/implicitAnyFunctionInvocationWithAnyArguements.js b/tests/baselines/reference/implicitAnyFunctionInvocationWithAnyArguements.js
index eeb13957cdf..acf9b46a818 100644
--- a/tests/baselines/reference/implicitAnyFunctionInvocationWithAnyArguements.js
+++ b/tests/baselines/reference/implicitAnyFunctionInvocationWithAnyArguements.js
@@ -37,12 +37,12 @@ var newC2 = new C(<any>[], null)
 
 //// [implicitAnyFunctionInvocationWithAnyArguements.js]
 // this should be errors
-var arg0 = null;
-var anyArray = [null, undefined];
-var objL;
+var arg0 = null;// error at "arg0" 
+var anyArray = [null, undefined];// error at array literal 
+var objL// error at "y,z" ;// error at "y,z" 
 var funcL;
 function temp1(arg1) {
-}
+}// error at "temp1" 
 function testFunctionExprC(subReplace) {
 }
 function testFunctionExprC2(eq) {
diff --git a/tests/baselines/reference/implicitAnyFunctionReturnNullOrUndefined.js b/tests/baselines/reference/implicitAnyFunctionReturnNullOrUndefined.js
index 6195d17970d..025c4aac13d 100644
--- a/tests/baselines/reference/implicitAnyFunctionReturnNullOrUndefined.js
+++ b/tests/baselines/reference/implicitAnyFunctionReturnNullOrUndefined.js
@@ -28,10 +28,10 @@ undefinedWidenFunction();
 // this should be an error
 function nullWidenFunction() {
     return null;
-}
+}// error at "nullWidenFunction" 
 function undefinedWidenFunction() {
     return undefined;
-}
+}// error at "undefinedWidenFunction" 
 var C = (function () {
     function C() {
     }
diff --git a/tests/baselines/reference/implicitAnyNewExprLackConstructorSignature.js b/tests/baselines/reference/implicitAnyNewExprLackConstructorSignature.js
index c48d967dc9b..8758b6e1c41 100644
--- a/tests/baselines/reference/implicitAnyNewExprLackConstructorSignature.js
+++ b/tests/baselines/reference/implicitAnyNewExprLackConstructorSignature.js
@@ -6,4 +6,4 @@ var x: any = new Point();  // error at "new"
 function Point() {
     this.x = 3;
 }
-var x = new Point();
+var x = new Point();// error at "new" 
diff --git a/tests/baselines/reference/implicitAnyWidenToAny.js b/tests/baselines/reference/implicitAnyWidenToAny.js
index 75b34cee969..be6c2ba02fc 100644
--- a/tests/baselines/reference/implicitAnyWidenToAny.js
+++ b/tests/baselines/reference/implicitAnyWidenToAny.js
@@ -29,10 +29,10 @@ var obj1 = anyReturnFunc();
 
 //// [implicitAnyWidenToAny.js]
 // these should be errors
-var x = null;
-var x1 = undefined;
-var widenArray = [null, undefined];
-var emptyArray = [];
+var x = null;// error at "x" 
+var x1 = undefined;// error at "x1" 
+var widenArray = [null, undefined];// error at "widenArray" 
+var emptyArray = [];// error at "emptyArray" 
 // these should not be error
 var AnimalObj = (function () {
     function AnimalObj() {
diff --git a/tests/baselines/reference/importDecl.js b/tests/baselines/reference/importDecl.js
index 5073753f3cb..58f423ae75e 100644
--- a/tests/baselines/reference/importDecl.js
+++ b/tests/baselines/reference/importDecl.js
@@ -140,7 +140,7 @@ exports.foo2 = foo2;
 ///<reference path='importDecl_require2.ts'/>
 ///<reference path='importDecl_require3.ts'/>
 ///<reference path='importDecl_require4.ts'/>
-var m4 = require("importDecl_require");
+var m4 = require("importDecl_require");// Emit used 
 exports.x4 = m4.x;
 exports.d4 = m4.d;
 exports.f4 = m4.foo();
@@ -172,7 +172,7 @@ var usePrivate_m4_m1 = exports.usePrivate_m4_m1;
 var m5 = require("importDecl_require4");
 exports.d = m5.foo2();
 // Do not emit multiple used import statements
-var multiImport_m4 = require("importDecl_require");
+var multiImport_m4 = require("importDecl_require");// Emit used 
 exports.useMultiImport_m4_x4 = multiImport_m4.x;
 exports.useMultiImport_m4_d4 = multiImport_m4.d;
 exports.useMultiImport_m4_f4 = multiImport_m4.foo();
diff --git a/tests/baselines/reference/importImportOnlyModule.js b/tests/baselines/reference/importImportOnlyModule.js
index 31efc6698f8..a003a3f2a03 100644
--- a/tests/baselines/reference/importImportOnlyModule.js
+++ b/tests/baselines/reference/importImportOnlyModule.js
@@ -28,9 +28,9 @@ define(["require", "exports"], function (require, exports) {
 });
 //// [foo_1.js]
 define(["require", "exports"], function (require, exports) {
-    var answer = 42;
+    var answer = 42;// No exports 
 });
 //// [foo_2.js]
 define(["require", "exports", "./foo_1"], function (require, exports, foo) {
-    var x = foo;
+    var x = foo;// Cause a runtime dependency 
 });
diff --git a/tests/baselines/reference/importOnAliasedIdentifiers.js b/tests/baselines/reference/importOnAliasedIdentifiers.js
index 8f92bed3350..4d6607d936b 100644
--- a/tests/baselines/reference/importOnAliasedIdentifiers.js
+++ b/tests/baselines/reference/importOnAliasedIdentifiers.js
@@ -17,6 +17,6 @@ var A;
 })(A || (A = {}));
 var B;
 (function (B) {
-    var Z = A.X;
+    var Z = A.X;// Alias for both type and member A.X 
     var v = Z;
 })(B || (B = {}));
diff --git a/tests/baselines/reference/importTsBeforeDTs.js b/tests/baselines/reference/importTsBeforeDTs.js
index 44908ac8d8f..63afde26bdc 100644
--- a/tests/baselines/reference/importTsBeforeDTs.js
+++ b/tests/baselines/reference/importTsBeforeDTs.js
@@ -17,5 +17,5 @@ var z2 = foo.y + 10; // Should resolve
 exports.y = 42;
 //// [foo_1.js]
 var foo = require("./foo_0");
-var z1 = foo.x + 10;
-var z2 = foo.y + 10;
+var z1 = foo.x + 10;// Should error, as .ts preferred over .d.ts 
+var z2 = foo.y + 10;// Should resolve 
diff --git a/tests/baselines/reference/indexIntoArraySubclass.js b/tests/baselines/reference/indexIntoArraySubclass.js
index 051ec813465..b9020f6261f 100644
--- a/tests/baselines/reference/indexIntoArraySubclass.js
+++ b/tests/baselines/reference/indexIntoArraySubclass.js
@@ -6,5 +6,5 @@ r = 0; //error
 
 //// [indexIntoArraySubclass.js]
 var x2;
-var r = x2[0];
+var r = x2[0];// string 
 r = 0;
diff --git a/tests/baselines/reference/indexSignatureTypeInference.js b/tests/baselines/reference/indexSignatureTypeInference.js
index a4f79801258..6b80b1e59e9 100644
--- a/tests/baselines/reference/indexSignatureTypeInference.js
+++ b/tests/baselines/reference/indexSignatureTypeInference.js
@@ -24,7 +24,7 @@ var v1 = stringMapToArray(stringMap);  // Ok
 var numberMap;
 var stringMap;
 var v1;
-var v1 = numberMapToArray(numberMap);
-var v1 = numberMapToArray(stringMap);
-var v1 = stringMapToArray(numberMap);
-var v1 = stringMapToArray(stringMap);
+var v1 = numberMapToArray(numberMap);// Ok 
+var v1 = numberMapToArray(stringMap);// Ok 
+var v1 = stringMapToArray(numberMap);// Error expected here 
+var v1 = stringMapToArray(stringMap);// Ok 
diff --git a/tests/baselines/reference/indexSignaturesInferentialTyping.js b/tests/baselines/reference/indexSignaturesInferentialTyping.js
index c9cc7293a1a..93596031b11 100644
--- a/tests/baselines/reference/indexSignaturesInferentialTyping.js
+++ b/tests/baselines/reference/indexSignaturesInferentialTyping.js
@@ -15,7 +15,7 @@ function foo(items) {
 function bar(items) {
     return undefined;
 }
-var x1 = foo({ 0: 0, 1: 1 });
+var x1 = foo({ 0: 0, 1: 1 });// type should be number 
 var x2 = foo({ zero: 0, one: 1 });
 var x3 = bar({ 0: 0, 1: 1 });
-var x4 = bar({ zero: 0, one: 1 });
+var x4 = bar({ zero: 0, one: 1 });// type should be number 
diff --git a/tests/baselines/reference/indexer3.js b/tests/baselines/reference/indexer3.js
index 85637e2ef20..7b84415d1c8 100644
--- a/tests/baselines/reference/indexer3.js
+++ b/tests/baselines/reference/indexer3.js
@@ -4,4 +4,4 @@ var r: Date = dateMap["hello"] // result type includes indexer using BCT
 
 //// [indexer3.js]
 var dateMap = {};
-var r = dateMap["hello"];
+var r = dateMap["hello"]// result type includes indexer using BCT ;// result type includes indexer using BCT 
diff --git a/tests/baselines/reference/inferentialTypingWithFunctionTypeZip.js b/tests/baselines/reference/inferentialTypingWithFunctionTypeZip.js
index e3150d457c1..1f0fc9871a1 100644
--- a/tests/baselines/reference/inferentialTypingWithFunctionTypeZip.js
+++ b/tests/baselines/reference/inferentialTypingWithFunctionTypeZip.js
@@ -8,4 +8,4 @@ var i = result[0].x; // number
 var pair;
 var zipWith;
 var result = zipWith([1, 2], ['a', 'b'], pair);
-var i = result[0].x;
+var i = result[0].x;// number 
diff --git a/tests/baselines/reference/inheritanceOfGenericConstructorMethod1.js b/tests/baselines/reference/inheritanceOfGenericConstructorMethod1.js
index ca5f5c497b8..e93ad4cb886 100644
--- a/tests/baselines/reference/inheritanceOfGenericConstructorMethod1.js
+++ b/tests/baselines/reference/inheritanceOfGenericConstructorMethod1.js
@@ -27,6 +27,6 @@ var B = (function (_super) {
     return B;
 })(A);
 var a = new A();
-var b1 = new B();
-var b2 = new B();
-var b3 = new B();
+var b1 = new B();// no error 
+var b2 = new B();// no error 
+var b3 = new B();// error, could not select overload for 'new' expression 
diff --git a/tests/baselines/reference/inheritanceOfGenericConstructorMethod2.js b/tests/baselines/reference/inheritanceOfGenericConstructorMethod2.js
index 0e2fc8c7322..c393e9a1c39 100644
--- a/tests/baselines/reference/inheritanceOfGenericConstructorMethod2.js
+++ b/tests/baselines/reference/inheritanceOfGenericConstructorMethod2.js
@@ -55,7 +55,7 @@ var N;
     })(M.C2);
     N.D2 = D2;
 })(N || (N = {}));
-var c = new M.C2();
-var n = new N.D1();
-var n2 = new N.D2();
-var n3 = new N.D2();
+var c = new M.C2();// no error 
+var n = new N.D1();// no error 
+var n2 = new N.D2();// error 
+var n3 = new N.D2();// no error, D2<any> 
diff --git a/tests/baselines/reference/innerOverloads.js b/tests/baselines/reference/innerOverloads.js
index 3249ca0da26..e473d822727 100644
--- a/tests/baselines/reference/innerOverloads.js
+++ b/tests/baselines/reference/innerOverloads.js
@@ -19,4 +19,4 @@ function outer() {
     }
     return inner(0);
 }
-var x = outer();
+var x = outer();// should work 
diff --git a/tests/baselines/reference/instanceMemberAssignsToClassPrototype.js b/tests/baselines/reference/instanceMemberAssignsToClassPrototype.js
index 8ba9f1ea983..3f5203de077 100644
--- a/tests/baselines/reference/instanceMemberAssignsToClassPrototype.js
+++ b/tests/baselines/reference/instanceMemberAssignsToClassPrototype.js
@@ -22,7 +22,7 @@ var C = (function () {
     };
     C.prototype.bar = function (x) {
         C.prototype.bar = function () {
-        };
+        }// error ;
         C.prototype.bar = function (x) { return x; };
         C.prototype.bar = function (x) { return 1; };
         return 1;
diff --git a/tests/baselines/reference/interfaceAssignmentCompat.js b/tests/baselines/reference/interfaceAssignmentCompat.js
index d85dae45159..7ee958c16de 100644
--- a/tests/baselines/reference/interfaceAssignmentCompat.js
+++ b/tests/baselines/reference/interfaceAssignmentCompat.js
@@ -77,7 +77,7 @@ var M;
         x[2] = { color: 0 /* Green */ };
         x = x.sort(CompareYeux);
         // type of z inferred from specialized array type
-        var z = x.sort(CompareEyes);
+        var z = x.sort(CompareEyes);// ok 
         for (var i = 0, len = z.length; i < len; i++) {
             result += ((Color._map[z[i].color]) + "\r\n");
         }
diff --git a/tests/baselines/reference/interfaceExtendingClassWithPrivates.js b/tests/baselines/reference/interfaceExtendingClassWithPrivates.js
index 5304068fdd8..ab3f2ef22d9 100644
--- a/tests/baselines/reference/interfaceExtendingClassWithPrivates.js
+++ b/tests/baselines/reference/interfaceExtendingClassWithPrivates.js
@@ -23,4 +23,4 @@ var Foo = (function () {
 })();
 var i;
 var r = i.y;
-var r2 = i.x;
+var r2 = i.x;// error 
diff --git a/tests/baselines/reference/interfaceExtendingClassWithPrivates2.js b/tests/baselines/reference/interfaceExtendingClassWithPrivates2.js
index 06c1c040a96..10514413003 100644
--- a/tests/baselines/reference/interfaceExtendingClassWithPrivates2.js
+++ b/tests/baselines/reference/interfaceExtendingClassWithPrivates2.js
@@ -45,5 +45,5 @@ var Baz = (function () {
 })();
 var i;
 var r = i.z;
-var r2 = i.x;
-var r3 = i.y;
+var r2 = i.x;// error 
+var r3 = i.y;// error 
diff --git a/tests/baselines/reference/intrinsics.js b/tests/baselines/reference/intrinsics.js
index c1cea70db86..29da13175e5 100644
--- a/tests/baselines/reference/intrinsics.js
+++ b/tests/baselines/reference/intrinsics.js
@@ -16,7 +16,7 @@ class Foo<__proto__> { }
 var foo: (__proto__: number) => void;
 
 //// [intrinsics.js]
-var hasOwnProperty;
+var hasOwnProperty;// Error 
 var m1;
 (function (m1) {
     m1.__proto__;
diff --git a/tests/baselines/reference/invalidBooleanAssignments.js b/tests/baselines/reference/invalidBooleanAssignments.js
index 803f553c4d2..99b33bbc93c 100644
--- a/tests/baselines/reference/invalidBooleanAssignments.js
+++ b/tests/baselines/reference/invalidBooleanAssignments.js
@@ -45,7 +45,7 @@ var C = (function () {
 var f = x;
 var g = x;
 var h = x;
-var h2 = x;
+var h2 = x;// no error 
 var M;
 (function (M) {
     M.a = 1;
diff --git a/tests/baselines/reference/invalidInstantiatedModule.js b/tests/baselines/reference/invalidInstantiatedModule.js
index c180d1c7b4a..ea26d2263d1 100644
--- a/tests/baselines/reference/invalidInstantiatedModule.js
+++ b/tests/baselines/reference/invalidInstantiatedModule.js
@@ -24,11 +24,11 @@ var M;
         return Point;
     })();
     M.Point = Point;
-    M.Point = 1;
+    M.Point = 1;// Error 
 })(M || (M = {}));
 var M2;
 (function (M2) {
     M2.Point = 1;
 })(M2 || (M2 = {}));
 var m = M2;
-var p;
+var p;// Error 
diff --git a/tests/baselines/reference/invalidNestedModules.js b/tests/baselines/reference/invalidNestedModules.js
index ece1aeeaa7f..9ba817885ed 100644
--- a/tests/baselines/reference/invalidNestedModules.js
+++ b/tests/baselines/reference/invalidNestedModules.js
@@ -72,7 +72,7 @@ var M2;
 var M2;
 (function (M2) {
     (function (X) {
-        X.Point;
+        X.Point;// Error 
     })(M2.X || (M2.X = {}));
     var X = M2.X;
 })(M2 || (M2 = {}));
diff --git a/tests/baselines/reference/invalidReturnStatements.js b/tests/baselines/reference/invalidReturnStatements.js
index 26e96e82df5..b7394e95823 100644
--- a/tests/baselines/reference/invalidReturnStatements.js
+++ b/tests/baselines/reference/invalidReturnStatements.js
@@ -37,7 +37,7 @@ function fn3() {
 function fn4() {
 }
 function fn7() {
-}
+}// should be valid: any includes void 
 var C = (function () {
     function C() {
     }
diff --git a/tests/baselines/reference/invalidSymbolInTypeParameter1.js b/tests/baselines/reference/invalidSymbolInTypeParameter1.js
index 1530b506867..c198bed62ce 100644
--- a/tests/baselines/reference/invalidSymbolInTypeParameter1.js
+++ b/tests/baselines/reference/invalidSymbolInTypeParameter1.js
@@ -6,5 +6,5 @@ function test() {
 
 //// [invalidSymbolInTypeParameter1.js]
 function test() {
-    var cats = new Array();
+    var cats = new Array();// WAWA is not a valid type 
 }
diff --git a/tests/baselines/reference/logicalOrOperatorWithEveryType.js b/tests/baselines/reference/logicalOrOperatorWithEveryType.js
index 31d19c5a802..593e084b20a 100644
--- a/tests/baselines/reference/logicalOrOperatorWithEveryType.js
+++ b/tests/baselines/reference/logicalOrOperatorWithEveryType.js
@@ -144,103 +144,103 @@ var a5;
 var a6;
 var a7;
 var a8;
-var ra1 = a1 || a1;
-var ra2 = a2 || a1;
-var ra3 = a3 || a1;
-var ra4 = a4 || a1;
-var ra5 = a5 || a1;
-var ra6 = a6 || a1;
-var ra7 = a7 || a1;
-var ra8 = a8 || a1;
-var ra9 = null || a1;
-var ra10 = undefined || a1;
-var rb1 = a1 || a2;
-var rb2 = a2 || a2;
-var rb3 = a3 || a2;
-var rb4 = a4 || a2;
-var rb5 = a5 || a2;
-var rb6 = a6 || a2;
-var rb7 = a7 || a2;
-var rb8 = a8 || a2;
-var rb9 = null || a2;
-var rb10 = undefined || a2;
-var rc1 = a1 || a3;
-var rc2 = a2 || a3;
-var rc3 = a3 || a3;
-var rc4 = a4 || a3;
-var rc5 = a5 || a3;
-var rc6 = a6 || a3;
-var rc7 = a7 || a3;
-var rc8 = a8 || a3;
-var rc9 = null || a3;
-var rc10 = undefined || a3;
-var rd1 = a1 || a4;
-var rd2 = a2 || a4;
-var rd3 = a3 || a4;
-var rd4 = a4 || a4;
-var rd5 = a5 || a4;
-var rd6 = a6 || a4;
-var rd7 = a7 || a4;
-var rd8 = a8 || a4;
-var rd9 = null || a4;
-var rd10 = undefined || a4;
-var re1 = a1 || a5;
-var re2 = a2 || a5;
-var re3 = a3 || a5;
-var re4 = a4 || a5;
-var re5 = a5 || a5;
-var re6 = a6 || a5;
-var re7 = a7 || a5;
-var re8 = a8 || a5;
-var re9 = null || a5;
-var re10 = undefined || a5;
-var rg1 = a1 || a6;
-var rg2 = a2 || a6;
-var rg3 = a3 || a6;
-var rg4 = a4 || a6;
-var rg5 = a5 || a6;
-var rg6 = a6 || a6;
-var rg7 = a7 || a6;
-var rg8 = a8 || a6;
-var rg9 = null || a6;
-var rg10 = undefined || a6;
-var rh1 = a1 || a7;
-var rh2 = a2 || a7;
-var rh3 = a3 || a7;
-var rh4 = a4 || a7;
-var rh5 = a5 || a7;
-var rh6 = a6 || a7;
-var rh7 = a7 || a7;
-var rh8 = a8 || a7;
-var rh9 = null || a7;
-var rh10 = undefined || a7;
-var ri1 = a1 || a8;
-var ri2 = a2 || a8;
-var ri3 = a3 || a8;
-var ri4 = a4 || a8;
-var ri5 = a5 || a8;
-var ri6 = a6 || a8;
-var ri7 = a7 || a8;
-var ri8 = a8 || a8;
-var ri9 = null || a8;
-var ri10 = undefined || a8;
-var rj1 = a1 || null;
-var rj2 = a2 || null;
-var rj3 = a3 || null;
-var rj4 = a4 || null;
-var rj5 = a5 || null;
-var rj6 = a6 || null;
-var rj7 = a7 || null;
-var rj8 = a8 || null;
-var rj9 = null || null;
-var rj10 = undefined || null;
-var rf1 = a1 || undefined;
-var rf2 = a2 || undefined;
-var rf3 = a3 || undefined;
-var rf4 = a4 || undefined;
-var rf5 = a5 || undefined;
-var rf6 = a6 || undefined;
-var rf7 = a7 || undefined;
-var rf8 = a8 || undefined;
-var rf9 = null || undefined;
-var rf10 = undefined || undefined;
+var ra1 = a1 || a1;// any       || any is any 
+var ra2 = a2 || a1;// boolean   || any is any 
+var ra3 = a3 || a1;// number    || any is any 
+var ra4 = a4 || a1;// string    || any is any 
+var ra5 = a5 || a1;// void      || any is any 
+var ra6 = a6 || a1;// enum      || any is any 
+var ra7 = a7 || a1;// object    || any is any 
+var ra8 = a8 || a1;// array     || any is any 
+var ra9 = null || a1;// null      || any is any 
+var ra10 = undefined || a1;// undefined || any is any 
+var rb1 = a1 || a2;// any       || boolean is any 
+var rb2 = a2 || a2;// boolean   || boolean is boolean 
+var rb3 = a3 || a2;// number    || boolean is {} 
+var rb4 = a4 || a2;// string    || boolean is {} 
+var rb5 = a5 || a2;// void      || boolean is {} 
+var rb6 = a6 || a2;// enum      || boolean is {} 
+var rb7 = a7 || a2;// object    || boolean is {} 
+var rb8 = a8 || a2;// array     || boolean is {} 
+var rb9 = null || a2;// null      || boolean is boolean 
+var rb10 = undefined || a2;// undefined || boolean is boolean 
+var rc1 = a1 || a3;// any       || number is any 
+var rc2 = a2 || a3;// boolean   || number is {} 
+var rc3 = a3 || a3;// number    || number is number 
+var rc4 = a4 || a3;// string    || number is {} 
+var rc5 = a5 || a3;// void      || number is {} 
+var rc6 = a6 || a3;// enum      || number is number 
+var rc7 = a7 || a3;// object    || number is {} 
+var rc8 = a8 || a3;// array     || number is {} 
+var rc9 = null || a3;// null      || number is number 
+var rc10 = undefined || a3;// undefined || number is number 
+var rd1 = a1 || a4;// any       || string is any 
+var rd2 = a2 || a4;// boolean   || string is {} 
+var rd3 = a3 || a4;// number    || string is {} 
+var rd4 = a4 || a4;// string    || string is string 
+var rd5 = a5 || a4;// void      || string is {} 
+var rd6 = a6 || a4;// enum      || string is {} 
+var rd7 = a7 || a4;// object    || string is {} 
+var rd8 = a8 || a4;// array     || string is {} 
+var rd9 = null || a4;// null      || string is string 
+var rd10 = undefined || a4;// undefined || string is string 
+var re1 = a1 || a5;// any       || void is any 
+var re2 = a2 || a5;// boolean   || void is {} 
+var re3 = a3 || a5;// number    || void is {} 
+var re4 = a4 || a5;// string    || void is {} 
+var re5 = a5 || a5;// void      || void is void 
+var re6 = a6 || a5;// enum      || void is {} 
+var re7 = a7 || a5;// object    || void is {} 
+var re8 = a8 || a5;// array     || void is {} 
+var re9 = null || a5;// null      || void is void 
+var re10 = undefined || a5;// undefined || void is void 
+var rg1 = a1 || a6;// any       || enum is any 
+var rg2 = a2 || a6;// boolean   || enum is {} 
+var rg3 = a3 || a6;// number    || enum is number 
+var rg4 = a4 || a6;// string    || enum is {} 
+var rg5 = a5 || a6;// void      || enum is {} 
+var rg6 = a6 || a6;// enum      || enum is E 
+var rg7 = a7 || a6;// object    || enum is {} 
+var rg8 = a8 || a6;// array     || enum is {} 
+var rg9 = null || a6;// null      || enum is E 
+var rg10 = undefined || a6;// undefined || enum is E 
+var rh1 = a1 || a7;// any       || object is any 
+var rh2 = a2 || a7;// boolean   || object is {} 
+var rh3 = a3 || a7;// number    || object is {} 
+var rh4 = a4 || a7;// string    || object is {} 
+var rh5 = a5 || a7;// void      || object is {} 
+var rh6 = a6 || a7;// enum      || object is {} 
+var rh7 = a7 || a7;// object    || object is object 
+var rh8 = a8 || a7;// array     || object is {} 
+var rh9 = null || a7;// null      || object is object 
+var rh10 = undefined || a7;// undefined || object is object 
+var ri1 = a1 || a8;// any       || array is any 
+var ri2 = a2 || a8;// boolean   || array is {} 
+var ri3 = a3 || a8;// number    || array is {} 
+var ri4 = a4 || a8;// string    || array is {} 
+var ri5 = a5 || a8;// void      || array is {} 
+var ri6 = a6 || a8;// enum      || array is {} 
+var ri7 = a7 || a8;// object    || array is {} 
+var ri8 = a8 || a8;// array     || array is array 
+var ri9 = null || a8;// null      || array is array 
+var ri10 = undefined || a8;// undefined || array is array 
+var rj1 = a1 || null;// any       || null is any 
+var rj2 = a2 || null;// boolean   || null is boolean 
+var rj3 = a3 || null;// number    || null is number 
+var rj4 = a4 || null;// string    || null is string 
+var rj5 = a5 || null;// void      || null is void 
+var rj6 = a6 || null;// enum      || null is E 
+var rj7 = a7 || null;// object    || null is object 
+var rj8 = a8 || null;// array     || null is array 
+var rj9 = null || null;// null      || null is any 
+var rj10 = undefined || null;// undefined || null is any 
+var rf1 = a1 || undefined;// any       || undefined is any 
+var rf2 = a2 || undefined;// boolean   || undefined is boolean 
+var rf3 = a3 || undefined;// number    || undefined is number 
+var rf4 = a4 || undefined;// string    || undefined is string 
+var rf5 = a5 || undefined;// void      || undefined is void 
+var rf6 = a6 || undefined;// enum      || undefined is E 
+var rf7 = a7 || undefined;// object    || undefined is object 
+var rf8 = a8 || undefined;// array     || undefined is array 
+var rf9 = null || undefined;// null      || undefined is any 
+var rf10 = undefined || undefined;// undefined || undefined is any 
diff --git a/tests/baselines/reference/memberFunctionsWithPrivateOverloads.js b/tests/baselines/reference/memberFunctionsWithPrivateOverloads.js
index cfd5d46a4a1..bb8f163cecc 100644
--- a/tests/baselines/reference/memberFunctionsWithPrivateOverloads.js
+++ b/tests/baselines/reference/memberFunctionsWithPrivateOverloads.js
@@ -77,8 +77,8 @@ var D = (function () {
     return D;
 })();
 var c;
-var r = c.foo(1);
+var r = c.foo(1);// error 
 var d;
-var r2 = d.foo(2);
-var r3 = C.foo(1);
-var r4 = D.bar('');
+var r2 = d.foo(2);// error 
+var r3 = C.foo(1);// error 
+var r4 = D.bar('');// error 
diff --git a/tests/baselines/reference/memberFunctionsWithPublicPrivateOverloads.js b/tests/baselines/reference/memberFunctionsWithPublicPrivateOverloads.js
index 2f4ff52b541..a4d26042026 100644
--- a/tests/baselines/reference/memberFunctionsWithPublicPrivateOverloads.js
+++ b/tests/baselines/reference/memberFunctionsWithPublicPrivateOverloads.js
@@ -73,6 +73,6 @@ var D = (function () {
     return D;
 })();
 var c;
-var r = c.foo(1);
+var r = c.foo(1);// error 
 var d;
-var r2 = d.foo(2);
+var r2 = d.foo(2);// error 
diff --git a/tests/baselines/reference/mergeThreeInterfaces.js b/tests/baselines/reference/mergeThreeInterfaces.js
index bea7efa1eb6..b01e3d581a4 100644
--- a/tests/baselines/reference/mergeThreeInterfaces.js
+++ b/tests/baselines/reference/mergeThreeInterfaces.js
@@ -93,13 +93,13 @@ var M;
     var a;
     var r1 = a.foo;
     // BUG 856491
-    var r2 = a.bar;
+    var r2 = a.bar;// any, should be number 
     // BUG 856491
-    var r3 = a.baz;
+    var r3 = a.baz;// any, should be boolean 
     var b;
     var r4 = b.foo;
     // BUG 856491
-    var r5 = b.bar;
+    var r5 = b.bar;// any, should be number 
     // BUG 856491
-    var r6 = b.baz;
+    var r6 = b.baz;// any, should be boolean 
 })(M || (M = {}));
diff --git a/tests/baselines/reference/mergeTwoInterfaces.js b/tests/baselines/reference/mergeTwoInterfaces.js
index 03e26daacb0..c71ca36bc05 100644
--- a/tests/baselines/reference/mergeTwoInterfaces.js
+++ b/tests/baselines/reference/mergeTwoInterfaces.js
@@ -70,9 +70,9 @@ var M;
     var a;
     var r1 = a.foo;
     // BUG 856491
-    var r2 = a.bar;
+    var r2 = a.bar;// any, should be number 
     var b;
     var r3 = b.foo;
     // BUG 856491
-    var r4 = b.bar;
+    var r4 = b.bar;// any, should be string 
 })(M || (M = {}));
diff --git a/tests/baselines/reference/mergedDeclarations3.js b/tests/baselines/reference/mergedDeclarations3.js
index 2c606288a98..fcd99d4b7a8 100644
--- a/tests/baselines/reference/mergedDeclarations3.js
+++ b/tests/baselines/reference/mergedDeclarations3.js
@@ -55,7 +55,7 @@ var M;
     })(M.Color || (M.Color = {}));
     var Color = M.Color;
 })(M || (M = {}));
-var p = M.Color.Blue;
+var p = M.Color.Blue;// ok 
 var M;
 (function (M) {
     function foo() {
diff --git a/tests/baselines/reference/mergedInterfacesWithInheritedPrivates.js b/tests/baselines/reference/mergedInterfacesWithInheritedPrivates.js
index 527df77b0c6..ff5c2e5e910 100644
--- a/tests/baselines/reference/mergedInterfacesWithInheritedPrivates.js
+++ b/tests/baselines/reference/mergedInterfacesWithInheritedPrivates.js
@@ -43,4 +43,4 @@ var E = (function () {
     return E;
 })();
 var a;
-var r = a.x;
+var r = a.x;// error 
diff --git a/tests/baselines/reference/mergedInterfacesWithInheritedPrivates2.js b/tests/baselines/reference/mergedInterfacesWithInheritedPrivates2.js
index 98fa868bb53..75552123289 100644
--- a/tests/baselines/reference/mergedInterfacesWithInheritedPrivates2.js
+++ b/tests/baselines/reference/mergedInterfacesWithInheritedPrivates2.js
@@ -63,5 +63,5 @@ var E = (function (_super) {
     return E;
 })(C2);
 var a;
-var r = a.x;
-var r2 = a.w;
+var r = a.x;// error 
+var r2 = a.w;// error 
diff --git a/tests/baselines/reference/mergedModuleDeclarationCodeGen5.js b/tests/baselines/reference/mergedModuleDeclarationCodeGen5.js
index fab0f72dada..c5c05f034c0 100644
--- a/tests/baselines/reference/mergedModuleDeclarationCodeGen5.js
+++ b/tests/baselines/reference/mergedModuleDeclarationCodeGen5.js
@@ -52,12 +52,12 @@ var M;
             })(_plop.plop || (_plop.plop = {}));
             var plop = _plop.plop;
             // Emit these references as follows
-            var v1 = gunk;
-            var v2 = buz;
-            _plop.v3 = _plop.doom;
-            _plop.v4 = _plop.M;
-            _plop.v5 = fudge;
-            _plop.v6 = plop;
+            var v1 = gunk;// gunk 
+            var v2 = buz;// buz 
+            _plop.v3 = _plop.doom;// _plop.doom 
+            _plop.v4 = _plop.M;// _plop.M 
+            _plop.v5 = fudge;// fudge 
+            _plop.v6 = plop;// plop 
         })(_buz.plop || (_buz.plop = {}));
         var plop = _buz.plop;
     })(M.buz || (M.buz = {}));
diff --git a/tests/baselines/reference/mismatchedExplicitTypeParameterAndArgumentType.js b/tests/baselines/reference/mismatchedExplicitTypeParameterAndArgumentType.js
index 64c801b5af4..56e3bda70df 100644
--- a/tests/baselines/reference/mismatchedExplicitTypeParameterAndArgumentType.js
+++ b/tests/baselines/reference/mismatchedExplicitTypeParameterAndArgumentType.js
@@ -21,6 +21,6 @@ function map(xs, f) {
 var r0 = map([1, ""], function (x) { return x.toString(); });
 var r5 = map([1, ""], function (x) { return x.toString(); });
 var r6 = map([1, ""], function (x) { return x.toString(); });
-var r7 = map([1, ""], function (x) { return x.toString(); });
-var r7b = map([1, ""], function (x) { return x.toString(); });
+var r7 = map([1, ""], function (x) { return x.toString(); });// error 
+var r7b = map([1, ""], function (x) { return x.toString(); });// error 
 var r8 = map([1, ""], function (x) { return x.toString(); });
diff --git a/tests/baselines/reference/moduleAliasInterface.js b/tests/baselines/reference/moduleAliasInterface.js
index 194a195627d..02c08fe5495 100644
--- a/tests/baselines/reference/moduleAliasInterface.js
+++ b/tests/baselines/reference/moduleAliasInterface.js
@@ -72,7 +72,7 @@ var editor;
     // If you just use p1:modes, the compiler accepts it - should be an error
     var Bug = (function () {
         function Bug(p1, p2) {
-        }
+        }// should be an error on p2 - it's not exported 
         Bug.prototype.foo = function (p1) {
         };
         return Bug;
@@ -84,7 +84,7 @@ var editor2;
     var i;
     var Bug = (function () {
         function Bug(p1, p2) {
-        }
+        }// no error here, since modesOuter is declared externally 
         return Bug;
     })();
     var Foo;
diff --git a/tests/baselines/reference/moduleAndInterfaceWithSameName.js b/tests/baselines/reference/moduleAndInterfaceWithSameName.js
index c88292bbb18..17d65c27fef 100644
--- a/tests/baselines/reference/moduleAndInterfaceWithSameName.js
+++ b/tests/baselines/reference/moduleAndInterfaceWithSameName.js
@@ -46,7 +46,7 @@ var Foo2;
         Bar.x = 42;
     })(Bar || (Bar = {}));
 })(Foo2 || (Foo2 = {}));
-var z2 = Foo2.Bar.y;
+var z2 = Foo2.Bar.y;// Error for using interface name as a value. 
 var Foo3;
 (function (Foo3) {
     (function (Bar) {
diff --git a/tests/baselines/reference/moduleNewExportBug.js b/tests/baselines/reference/moduleNewExportBug.js
index 4fbc9e0ad25..0358d54703d 100644
--- a/tests/baselines/reference/moduleNewExportBug.js
+++ b/tests/baselines/reference/moduleNewExportBug.js
@@ -24,4 +24,4 @@ var mod1;
         return C;
     })();
 })(mod1 || (mod1 = {}));
-var c;
+var c;// ERROR: C should not be visible 
diff --git a/tests/baselines/reference/moduleProperty2.js b/tests/baselines/reference/moduleProperty2.js
index d8027d8d67b..5b7e3541e31 100644
--- a/tests/baselines/reference/moduleProperty2.js
+++ b/tests/baselines/reference/moduleProperty2.js
@@ -23,10 +23,10 @@ var M;
     var y;
     M.z;
     var test1 = x;
-    var test2 = y;
+    var test2 = y;// y visible because same module 
 })(M || (M = {}));
 var N;
 (function (N) {
-    var test3 = M.y;
-    var test4 = M.z;
+    var test3 = M.y;// nope y private property of M 
+    var test4 = M.z;// ok public property of M 
 })(N || (N = {}));
diff --git a/tests/baselines/reference/moduleScopingBug.js b/tests/baselines/reference/moduleScopingBug.js
index 45ac72055a4..af47d5643ab 100644
--- a/tests/baselines/reference/moduleScopingBug.js
+++ b/tests/baselines/reference/moduleScopingBug.js
@@ -34,16 +34,16 @@ var M;
 (function (M) {
     var outer;
     function f() {
-        var inner = outer;
+        var inner = outer;// Ok 
     }
     var C = (function () {
         function C() {
-            var inner = outer;
+            var inner = outer;// Ok 
         }
         return C;
     })();
     var X;
     (function (X) {
-        var inner = outer;
+        var inner = outer;// Error: outer not visible 
     })(X || (X = {}));
 })(M || (M = {}));
diff --git a/tests/baselines/reference/moduleUnassignedVariable.js b/tests/baselines/reference/moduleUnassignedVariable.js
index 8a6866c3877..01851ddee79 100644
--- a/tests/baselines/reference/moduleUnassignedVariable.js
+++ b/tests/baselines/reference/moduleUnassignedVariable.js
@@ -14,9 +14,9 @@ var Bar;
     Bar.a = 1;
     function fooA() {
         return Bar.a;
-    }
+    }// Correct: return Bar.a 
     Bar.b;
     function fooB() {
         return Bar.b;
-    }
+    }// Incorrect: return b 
 })(Bar || (Bar = {}));
diff --git a/tests/baselines/reference/moduleVariableArrayIndexer.js b/tests/baselines/reference/moduleVariableArrayIndexer.js
index 47a2ba5158f..ae8382be600 100644
--- a/tests/baselines/reference/moduleVariableArrayIndexer.js
+++ b/tests/baselines/reference/moduleVariableArrayIndexer.js
@@ -9,5 +9,5 @@ module Bar {
 var Bar;
 (function (Bar) {
     Bar.a = 1;
-    var t = undefined[Bar.a][Bar.a];
+    var t = undefined[Bar.a][Bar.a];// CG: var t = undefined[Bar.a][a]; 
 })(Bar || (Bar = {}));
diff --git a/tests/baselines/reference/moduleWithNoValuesAsType.js b/tests/baselines/reference/moduleWithNoValuesAsType.js
index eeeabf23c71..f2bea35062a 100644
--- a/tests/baselines/reference/moduleWithNoValuesAsType.js
+++ b/tests/baselines/reference/moduleWithNoValuesAsType.js
@@ -16,6 +16,6 @@ module C {
 var c: C; // error
 
 //// [moduleWithNoValuesAsType.js]
-var a;
-var b;
-var c;
+var a;// error 
+var b;// error 
+var c;// error 
diff --git a/tests/baselines/reference/moduleWithValuesAsType.js b/tests/baselines/reference/moduleWithValuesAsType.js
index ed1dc3d5487..87510d2c709 100644
--- a/tests/baselines/reference/moduleWithValuesAsType.js
+++ b/tests/baselines/reference/moduleWithValuesAsType.js
@@ -10,4 +10,4 @@ var A;
 (function (A) {
     var b = 1;
 })(A || (A = {}));
-var a;
+var a;// no error 
diff --git a/tests/baselines/reference/multiModuleFundule1.js b/tests/baselines/reference/multiModuleFundule1.js
index bf2abfb7dc8..e0dccac6370 100644
--- a/tests/baselines/reference/multiModuleFundule1.js
+++ b/tests/baselines/reference/multiModuleFundule1.js
@@ -26,5 +26,5 @@ var C;
     C.foo = foo;
 })(C || (C = {}));
 var r = C(2);
-var r2 = new C(2);
+var r2 = new C(2);// using void returning function as constructor 
 var r3 = C.foo();
diff --git a/tests/baselines/reference/nameCollisions.js b/tests/baselines/reference/nameCollisions.js
index 0591989adbb..e2ab9dedb98 100644
--- a/tests/baselines/reference/nameCollisions.js
+++ b/tests/baselines/reference/nameCollisions.js
@@ -64,7 +64,7 @@ var T;
     (function (z) {
         var t;
     })(z || (z = {}));
-    var z;
+    var z;// error 
     var y;
     (function (y) {
         var b;
@@ -73,14 +73,14 @@ var T;
         function y() {
         }
         return y;
-    })();
+    })();// error 
     var w;
     var f;
     function f() {
-    }
+    }//error 
     function f2() {
     }
-    var f2;
+    var f2;// error 
     var i;
     var C = (function () {
         function C() {
@@ -88,14 +88,14 @@ var T;
         return C;
     })();
     function C() {
-    }
+    }// error 
     function C2() {
     }
     var C2 = (function () {
         function C2() {
         }
         return C2;
-    })();
+    })();// error 
     function fi() {
     }
     var cli = (function () {
@@ -107,5 +107,5 @@ var T;
         function cli2() {
         }
         return cli2;
-    })();
+    })();// error 
 })(T || (T = {}));
diff --git a/tests/baselines/reference/namedFunctionExpressionAssignedToClassProperty.js b/tests/baselines/reference/namedFunctionExpressionAssignedToClassProperty.js
index ea97d23f8d6..35b4f624899 100644
--- a/tests/baselines/reference/namedFunctionExpressionAssignedToClassProperty.js
+++ b/tests/baselines/reference/namedFunctionExpressionAssignedToClassProperty.js
@@ -18,7 +18,7 @@ class Foo{
 var Foo = (function () {
     function Foo() {
         this.a = function bar() {
-        };
+        };// this shouldn't crash the compiler... 
     }
     return Foo;
 })();
diff --git a/tests/baselines/reference/nestedModulePrivateAccess.js b/tests/baselines/reference/nestedModulePrivateAccess.js
index fd6efb5e402..0694f1d3469 100644
--- a/tests/baselines/reference/nestedModulePrivateAccess.js
+++ b/tests/baselines/reference/nestedModulePrivateAccess.js
@@ -12,6 +12,6 @@ var a;
     var x;
     var b;
     (function (b) {
-        var y = x;
+        var y = x;// should not be an error 
     })(b || (b = {}));
 })(a || (a = {}));
diff --git a/tests/baselines/reference/nestedModules.js b/tests/baselines/reference/nestedModules.js
index 147e6d43b49..832d282f888 100644
--- a/tests/baselines/reference/nestedModules.js
+++ b/tests/baselines/reference/nestedModules.js
@@ -36,7 +36,7 @@ var p: M2.X.Point;
 var A;
 (function (A) {
     (function (B) {
-        var Point = { x: 0, y: 0 };
+        var Point = { x: 0, y: 0 };// bug 832088: could not find module 'C' 
     })(A.B || (A.B = {}));
     var B = A.B;
 })(A || (A = {}));
diff --git a/tests/baselines/reference/newExpressionWithTypeParameterConstrainedToOuterTypeParameter.js b/tests/baselines/reference/newExpressionWithTypeParameterConstrainedToOuterTypeParameter.js
index f1e7136eb12..9007ab77c3b 100644
--- a/tests/baselines/reference/newExpressionWithTypeParameterConstrainedToOuterTypeParameter.js
+++ b/tests/baselines/reference/newExpressionWithTypeParameterConstrainedToOuterTypeParameter.js
@@ -7,4 +7,4 @@ var y = new i(""); // y should be string
 
 //// [newExpressionWithTypeParameterConstrainedToOuterTypeParameter.js]
 var i;
-var y = new i("");
+var y = new i("");// y should be string 
diff --git a/tests/baselines/reference/newNonReferenceType.js b/tests/baselines/reference/newNonReferenceType.js
index 8647b2379a0..e4d4d0176aa 100644
--- a/tests/baselines/reference/newNonReferenceType.js
+++ b/tests/baselines/reference/newNonReferenceType.js
@@ -5,4 +5,4 @@ var b = new boolean(); // error
 
 //// [newNonReferenceType.js]
 var a = new any();
-var b = new boolean();
+var b = new boolean();// error 
diff --git a/tests/baselines/reference/newOnInstanceSymbol.js b/tests/baselines/reference/newOnInstanceSymbol.js
index 428841de21b..10344f21d19 100644
--- a/tests/baselines/reference/newOnInstanceSymbol.js
+++ b/tests/baselines/reference/newOnInstanceSymbol.js
@@ -9,5 +9,5 @@ var C = (function () {
     }
     return C;
 })();
-var x = new C();
+var x = new C();// should be ok 
 new x();
diff --git a/tests/baselines/reference/noErrorsInCallback.js b/tests/baselines/reference/noErrorsInCallback.js
index 7cae7858db7..acfcaa194dc 100644
--- a/tests/baselines/reference/noErrorsInCallback.js
+++ b/tests/baselines/reference/noErrorsInCallback.js
@@ -15,7 +15,7 @@ var Bar = (function () {
     }
     return Bar;
 })();
-var one = new Bar({});
+var one = new Bar({});// Error 
 [].forEach(function () {
-    var two = new Bar({});
+    var two = new Bar({});// No error? 
 });
diff --git a/tests/baselines/reference/noImplicitAnyForMethodParameters.js b/tests/baselines/reference/noImplicitAnyForMethodParameters.js
index 2ddc8b3f86e..b8d906da5a8 100644
--- a/tests/baselines/reference/noImplicitAnyForMethodParameters.js
+++ b/tests/baselines/reference/noImplicitAnyForMethodParameters.js
@@ -19,13 +19,13 @@ var C = (function () {
     function C() {
     }
     C.prototype.foo = function (a) {
-    };
+    };// OK - non-ambient class and private method - error 
     return C;
 })();
 var D = (function () {
     function D() {
     }
     D.prototype.foo = function (a) {
-    };
+    };// OK - non-ambient class and public method - error 
     return D;
 })();
diff --git a/tests/baselines/reference/nonGenericClassExtendingGenericClassWithAny.js b/tests/baselines/reference/nonGenericClassExtendingGenericClassWithAny.js
index a5254b5ffff..79cc1194b29 100644
--- a/tests/baselines/reference/nonGenericClassExtendingGenericClassWithAny.js
+++ b/tests/baselines/reference/nonGenericClassExtendingGenericClassWithAny.js
@@ -23,4 +23,4 @@ var Bar = (function (_super) {
         _super.apply(this, arguments);
     }
     return Bar;
-})(Foo);
+})(Foo);// Valid 
diff --git a/tests/baselines/reference/nullAssignedToUndefined.js b/tests/baselines/reference/nullAssignedToUndefined.js
index b91acd88c00..284fdcfb3d8 100644
--- a/tests/baselines/reference/nullAssignedToUndefined.js
+++ b/tests/baselines/reference/nullAssignedToUndefined.js
@@ -3,5 +3,5 @@ var x = undefined = null; // error
 var y: typeof undefined = null; // ok, widened
 
 //// [nullAssignedToUndefined.js]
-var x = undefined = null;
-var y = null;
+var x = undefined = null;// error 
+var y = null;// ok, widened 
diff --git a/tests/baselines/reference/nullIsSubtypeOfEverythingButUndefined.js b/tests/baselines/reference/nullIsSubtypeOfEverythingButUndefined.js
index ae86031ca0c..4d9b45402d4 100644
--- a/tests/baselines/reference/nullIsSubtypeOfEverythingButUndefined.js
+++ b/tests/baselines/reference/nullIsSubtypeOfEverythingButUndefined.js
@@ -119,7 +119,7 @@ var r8 = true ? function (x) {
 } : null;
 var r8b = true ? null : function (x) {
     return x;
-};
+};// type parameters not identical across declarations 
 var i1;
 var r9 = true ? i1 : null;
 var r9 = true ? null : i1;
diff --git a/tests/baselines/reference/numericIndexerConstraint1.js b/tests/baselines/reference/numericIndexerConstraint1.js
index e587ed6753c..06a8082fc32 100644
--- a/tests/baselines/reference/numericIndexerConstraint1.js
+++ b/tests/baselines/reference/numericIndexerConstraint1.js
@@ -13,4 +13,4 @@ var Foo = (function () {
     return Foo;
 })();
 var x;
-var result = x["one"];
+var result = x["one"];// error 
diff --git a/tests/baselines/reference/numericIndexerTyping1.js b/tests/baselines/reference/numericIndexerTyping1.js
index 7e4a1f07de5..5fd69a1f894 100644
--- a/tests/baselines/reference/numericIndexerTyping1.js
+++ b/tests/baselines/reference/numericIndexerTyping1.js
@@ -14,6 +14,6 @@ var r2: string = i2[1]; // error: numeric indexer returns the type of the string
 
 //// [numericIndexerTyping1.js]
 var i;
-var r = i[1];
+var r = i[1];// error: numeric indexer returns the type of the string indexer 
 var i2;
-var r2 = i2[1];
+var r2 = i2[1];// error: numeric indexer returns the type of the string indexer 
diff --git a/tests/baselines/reference/numericIndexerTyping2.js b/tests/baselines/reference/numericIndexerTyping2.js
index 6e6a9396be1..971e5c4417f 100644
--- a/tests/baselines/reference/numericIndexerTyping2.js
+++ b/tests/baselines/reference/numericIndexerTyping2.js
@@ -32,6 +32,6 @@ var I2 = (function (_super) {
     return I2;
 })(I);
 var i;
-var r = i[1];
+var r = i[1];// error: numeric indexer returns the type of the string indexer 
 var i2;
-var r2 = i2[1];
+var r2 = i2[1];// error: numeric indexer returns the type of the string indexere 
diff --git a/tests/baselines/reference/objectLiteralArraySpecialization.js b/tests/baselines/reference/objectLiteralArraySpecialization.js
index dc8ab70a1ab..8d049e43a56 100644
--- a/tests/baselines/reference/objectLiteralArraySpecialization.js
+++ b/tests/baselines/reference/objectLiteralArraySpecialization.js
@@ -9,5 +9,5 @@ thing.doSomething((x, y) => x.name === "bob"); // should not error
 
 
 //// [objectLiteralArraySpecialization.js]
-var thing = create([{ name: "bob", id: 24 }, { name: "doug", id: 32 }]);
+var thing = create([{ name: "bob", id: 24 }, { name: "doug", id: 32 }]);// should not error 
 thing.doSomething(function (x, y) { return x.name === "bob"; });
diff --git a/tests/baselines/reference/objectLiteralIndexerErrors.js b/tests/baselines/reference/objectLiteralIndexerErrors.js
index a0f57f23382..d7e23c846a1 100644
--- a/tests/baselines/reference/objectLiteralIndexerErrors.js
+++ b/tests/baselines/reference/objectLiteralIndexerErrors.js
@@ -18,5 +18,5 @@ o1 = { x: c, 0: a }; // string indexer is any, number indexer is A
 var a;
 var b;
 var c;
-var o1 = { x: b, 0: a };
+var o1 = { x: b, 0: a };// both indexers are A 
 o1 = { x: c, 0: a };
diff --git a/tests/baselines/reference/objectLiteralIndexers.js b/tests/baselines/reference/objectLiteralIndexers.js
index f2d9ea63430..71ab0f742df 100644
--- a/tests/baselines/reference/objectLiteralIndexers.js
+++ b/tests/baselines/reference/objectLiteralIndexers.js
@@ -19,6 +19,6 @@ o1 = { x: c, 0: b }; // string indexer is any, number indexer is B
 var a;
 var b;
 var c;
-var o1 = { x: a, 0: b };
+var o1 = { x: a, 0: b };// string indexer is A, number indexer is B 
 o1 = { x: b, 0: c };
 o1 = { x: c, 0: b };
diff --git a/tests/baselines/reference/objectLiteralReferencingInternalProperties.js b/tests/baselines/reference/objectLiteralReferencingInternalProperties.js
index 9612144dbef..e06c0055492 100644
--- a/tests/baselines/reference/objectLiteralReferencingInternalProperties.js
+++ b/tests/baselines/reference/objectLiteralReferencingInternalProperties.js
@@ -2,4 +2,4 @@
 var a = { b: 10, c: b }; // Should give error for attempting to reference b.
 
 //// [objectLiteralReferencingInternalProperties.js]
-var a = { b: 10, c: b };
+var a = { b: 10, c: b };// Should give error for attempting to reference b. 
diff --git a/tests/baselines/reference/objectTypeHidingMembersOfExtendedObject.js b/tests/baselines/reference/objectTypeHidingMembersOfExtendedObject.js
index daa19478e69..de7375129e8 100644
--- a/tests/baselines/reference/objectTypeHidingMembersOfExtendedObject.js
+++ b/tests/baselines/reference/objectTypeHidingMembersOfExtendedObject.js
@@ -83,13 +83,13 @@ var C = (function () {
 var c;
 var r1 = c.valueOf();
 var r1b = c.data;
-var r1c = r1b['hm'];
-var r1d = c['hm'];
+var r1c = r1b['hm'];// should be 'Object' 
+var r1d = c['hm'];// should be 'any' 
 var i;
 var r2 = i.valueOf();
 var r2b = i.data;
-var r2c = r2b['hm'];
-var r2d = i['hm'];
+var r2c = r2b['hm'];// should be 'Object' 
+var r2d = i['hm'];// should be 'any' 
 var a = {
     valueOf: function () {
     },
@@ -97,7 +97,7 @@ var a = {
 };
 var r3 = a.valueOf();
 var r3b = a.data;
-var r3c = r3b['hm'];
+var r3c = r3b['hm'];// should be 'Object' 
 var r3d = i['hm'];
 var b;
 var r4 = b.valueOf();
diff --git a/tests/baselines/reference/objectTypeWithCallSignatureHidingMembersOfExtendedFunction.js b/tests/baselines/reference/objectTypeWithCallSignatureHidingMembersOfExtendedFunction.js
index 6ab63424329..6fddcf21048 100644
--- a/tests/baselines/reference/objectTypeWithCallSignatureHidingMembersOfExtendedFunction.js
+++ b/tests/baselines/reference/objectTypeWithCallSignatureHidingMembersOfExtendedFunction.js
@@ -38,10 +38,10 @@ var r1 = i.apply;
 var r1b = i.call;
 var r1c = i.arguments;
 var r1d = i.data;
-var r1e = i['hm'];
+var r1e = i['hm'];// should be Object 
 var x;
 var r2 = x.apply;
 var r2b = x.call;
 var r2c = x.arguments;
 var r2d = x.data;
-var r2e = x['hm'];
+var r2e = x['hm'];// should be Object 
diff --git a/tests/baselines/reference/objectTypeWithConstructSignatureHidingMembersOfExtendedFunction.js b/tests/baselines/reference/objectTypeWithConstructSignatureHidingMembersOfExtendedFunction.js
index 33d9f067656..01a32274015 100644
--- a/tests/baselines/reference/objectTypeWithConstructSignatureHidingMembersOfExtendedFunction.js
+++ b/tests/baselines/reference/objectTypeWithConstructSignatureHidingMembersOfExtendedFunction.js
@@ -35,10 +35,10 @@ var r1 = i.apply;
 var r1b = i.call;
 var r1c = i.arguments;
 var r1d = i.data;
-var r1e = i['hm'];
+var r1e = i['hm'];// should be Object 
 var x;
 var r2 = x.apply;
 var r2b = x.call;
 var r2c = x.arguments;
 var r2d = x.data;
-var r2e = x['hm'];
+var r2e = x['hm'];// should be Object 
diff --git a/tests/baselines/reference/objectTypeWithStringIndexerHidingObjectIndexer.js b/tests/baselines/reference/objectTypeWithStringIndexerHidingObjectIndexer.js
index 59537954ab7..350b3c055d9 100644
--- a/tests/baselines/reference/objectTypeWithStringIndexerHidingObjectIndexer.js
+++ b/tests/baselines/reference/objectTypeWithStringIndexerHidingObjectIndexer.js
@@ -33,7 +33,7 @@ var r4: string = o2[''];
 
 //// [objectTypeWithStringIndexerHidingObjectIndexer.js]
 var o = {};
-var r = o[''];
+var r = o[''];// should be Object 
 var C = (function () {
     function C() {
     }
diff --git a/tests/baselines/reference/objectTypeWithStringNamedNumericProperty.js b/tests/baselines/reference/objectTypeWithStringNamedNumericProperty.js
index 2d290334276..287d1297252 100644
--- a/tests/baselines/reference/objectTypeWithStringNamedNumericProperty.js
+++ b/tests/baselines/reference/objectTypeWithStringNamedNumericProperty.js
@@ -142,10 +142,10 @@ var r2 = c['.1'];
 var r3 = c['1'];
 var r3 = c[1];
 var r4 = c['1.'];
-var r3 = c[1.];
+var r3 = c[1.];// same as indexing by 1 when done numerically 
 var r5 = c['1..'];
 var r6 = c['1.0'];
-var r3 = c[1.0];
+var r3 = c[1.0];// same as indexing by 1 when done numerically 
 // BUG 823822
 var r7 = i[-1];
 var r7 = i[-1.0];
@@ -161,10 +161,10 @@ var r2 = i['.1'];
 var r3 = i['1'];
 var r3 = c[1];
 var r4 = i['1.'];
-var r3 = c[1.];
+var r3 = c[1.];// same as indexing by 1 when done numerically 
 var r5 = i['1..'];
 var r6 = i['1.0'];
-var r3 = c[1.0];
+var r3 = c[1.0];// same as indexing by 1 when done numerically 
 // BUG 823822
 var r7 = i[-1];
 var r7 = i[-1.0];
@@ -180,10 +180,10 @@ var r2 = a['.1'];
 var r3 = a['1'];
 var r3 = c[1];
 var r4 = a['1.'];
-var r3 = c[1.];
+var r3 = c[1.];// same as indexing by 1 when done numerically 
 var r5 = a['1..'];
 var r6 = a['1.0'];
-var r3 = c[1.0];
+var r3 = c[1.0];// same as indexing by 1 when done numerically 
 // BUG 823822
 var r7 = i[-1];
 var r7 = i[-1.0];
@@ -208,10 +208,10 @@ var r2 = b['.1'];
 var r3 = b['1'];
 var r3 = c[1];
 var r4 = b['1.'];
-var r3 = c[1.];
+var r3 = c[1.];// same as indexing by 1 when done numerically 
 var r5 = b['1..'];
 var r6 = b['1.0'];
-var r3 = c[1.0];
+var r3 = c[1.0];// same as indexing by 1 when done numerically 
 // BUG 823822
 var r7 = i[-1];
 var r7 = i[-1.0];
diff --git a/tests/baselines/reference/objectTypesIdentityWithConstructSignatures2.js b/tests/baselines/reference/objectTypesIdentityWithConstructSignatures2.js
index 38d5491d080..25e3e33da8f 100644
--- a/tests/baselines/reference/objectTypesIdentityWithConstructSignatures2.js
+++ b/tests/baselines/reference/objectTypesIdentityWithConstructSignatures2.js
@@ -93,7 +93,7 @@ var C = (function () {
 var a;
 var b = { new: function (x) {
     return '';
-} };
+} };// not a construct signature, function called new 
 function foo1b(x) {
 }
 function foo1c(x) {
diff --git a/tests/baselines/reference/objectTypesIdentityWithConstructSignaturesDifferingParamCounts.js b/tests/baselines/reference/objectTypesIdentityWithConstructSignaturesDifferingParamCounts.js
index dcb2b66882c..968499ecbac 100644
--- a/tests/baselines/reference/objectTypesIdentityWithConstructSignaturesDifferingParamCounts.js
+++ b/tests/baselines/reference/objectTypesIdentityWithConstructSignaturesDifferingParamCounts.js
@@ -93,7 +93,7 @@ var C = (function () {
 var a;
 var b = { new: function (x) {
     return '';
-} };
+} };// not a construct signature, function called new 
 function foo1b(x) {
 }
 function foo1c(x) {
diff --git a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByConstraints.js b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByConstraints.js
index ca2efb3ffb1..a3687db5a96 100644
--- a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByConstraints.js
+++ b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByConstraints.js
@@ -94,7 +94,7 @@ var C = (function () {
 var a;
 var b = { new: function (x) {
     return '';
-} };
+} };// not a construct signature, function called new 
 function foo1b(x) {
 }
 function foo1c(x) {
diff --git a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByConstraints2.js b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByConstraints2.js
index c3bc58b8654..cb0986b872f 100644
--- a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByConstraints2.js
+++ b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByConstraints2.js
@@ -111,7 +111,7 @@ var D = (function () {
 var a;
 var b = { new: function (x, y) {
     return '';
-} };
+} };// not a construct signature, function called new 
 function foo1b(x) {
 }
 function foo1c(x) {
diff --git a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByConstraints3.js b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByConstraints3.js
index 292e65eb27d..619fcb8ed26 100644
--- a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByConstraints3.js
+++ b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByConstraints3.js
@@ -130,7 +130,7 @@ var D = (function () {
 var a;
 var b = { new: function (x, y) {
     return '';
-} };
+} };// not a construct signature, function called new 
 function foo1b(x) {
 }
 function foo1c(x) {
diff --git a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByReturnType.js b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByReturnType.js
index bc8d77388ff..985d97bdd87 100644
--- a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByReturnType.js
+++ b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByReturnType.js
@@ -101,7 +101,7 @@ var C = (function () {
 var a;
 var b = { new: function (x) {
     return null;
-} };
+} };// not a construct signature, function called new 
 function foo1b(x) {
 }
 function foo1c(x) {
diff --git a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByReturnType2.js b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByReturnType2.js
index 37d49a3be4b..6a29dbaced0 100644
--- a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByReturnType2.js
+++ b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByReturnType2.js
@@ -97,7 +97,7 @@ var C = (function () {
 var a;
 var b = { new: function (x) {
     return null;
-} };
+} };// not a construct signature, function called new 
 function foo1b(x) {
 }
 function foo1c(x) {
diff --git a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesOptionalParams.js b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesOptionalParams.js
index 828f548d67c..2f80babc8d6 100644
--- a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesOptionalParams.js
+++ b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesOptionalParams.js
@@ -93,7 +93,7 @@ var C = (function () {
 var a;
 var b = { new: function (x, y) {
     return new C(x, y);
-} };
+} };// not a construct signature, function called new 
 function foo1b(x) {
 }
 function foo1c(x) {
diff --git a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesOptionalParams2.js b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesOptionalParams2.js
index fbc020912db..94f459255f0 100644
--- a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesOptionalParams2.js
+++ b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesOptionalParams2.js
@@ -93,7 +93,7 @@ var C = (function () {
 var a;
 var b = { new: function (x, y) {
     return new C(x, y);
-} };
+} };// not a construct signature, function called new 
 function foo1b(x) {
 }
 function foo1c(x) {
diff --git a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesOptionalParams3.js b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesOptionalParams3.js
index 0bb887d1c6c..6c509101af6 100644
--- a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesOptionalParams3.js
+++ b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesOptionalParams3.js
@@ -93,7 +93,7 @@ var C = (function () {
 var a;
 var b = { new: function (x, y) {
     return new C(x, y);
-} };
+} };// not a construct signature, function called new 
 function foo1b(x) {
 }
 function foo1c(x) {
diff --git a/tests/baselines/reference/objectTypesWithPredefinedTypesAsName.js b/tests/baselines/reference/objectTypesWithPredefinedTypesAsName.js
index 6beb3471026..00205a33488 100644
--- a/tests/baselines/reference/objectTypesWithPredefinedTypesAsName.js
+++ b/tests/baselines/reference/objectTypesWithPredefinedTypesAsName.js
@@ -34,7 +34,7 @@ var bool = (function () {
     function bool() {
     }
     return bool;
-})();
+})();// not a predefined type anymore 
 var string = (function () {
     function string() {
     }
diff --git a/tests/baselines/reference/optionalConstructorArgInSuper.js b/tests/baselines/reference/optionalConstructorArgInSuper.js
index 1e88fd81299..c83db86fde1 100644
--- a/tests/baselines/reference/optionalConstructorArgInSuper.js
+++ b/tests/baselines/reference/optionalConstructorArgInSuper.js
@@ -31,6 +31,6 @@ var Derived = (function (_super) {
     }
     return Derived;
 })(Base);
-var d = new Derived();
+var d = new Derived();// bug caused an error here, couldn't select overload 
 var d2;
 d2.foo();
diff --git a/tests/baselines/reference/optionalParamAssignmentCompat.js b/tests/baselines/reference/optionalParamAssignmentCompat.js
index a2b52677869..b4d7c238ca5 100644
--- a/tests/baselines/reference/optionalParamAssignmentCompat.js
+++ b/tests/baselines/reference/optionalParamAssignmentCompat.js
@@ -13,5 +13,5 @@ var d: I1 = i2.m1; // should error
 
 //// [optionalParamAssignmentCompat.js]
 var i2;
-var c = i2.p1;
-var d = i2.m1;
+var c = i2.p1;// should be ok 
+var d = i2.m1;// should error 
diff --git a/tests/baselines/reference/overEagerReturnTypeSpecialization.js b/tests/baselines/reference/overEagerReturnTypeSpecialization.js
index 4d921fb6b81..fbc199c6b45 100644
--- a/tests/baselines/reference/overEagerReturnTypeSpecialization.js
+++ b/tests/baselines/reference/overEagerReturnTypeSpecialization.js
@@ -15,5 +15,5 @@ var r2: I1<number> = v1.func(num => num.toString()) // Correctly returns an I1<s
  
 
 //// [overEagerReturnTypeSpecialization.js]
-var r1 = v1.func(function (num) { return num.toString(); }).func(function (str) { return str.length; });
-var r2 = v1.func(function (num) { return num.toString(); }).func(function (str) { return str.length; });
+var r1 = v1.func(function (num) { return num.toString(); }).func(function (str) { return str.length; });// should error 
+var r2 = v1.func(function (num) { return num.toString(); }).func(function (str) { return str.length; });// should be ok  
diff --git a/tests/baselines/reference/overload1.js b/tests/baselines/reference/overload1.js
index e6bfc058db7..018a3400ff9 100644
--- a/tests/baselines/reference/overload1.js
+++ b/tests/baselines/reference/overload1.js
@@ -71,10 +71,10 @@ var O;
     })(B);
     O.C = C;
 })(O || (O = {}));
-var e = x.g(new O.A());
-var y = x.f(3);
+var e = x.g(new O.A());// matches overload but bad assignment 
+var y = x.f(3);// good 
 y = x.f("nope");
-var z = x.g(x.g(3, 3));
+var z = x.g(x.g(3, 3));// good 
 z = x.g(2, 2, 2);
 z = x.g();
 z = x.g(new O.B());
diff --git a/tests/baselines/reference/overloadModifiersMustAgree.js b/tests/baselines/reference/overloadModifiersMustAgree.js
index 141b5727383..9b8818640f9 100644
--- a/tests/baselines/reference/overloadModifiersMustAgree.js
+++ b/tests/baselines/reference/overloadModifiersMustAgree.js
@@ -20,7 +20,7 @@ var baz = (function () {
     function baz() {
     }
     baz.prototype.foo = function (bar) {
-    };
+    };// error - access modifiers do not agree 
     return baz;
 })();
 function bar(s) {
diff --git a/tests/baselines/reference/overloadOnConstInObjectLiteralImplementingAnInterface.js b/tests/baselines/reference/overloadOnConstInObjectLiteralImplementingAnInterface.js
index 25672c0f8ef..e819437ea1a 100644
--- a/tests/baselines/reference/overloadOnConstInObjectLiteralImplementingAnInterface.js
+++ b/tests/baselines/reference/overloadOnConstInObjectLiteralImplementingAnInterface.js
@@ -7,4 +7,4 @@ var i2: I = { x1: (a: number, cb: (x: 'hi') => number) => { } }; // error
 
 //// [overloadOnConstInObjectLiteralImplementingAnInterface.js]
 var i2 = { x1: function (a, cb) {
-} };
+} };// error 
diff --git a/tests/baselines/reference/overloadOnGenericClassAndNonGenericClass.js b/tests/baselines/reference/overloadOnGenericClassAndNonGenericClass.js
index bb082ac97fc..4664ccefee8 100644
--- a/tests/baselines/reference/overloadOnGenericClassAndNonGenericClass.js
+++ b/tests/baselines/reference/overloadOnGenericClassAndNonGenericClass.js
@@ -51,4 +51,4 @@ function f(a) {
 }
 var xs;
 var t3 = f(xs);
-var t3;
+var t3;// should not error 
diff --git a/tests/baselines/reference/overloadResolutionTest1.js b/tests/baselines/reference/overloadResolutionTest1.js
index b24723d8210..021b2e9fee5 100644
--- a/tests/baselines/reference/overloadResolutionTest1.js
+++ b/tests/baselines/reference/overloadResolutionTest1.js
@@ -30,19 +30,19 @@ function foo(bar) {
     return bar;
 }
 ;
-var x1 = foo([{ a: true }]);
-var x11 = foo([{ a: 0 }]);
-var x111 = foo([{ a: "s" }]);
-var x1111 = foo([{ a: null }]);
+var x1 = foo([{ a: true }]);// works 
+var x11 = foo([{ a: 0 }]);// works 
+var x111 = foo([{ a: "s" }]);// error - does not match any signature 
+var x1111 = foo([{ a: null }]);// works - ambiguous call is resolved to be the first in the overload set so this returns a string 
 function foo2(bar) {
     return bar;
 }
 ;
-var x2 = foo2({ a: 0 });
-var x3 = foo2({ a: true });
-var x4 = foo2({ a: "s" });
+var x2 = foo2({ a: 0 });// works 
+var x3 = foo2({ a: true });// works 
+var x4 = foo2({ a: "s" });// error 
 function foo4(bar) {
     return bar;
 }
 ;
-var x = foo4({ a: true });
+var x = foo4({ a: true });// error 
diff --git a/tests/baselines/reference/overloadingOnConstants2.js b/tests/baselines/reference/overloadingOnConstants2.js
index 34094804f6a..990dbad5b7a 100644
--- a/tests/baselines/reference/overloadingOnConstants2.js
+++ b/tests/baselines/reference/overloadingOnConstants2.js
@@ -56,12 +56,12 @@ var E = (function () {
 function foo(x, items) {
     return null;
 }
-var a = foo("hi", []);
-var b = foo("bye", []);
-var c = foo("um", []);
+var a = foo("hi", []);// D 
+var b = foo("bye", []);// E  
+var c = foo("um", []);// error 
 function bar(x, items) {
     return null;
 }
-var d = bar("hi", []);
-var e = bar("bye", []);
-var f = bar("um", []);
+var d = bar("hi", []);// D 
+var e = bar("bye", []);// E  
+var f = bar("um", []);// C 
diff --git a/tests/baselines/reference/overloadresolutionWithConstraintCheckingDeferred.js b/tests/baselines/reference/overloadresolutionWithConstraintCheckingDeferred.js
index b56693c97cd..2e34fca5ba8 100644
--- a/tests/baselines/reference/overloadresolutionWithConstraintCheckingDeferred.js
+++ b/tests/baselines/reference/overloadresolutionWithConstraintCheckingDeferred.js
@@ -28,9 +28,9 @@ var G = (function () {
     }
     return G;
 })();
-var result = foo(function (x) { return new G(x); });
-var result2 = foo(function (x) { return new G(x); });
+var result = foo(function (x) { return new G(x); });// No error, returns number 
+var result2 = foo(function (x) { return new G(x); });// No error, returns number 
 var result3 = foo(function (x) {
-    var y;
+    var y;// error that C does not satisfy constraint 
     return y;
 });
diff --git a/tests/baselines/reference/overloadsWithinClasses.js b/tests/baselines/reference/overloadsWithinClasses.js
index 8ef9341ec15..80806c6ca7a 100644
--- a/tests/baselines/reference/overloadsWithinClasses.js
+++ b/tests/baselines/reference/overloadsWithinClasses.js
@@ -30,14 +30,14 @@ var foo = (function () {
     foo.fnOverload = function () {
     };
     foo.fnOverload = function (foo) {
-    };
+    };// error 
     return foo;
 })();
 var bar = (function () {
     function bar() {
     }
     bar.fnOverload = function (foo) {
-    };
+    };// no error 
     return bar;
 })();
 var X = (function () {
diff --git a/tests/baselines/reference/paramPropertiesInSignatures.js b/tests/baselines/reference/paramPropertiesInSignatures.js
index 03e73d143ae..8b0de90fd3d 100644
--- a/tests/baselines/reference/paramPropertiesInSignatures.js
+++ b/tests/baselines/reference/paramPropertiesInSignatures.js
@@ -15,6 +15,6 @@ declare class C2 {
 var C1 = (function () {
     function C1(p3) {
         this.p3 = p3;
-    }
+    }// OK 
     return C1;
 })();
diff --git a/tests/baselines/reference/parserParameterList7.js b/tests/baselines/reference/parserParameterList7.js
index f2ab0291817..bf048a0e3e3 100644
--- a/tests/baselines/reference/parserParameterList7.js
+++ b/tests/baselines/reference/parserParameterList7.js
@@ -9,6 +9,6 @@ class C1 {
 var C1 = (function () {
     function C1(p3) {
         this.p3 = p3;
-    }
+    }// OK 
     return C1;
 })();
diff --git a/tests/baselines/reference/partiallyAmbientClodule.js b/tests/baselines/reference/partiallyAmbientClodule.js
index d7182e73e09..1a09bbf3484 100644
--- a/tests/baselines/reference/partiallyAmbientClodule.js
+++ b/tests/baselines/reference/partiallyAmbientClodule.js
@@ -9,4 +9,4 @@ var foo = (function () {
     function foo() {
     }
     return foo;
-})();
+})();// Legal, because module is ambient 
diff --git a/tests/baselines/reference/partiallyAmbientFundule.js b/tests/baselines/reference/partiallyAmbientFundule.js
index e4712fbe730..6afdd00419e 100644
--- a/tests/baselines/reference/partiallyAmbientFundule.js
+++ b/tests/baselines/reference/partiallyAmbientFundule.js
@@ -6,4 +6,4 @@ function foo () { } // Legal, because module is ambient
 
 //// [partiallyAmbientFundule.js]
 function foo() {
-}
+}// Legal, because module is ambient 
diff --git a/tests/baselines/reference/primaryExpressionMods.js b/tests/baselines/reference/primaryExpressionMods.js
index ced35861a2b..36797637f2b 100644
--- a/tests/baselines/reference/primaryExpressionMods.js
+++ b/tests/baselines/reference/primaryExpressionMods.js
@@ -17,9 +17,9 @@ var M;
 (function (M) {
     M.a = 1;
 })(M || (M = {}));
-var p;
-var m = M;
-var m2 = M;
-var x1 = M.a;
-var x2 = m.a;
-var q;
+var p;// Used as ModuleName 
+var m = M;// Used as TypeName and PrimaryExpression (error on TypeName) 
+var m2 = M;// Used as PrimaryExpression in TypeQuery 
+var x1 = M.a;// Used as PrimaryExpression 
+var x2 = m.a;// Same as M.a 
+var q;// Error 
diff --git a/tests/baselines/reference/privacyCannotNameVarTypeDeclFile.js b/tests/baselines/reference/privacyCannotNameVarTypeDeclFile.js
index 3a95daf0ede..7ddc6b36a14 100644
--- a/tests/baselines/reference/privacyCannotNameVarTypeDeclFile.js
+++ b/tests/baselines/reference/privacyCannotNameVarTypeDeclFile.js
@@ -151,14 +151,14 @@ exports.createExportedWidget4 = createExportedWidget4;
 var exporter = require("privacyCannotNameVarTypeDeclFile_exporter");
 var publicClassWithWithPrivatePropertyTypes = (function () {
     function publicClassWithWithPrivatePropertyTypes() {
-        this.myPublicProperty = exporter.createExportedWidget1();
+        this.myPublicProperty = exporter.createExportedWidget1();// Error 
         this.myPrivateProperty = exporter.createExportedWidget1();
-        this.myPublicProperty1 = exporter.createExportedWidget3();
+        this.myPublicProperty1 = exporter.createExportedWidget3();// Error 
         this.myPrivateProperty1 = exporter.createExportedWidget3();
     }
-    publicClassWithWithPrivatePropertyTypes.myPublicStaticProperty = exporter.createExportedWidget1();
+    publicClassWithWithPrivatePropertyTypes.myPublicStaticProperty = exporter.createExportedWidget1();// Error 
     publicClassWithWithPrivatePropertyTypes.myPrivateStaticProperty = exporter.createExportedWidget1();
-    publicClassWithWithPrivatePropertyTypes.myPublicStaticProperty1 = exporter.createExportedWidget3();
+    publicClassWithWithPrivatePropertyTypes.myPublicStaticProperty1 = exporter.createExportedWidget3();// Error 
     publicClassWithWithPrivatePropertyTypes.myPrivateStaticProperty1 = exporter.createExportedWidget3();
     return publicClassWithWithPrivatePropertyTypes;
 })();
@@ -176,22 +176,22 @@ var privateClassWithWithPrivatePropertyTypes = (function () {
     privateClassWithWithPrivatePropertyTypes.myPrivateStaticProperty1 = exporter.createExportedWidget3();
     return privateClassWithWithPrivatePropertyTypes;
 })();
-exports.publicVarWithPrivatePropertyTypes = exporter.createExportedWidget1();
+exports.publicVarWithPrivatePropertyTypes = exporter.createExportedWidget1();// Error 
 var privateVarWithPrivatePropertyTypes = exporter.createExportedWidget1();
-exports.publicVarWithPrivatePropertyTypes1 = exporter.createExportedWidget3();
+exports.publicVarWithPrivatePropertyTypes1 = exporter.createExportedWidget3();// Error 
 var privateVarWithPrivatePropertyTypes1 = exporter.createExportedWidget3();
 var publicClassWithPrivateModulePropertyTypes = (function () {
     function publicClassWithPrivateModulePropertyTypes() {
-        this.myPublicProperty = exporter.createExportedWidget2();
-        this.myPublicProperty1 = exporter.createExportedWidget4();
+        this.myPublicProperty = exporter.createExportedWidget2();// Error 
+        this.myPublicProperty1 = exporter.createExportedWidget4();// Error 
     }
-    publicClassWithPrivateModulePropertyTypes.myPublicStaticProperty = exporter.createExportedWidget2();
-    publicClassWithPrivateModulePropertyTypes.myPublicStaticProperty1 = exporter.createExportedWidget4();
+    publicClassWithPrivateModulePropertyTypes.myPublicStaticProperty = exporter.createExportedWidget2();// Error 
+    publicClassWithPrivateModulePropertyTypes.myPublicStaticProperty1 = exporter.createExportedWidget4();// Error 
     return publicClassWithPrivateModulePropertyTypes;
 })();
 exports.publicClassWithPrivateModulePropertyTypes = publicClassWithPrivateModulePropertyTypes;
-exports.publicVarWithPrivateModulePropertyTypes = exporter.createExportedWidget2();
-exports.publicVarWithPrivateModulePropertyTypes1 = exporter.createExportedWidget4();
+exports.publicVarWithPrivateModulePropertyTypes = exporter.createExportedWidget2();// Error 
+exports.publicVarWithPrivateModulePropertyTypes1 = exporter.createExportedWidget4();// Error 
 var privateClassWithPrivateModulePropertyTypes = (function () {
     function privateClassWithPrivateModulePropertyTypes() {
         this.myPublicProperty = exporter.createExportedWidget2();
diff --git a/tests/baselines/reference/privacyCheckAnonymousFunctionParameter.js b/tests/baselines/reference/privacyCheckAnonymousFunctionParameter.js
index f2f2ac9ae12..75c4cd79e7d 100644
--- a/tests/baselines/reference/privacyCheckAnonymousFunctionParameter.js
+++ b/tests/baselines/reference/privacyCheckAnonymousFunctionParameter.js
@@ -17,7 +17,7 @@ module Query {
 
 
 //// [privacyCheckAnonymousFunctionParameter.js]
-exports.x = 1;
+exports.x = 1;// Makes this an external module 
 var Query;
 (function (Query) {
     function fromDoWhile(doWhile) {
diff --git a/tests/baselines/reference/privacyCheckAnonymousFunctionParameter2.js b/tests/baselines/reference/privacyCheckAnonymousFunctionParameter2.js
index a1897ac05a3..3492026895e 100644
--- a/tests/baselines/reference/privacyCheckAnonymousFunctionParameter2.js
+++ b/tests/baselines/reference/privacyCheckAnonymousFunctionParameter2.js
@@ -16,7 +16,7 @@ module Q {
 
 //// [privacyCheckAnonymousFunctionParameter2.js]
 define(["require", "exports"], function (require, exports) {
-    exports.x = 1;
+    exports.x = 1;// Makes this an external module  
     var Q;
     (function (Q) {
         function foo(x) {
diff --git a/tests/baselines/reference/privacyCheckTypeOfInvisibleModuleNoError.js b/tests/baselines/reference/privacyCheckTypeOfInvisibleModuleNoError.js
index 4bf2ff55471..34764208f13 100644
--- a/tests/baselines/reference/privacyCheckTypeOfInvisibleModuleNoError.js
+++ b/tests/baselines/reference/privacyCheckTypeOfInvisibleModuleNoError.js
@@ -15,5 +15,5 @@ var Outer;
     (function (Inner) {
         Inner.m;
     })(Inner || (Inner = {}));
-    Outer.f;
+    Outer.f;// Since we dont unwind inner any more, it is error here 
 })(Outer || (Outer = {}));
diff --git a/tests/baselines/reference/privacyGloVar.js b/tests/baselines/reference/privacyGloVar.js
index f0a26119798..9f21e35947e 100644
--- a/tests/baselines/reference/privacyGloVar.js
+++ b/tests/baselines/reference/privacyGloVar.js
@@ -101,11 +101,11 @@ var m1;
             this.C3_v11_private = new C1_public();
             this.C3_v12_public = new C1_public();
             this.C3_v13_private = new C2_private();
-            this.C3_v14_public = new C2_private();
+            this.C3_v14_public = new C2_private();// error 
             this.C3_v21_private = new C1_public();
             this.C3_v22_public = new C1_public();
             this.C3_v23_private = new C2_private();
-            this.C3_v24_public = new C2_private();
+            this.C3_v24_public = new C2_private();// error 
         }
         return C3_public;
     })();
@@ -126,15 +126,15 @@ var m1;
     var m1_v1_private;
     m1.m1_v2_public;
     var m1_v3_private;
-    m1.m1_v4_public;
+    m1.m1_v4_public;// error 
     var m1_v11_private = new C1_public();
     m1.m1_v12_public = new C1_public();
     var m1_v13_private = new C2_private();
-    m1.m1_v14_public = new C2_private();
+    m1.m1_v14_public = new C2_private();//error  
     var m1_v21_private = new C1_public();
     m1.m1_v22_public = new C1_public();
     var m1_v23_private = new C2_private();
-    m1.m1_v24_public = new C2_private();
+    m1.m1_v24_public = new C2_private();// error 
 })(m1 || (m1 = {}));
 var glo_C1_public = (function () {
     function glo_C1_public() {
diff --git a/tests/baselines/reference/privacyVar.js b/tests/baselines/reference/privacyVar.js
index d4528fb34eb..eb6d257bc41 100644
--- a/tests/baselines/reference/privacyVar.js
+++ b/tests/baselines/reference/privacyVar.js
@@ -194,11 +194,11 @@ export var glo_v24_public: glo_C2_private = new glo_C2_private(); // error
             this.C3_v11_private = new C1_public();
             this.C3_v12_public = new C1_public();
             this.C3_v13_private = new C2_private();
-            this.C3_v14_public = new C2_private();
+            this.C3_v14_public = new C2_private();// error 
             this.C3_v21_private = new C1_public();
             this.C3_v22_public = new C1_public();
             this.C3_v23_private = new C2_private();
-            this.C3_v24_public = new C2_private();
+            this.C3_v24_public = new C2_private();// error 
         }
         return C3_public;
     })();
@@ -219,15 +219,15 @@ export var glo_v24_public: glo_C2_private = new glo_C2_private(); // error
     var m1_v1_private;
     m1.m1_v2_public;
     var m1_v3_private;
-    m1.m1_v4_public;
+    m1.m1_v4_public;// error 
     var m1_v11_private = new C1_public();
     m1.m1_v12_public = new C1_public();
     var m1_v13_private = new C2_private();
-    m1.m1_v14_public = new C2_private();
+    m1.m1_v14_public = new C2_private();//error  
     var m1_v21_private = new C1_public();
     m1.m1_v22_public = new C1_public();
     var m1_v23_private = new C2_private();
-    m1.m1_v24_public = new C2_private();
+    m1.m1_v24_public = new C2_private();// error 
 })(exports.m1 || (exports.m1 = {}));
 var m1 = exports.m1;
 var m2;
@@ -303,11 +303,11 @@ var glo_C3_public = (function () {
         this.glo_C3_v11_private = new glo_C1_public();
         this.glo_C3_v12_public = new glo_C1_public();
         this.glo_C3_v13_private = new glo_C2_private();
-        this.glo_C3_v14_public = new glo_C2_private();
+        this.glo_C3_v14_public = new glo_C2_private();// error  
         this.glo_C3_v21_private = new glo_C1_public();
         this.glo_C3_v22_public = new glo_C1_public();
         this.glo_C3_v23_private = new glo_C2_private();
-        this.glo_C3_v24_public = new glo_C2_private();
+        this.glo_C3_v24_public = new glo_C2_private();//error 
     }
     return glo_C3_public;
 })();
@@ -328,12 +328,12 @@ var glo_C4_public = (function () {
 var glo_v1_private;
 exports.glo_v2_public;
 var glo_v3_private;
-exports.glo_v4_public;
+exports.glo_v4_public;// error 
 var glo_v11_private = new glo_C1_public();
 exports.glo_v12_public = new glo_C1_public();
 var glo_v13_private = new glo_C2_private();
-exports.glo_v14_public = new glo_C2_private();
+exports.glo_v14_public = new glo_C2_private();// error 
 var glo_v21_private = new glo_C1_public();
 exports.glo_v22_public = new glo_C1_public();
 var glo_v23_private = new glo_C2_private();
-exports.glo_v24_public = new glo_C2_private();
+exports.glo_v24_public = new glo_C2_private();// error 
diff --git a/tests/baselines/reference/privacyVarDeclFile.js b/tests/baselines/reference/privacyVarDeclFile.js
index 922c056b3a7..2ad4d0b8c35 100644
--- a/tests/baselines/reference/privacyVarDeclFile.js
+++ b/tests/baselines/reference/privacyVarDeclFile.js
@@ -459,7 +459,7 @@ var privateClassWithWithPublicPropertyTypes = (function () {
     }
     return privateClassWithWithPublicPropertyTypes;
 })();
-exports.publicVarWithPrivatePropertyTypes;
+exports.publicVarWithPrivatePropertyTypes;// Error 
 exports.publicVarWithPublicPropertyTypes;
 var privateVarWithPrivatePropertyTypes;
 var privateVarWithPublicPropertyTypes;
@@ -469,7 +469,7 @@ var publicClassWithPrivateModulePropertyTypes = (function () {
     return publicClassWithPrivateModulePropertyTypes;
 })();
 exports.publicClassWithPrivateModulePropertyTypes = publicClassWithPrivateModulePropertyTypes;
-exports.publicVarWithPrivateModulePropertyTypes;
+exports.publicVarWithPrivateModulePropertyTypes;// Error 
 var privateClassWithPrivateModulePropertyTypes = (function () {
     function privateClassWithPrivateModulePropertyTypes() {
     }
@@ -510,7 +510,7 @@ var privateVarWithPrivateModulePropertyTypes;
         }
         return privateClassWithWithPublicPropertyTypes;
     })();
-    publicModule.publicVarWithPrivatePropertyTypes;
+    publicModule.publicVarWithPrivatePropertyTypes;// Error 
     publicModule.publicVarWithPublicPropertyTypes;
     var privateVarWithPrivatePropertyTypes;
     var privateVarWithPublicPropertyTypes;
@@ -520,7 +520,7 @@ var privateVarWithPrivateModulePropertyTypes;
         return publicClassWithPrivateModulePropertyTypes;
     })();
     publicModule.publicClassWithPrivateModulePropertyTypes = publicClassWithPrivateModulePropertyTypes;
-    publicModule.publicVarWithPrivateModulePropertyTypes;
+    publicModule.publicVarWithPrivateModulePropertyTypes;// Error 
     var privateClassWithPrivateModulePropertyTypes = (function () {
         function privateClassWithPrivateModulePropertyTypes() {
         }
@@ -682,7 +682,7 @@ var publicModuleInGlobal;
         }
         return privateClassWithWithPublicPropertyTypes;
     })();
-    publicModuleInGlobal.publicVarWithPrivatePropertyTypes;
+    publicModuleInGlobal.publicVarWithPrivatePropertyTypes;// Error 
     publicModuleInGlobal.publicVarWithPublicPropertyTypes;
     var privateVarWithPrivatePropertyTypes;
     var privateVarWithPublicPropertyTypes;
@@ -692,7 +692,7 @@ var publicModuleInGlobal;
         return publicClassWithPrivateModulePropertyTypes;
     })();
     publicModuleInGlobal.publicClassWithPrivateModulePropertyTypes = publicClassWithPrivateModulePropertyTypes;
-    publicModuleInGlobal.publicVarWithPrivateModulePropertyTypes;
+    publicModuleInGlobal.publicVarWithPrivateModulePropertyTypes;// Error 
     var privateClassWithPrivateModulePropertyTypes = (function () {
         function privateClassWithPrivateModulePropertyTypes() {
         }
diff --git a/tests/baselines/reference/privateStaticMemberAccessibility.js b/tests/baselines/reference/privateStaticMemberAccessibility.js
index b948139ecad..7aed14aa0cf 100644
--- a/tests/baselines/reference/privateStaticMemberAccessibility.js
+++ b/tests/baselines/reference/privateStaticMemberAccessibility.js
@@ -24,8 +24,8 @@ var Derived = (function (_super) {
     __extends(Derived, _super);
     function Derived() {
         _super.apply(this, arguments);
-        this.bing = function () { return Base.foo; };
+        this.bing = function () { return Base.foo; };// error 
     }
-    Derived.bar = Base.foo;
+    Derived.bar = Base.foo;// error 
     return Derived;
 })(Base);
diff --git a/tests/baselines/reference/privateStaticNotAccessibleInClodule.js b/tests/baselines/reference/privateStaticNotAccessibleInClodule.js
index a0b930db4d9..1a213caf8f2 100644
--- a/tests/baselines/reference/privateStaticNotAccessibleInClodule.js
+++ b/tests/baselines/reference/privateStaticNotAccessibleInClodule.js
@@ -19,5 +19,5 @@ var C = (function () {
 })();
 var C;
 (function (C) {
-    C.y = C.bar;
+    C.y = C.bar;// error 
 })(C || (C = {}));
diff --git a/tests/baselines/reference/privateStaticNotAccessibleInClodule2.js b/tests/baselines/reference/privateStaticNotAccessibleInClodule2.js
index 473a71663a7..bd5af72719f 100644
--- a/tests/baselines/reference/privateStaticNotAccessibleInClodule2.js
+++ b/tests/baselines/reference/privateStaticNotAccessibleInClodule2.js
@@ -36,5 +36,5 @@ var D = (function (_super) {
 })(C);
 var D;
 (function (D) {
-    D.y = D.bar;
+    D.y = D.bar;// error 
 })(D || (D = {}));
diff --git a/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/node/m5.js b/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/node/m5.js
index b9856df80d0..daa4208d91e 100644
--- a/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/node/m5.js
+++ b/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/node/m5.js
@@ -1,4 +1,4 @@
-var m4 = require("m4");
+var m4 = require("m4");// Emit used 
 function foo2() {
     return new m4.d();
 }
diff --git a/tests/baselines/reference/project/declarationsMultipleTimesImport/node/useModule.js b/tests/baselines/reference/project/declarationsMultipleTimesImport/node/useModule.js
index 2de3f23432a..3e4df4b7af0 100644
--- a/tests/baselines/reference/project/declarationsMultipleTimesImport/node/useModule.js
+++ b/tests/baselines/reference/project/declarationsMultipleTimesImport/node/useModule.js
@@ -1,4 +1,4 @@
-var m4 = require("m4");
+var m4 = require("m4");// Emit used 
 exports.x4 = m4.x;
 exports.d4 = m4.d;
 exports.f4 = m4.foo();
@@ -12,7 +12,7 @@ exports.f4 = m4.foo();
 })(exports.m1 || (exports.m1 = {}));
 var m1 = exports.m1;
 // Do not emit multiple used import statements
-var multiImport_m4 = require("m4");
+var multiImport_m4 = require("m4");// Emit used 
 exports.useMultiImport_m4_x4 = multiImport_m4.x;
 exports.useMultiImport_m4_d4 = multiImport_m4.d;
 exports.useMultiImport_m4_f4 = multiImport_m4.foo();
diff --git a/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/node/m5.js b/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/node/m5.js
index b9856df80d0..daa4208d91e 100644
--- a/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/node/m5.js
+++ b/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/node/m5.js
@@ -1,4 +1,4 @@
-var m4 = require("m4");
+var m4 = require("m4");// Emit used 
 function foo2() {
     return new m4.d();
 }
diff --git a/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/node/useModule.js b/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/node/useModule.js
index 80a5c980876..42990a15a45 100644
--- a/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/node/useModule.js
+++ b/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/node/useModule.js
@@ -1,4 +1,4 @@
-var m4 = require("m4");
+var m4 = require("m4");// Emit used 
 exports.x4 = m4.x;
 exports.d4 = m4.d;
 exports.f4 = m4.foo();
diff --git a/tests/baselines/reference/project/declarationsSimpleImport/node/useModule.js b/tests/baselines/reference/project/declarationsSimpleImport/node/useModule.js
index 23d0d8c66d5..bbd30f8178f 100644
--- a/tests/baselines/reference/project/declarationsSimpleImport/node/useModule.js
+++ b/tests/baselines/reference/project/declarationsSimpleImport/node/useModule.js
@@ -1,4 +1,4 @@
-var m4 = require("m4");
+var m4 = require("m4");// Emit used 
 exports.x4 = m4.x;
 exports.d4 = m4.d;
 exports.f4 = m4.foo();
diff --git a/tests/baselines/reference/promiseChaining.js b/tests/baselines/reference/promiseChaining.js
index c914937bd6c..0b27786529e 100644
--- a/tests/baselines/reference/promiseChaining.js
+++ b/tests/baselines/reference/promiseChaining.js
@@ -19,7 +19,7 @@ var Chain = (function () {
     Chain.prototype.then = function (cb) {
         var result = cb(this.value);
         // should get a fresh type parameter which each then call
-        var z = this.then(function (x) { return result; }).then(function (x) { return "abc"; }).then(function (x) { return x.length; });
+        var z = this.then(function (x) { return result; }).then(function (x) { return "abc"; }).then(function (x) { return x.length; })/*number*/ ;// No error 
         return new Chain(result);
     };
     return Chain;
diff --git a/tests/baselines/reference/promiseChaining1.js b/tests/baselines/reference/promiseChaining1.js
index a3633ba493f..827a4501349 100644
--- a/tests/baselines/reference/promiseChaining1.js
+++ b/tests/baselines/reference/promiseChaining1.js
@@ -19,7 +19,7 @@ var Chain2 = (function () {
     Chain2.prototype.then = function (cb) {
         var result = cb(this.value);
         // should get a fresh type parameter which each then call
-        var z = this.then(function (x) { return result; }).then(function (x) { return "abc"; }).then(function (x) { return x.length; });
+        var z = this.then(function (x) { return result; }).then(function (x) { return "abc"; }).then(function (x) { return x.length; })/*number*/ ;// Should error on "abc" because it is not a Function 
         return new Chain2(result);
     };
     return Chain2;
diff --git a/tests/baselines/reference/promisePermutations.js b/tests/baselines/reference/promisePermutations.js
index c143e20bde3..9a9f38a76ff 100644
--- a/tests/baselines/reference/promisePermutations.js
+++ b/tests/baselines/reference/promisePermutations.js
@@ -196,84 +196,84 @@ var s3d = s3.then(testFunction3P, testFunction3, testFunction3).then(testFunctio
 var r4;
 var sIPromise;
 var sPromise;
-var r4a = r4.then(testFunction4, testFunction4, testFunction4);
-var r4b = r4.then(sIPromise, testFunction4, testFunction4).then(sIPromise, testFunction4, testFunction4);
+var r4a = r4.then(testFunction4, testFunction4, testFunction4);// error 
+var r4b = r4.then(sIPromise, testFunction4, testFunction4).then(sIPromise, testFunction4, testFunction4);// ok 
 var s4;
-var s4a = s4.then(testFunction4, testFunction4, testFunction4);
-var s4b = s4.then(testFunction4P, testFunction4P, testFunction4P);
-var s4c = s4.then(testFunction4P, testFunction4, testFunction4);
+var s4a = s4.then(testFunction4, testFunction4, testFunction4);// error 
+var s4b = s4.then(testFunction4P, testFunction4P, testFunction4P);// error  
+var s4c = s4.then(testFunction4P, testFunction4, testFunction4);// error 
 var s4d = s4.then(sIPromise, testFunction4P, testFunction4).then(sIPromise, testFunction4P, testFunction4);
 var r5;
-var r5a = r5.then(testFunction5, testFunction5, testFunction5);
-var r5b = r5.then(sIPromise, sIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);
+var r5a = r5.then(testFunction5, testFunction5, testFunction5);// error 
+var r5b = r5.then(sIPromise, sIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);// ok 
 var s5;
-var s5a = s5.then(testFunction5, testFunction5, testFunction5);
-var s5b = s5.then(testFunction5P, testFunction5P, testFunction5P);
-var s5c = s5.then(testFunction5P, testFunction5, testFunction5);
-var s5d = s5.then(sPromise, sPromise, sPromise).then(sIPromise, sIPromise, sIPromise);
+var s5a = s5.then(testFunction5, testFunction5, testFunction5);// error 
+var s5b = s5.then(testFunction5P, testFunction5P, testFunction5P);// error 
+var s5c = s5.then(testFunction5P, testFunction5, testFunction5);// error 
+var s5d = s5.then(sPromise, sPromise, sPromise).then(sIPromise, sIPromise, sIPromise);// ok 
 var r6;
-var r6a = r6.then(testFunction6, testFunction6, testFunction6);
-var r6b = r6.then(sIPromise, sIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);
+var r6a = r6.then(testFunction6, testFunction6, testFunction6);// error 
+var r6b = r6.then(sIPromise, sIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);// ok 
 var s6;
-var s6a = s6.then(testFunction6, testFunction6, testFunction6);
-var s6b = s6.then(testFunction6P, testFunction6P, testFunction6P);
-var s6c = s6.then(testFunction6P, testFunction6, testFunction6);
-var s6d = s6.then(sPromise, sPromise, sPromise).then(sIPromise, sIPromise, sIPromise);
+var s6a = s6.then(testFunction6, testFunction6, testFunction6);// error 
+var s6b = s6.then(testFunction6P, testFunction6P, testFunction6P);// error 
+var s6c = s6.then(testFunction6P, testFunction6, testFunction6);// error 
+var s6d = s6.then(sPromise, sPromise, sPromise).then(sIPromise, sIPromise, sIPromise);// ok 
 var r7;
-var r7a = r7.then(testFunction7, testFunction7, testFunction7);
-var r7b = r7.then(sIPromise, sIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);
+var r7a = r7.then(testFunction7, testFunction7, testFunction7);// error 
+var r7b = r7.then(sIPromise, sIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);// ok 
 var s7;
-var s7a = r7.then(testFunction7, testFunction7, testFunction7);
-var s7b = r7.then(testFunction7P, testFunction7P, testFunction7P);
-var s7c = r7.then(testFunction7P, testFunction7, testFunction7);
-var s7d = r7.then(sPromise, sPromise, sPromise).then(sPromise, sPromise, sPromise);
+var s7a = r7.then(testFunction7, testFunction7, testFunction7);// error 
+var s7b = r7.then(testFunction7P, testFunction7P, testFunction7P);// error 
+var s7c = r7.then(testFunction7P, testFunction7, testFunction7);// error 
+var s7d = r7.then(sPromise, sPromise, sPromise).then(sPromise, sPromise, sPromise);// ok? 
 var r8;
 var nIPromise;
 var nPromise;
-var r8a = r8.then(testFunction8, testFunction8, testFunction8);
-var r8b = r8.then(nIPromise, nIPromise, nIPromise).then(nIPromise, nIPromise, nIPromise);
+var r8a = r8.then(testFunction8, testFunction8, testFunction8);// error 
+var r8b = r8.then(nIPromise, nIPromise, nIPromise).then(nIPromise, nIPromise, nIPromise);// ok 
 var s8;
-var s8a = s8.then(testFunction8, testFunction8, testFunction8);
-var s8b = s8.then(testFunction8P, testFunction8P, testFunction8P);
-var s8c = s8.then(testFunction8P, testFunction8, testFunction8);
-var s8d = s8.then(nIPromise, nIPromise, nIPromise).then(nIPromise, nIPromise, nIPromise);
+var s8a = s8.then(testFunction8, testFunction8, testFunction8);// error 
+var s8b = s8.then(testFunction8P, testFunction8P, testFunction8P);// error 
+var s8c = s8.then(testFunction8P, testFunction8, testFunction8);// error 
+var s8d = s8.then(nIPromise, nIPromise, nIPromise).then(nIPromise, nIPromise, nIPromise);// ok 
 var r9;
-var r9a = r9.then(testFunction9, testFunction9, testFunction9);
-var r9b = r9.then(sIPromise, sIPromise, sIPromise);
-var r9c = r9.then(nIPromise, nIPromise, nIPromise);
-var r9d = r9.then(testFunction, sIPromise, nIPromise);
-var r9e = r9.then(testFunction, nIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);
+var r9a = r9.then(testFunction9, testFunction9, testFunction9);// error 
+var r9b = r9.then(sIPromise, sIPromise, sIPromise);// ok 
+var r9c = r9.then(nIPromise, nIPromise, nIPromise);// ok 
+var r9d = r9.then(testFunction, sIPromise, nIPromise);// ok 
+var r9e = r9.then(testFunction, nIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);// ok 
 var s9;
-var s9a = s9.then(testFunction9, testFunction9, testFunction9);
-var s9b = s9.then(testFunction9P, testFunction9P, testFunction9P);
-var s9c = s9.then(testFunction9P, testFunction9, testFunction9);
-var s9d = s9.then(sPromise, sPromise, sPromise);
-var s9e = s9.then(nPromise, nPromise, nPromise);
-var s9f = s9.then(testFunction, sIPromise, nIPromise);
-var s9g = s9.then(testFunction, nIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);
+var s9a = s9.then(testFunction9, testFunction9, testFunction9);// error 
+var s9b = s9.then(testFunction9P, testFunction9P, testFunction9P);// error 
+var s9c = s9.then(testFunction9P, testFunction9, testFunction9);// error 
+var s9d = s9.then(sPromise, sPromise, sPromise);// ok 
+var s9e = s9.then(nPromise, nPromise, nPromise);// ok 
+var s9f = s9.then(testFunction, sIPromise, nIPromise);// ok 
+var s9g = s9.then(testFunction, nIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);// ok 
 var r10 = testFunction10(function (x) { return x; });
-var r10a = r10.then(testFunction10, testFunction10, testFunction10);
-var r10b = r10.then(sIPromise, sIPromise, sIPromise);
-var r10c = r10.then(nIPromise, nIPromise, nIPromise);
-var r10d = r10.then(testFunction, sIPromise, nIPromise);
-var r10e = r10.then(testFunction, nIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);
+var r10a = r10.then(testFunction10, testFunction10, testFunction10);// ok 
+var r10b = r10.then(sIPromise, sIPromise, sIPromise);// ok 
+var r10c = r10.then(nIPromise, nIPromise, nIPromise);// ok 
+var r10d = r10.then(testFunction, sIPromise, nIPromise);// ok 
+var r10e = r10.then(testFunction, nIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);// ok 
 var s10 = testFunction10P(function (x) { return x; });
-var s10a = s10.then(testFunction10, testFunction10, testFunction10);
-var s10b = s10.then(testFunction10P, testFunction10P, testFunction10P);
-var s10c = s10.then(testFunction10P, testFunction10, testFunction10);
-var s10d = s10.then(sPromise, sPromise, sPromise);
-var s10e = s10.then(nIPromise, nPromise, nIPromise);
-var s10f = s10.then(testFunctionP, sIPromise, nIPromise);
-var s10g = s10.then(testFunctionP, nIPromise, sIPromise).then(sPromise, sIPromise, sIPromise);
+var s10a = s10.then(testFunction10, testFunction10, testFunction10);// ok 
+var s10b = s10.then(testFunction10P, testFunction10P, testFunction10P);// ok 
+var s10c = s10.then(testFunction10P, testFunction10, testFunction10);// ok 
+var s10d = s10.then(sPromise, sPromise, sPromise);// ok 
+var s10e = s10.then(nIPromise, nPromise, nIPromise);// ok 
+var s10f = s10.then(testFunctionP, sIPromise, nIPromise);// ok 
+var s10g = s10.then(testFunctionP, nIPromise, sIPromise).then(sPromise, sIPromise, sIPromise);// ok 
 var r11;
-var r11a = r11.then(testFunction11, testFunction11, testFunction11);
+var r11a = r11.then(testFunction11, testFunction11, testFunction11);// ok 
 var s11;
-var s11a = s11.then(testFunction11, testFunction11, testFunction11);
-var s11b = s11.then(testFunction11P, testFunction11P, testFunction11P);
-var s11c = s11.then(testFunction11P, testFunction11, testFunction11);
+var s11a = s11.then(testFunction11, testFunction11, testFunction11);// ok 
+var s11b = s11.then(testFunction11P, testFunction11P, testFunction11P);// ok 
+var s11c = s11.then(testFunction11P, testFunction11, testFunction11);// ok 
 var r12 = testFunction12(function (x) { return x; });
-var r12a = r12.then(testFunction12, testFunction12, testFunction12);
+var r12a = r12.then(testFunction12, testFunction12, testFunction12);// ok 
 var s12 = testFunction12(function (x) { return x; });
-var s12a = s12.then(testFunction12, testFunction12, testFunction12);
-var s12b = s12.then(testFunction12P, testFunction12P, testFunction12P);
-var s12c = s12.then(testFunction12P, testFunction12, testFunction12);
+var s12a = s12.then(testFunction12, testFunction12, testFunction12);// ok 
+var s12b = s12.then(testFunction12P, testFunction12P, testFunction12P);// ok 
+var s12c = s12.then(testFunction12P, testFunction12, testFunction12);// ok 
diff --git a/tests/baselines/reference/promisePermutations2.js b/tests/baselines/reference/promisePermutations2.js
index 12f90880bc7..d9b1395036a 100644
--- a/tests/baselines/reference/promisePermutations2.js
+++ b/tests/baselines/reference/promisePermutations2.js
@@ -191,88 +191,88 @@ var s3;
 var s3a = s3.then(testFunction3, testFunction3, testFunction3);
 var s3b = s3.then(testFunction3P, testFunction3P, testFunction3P);
 var s3c = s3.then(testFunction3P, testFunction3, testFunction3);
-var s3d = s3.then(testFunction3P, testFunction3, testFunction3).then(testFunction3, testFunction3, testFunction3);
+var s3d = s3.then(testFunction3P, testFunction3, testFunction3).then(testFunction3, testFunction3, testFunction3);// Should error 
 var r4;
 var sIPromise;
 var sPromise;
-var r4a = r4.then(testFunction4, testFunction4, testFunction4);
-var r4b = r4.then(sIPromise, testFunction4, testFunction4).then(sIPromise, testFunction4, testFunction4);
+var r4a = r4.then(testFunction4, testFunction4, testFunction4);// error 
+var r4b = r4.then(sIPromise, testFunction4, testFunction4).then(sIPromise, testFunction4, testFunction4);// ok 
 var s4;
-var s4a = s4.then(testFunction4, testFunction4, testFunction4);
-var s4b = s4.then(testFunction4P, testFunction4P, testFunction4P);
-var s4c = s4.then(testFunction4P, testFunction4, testFunction4);
+var s4a = s4.then(testFunction4, testFunction4, testFunction4);// error 
+var s4b = s4.then(testFunction4P, testFunction4P, testFunction4P);// error  
+var s4c = s4.then(testFunction4P, testFunction4, testFunction4);// error 
 var s4d = s4.then(sIPromise, testFunction4P, testFunction4).then(sIPromise, testFunction4P, testFunction4);
 var r5;
-var r5a = r5.then(testFunction5, testFunction5, testFunction5);
-var r5b = r5.then(sIPromise, sIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);
+var r5a = r5.then(testFunction5, testFunction5, testFunction5);// error 
+var r5b = r5.then(sIPromise, sIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);// ok 
 var s5;
-var s5a = s5.then(testFunction5, testFunction5, testFunction5);
-var s5b = s5.then(testFunction5P, testFunction5P, testFunction5P);
-var s5c = s5.then(testFunction5P, testFunction5, testFunction5);
-var s5d = s5.then(sPromise, sPromise, sPromise).then(sIPromise, sIPromise, sIPromise);
+var s5a = s5.then(testFunction5, testFunction5, testFunction5);// error 
+var s5b = s5.then(testFunction5P, testFunction5P, testFunction5P);// error 
+var s5c = s5.then(testFunction5P, testFunction5, testFunction5);// error 
+var s5d = s5.then(sPromise, sPromise, sPromise).then(sIPromise, sIPromise, sIPromise);// ok 
 var r6;
-var r6a = r6.then(testFunction6, testFunction6, testFunction6);
-var r6b = r6.then(sIPromise, sIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);
+var r6a = r6.then(testFunction6, testFunction6, testFunction6);// error 
+var r6b = r6.then(sIPromise, sIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);// ok 
 var s6;
-var s6a = s6.then(testFunction6, testFunction6, testFunction6);
-var s6b = s6.then(testFunction6P, testFunction6P, testFunction6P);
-var s6c = s6.then(testFunction6P, testFunction6, testFunction6);
-var s6d = s6.then(sPromise, sPromise, sPromise).then(sIPromise, sIPromise, sIPromise);
+var s6a = s6.then(testFunction6, testFunction6, testFunction6);// error 
+var s6b = s6.then(testFunction6P, testFunction6P, testFunction6P);// error 
+var s6c = s6.then(testFunction6P, testFunction6, testFunction6);// error 
+var s6d = s6.then(sPromise, sPromise, sPromise).then(sIPromise, sIPromise, sIPromise);// ok 
 var r7;
-var r7a = r7.then(testFunction7, testFunction7, testFunction7);
-var r7b = r7.then(sIPromise, sIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);
+var r7a = r7.then(testFunction7, testFunction7, testFunction7);// error 
+var r7b = r7.then(sIPromise, sIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);// ok 
 var s7;
-var s7a = r7.then(testFunction7, testFunction7, testFunction7);
-var s7b = r7.then(testFunction7P, testFunction7P, testFunction7P);
-var s7c = r7.then(testFunction7P, testFunction7, testFunction7);
-var s7d = r7.then(sPromise, sPromise, sPromise).then(sPromise, sPromise, sPromise);
+var s7a = r7.then(testFunction7, testFunction7, testFunction7);// error 
+var s7b = r7.then(testFunction7P, testFunction7P, testFunction7P);// error 
+var s7c = r7.then(testFunction7P, testFunction7, testFunction7);// error 
+var s7d = r7.then(sPromise, sPromise, sPromise).then(sPromise, sPromise, sPromise);// ok? 
 var r8;
 var nIPromise;
 var nPromise;
-var r8a = r8.then(testFunction8, testFunction8, testFunction8);
-var r8b = r8.then(nIPromise, nIPromise, nIPromise).then(nIPromise, nIPromise, nIPromise);
+var r8a = r8.then(testFunction8, testFunction8, testFunction8);// error 
+var r8b = r8.then(nIPromise, nIPromise, nIPromise).then(nIPromise, nIPromise, nIPromise);// ok 
 var s8;
-var s8a = s8.then(testFunction8, testFunction8, testFunction8);
-var s8b = s8.then(testFunction8P, testFunction8P, testFunction8P);
-var s8c = s8.then(testFunction8P, testFunction8, testFunction8);
-var s8d = s8.then(nIPromise, nIPromise, nIPromise).then(nIPromise, nIPromise, nIPromise);
+var s8a = s8.then(testFunction8, testFunction8, testFunction8);// error 
+var s8b = s8.then(testFunction8P, testFunction8P, testFunction8P);// error 
+var s8c = s8.then(testFunction8P, testFunction8, testFunction8);// error 
+var s8d = s8.then(nIPromise, nIPromise, nIPromise).then(nIPromise, nIPromise, nIPromise);// ok 
 var r9;
-var r9a = r9.then(testFunction9, testFunction9, testFunction9);
-var r9b = r9.then(sIPromise, sIPromise, sIPromise);
-var r9c = r9.then(nIPromise, nIPromise, nIPromise);
-var r9d = r9.then(testFunction, sIPromise, nIPromise);
-var r9e = r9.then(testFunction, nIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);
+var r9a = r9.then(testFunction9, testFunction9, testFunction9);// error 
+var r9b = r9.then(sIPromise, sIPromise, sIPromise);// ok 
+var r9c = r9.then(nIPromise, nIPromise, nIPromise);// ok 
+var r9d = r9.then(testFunction, sIPromise, nIPromise);// ok 
+var r9e = r9.then(testFunction, nIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);// ok 
 var s9;
-var s9a = s9.then(testFunction9, testFunction9, testFunction9);
-var s9b = s9.then(testFunction9P, testFunction9P, testFunction9P);
-var s9c = s9.then(testFunction9P, testFunction9, testFunction9);
-var s9d = s9.then(sPromise, sPromise, sPromise);
-var s9e = s9.then(nPromise, nPromise, nPromise);
-var s9f = s9.then(testFunction, sIPromise, nIPromise);
-var s9g = s9.then(testFunction, nIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);
+var s9a = s9.then(testFunction9, testFunction9, testFunction9);// error 
+var s9b = s9.then(testFunction9P, testFunction9P, testFunction9P);// error 
+var s9c = s9.then(testFunction9P, testFunction9, testFunction9);// error 
+var s9d = s9.then(sPromise, sPromise, sPromise);// ok 
+var s9e = s9.then(nPromise, nPromise, nPromise);// ok 
+var s9f = s9.then(testFunction, sIPromise, nIPromise);// ok 
+var s9g = s9.then(testFunction, nIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);// ok 
 var r10 = testFunction10(function (x) { return x; });
-var r10a = r10.then(testFunction10, testFunction10, testFunction10);
-var r10b = r10.then(sIPromise, sIPromise, sIPromise);
-var r10c = r10.then(nIPromise, nIPromise, nIPromise);
-var r10d = r10.then(testFunction, sIPromise, nIPromise);
-var r10e = r10.then(testFunction, nIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);
+var r10a = r10.then(testFunction10, testFunction10, testFunction10);// ok 
+var r10b = r10.then(sIPromise, sIPromise, sIPromise);// ok 
+var r10c = r10.then(nIPromise, nIPromise, nIPromise);// ok 
+var r10d = r10.then(testFunction, sIPromise, nIPromise);// ok 
+var r10e = r10.then(testFunction, nIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);// ok 
 var s10 = testFunction10P(function (x) { return x; });
-var s10a = s10.then(testFunction10, testFunction10, testFunction10);
-var s10b = s10.then(testFunction10P, testFunction10P, testFunction10P);
-var s10c = s10.then(testFunction10P, testFunction10, testFunction10);
-var s10d = s10.then(sPromise, sPromise, sPromise);
-var s10e = s10.then(nIPromise, nPromise, nIPromise);
-var s10f = s10.then(testFunctionP, sIPromise, nIPromise);
-var s10g = s10.then(testFunctionP, nIPromise, sIPromise).then(sPromise, sIPromise, sIPromise);
+var s10a = s10.then(testFunction10, testFunction10, testFunction10);// ok 
+var s10b = s10.then(testFunction10P, testFunction10P, testFunction10P);// ok 
+var s10c = s10.then(testFunction10P, testFunction10, testFunction10);// ok 
+var s10d = s10.then(sPromise, sPromise, sPromise);// ok 
+var s10e = s10.then(nIPromise, nPromise, nIPromise);// ok 
+var s10f = s10.then(testFunctionP, sIPromise, nIPromise);// ok 
+var s10g = s10.then(testFunctionP, nIPromise, sIPromise).then(sPromise, sIPromise, sIPromise);// ok 
 var r11;
-var r11a = r11.then(testFunction11, testFunction11, testFunction11);
+var r11a = r11.then(testFunction11, testFunction11, testFunction11);// ok 
 var s11;
-var s11a = s11.then(testFunction11, testFunction11, testFunction11);
-var s11b = s11.then(testFunction11P, testFunction11P, testFunction11P);
-var s11c = s11.then(testFunction11P, testFunction11, testFunction11);
+var s11a = s11.then(testFunction11, testFunction11, testFunction11);// ok 
+var s11b = s11.then(testFunction11P, testFunction11P, testFunction11P);// ok 
+var s11c = s11.then(testFunction11P, testFunction11, testFunction11);// ok 
 var r12 = testFunction12(function (x) { return x; });
-var r12a = r12.then(testFunction12, testFunction12, testFunction12);
+var r12a = r12.then(testFunction12, testFunction12, testFunction12);// ok 
 var s12 = testFunction12(function (x) { return x; });
-var s12a = s12.then(testFunction12, testFunction12, testFunction12);
-var s12b = s12.then(testFunction12P, testFunction12P, testFunction12P);
-var s12c = s12.then(testFunction12P, testFunction12, testFunction12);
+var s12a = s12.then(testFunction12, testFunction12, testFunction12);// ok 
+var s12b = s12.then(testFunction12P, testFunction12P, testFunction12P);// ok 
+var s12c = s12.then(testFunction12P, testFunction12, testFunction12);// ok 
diff --git a/tests/baselines/reference/promisePermutations3.js b/tests/baselines/reference/promisePermutations3.js
index a5aaf917020..83138bc875d 100644
--- a/tests/baselines/reference/promisePermutations3.js
+++ b/tests/baselines/reference/promisePermutations3.js
@@ -195,84 +195,84 @@ var s3d = s3.then(testFunction3P, testFunction3, testFunction3).then(testFunctio
 var r4;
 var sIPromise;
 var sPromise;
-var r4a = r4.then(testFunction4, testFunction4, testFunction4);
-var r4b = r4.then(sIPromise, testFunction4, testFunction4).then(sIPromise, testFunction4, testFunction4);
+var r4a = r4.then(testFunction4, testFunction4, testFunction4);// error 
+var r4b = r4.then(sIPromise, testFunction4, testFunction4).then(sIPromise, testFunction4, testFunction4);// ok 
 var s4;
-var s4a = s4.then(testFunction4, testFunction4, testFunction4);
-var s4b = s4.then(testFunction4P, testFunction4P, testFunction4P);
-var s4c = s4.then(testFunction4P, testFunction4, testFunction4);
+var s4a = s4.then(testFunction4, testFunction4, testFunction4);// error 
+var s4b = s4.then(testFunction4P, testFunction4P, testFunction4P);// error  
+var s4c = s4.then(testFunction4P, testFunction4, testFunction4);// error 
 var s4d = s4.then(sIPromise, testFunction4P, testFunction4).then(sIPromise, testFunction4P, testFunction4);
 var r5;
-var r5a = r5.then(testFunction5, testFunction5, testFunction5);
-var r5b = r5.then(sIPromise, sIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);
+var r5a = r5.then(testFunction5, testFunction5, testFunction5);// error 
+var r5b = r5.then(sIPromise, sIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);// ok 
 var s5;
-var s5a = s5.then(testFunction5, testFunction5, testFunction5);
-var s5b = s5.then(testFunction5P, testFunction5P, testFunction5P);
-var s5c = s5.then(testFunction5P, testFunction5, testFunction5);
-var s5d = s5.then(sPromise, sPromise, sPromise).then(sIPromise, sIPromise, sIPromise);
+var s5a = s5.then(testFunction5, testFunction5, testFunction5);// error 
+var s5b = s5.then(testFunction5P, testFunction5P, testFunction5P);// error 
+var s5c = s5.then(testFunction5P, testFunction5, testFunction5);// error 
+var s5d = s5.then(sPromise, sPromise, sPromise).then(sIPromise, sIPromise, sIPromise);// ok 
 var r6;
-var r6a = r6.then(testFunction6, testFunction6, testFunction6);
-var r6b = r6.then(sIPromise, sIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);
+var r6a = r6.then(testFunction6, testFunction6, testFunction6);// error 
+var r6b = r6.then(sIPromise, sIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);// ok 
 var s6;
-var s6a = s6.then(testFunction6, testFunction6, testFunction6);
-var s6b = s6.then(testFunction6P, testFunction6P, testFunction6P);
-var s6c = s6.then(testFunction6P, testFunction6, testFunction6);
-var s6d = s6.then(sPromise, sPromise, sPromise).then(sIPromise, sIPromise, sIPromise);
+var s6a = s6.then(testFunction6, testFunction6, testFunction6);// error 
+var s6b = s6.then(testFunction6P, testFunction6P, testFunction6P);// error 
+var s6c = s6.then(testFunction6P, testFunction6, testFunction6);// error 
+var s6d = s6.then(sPromise, sPromise, sPromise).then(sIPromise, sIPromise, sIPromise);// ok 
 var r7;
-var r7a = r7.then(testFunction7, testFunction7, testFunction7);
-var r7b = r7.then(sIPromise, sIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);
+var r7a = r7.then(testFunction7, testFunction7, testFunction7);// error 
+var r7b = r7.then(sIPromise, sIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);// ok 
 var s7;
-var s7a = r7.then(testFunction7, testFunction7, testFunction7);
-var s7b = r7.then(testFunction7P, testFunction7P, testFunction7P);
-var s7c = r7.then(testFunction7P, testFunction7, testFunction7);
-var s7d = r7.then(sPromise, sPromise, sPromise).then(sPromise, sPromise, sPromise);
+var s7a = r7.then(testFunction7, testFunction7, testFunction7);// error 
+var s7b = r7.then(testFunction7P, testFunction7P, testFunction7P);// error 
+var s7c = r7.then(testFunction7P, testFunction7, testFunction7);// error 
+var s7d = r7.then(sPromise, sPromise, sPromise).then(sPromise, sPromise, sPromise);// ok? 
 var r8;
 var nIPromise;
 var nPromise;
-var r8a = r8.then(testFunction8, testFunction8, testFunction8);
-var r8b = r8.then(nIPromise, nIPromise, nIPromise).then(nIPromise, nIPromise, nIPromise);
+var r8a = r8.then(testFunction8, testFunction8, testFunction8);// error 
+var r8b = r8.then(nIPromise, nIPromise, nIPromise).then(nIPromise, nIPromise, nIPromise);// ok 
 var s8;
-var s8a = s8.then(testFunction8, testFunction8, testFunction8);
-var s8b = s8.then(testFunction8P, testFunction8P, testFunction8P);
-var s8c = s8.then(testFunction8P, testFunction8, testFunction8);
-var s8d = s8.then(nIPromise, nIPromise, nIPromise).then(nIPromise, nIPromise, nIPromise);
+var s8a = s8.then(testFunction8, testFunction8, testFunction8);// error 
+var s8b = s8.then(testFunction8P, testFunction8P, testFunction8P);// error 
+var s8c = s8.then(testFunction8P, testFunction8, testFunction8);// error 
+var s8d = s8.then(nIPromise, nIPromise, nIPromise).then(nIPromise, nIPromise, nIPromise);// ok 
 var r9;
-var r9a = r9.then(testFunction9, testFunction9, testFunction9);
-var r9b = r9.then(sIPromise, sIPromise, sIPromise);
-var r9c = r9.then(nIPromise, nIPromise, nIPromise);
-var r9d = r9.then(testFunction, sIPromise, nIPromise);
-var r9e = r9.then(testFunction, nIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);
+var r9a = r9.then(testFunction9, testFunction9, testFunction9);// error 
+var r9b = r9.then(sIPromise, sIPromise, sIPromise);// ok 
+var r9c = r9.then(nIPromise, nIPromise, nIPromise);// ok 
+var r9d = r9.then(testFunction, sIPromise, nIPromise);// ok 
+var r9e = r9.then(testFunction, nIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);// ok 
 var s9;
-var s9a = s9.then(testFunction9, testFunction9, testFunction9);
-var s9b = s9.then(testFunction9P, testFunction9P, testFunction9P);
-var s9c = s9.then(testFunction9P, testFunction9, testFunction9);
-var s9d = s9.then(sPromise, sPromise, sPromise);
-var s9e = s9.then(nPromise, nPromise, nPromise);
-var s9f = s9.then(testFunction, sIPromise, nIPromise);
-var s9g = s9.then(testFunction, nIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);
+var s9a = s9.then(testFunction9, testFunction9, testFunction9);// error 
+var s9b = s9.then(testFunction9P, testFunction9P, testFunction9P);// error 
+var s9c = s9.then(testFunction9P, testFunction9, testFunction9);// error 
+var s9d = s9.then(sPromise, sPromise, sPromise);// ok 
+var s9e = s9.then(nPromise, nPromise, nPromise);// ok 
+var s9f = s9.then(testFunction, sIPromise, nIPromise);// ok 
+var s9g = s9.then(testFunction, nIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);// ok 
 var r10 = testFunction10(function (x) { return x; });
-var r10a = r10.then(testFunction10, testFunction10, testFunction10);
-var r10b = r10.then(sIPromise, sIPromise, sIPromise);
-var r10c = r10.then(nIPromise, nIPromise, nIPromise);
-var r10d = r10.then(testFunction, sIPromise, nIPromise);
-var r10e = r10.then(testFunction, nIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);
+var r10a = r10.then(testFunction10, testFunction10, testFunction10);// ok 
+var r10b = r10.then(sIPromise, sIPromise, sIPromise);// ok 
+var r10c = r10.then(nIPromise, nIPromise, nIPromise);// ok 
+var r10d = r10.then(testFunction, sIPromise, nIPromise);// ok 
+var r10e = r10.then(testFunction, nIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise);// ok 
 var s10 = testFunction10P(function (x) { return x; });
-var s10a = s10.then(testFunction10, testFunction10, testFunction10);
-var s10b = s10.then(testFunction10P, testFunction10P, testFunction10P);
-var s10c = s10.then(testFunction10P, testFunction10, testFunction10);
-var s10d = s10.then(sPromise, sPromise, sPromise);
-var s10e = s10.then(nIPromise, nPromise, nIPromise);
-var s10f = s10.then(testFunctionP, sIPromise, nIPromise);
-var s10g = s10.then(testFunctionP, nIPromise, sIPromise).then(sPromise, sIPromise, sIPromise);
+var s10a = s10.then(testFunction10, testFunction10, testFunction10);// ok 
+var s10b = s10.then(testFunction10P, testFunction10P, testFunction10P);// ok 
+var s10c = s10.then(testFunction10P, testFunction10, testFunction10);// ok 
+var s10d = s10.then(sPromise, sPromise, sPromise);// ok 
+var s10e = s10.then(nIPromise, nPromise, nIPromise);// ok 
+var s10f = s10.then(testFunctionP, sIPromise, nIPromise);// ok 
+var s10g = s10.then(testFunctionP, nIPromise, sIPromise).then(sPromise, sIPromise, sIPromise);// ok 
 var r11;
-var r11a = r11.then(testFunction11, testFunction11, testFunction11);
+var r11a = r11.then(testFunction11, testFunction11, testFunction11);// ok 
 var s11;
-var s11a = s11.then(testFunction11, testFunction11, testFunction11);
-var s11b = s11.then(testFunction11P, testFunction11P, testFunction11P);
-var s11c = s11.then(testFunction11P, testFunction11, testFunction11);
+var s11a = s11.then(testFunction11, testFunction11, testFunction11);// ok 
+var s11b = s11.then(testFunction11P, testFunction11P, testFunction11P);// ok 
+var s11c = s11.then(testFunction11P, testFunction11, testFunction11);// ok 
 var r12 = testFunction12(function (x) { return x; });
-var r12a = r12.then(testFunction12, testFunction12, testFunction12);
+var r12a = r12.then(testFunction12, testFunction12, testFunction12);// ok 
 var s12 = testFunction12(function (x) { return x; });
-var s12a = s12.then(testFunction12, testFunction12, testFunction12);
-var s12b = s12.then(testFunction12P, testFunction12P, testFunction12P);
-var s12c = s12.then(testFunction12P, testFunction12, testFunction12);
+var s12a = s12.then(testFunction12, testFunction12, testFunction12);// ok 
+var s12b = s12.then(testFunction12P, testFunction12P, testFunction12P);// ok 
+var s12c = s12.then(testFunction12P, testFunction12, testFunction12);// ok 
diff --git a/tests/baselines/reference/promiseTest.js b/tests/baselines/reference/promiseTest.js
index 0893770e0ce..0e64ff72478 100644
--- a/tests/baselines/reference/promiseTest.js
+++ b/tests/baselines/reference/promiseTest.js
@@ -20,4 +20,4 @@ var p = null;
 var p2 = p.then(function (x) {
     return p;
 });
-var x = p2.data;
+var x = p2.data;// number 
diff --git a/tests/baselines/reference/propertyAccess.js b/tests/baselines/reference/propertyAccess.js
index e4682316baf..43baafbb1f6 100644
--- a/tests/baselines/reference/propertyAccess.js
+++ b/tests/baselines/reference/propertyAccess.js
@@ -160,7 +160,7 @@ var aa = obj.x;
 // Dotted property access of property that exists on value's apparent type
 var bb = obj.hasOwnProperty;
 // Dotted property access of property that doesn't exist on value's apparent type
-var cc = obj.qqq;
+var cc = obj.qqq;// error 
 // Bracket notation property access using string literal value on type with property of that literal name
 var dd = obj['literal property'];
 var dd;
@@ -186,7 +186,7 @@ var jj;
 var kk = numIndex['what'];
 var kk;
 // Bracket notation property access using value of other type on type with numeric index signature and no string index signature
-var ll = numIndex[window];
+var ll = numIndex[window];// Error 
 // Bracket notation property access using string value on type with string index signature and no numeric index signature
 var mm = strIndex['N'];
 var mm;
@@ -214,7 +214,7 @@ var ss;
 var tt = noIndex[null];
 var tt;
 // Bracket notation property access using values of other types on type with no index signatures
-var uu = noIndex[window];
+var uu = noIndex[window];// Error 
 // Bracket notation property access using numeric value on type with numeric index signature and string index signature
 var vv = noIndex[32];
 var vv;
@@ -231,4 +231,4 @@ var yy;
 var zz = bothIndex['1.0'];
 var zz;
 // Bracket notation property access using value of other type on type with numeric index signature and no string index signature and string index signature
-var zzzz = bothIndex[window];
+var zzzz = bothIndex[window];// Error 
diff --git a/tests/baselines/reference/propertyAccessOnTypeParameterWithConstraints.js b/tests/baselines/reference/propertyAccessOnTypeParameterWithConstraints.js
index a188e7c9557..d1e26d9779e 100644
--- a/tests/baselines/reference/propertyAccessOnTypeParameterWithConstraints.js
+++ b/tests/baselines/reference/propertyAccessOnTypeParameterWithConstraints.js
@@ -42,7 +42,7 @@ var C = (function () {
     }
     C.prototype.f = function () {
         var x;
-        var a = x['getDate']();
+        var a = x['getDate']();// number 
         return a + x.getDate();
     };
     return C;
@@ -56,7 +56,7 @@ var r3 = a().getDate();
 var r3b = a()['getDate']();
 var b = {
     foo: function (x) {
-        var a = x['getDate']();
+        var a = x['getDate']();// number 
         return a + x.getDate();
     }
 };
diff --git a/tests/baselines/reference/propertyAccessOnTypeParameterWithConstraints2.js b/tests/baselines/reference/propertyAccessOnTypeParameterWithConstraints2.js
index 0dc561bc108..7996db794d3 100644
--- a/tests/baselines/reference/propertyAccessOnTypeParameterWithConstraints2.js
+++ b/tests/baselines/reference/propertyAccessOnTypeParameterWithConstraints2.js
@@ -112,11 +112,11 @@ var C = (function () {
     }
     C.prototype.f = function () {
         var x;
-        var a = x['foo']();
+        var a = x['foo']();// should be string 
         return a + x.foo();
     };
     C.prototype.g = function (x) {
-        var a = x['foo']();
+        var a = x['foo']();// should be string 
         return a + x.foo();
     };
     return C;
@@ -154,7 +154,7 @@ var r3c = a(aB, aB).foo();
 var r3d = a(aB, aB)['foo']();
 var b = {
     foo: function (x, y) {
-        var a = x['foo']();
+        var a = x['foo']();// should be string 
         return a + x.foo();
     }
 };
@@ -164,4 +164,4 @@ var b = {
 //        return a + x.foo();
 //    }
 //}
-var r4 = b.foo(aB, aB);
+var r4 = b.foo(aB, aB);// no inferences for T so constraint isn't satisfied, error 
diff --git a/tests/baselines/reference/propertyAccessOnTypeParameterWithConstraints3.js b/tests/baselines/reference/propertyAccessOnTypeParameterWithConstraints3.js
index ed5fa969818..32bc234f9e8 100644
--- a/tests/baselines/reference/propertyAccessOnTypeParameterWithConstraints3.js
+++ b/tests/baselines/reference/propertyAccessOnTypeParameterWithConstraints3.js
@@ -88,12 +88,12 @@ var C = (function () {
     C.prototype.f = function () {
         var x;
         // BUG 823818
-        var a = x['foo']();
+        var a = x['foo']();// should be string 
         return a + x.foo();
     };
     C.prototype.g = function (x) {
         // BUG 823818
-        var a = x['foo']();
+        var a = x['foo']();// should be string 
         return a + x.foo();
     };
     return C;
@@ -104,16 +104,16 @@ var i;
 var r2 = i.foo.foo();
 var r2b = i.foo['foo']();
 var a;
-var r3 = a().foo();
+var r3 = a().foo();// error, no inferences for U so it doesn't satisfy constraint 
 var r3b = a()['foo']();
 // parameter supplied for type argument inference for U
-var r3c = a(new B()).foo();
-var r3d = a(new B())['foo']();
+var r3c = a(new B()).foo();// valid call to an invalid function, U is inferred as B, which has a foo 
+var r3d = a(new B())['foo']();// valid call to an invalid function, U is inferred as B, which has a foo 
 var b = {
     foo: function (x) {
         // BUG 823818
-        var a = x['foo']();
+        var a = x['foo']();// should be string 
         return a + x.foo();
     }
 };
-var r4 = b.foo(new B());
+var r4 = b.foo(new B());// valid call to an invalid function 
diff --git a/tests/baselines/reference/propertyAccessOnTypeParameterWithConstraints4.js b/tests/baselines/reference/propertyAccessOnTypeParameterWithConstraints4.js
index 05a0b9203b9..1ffd2e7c784 100644
--- a/tests/baselines/reference/propertyAccessOnTypeParameterWithConstraints4.js
+++ b/tests/baselines/reference/propertyAccessOnTypeParameterWithConstraints4.js
@@ -38,7 +38,7 @@ var C = (function () {
     }
     C.prototype.f = function () {
         var x;
-        var a = x['notHere']();
+        var a = x['notHere']();// should be string 
         return a + x.notHere();
     };
     return C;
@@ -52,7 +52,7 @@ var r3 = a().notHere();
 var r3b = a()['notHere']();
 var b = {
     foo: function (x) {
-        var a = x['notHere']();
+        var a = x['notHere']();// should be string 
         return a + x.notHere();
     },
     bar: b.foo().notHere()
diff --git a/tests/baselines/reference/propertyAccessOnTypeParameterWithConstraints5.js b/tests/baselines/reference/propertyAccessOnTypeParameterWithConstraints5.js
index 776d8d803b7..840fd78a625 100644
--- a/tests/baselines/reference/propertyAccessOnTypeParameterWithConstraints5.js
+++ b/tests/baselines/reference/propertyAccessOnTypeParameterWithConstraints5.js
@@ -74,7 +74,7 @@ var C = (function () {
     }
     C.prototype.f = function () {
         var x;
-        var a = x['foo']();
+        var a = x['foo']();// should be string 
         return a + x.foo() + x.notHere();
     };
     return C;
@@ -89,10 +89,10 @@ var r3 = a().notHere();
 var r3b = a()['foo']();
 var b = {
     foo: function (x) {
-        var a = x['foo']();
+        var a = x['foo']();// should be string 
         return a + x.notHere();
     },
     // BUG 794164
     bar: b.foo(1).notHere()
 };
-var r4 = b.foo(new B());
+var r4 = b.foo(new B());// error after constraints above made illegal, doesn't matter 
diff --git a/tests/baselines/reference/propertyAccessOnTypeParameterWithoutConstraints.js b/tests/baselines/reference/propertyAccessOnTypeParameterWithoutConstraints.js
index 812186a24ba..b9fded8ae06 100644
--- a/tests/baselines/reference/propertyAccessOnTypeParameterWithoutConstraints.js
+++ b/tests/baselines/reference/propertyAccessOnTypeParameterWithoutConstraints.js
@@ -37,7 +37,7 @@ var C = (function () {
     }
     C.prototype.f = function () {
         var x;
-        var a = x['toString']();
+        var a = x['toString']();// should be string 
         return a + x.toString();
     };
     return C;
@@ -51,7 +51,7 @@ var r3 = a().toString();
 var r3b = a()['toString']();
 var b = {
     foo: function (x) {
-        var a = x['toString']();
+        var a = x['toString']();// should be string 
         return a + x.toString();
     }
 };
diff --git a/tests/baselines/reference/propertyAndFunctionWithSameName.js b/tests/baselines/reference/propertyAndFunctionWithSameName.js
index 5b9d159339e..3b80aa355da 100644
--- a/tests/baselines/reference/propertyAndFunctionWithSameName.js
+++ b/tests/baselines/reference/propertyAndFunctionWithSameName.js
@@ -24,6 +24,6 @@ var D = (function () {
     function D() {
     }
     D.prototype.x = function (v) {
-    };
+    };// error 
     return D;
 })();
diff --git a/tests/baselines/reference/propertyIdentityWithPrivacyMismatch.js b/tests/baselines/reference/propertyIdentityWithPrivacyMismatch.js
index 84c13dd1416..f5b08d457a7 100644
--- a/tests/baselines/reference/propertyIdentityWithPrivacyMismatch.js
+++ b/tests/baselines/reference/propertyIdentityWithPrivacyMismatch.js
@@ -31,7 +31,7 @@ var y: Foo2;
 //// [propertyIdentityWithPrivacyMismatch_1.js]
 define(["require", "exports"], function (require, exports) {
     var x;
-    var x;
+    var x;// Should be error (mod1.Foo !== mod2.Foo) 
     var Foo1 = (function () {
         function Foo1() {
         }
diff --git a/tests/baselines/reference/propertyNamesWithStringLiteral.js b/tests/baselines/reference/propertyNamesWithStringLiteral.js
index 3b22a44eddb..2f3def6116a 100644
--- a/tests/baselines/reference/propertyNamesWithStringLiteral.js
+++ b/tests/baselines/reference/propertyNamesWithStringLiteral.js
@@ -27,5 +27,5 @@ var Color;
     Color.namedColors;
 })(Color || (Color = {}));
 var a = Color.namedColors["azure"];
-var a = Color.namedColors.blue;
-var a = Color.namedColors["pale blue"];
+var a = Color.namedColors.blue;// Should not error 
+var a = Color.namedColors["pale blue"];// should not error 
diff --git a/tests/baselines/reference/propertyOrdering.js b/tests/baselines/reference/propertyOrdering.js
index 0bd71306382..ad844fcf54f 100644
--- a/tests/baselines/reference/propertyOrdering.js
+++ b/tests/baselines/reference/propertyOrdering.js
@@ -26,14 +26,14 @@ class Bar {
 //// [propertyOrdering.js]
 var Foo = (function () {
     function Foo(store) {
-        this._store = store;
+        this._store = store;// no repro if this is first line in class body 
     }
     Foo.prototype.foo = function () {
         return this._store.length;
     };
     Foo.prototype.bar = function () {
         return this.store;
-    };
+    };// should be an error 
     return Foo;
 })();
 var Bar = (function () {
diff --git a/tests/baselines/reference/propertyParameterWithQuestionMark.js b/tests/baselines/reference/propertyParameterWithQuestionMark.js
index 626f740d5cd..09f098123b0 100644
--- a/tests/baselines/reference/propertyParameterWithQuestionMark.js
+++ b/tests/baselines/reference/propertyParameterWithQuestionMark.js
@@ -17,7 +17,7 @@ var C = (function () {
     return C;
 })();
 // x should not be an optional property
-var v = {};
+var v = {};// Should fail 
 var v2;
 v = v2;
-var v3 = new C;
+var v3 = new C;// Should succeed 
diff --git a/tests/baselines/reference/qualifiedModuleLocals.js b/tests/baselines/reference/qualifiedModuleLocals.js
index 9bdfe20d53a..62f3a25327b 100644
--- a/tests/baselines/reference/qualifiedModuleLocals.js
+++ b/tests/baselines/reference/qualifiedModuleLocals.js
@@ -18,6 +18,6 @@ var A;
     function a() {
         A.b();
     }
-    A.a = a;
+    A.a = a;// A.b should be an unresolved symbol error 
 })(A || (A = {}));
 A.a();
diff --git a/tests/baselines/reference/recursiveBaseConstructorCreation1.js b/tests/baselines/reference/recursiveBaseConstructorCreation1.js
index 808d876d019..6bc6eee8633 100644
--- a/tests/baselines/reference/recursiveBaseConstructorCreation1.js
+++ b/tests/baselines/reference/recursiveBaseConstructorCreation1.js
@@ -27,4 +27,4 @@ var C2 = (function (_super) {
     }
     return C2;
 })(C1);
-var x = new C2();
+var x = new C2();// Valid 
diff --git a/tests/baselines/reference/recursiveBaseConstructorCreation2.js b/tests/baselines/reference/recursiveBaseConstructorCreation2.js
index 465b87d80e5..6b9d35f4592 100644
--- a/tests/baselines/reference/recursiveBaseConstructorCreation2.js
+++ b/tests/baselines/reference/recursiveBaseConstructorCreation2.js
@@ -15,4 +15,4 @@ var bar = new xyz(); // Error: Invalid 'new' expression.
 
 
 //// [recursiveBaseConstructorCreation2.js]
-var bar = new xyz();
+var bar = new xyz();// Error: Invalid 'new' expression. 
diff --git a/tests/baselines/reference/recursiveBaseConstructorCreation3.js b/tests/baselines/reference/recursiveBaseConstructorCreation3.js
index 11f03fa7f12..fb4ea460f0e 100644
--- a/tests/baselines/reference/recursiveBaseConstructorCreation3.js
+++ b/tests/baselines/reference/recursiveBaseConstructorCreation3.js
@@ -11,5 +11,5 @@ var bar = new xyz(); // Error: Invalid 'new' expression.
 var r: xyz = bar.foo;
 
 //// [recursiveBaseConstructorCreation3.js]
-var bar = new xyz();
+var bar = new xyz();// Error: Invalid 'new' expression. 
 var r = bar.foo;
diff --git a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType1.js b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType1.js
index 9266faa3979..0ff8d71997a 100644
--- a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType1.js
+++ b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType1.js
@@ -27,5 +27,5 @@ define(["require", "exports"], function (require, exports) {
 });
 //// [recursiveExportAssignmentAndFindAliasedType1_moduleA.js]
 define(["require", "exports"], function (require, exports) {
-    exports.b;
+    exports.b;// This should result in type ClassB 
 });
diff --git a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType2.js b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType2.js
index 644c5924970..98cde7379f9 100644
--- a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType2.js
+++ b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType2.js
@@ -31,5 +31,5 @@ define(["require", "exports"], function (require, exports) {
 });
 //// [recursiveExportAssignmentAndFindAliasedType2_moduleA.js]
 define(["require", "exports"], function (require, exports) {
-    exports.b;
+    exports.b;// This should result in type ClassB 
 });
diff --git a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType3.js b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType3.js
index 61a68e8321a..cbc99cc6da7 100644
--- a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType3.js
+++ b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType3.js
@@ -35,5 +35,5 @@ define(["require", "exports"], function (require, exports) {
 });
 //// [recursiveExportAssignmentAndFindAliasedType3_moduleA.js]
 define(["require", "exports"], function (require, exports) {
-    exports.b;
+    exports.b;// This should result in type ClassB 
 });
diff --git a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType4.js b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType4.js
index 3c600641d0f..924ea769c9c 100644
--- a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType4.js
+++ b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType4.js
@@ -28,5 +28,5 @@ define(["require", "exports"], function (require, exports) {
 });
 //// [recursiveExportAssignmentAndFindAliasedType4_moduleA.js]
 define(["require", "exports"], function (require, exports) {
-    exports.b;
+    exports.b;// This should result in type ClassB 
 });
diff --git a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType5.js b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType5.js
index 9d40dfc38e8..65b6a3e72d0 100644
--- a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType5.js
+++ b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType5.js
@@ -36,5 +36,5 @@ define(["require", "exports"], function (require, exports) {
 });
 //// [recursiveExportAssignmentAndFindAliasedType5_moduleA.js]
 define(["require", "exports"], function (require, exports) {
-    exports.b;
+    exports.b;// This should result in type ClassB 
 });
diff --git a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType6.js b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType6.js
index 302c331c7e2..e5f6e384845 100644
--- a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType6.js
+++ b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType6.js
@@ -44,5 +44,5 @@ define(["require", "exports"], function (require, exports) {
 });
 //// [recursiveExportAssignmentAndFindAliasedType6_moduleA.js]
 define(["require", "exports"], function (require, exports) {
-    exports.b;
+    exports.b;// This should result in type ClassB 
 });
diff --git a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType7.js b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType7.js
index a14aebe032e..6070865a928 100644
--- a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType7.js
+++ b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType7.js
@@ -46,5 +46,5 @@ define(["require", "exports"], function (require, exports) {
 });
 //// [recursiveExportAssignmentAndFindAliasedType7_moduleA.js]
 define(["require", "exports"], function (require, exports) {
-    exports.b;
+    exports.b;// This should result in type ClassB 
 });
diff --git a/tests/baselines/reference/recursiveFunctionTypes.js b/tests/baselines/reference/recursiveFunctionTypes.js
index 5c3fbeb5579..94b63527e26 100644
--- a/tests/baselines/reference/recursiveFunctionTypes.js
+++ b/tests/baselines/reference/recursiveFunctionTypes.js
@@ -48,8 +48,8 @@ f7(); // ok
 function fn() {
     return 1;
 }
-var x = fn;
-var y = fn;
+var x = fn;// error 
+var y = fn;// ok 
 var f;
 var g;
 function f1(d) {
@@ -61,7 +61,7 @@ function g2() {
 function f3() {
     return f3;
 }
-var a = f3;
+var a = f3;// error 
 var C = (function () {
     function C() {
     }
diff --git a/tests/baselines/reference/recursiveIdenticalAssignment.js b/tests/baselines/reference/recursiveIdenticalAssignment.js
index 31987aa7866..5520052c02b 100644
--- a/tests/baselines/reference/recursiveIdenticalAssignment.js
+++ b/tests/baselines/reference/recursiveIdenticalAssignment.js
@@ -13,4 +13,4 @@ var b: B<B<any>> = a // Error, any does not satisfy constraint B<B<T>>
 
 //// [recursiveIdenticalAssignment.js]
 var a;
-var b = a;
+var b = a// Error, any does not satisfy constraint B<B<T>> ;// Error, any does not satisfy constraint B<B<T>> 
diff --git a/tests/baselines/reference/recursiveInitializer.js b/tests/baselines/reference/recursiveInitializer.js
index 9afe964b457..e8c0748541f 100644
--- a/tests/baselines/reference/recursiveInitializer.js
+++ b/tests/baselines/reference/recursiveInitializer.js
@@ -32,7 +32,7 @@ var s4 = '' + s4;
 // boolean unless otherwise specified
 var b1 = !b1;
 var b2 = !!b2;
-var b3 = !b3 || b3;
-var b4 = (!b4) && b4;
+var b3 = !b3 || b3;// expected boolean here. actually 'any' 
+var b4 = (!b4) && b4;// expected boolean here. actually 'any' 
 // (x:string) => any
 var f = function (x) { return f(x); };
diff --git a/tests/baselines/reference/recursiveTypeInGenericConstraint.js b/tests/baselines/reference/recursiveTypeInGenericConstraint.js
index 7f4e9845b95..341297a549b 100644
--- a/tests/baselines/reference/recursiveTypeInGenericConstraint.js
+++ b/tests/baselines/reference/recursiveTypeInGenericConstraint.js
@@ -29,4 +29,4 @@ var D = (function () {
     }
     return D;
 })();
-var c1 = new Foo();
+var c1 = new Foo();// ok, circularity in assignment compat check causes success 
diff --git a/tests/baselines/reference/returnStatements.js b/tests/baselines/reference/returnStatements.js
index 2ea93c38e98..d38c7d6211f 100644
--- a/tests/baselines/reference/returnStatements.js
+++ b/tests/baselines/reference/returnStatements.js
@@ -55,7 +55,7 @@ function fn7() {
 }
 function fn8() {
     return;
-}
+}// OK, eq. to 'return undefined' 
 var C = (function () {
     function C() {
     }
diff --git a/tests/baselines/reference/returnTypeParameter.js b/tests/baselines/reference/returnTypeParameter.js
index 21df0144a85..2207788161c 100644
--- a/tests/baselines/reference/returnTypeParameter.js
+++ b/tests/baselines/reference/returnTypeParameter.js
@@ -4,7 +4,7 @@ function f2<T>(a: T): T { return T; } // bug was that this satisfied the return
 
 //// [returnTypeParameter.js]
 function f(a) {
-}
+}// error, no return statement 
 function f2(a) {
     return T;
-}
+}// bug was that this satisfied the return statement requirement 
diff --git a/tests/baselines/reference/scopingInCatchBlocks.js b/tests/baselines/reference/scopingInCatchBlocks.js
index 9067a6b1ffd..08911a65446 100644
--- a/tests/baselines/reference/scopingInCatchBlocks.js
+++ b/tests/baselines/reference/scopingInCatchBlocks.js
@@ -24,4 +24,4 @@ try {
 }
 catch (ex1) {
 }
-var x = ex1;
+var x = ex1;// should error 
diff --git a/tests/baselines/reference/sourceMapValidationClasses.js b/tests/baselines/reference/sourceMapValidationClasses.js
index ce8635c26ab..0f1aeb2fc4b 100644
--- a/tests/baselines/reference/sourceMapValidationClasses.js
+++ b/tests/baselines/reference/sourceMapValidationClasses.js
@@ -60,7 +60,7 @@ var Foo;
             for (var _i = 1; _i < arguments.length; _i++) {
                 restGreetings[_i - 1] = arguments[_i];
             }
-            var greeters = [];
+            var greeters = [];/* inline block comment */ 
             greeters[0] = new Greeter(greeting);
             for (var i = 0; i < restGreetings.length; i++) {
                 greeters.push(new Greeter(restGreetings[i]));
diff --git a/tests/baselines/reference/sourceMapValidationClasses.js.map b/tests/baselines/reference/sourceMapValidationClasses.js.map
index c43b1d9ff22..9a88d17d74c 100644
--- a/tests/baselines/reference/sourceMapValidationClasses.js.map
+++ b/tests/baselines/reference/sourceMapValidationClasses.js.map
@@ -1,2 +1,2 @@
 //// [sourceMapValidationClasses.js.map]
-{"version":3,"file":"sourceMapValidationClasses.js","sourceRoot":"","sources":["sourceMapValidationClasses.ts"],"names":["Foo","Foo.Bar","Foo.Bar.Greeter","Foo.Bar.Greeter.constructor","Foo.Bar.Greeter.greet","Foo.Bar.foo","Foo.Bar.foo2"],"mappings":"AAAA,IAAO,GAAG,CAmCT;AAnCD,WAAO,GAAG;IAACA,WAAAA,GAAGA,EAACA,CAACA;QACZC,YAAYA,CAACA;QAEbA,IAAMA,OAAOA;YACTC,SADEA,OAAOA,CACUA,QAAgBA;gBAAhBC,aAAQA,GAARA,QAAQA,CAAQA;YACnCA,CAACA;YAEDD,uBAAKA,GAALA;gBACIE,MAAMA,CAACA,MAAMA,GAAGA,IAAIA,CAACA,QAAQA,GAAGA,OAAOA,CAACA;YAC5CA,CAACA;YACLF,cAACA;QAADA,CAACA,AAPDD,IAOCA;QAGDA,SAASA,GAAGA,CAACA,QAAgBA;YACzBI,MAAMA,CAACA,IAAIA,OAAOA,CAACA,QAAQA,CAACA,CAACA;QACjCA,CAACA;QAEDJ,IAAIA,OAAOA,GAAGA,IAAIA,OAAOA,CAACA,eAAeA,CAACA,CAACA;QAC3CA,IAAIA,GAAGA,GAAGA,OAAOA,CAACA,KAAKA,EAAEA,CAACA;QAE1BA,SAASA,IAAIA,CAACA,QAAgBA;YAAEK,uBAA8CA;iBAA9CA,WAA8CA,CAA9CA,sBAA8CA,CAA9CA,IAA8CA;gBAA9CA,sCAA8CA;;YAC1EA,IAAIA,QAAQA,GAAcA,EAAEA,CAACA;YAC7BA,QAAQA,CAACA,CAACA,CAACA,GAAGA,IAAIA,OAAOA,CAACA,QAAQA,CAACA,CAACA;YACpCA,GAAGA,CAACA,CAACA,GAAGA,CAACA,CAACA,GAAGA,CAACA,EAAEA,CAACA,GAAGA,aAAaA,CAACA,MAAMA,EAAEA,CAACA,EAAEA,EAAEA,CAACA;gBAC5CA,QAAQA,CAACA,IAAIA,CAACA,IAAIA,OAAOA,CAACA,aAAaA,CAACA,CAACA,CAACA,CAACA,CAACA,CAACA;YACjDA,CAACA;YAEDA,MAAMA,CAACA,QAAQA,CAACA;QACpBA,CAACA;QAEDL,IAAIA,CAACA,GAAGA,IAAIA,CAACA,OAAOA,EAAEA,OAAOA,EAAEA,GAAGA,CAACA,CAACA;QAEpCA,GAAGA,CAACA,CAACA,GAAGA,CAACA,CAACA,GAAGA,CAACA,EAAEA,CAACA,GAAGA,CAACA,CAACA,MAAMA,EAAEA,CAACA,EAAEA,EAAEA,CAACA;YAChCA,CAACA,CAACA,CAACA,CAACA,CAACA,KAAKA,EAAEA,CAACA;QACjBA,CAACA;IACLA,CAACA,EAnCUD,OAAGA,KAAHA,OAAGA,QAmCbA;IAnCUA,IAAAA,GAAGA,GAAHA,OAmCVA,CAAAA;AAADA,CAACA,EAnCM,GAAG,KAAH,GAAG,QAmCT"}
\ No newline at end of file
+{"version":3,"file":"sourceMapValidationClasses.js","sourceRoot":"","sources":["sourceMapValidationClasses.ts"],"names":["Foo","Foo.Bar","Foo.Bar.Greeter","Foo.Bar.Greeter.constructor","Foo.Bar.Greeter.greet","Foo.Bar.foo","Foo.Bar.foo2"],"mappings":"AAAA,IAAO,GAAG,CAmCT;AAnCD,WAAO,GAAG;IAACA,WAAAA,GAAGA,EAACA,CAACA;QACZC,YAAYA,CAACA;QAEbA,IAAMA,OAAOA;YACTC,SADEA,OAAOA,CACUA,QAAgBA;gBAAhBC,aAAQA,GAARA,QAAQA,CAAQA;YACnCA,CAACA;YAEDD,uBAAKA,GAALA;gBACIE,MAAMA,CAACA,MAAMA,GAAGA,IAAIA,CAACA,QAAQA,GAAGA,OAAOA,CAACA;YAC5CA,CAACA;YACLF,cAACA;QAADA,CAACA,AAPDD,IAOCA;QAGDA,SAASA,GAAGA,CAACA,QAAgBA;YACzBI,MAAMA,CAACA,IAAIA,OAAOA,CAACA,QAAQA,CAACA,CAACA;QACjCA,CAACA;QAEDJ,IAAIA,OAAOA,GAAGA,IAAIA,OAAOA,CAACA,eAAeA,CAACA,CAACA;QAC3CA,IAAIA,GAAGA,GAAGA,OAAOA,CAACA,KAAKA,EAAEA,CAACA;QAE1BA,SAASA,IAAIA,CAACA,QAAgBA;YAAEK,uBAA8CA;iBAA9CA,WAA8CA,CAA9CA,sBAA8CA,CAA9CA,IAA8CA;gBAA9CA,sCAA8CA;;YAC1EA,IAAIA,QAAQA,GAAcA,EAAEA,CAAEA,0BAA0BA,CAA3BA;YAC7BA,QAAQA,CAACA,CAACA,CAACA,GAAGA,IAAIA,OAAOA,CAACA,QAAQA,CAACA,CAACA;YACpCA,GAAGA,CAACA,CAACA,GAAGA,CAACA,CAACA,GAAGA,CAACA,EAAEA,CAACA,GAAGA,aAAaA,CAACA,MAAMA,EAAEA,CAACA,EAAEA,EAAEA,CAACA;gBAC5CA,QAAQA,CAACA,IAAIA,CAACA,IAAIA,OAAOA,CAACA,aAAaA,CAACA,CAACA,CAACA,CAACA,CAACA,CAACA;YACjDA,CAACA;YAEDA,MAAMA,CAACA,QAAQA,CAACA;QACpBA,CAACA;QAEDL,IAAIA,CAACA,GAAGA,IAAIA,CAACA,OAAOA,EAAEA,OAAOA,EAAEA,GAAGA,CAACA,CAACA;QAEpCA,GAAGA,CAACA,CAACA,GAAGA,CAACA,CAACA,GAAGA,CAACA,EAAEA,CAACA,GAAGA,CAACA,CAACA,MAAMA,EAAEA,CAACA,EAAEA,EAAEA,CAACA;YAChCA,CAACA,CAACA,CAACA,CAACA,CAACA,KAAKA,EAAEA,CAACA;QACjBA,CAACA;IACLA,CAACA,EAnCUD,OAAGA,KAAHA,OAAGA,QAmCbA;IAnCUA,IAAAA,GAAGA,GAAHA,OAmCVA,CAAAA;AAADA,CAACA,EAnCM,GAAG,KAAH,GAAG,QAmCT"}
\ No newline at end of file
diff --git a/tests/baselines/reference/sourceMapValidationClasses.sourcemap.txt b/tests/baselines/reference/sourceMapValidationClasses.sourcemap.txt
index 3b64907b012..910083a11f4 100644
--- a/tests/baselines/reference/sourceMapValidationClasses.sourcemap.txt
+++ b/tests/baselines/reference/sourceMapValidationClasses.sourcemap.txt
@@ -436,30 +436,35 @@ sourceFile:sourceMapValidationClasses.ts
 2 >Emitted(22, 55) Source(21, 83) + SourceIndex(0) name (Foo.Bar.foo2)
 ---
 >>>            }
->>>            var greeters = [];
+>>>            var greeters = [];/* inline block comment */ 
 1 >^^^^^^^^^^^^
 2 >            ^^^^
 3 >                ^^^^^^^^
 4 >                        ^^^
 5 >                           ^^
 6 >                             ^
-7 >                              ^^^^^^^^^^^^^^^^^^^->
+7 >                              ^^^^^^^^^^^^^^^^^^^^^^^^^^
+8 >                                                        ^
 1 >) {
   >        
 2 >            var 
 3 >                greeters
 4 >                        : Greeter[] = 
 5 >                           []
-6 >                             ;
+6 >                             ; 
+7 >                              /* inline block comment */
+8 >                                                        
 1 >Emitted(24, 13) Source(22, 9) + SourceIndex(0) name (Foo.Bar.foo2)
 2 >Emitted(24, 17) Source(22, 13) + SourceIndex(0) name (Foo.Bar.foo2)
 3 >Emitted(24, 25) Source(22, 21) + SourceIndex(0) name (Foo.Bar.foo2)
 4 >Emitted(24, 28) Source(22, 35) + SourceIndex(0) name (Foo.Bar.foo2)
 5 >Emitted(24, 30) Source(22, 37) + SourceIndex(0) name (Foo.Bar.foo2)
-6 >Emitted(24, 31) Source(22, 38) + SourceIndex(0) name (Foo.Bar.foo2)
+6 >Emitted(24, 31) Source(22, 39) + SourceIndex(0) name (Foo.Bar.foo2)
+7 >Emitted(24, 57) Source(22, 65) + SourceIndex(0) name (Foo.Bar.foo2)
+8 >Emitted(24, 58) Source(22, 38) + SourceIndex(0) name (Foo.Bar.foo2)
 ---
 >>>            greeters[0] = new Greeter(greeting);
-1->^^^^^^^^^^^^
+1 >^^^^^^^^^^^^
 2 >            ^^^^^^^^
 3 >                    ^
 4 >                     ^
@@ -472,7 +477,7 @@ sourceFile:sourceMapValidationClasses.ts
 11>                                              ^
 12>                                               ^
 13>                                                ^^^^^^^^^^^^^->
-1-> /* inline block comment */
+1 > /* inline block comment */
   >        
 2 >            greeters
 3 >                    [
@@ -485,7 +490,7 @@ sourceFile:sourceMapValidationClasses.ts
 10>                                      greeting
 11>                                              )
 12>                                               ;
-1->Emitted(25, 13) Source(23, 9) + SourceIndex(0) name (Foo.Bar.foo2)
+1 >Emitted(25, 13) Source(23, 9) + SourceIndex(0) name (Foo.Bar.foo2)
 2 >Emitted(25, 21) Source(23, 17) + SourceIndex(0) name (Foo.Bar.foo2)
 3 >Emitted(25, 22) Source(23, 18) + SourceIndex(0) name (Foo.Bar.foo2)
 4 >Emitted(25, 23) Source(23, 19) + SourceIndex(0) name (Foo.Bar.foo2)
diff --git a/tests/baselines/reference/specializedInheritedConstructors1.js b/tests/baselines/reference/specializedInheritedConstructors1.js
index d20793629a2..d65230a4654 100644
--- a/tests/baselines/reference/specializedInheritedConstructors1.js
+++ b/tests/baselines/reference/specializedInheritedConstructors1.js
@@ -44,4 +44,4 @@ var MyView = (function (_super) {
 var m = { model: new Model() };
 var aView = new View({ model: new Model() });
 var aView2 = new View(m);
-var myView = new MyView(m);
+var myView = new MyView(m);// was error 
diff --git a/tests/baselines/reference/staticInheritance.js b/tests/baselines/reference/staticInheritance.js
index a73c0747499..aacdb95641c 100644
--- a/tests/baselines/reference/staticInheritance.js
+++ b/tests/baselines/reference/staticInheritance.js
@@ -22,7 +22,7 @@ function doThing(x) {
 }
 var A = (function () {
     function A() {
-        this.p = doThing(A);
+        this.p = doThing(A);// OK 
     }
     return A;
 })();
@@ -30,8 +30,8 @@ var B = (function (_super) {
     __extends(B, _super);
     function B() {
         _super.apply(this, arguments);
-        this.p1 = doThing(A);
-        this.p2 = doThing(B);
+        this.p1 = doThing(A);// OK 
+        this.p2 = doThing(B);// OK 
     }
     return B;
 })(A);
diff --git a/tests/baselines/reference/staticMemberAssignsToConstructorFunctionMembers.js b/tests/baselines/reference/staticMemberAssignsToConstructorFunctionMembers.js
index 7f06aa0b9f1..bae1e6c189f 100644
--- a/tests/baselines/reference/staticMemberAssignsToConstructorFunctionMembers.js
+++ b/tests/baselines/reference/staticMemberAssignsToConstructorFunctionMembers.js
@@ -22,7 +22,7 @@ var C = (function () {
     };
     C.bar = function (x) {
         C.bar = function () {
-        };
+        }// error ;
         C.bar = function (x) { return x; };
         C.bar = function (x) { return 1; };
         return 1;
diff --git a/tests/baselines/reference/staticMemberExportAccess.js b/tests/baselines/reference/staticMemberExportAccess.js
index 5c3700bcf41..d8d0271756d 100644
--- a/tests/baselines/reference/staticMemberExportAccess.js
+++ b/tests/baselines/reference/staticMemberExportAccess.js
@@ -37,9 +37,9 @@ var Sammy;
     Sammy.x = 1;
 })(Sammy || (Sammy = {}));
 var $;
-var instanceOfClassSammy = new $.sammy();
-var r1 = instanceOfClassSammy.foo();
+var instanceOfClassSammy = new $.sammy();// should be error 
+var r1 = instanceOfClassSammy.foo();// r1 is string 
 var r2 = $.sammy.foo();
-var r3 = $.sammy.bar();
-var r4 = $.sammy.x;
+var r3 = $.sammy.bar();// error 
+var r4 = $.sammy.x;// error 
 Sammy.bar();
diff --git a/tests/baselines/reference/staticMemberOfClassAndPublicMemberOfAnotherClassAssignment.js b/tests/baselines/reference/staticMemberOfClassAndPublicMemberOfAnotherClassAssignment.js
index 85e575f74a9..7e851286ae5 100644
--- a/tests/baselines/reference/staticMemberOfClassAndPublicMemberOfAnotherClassAssignment.js
+++ b/tests/baselines/reference/staticMemberOfClassAndPublicMemberOfAnotherClassAssignment.js
@@ -44,7 +44,7 @@ var a = new B();
 a = new C();
 a = B;
 a = C;
-var b = new C();
+var b = new C();// error name is missing 
 b = B;
 b = C;
 b = a;
diff --git a/tests/baselines/reference/staticMethodReferencingTypeArgument1.js b/tests/baselines/reference/staticMethodReferencingTypeArgument1.js
index e9ff32877ad..b2e84abcc5b 100644
--- a/tests/baselines/reference/staticMethodReferencingTypeArgument1.js
+++ b/tests/baselines/reference/staticMethodReferencingTypeArgument1.js
@@ -25,7 +25,7 @@ var Editor;
             this.data = data;
         }
         List.MakeHead = function () {
-            var entry = new List(true, null);
+            var entry = new List(true, null);// can't access T here 
             entry.prev = entry;
             entry.next = entry;
             return entry;
diff --git a/tests/baselines/reference/staticPropSuper.js b/tests/baselines/reference/staticPropSuper.js
index b1fc30e9387..3f248e2e363 100644
--- a/tests/baselines/reference/staticPropSuper.js
+++ b/tests/baselines/reference/staticPropSuper.js
@@ -50,7 +50,7 @@ var A = (function () {
 var B = (function (_super) {
     __extends(B, _super);
     function B() {
-        var x = 1;
+        var x = 1;// should not error 
         _super.call(this);
     }
     B.s = 9;
@@ -60,7 +60,7 @@ var C = (function (_super) {
     __extends(C, _super);
     function C() {
         this.p = 10;
-        var x = 1;
+        var x = 1;// should error 
     }
     return C;
 })(A);
@@ -68,7 +68,7 @@ var D = (function (_super) {
     __extends(D, _super);
     function D() {
         this.p = 11;
-        var x = 1;
+        var x = 1;// should error 
     }
     return D;
 })(A);
@@ -76,7 +76,7 @@ var E = (function (_super) {
     __extends(E, _super);
     function E() {
         this.p = 12;
-        var x = 1;
+        var x = 1;// should error 
     }
     return E;
 })(A);
diff --git a/tests/baselines/reference/staticsNotInScopeInClodule.js b/tests/baselines/reference/staticsNotInScopeInClodule.js
index 63c8ee16f66..922e1927345 100644
--- a/tests/baselines/reference/staticsNotInScopeInClodule.js
+++ b/tests/baselines/reference/staticsNotInScopeInClodule.js
@@ -16,5 +16,5 @@ var Clod = (function () {
 })();
 var Clod;
 (function (Clod) {
-    var p = x;
+    var p = x;// x isn't in scope here 
 })(Clod || (Clod = {}));
diff --git a/tests/baselines/reference/strictModeInConstructor.js b/tests/baselines/reference/strictModeInConstructor.js
index 2128cbfc173..b017b05e45d 100644
--- a/tests/baselines/reference/strictModeInConstructor.js
+++ b/tests/baselines/reference/strictModeInConstructor.js
@@ -94,7 +94,7 @@ var D = (function (_super) {
     __extends(D, _super);
     function D() {
         this.s = 9;
-        var x = 1;
+        var x = 1;// Error 
         _super.call(this);
         "use strict";
     }
@@ -121,7 +121,7 @@ var Cs = (function (_super) {
 var Ds = (function (_super) {
     __extends(Ds, _super);
     function Ds() {
-        var x = 1;
+        var x = 1;// no Error 
         _super.call(this);
         "use strict";
     }
diff --git a/tests/baselines/reference/stringPropertyAccessWithError.js b/tests/baselines/reference/stringPropertyAccessWithError.js
index 3b507ceb7f9..b80813da6f9 100644
--- a/tests/baselines/reference/stringPropertyAccessWithError.js
+++ b/tests/baselines/reference/stringPropertyAccessWithError.js
@@ -4,4 +4,4 @@ var d = x['charAt']('invalid'); // error
 
 //// [stringPropertyAccessWithError.js]
 var x = '';
-var d = x['charAt']('invalid');
+var d = x['charAt']('invalid');// error 
diff --git a/tests/baselines/reference/subtypesOfTypeParameter.js b/tests/baselines/reference/subtypesOfTypeParameter.js
index c38b281f5ef..8c053bcaeed 100644
--- a/tests/baselines/reference/subtypesOfTypeParameter.js
+++ b/tests/baselines/reference/subtypesOfTypeParameter.js
@@ -126,8 +126,8 @@ var D1 = (function (_super) {
     return D1;
 })(C3);
 function f1(x, y) {
-    var r = true ? x : y;
-    var r = true ? y : x;
+    var r = true ? x : y;// error 
+    var r = true ? y : x;// error 
 }
 var C1 = (function () {
     function C1() {
@@ -186,7 +186,7 @@ function f2(x, y) {
     } : x;
     var r8b = true ? x : function (x) {
         return x;
-    };
+    };// type parameters not identical across declarations 
     var i1;
     var r9 = true ? i1 : x;
     var r9 = true ? x : i1;
@@ -214,8 +214,8 @@ function f2(x, y) {
         var r18 = true ? x : a;
         var r18 = true ? a : x;
     }
-    var r19 = true ? new Object() : x;
-    var r19 = true ? x : new Object();
-    var r20 = true ? {} : x;
-    var r20 = true ? x : {};
+    var r19 = true ? new Object() : x;// BCT is Object 
+    var r19 = true ? x : new Object();// BCT is Object 
+    var r20 = true ? {} : x;// ok 
+    var r20 = true ? x : {};// ok 
 }
diff --git a/tests/baselines/reference/subtypesOfTypeParameterWithConstraints2.js b/tests/baselines/reference/subtypesOfTypeParameterWithConstraints2.js
index 66f00386d72..8516f275089 100644
--- a/tests/baselines/reference/subtypesOfTypeParameterWithConstraints2.js
+++ b/tests/baselines/reference/subtypesOfTypeParameterWithConstraints2.js
@@ -215,96 +215,96 @@ var c;
     c.bar = 1;
 })(c || (c = {}));
 function f4(x) {
-    var r0 = true ? x : null;
-    var r0 = true ? null : x;
+    var r0 = true ? x : null;// ok 
+    var r0 = true ? null : x;// ok 
     var u;
-    var r0b = true ? u : x;
-    var r0b = true ? x : u;
+    var r0b = true ? u : x;// ok 
+    var r0b = true ? x : u;// ok 
 }
 function f5(x) {
-    var r1 = true ? 1 : x;
-    var r1 = true ? x : 1;
+    var r1 = true ? 1 : x;// error 
+    var r1 = true ? x : 1;// error 
 }
 function f6(x) {
-    var r2 = true ? '' : x;
-    var r2 = true ? x : '';
+    var r2 = true ? '' : x;// error 
+    var r2 = true ? x : '';// error 
 }
 function f7(x) {
-    var r3 = true ? true : x;
-    var r3 = true ? x : true;
+    var r3 = true ? true : x;// error 
+    var r3 = true ? x : true;// error 
 }
 function f8(x) {
-    var r4 = true ? new Date() : x;
-    var r4 = true ? x : new Date();
+    var r4 = true ? new Date() : x;// ok 
+    var r4 = true ? x : new Date();// ok 
 }
 function f9(x) {
-    var r5 = true ? /1/ : x;
-    var r5 = true ? x : /1/;
+    var r5 = true ? /1/ : x;// ok 
+    var r5 = true ? x : /1/;// ok 
 }
 function f10(x) {
-    var r6 = true ? { foo: 1 } : x;
-    var r6 = true ? x : { foo: 1 };
+    var r6 = true ? { foo: 1 } : x;// ok 
+    var r6 = true ? x : { foo: 1 };// ok 
 }
 function f11(x) {
     var r7 = true ? function () {
-    } : x;
+    } : x;// ok 
     var r7 = true ? x : function () {
-    };
+    };// ok 
 }
 function f12(x) {
     var r8 = true ? function (x) {
         return x;
-    } : x;
+    } : x;// ok 
     var r8b = true ? x : function (x) {
         return x;
-    };
+    };// ok, type parameters not identical across declarations 
 }
 function f13(x) {
     var i1;
-    var r9 = true ? i1 : x;
-    var r9 = true ? x : i1;
+    var r9 = true ? i1 : x;// ok 
+    var r9 = true ? x : i1;// ok 
 }
 function f14(x) {
     var c1;
-    var r10 = true ? c1 : x;
-    var r10 = true ? x : c1;
+    var r10 = true ? c1 : x;// ok 
+    var r10 = true ? x : c1;// ok 
 }
 function f15(x) {
     var c2;
-    var r12 = true ? c2 : x;
-    var r12 = true ? x : c2;
+    var r12 = true ? c2 : x;// ok 
+    var r12 = true ? x : c2;// ok 
 }
 function f16(x) {
-    var r13 = true ? E : x;
-    var r13 = true ? x : E;
-    var r14 = true ? 0 /* A */ : x;
-    var r14 = true ? x : 0 /* A */;
+    var r13 = true ? E : x;// BUG 831833 
+    var r13 = true ? x : E;// BUG 831833 
+    var r14 = true ? 0 /* A */ : x;// BUG 831833 
+    var r14 = true ? x : 0 /* A */;// BUG 831833 
 }
 function f17(x) {
     var af;
-    var r15 = true ? af : x;
-    var r15 = true ? x : af;
+    var r15 = true ? af : x;// ok 
+    var r15 = true ? x : af;// ok 
 }
 function f18(x) {
     var ac;
-    var r16 = true ? ac : x;
-    var r16 = true ? x : ac;
+    var r16 = true ? ac : x;// ok 
+    var r16 = true ? x : ac;// ok 
 }
 function f19(x) {
     function f17(a) {
-        var r17 = true ? x : a;
-        var r17 = true ? a : x;
+        var r17 = true ? x : a;// ok 
+        var r17 = true ? a : x;// ok 
     }
     function f18(a) {
-        var r18 = true ? x : a;
-        var r18 = true ? a : x;
+        var r18 = true ? x : a;// ok 
+        var r18 = true ? a : x;// ok 
     }
 }
 function f20(x) {
-    var r19 = true ? new Object() : x;
-    var r19 = true ? x : new Object();
+    var r19 = true ? new Object() : x;// ok 
+    var r19 = true ? x : new Object();// ok 
 }
 function f21(x) {
-    var r20 = true ? {} : x;
-    var r20 = true ? x : {};
+    var r20 = true ? {} : x;// ok 
+    var r20 = true ? x : {};// ok 
 }
diff --git a/tests/baselines/reference/subtypingWithCallSignatures.js b/tests/baselines/reference/subtypingWithCallSignatures.js
index 47bb32fcb2c..615c36665ab 100644
--- a/tests/baselines/reference/subtypingWithCallSignatures.js
+++ b/tests/baselines/reference/subtypingWithCallSignatures.js
@@ -14,8 +14,8 @@ module CallSignature {
 //// [subtypingWithCallSignatures.js]
 var CallSignature;
 (function (CallSignature) {
-    var r = foo1(function (x) { return 1; });
-    var r2 = foo1(function (x) { return ''; });
-    var r3 = foo2(function (x, y) { return 1; });
-    var r4 = foo2(function (x) { return ''; });
+    var r = foo1(function (x) { return 1; });// ok because base returns void 
+    var r2 = foo1(function (x) { return ''; });// ok because base returns void 
+    var r3 = foo2(function (x, y) { return 1; });// ok because base returns void 
+    var r4 = foo2(function (x) { return ''; });// ok because base returns void 
 })(CallSignature || (CallSignature = {}));
diff --git a/tests/baselines/reference/subtypingWithCallSignatures2.js b/tests/baselines/reference/subtypingWithCallSignatures2.js
index 5d838be70aa..e566a884684 100644
--- a/tests/baselines/reference/subtypingWithCallSignatures2.js
+++ b/tests/baselines/reference/subtypingWithCallSignatures2.js
@@ -208,9 +208,9 @@ var OtherDerived = (function (_super) {
 })(Base);
 var r1arg1 = function (x) { return [x]; };
 var r1arg2 = function (x) { return [1]; };
-var r1 = foo1(r1arg1);
-var r1a = [r1arg2, r1arg1];
-var r1b = [r1arg1, r1arg2];
+var r1 = foo1(r1arg1);// any, return types are not subtype of first overload 
+var r1a = [r1arg2, r1arg1];// generic signature, subtype in both directions 
+var r1b = [r1arg1, r1arg2];// generic signature, subtype in both directions 
 var r2arg1 = function (x) { return ['']; };
 var r2arg2 = function (x) { return ['']; };
 var r2 = foo2(r2arg1);
@@ -224,32 +224,32 @@ var r3a = [r3arg1, r3arg2];
 var r3b = [r3arg2, r3arg1];
 var r4arg1 = function (x, y) { return x; };
 var r4arg2 = function (x, y) { return ''; };
-var r4 = foo4(r4arg1);
+var r4 = foo4(r4arg1);// any 
 var r4a = [r4arg1, r4arg2];
 var r4b = [r4arg2, r4arg1];
 var r5arg1 = function (x) { return null; };
 var r5arg2 = function (x) { return ''; };
-var r5 = foo5(r5arg1);
+var r5 = foo5(r5arg1);// any 
 var r5a = [r5arg1, r5arg2];
 var r5b = [r5arg2, r5arg1];
 var r6arg1 = function (x) { return null; };
 var r6arg2 = function (x) { return null; };
-var r6 = foo6(r6arg1);
+var r6 = foo6(r6arg1);// any 
 var r6a = [r6arg1, r6arg2];
 var r6b = [r6arg2, r6arg1];
 var r7arg1 = function (x) { return function (r) { return null; }; };
 var r7arg2 = function (x) { return function (r) { return null; }; };
-var r7 = foo7(r7arg1);
+var r7 = foo7(r7arg1);// any 
 var r7a = [r7arg1, r7arg2];
 var r7b = [r7arg2, r7arg1];
 var r8arg1 = function (x, y) { return function (r) { return null; }; };
 var r8arg2 = function (x, y) { return function (r) { return null; }; };
-var r8 = foo8(r8arg1);
+var r8 = foo8(r8arg1);// any 
 var r8a = [r8arg1, r8arg2];
 var r8b = [r8arg2, r8arg1];
 var r9arg1 = function (x, y) { return function (r) { return null; }; };
 var r9arg2 = function (x, y) { return function (r) { return null; }; };
-var r9 = foo9(r9arg1);
+var r9 = foo9(r9arg1);// any 
 var r9a = [r9arg1, r9arg2];
 var r9b = [r9arg2, r9arg1];
 var r10arg1 = function () {
@@ -266,34 +266,34 @@ var r10arg2 = function () {
     }
     return null;
 };
-var r10 = foo10(r10arg1);
+var r10 = foo10(r10arg1);// any 
 var r10a = [r10arg1, r10arg2];
 var r10b = [r10arg2, r10arg1];
 var r11arg1 = function (x, y) { return x; };
 var r11arg2 = function (x, y) { return null; };
-var r11 = foo11(r11arg1);
+var r11 = foo11(r11arg1);// any 
 var r11a = [r11arg1, r11arg2];
 var r11b = [r11arg2, r11arg1];
 var r12arg1 = function (x, y) { return null; };
 var r12arg2 = function (x, y) { return null; };
-var r12 = foo12(r12arg1);
+var r12 = foo12(r12arg1);// any 
 var r12a = [r12arg1, r12arg2];
 var r12b = [r12arg2, r12arg1];
 var r13arg1 = function (x, y) { return y; };
 var r13arg2 = function (x, y) { return null; };
-var r13 = foo13(r13arg1);
+var r13 = foo13(r13arg1);// any 
 var r13a = [r13arg1, r13arg2];
 var r13b = [r13arg2, r13arg1];
 var r14arg1 = function (x) { return x.a; };
 var r14arg2 = function (x) { return null; };
-var r14 = foo14(r14arg1);
+var r14 = foo14(r14arg1);// any 
 var r14a = [r14arg1, r14arg2];
 var r14b = [r14arg2, r14arg1];
 var r15arg1 = function (x) { return null; };
-var r15 = foo15(r15arg1);
+var r15 = foo15(r15arg1);// any 
 var r16arg1 = function (x) { return [1]; };
 var r16 = foo16(r16arg1);
 var r17arg1 = function (x) { return null; };
-var r17 = foo17(r17arg1);
+var r17 = foo17(r17arg1);// any 
 var r18arg1 = function (x) { return null; };
 var r18 = foo18(r18arg1);
diff --git a/tests/baselines/reference/subtypingWithCallSignatures3.js b/tests/baselines/reference/subtypingWithCallSignatures3.js
index da4c2cf4ec2..f1c2277b593 100644
--- a/tests/baselines/reference/subtypingWithCallSignatures3.js
+++ b/tests/baselines/reference/subtypingWithCallSignatures3.js
@@ -155,17 +155,17 @@ var Errors;
         }
         return OtherDerived;
     })(Base);
-    var r1 = foo2(function (x) { return null; });
+    var r1 = foo2(function (x) { return null; });// any 
     var r1a = [function (x) { return ['']; }, function (x) { return null; }];
     var r1b = [function (x) { return null; }, function (x) { return ['']; }];
     var r2arg = function (x) { return function (r) { return null; }; };
     var r2arg2 = function (x) { return function (r) { return null; }; };
-    var r2 = foo7(r2arg);
+    var r2 = foo7(r2arg);// any 
     var r2a = [r2arg2, r2arg];
     var r2b = [r2arg, r2arg2];
     var r3arg = function (x, y) { return function (r) { return null; }; };
     var r3arg2 = function (x, y) { return function (r) { return null; }; };
-    var r3 = foo8(r3arg);
+    var r3 = foo8(r3arg);// any 
     var r3a = [r3arg2, r3arg];
     var r3b = [r3arg, r3arg2];
     var r4arg = function () {
@@ -182,37 +182,37 @@ var Errors;
         }
         return null;
     };
-    var r4 = foo10(r4arg);
+    var r4 = foo10(r4arg);// any 
     var r4a = [r4arg2, r4arg];
     var r4b = [r4arg, r4arg2];
     var r5arg = function (x, y) { return null; };
     var r5arg2 = function (x, y) { return null; };
-    var r5 = foo11(r5arg);
+    var r5 = foo11(r5arg);// any 
     var r5a = [r5arg2, r5arg];
     var r5b = [r5arg, r5arg2];
     var r6arg = function (x, y) { return null; };
     var r6arg2 = function (x, y) { return null; };
-    var r6 = foo12(r6arg);
+    var r6 = foo12(r6arg);// (x: Array<Base>, y: Array<Derived2>) => Array<Derived> 
     var r6a = [r6arg2, r6arg];
     var r6b = [r6arg, r6arg2];
     var r7arg = function (x) { return null; };
     var r7arg2 = function (x) { return 1; };
-    var r7 = foo15(r7arg);
+    var r7 = foo15(r7arg);// any 
     var r7a = [r7arg2, r7arg];
     var r7b = [r7arg, r7arg2];
     var r7arg3 = function (x) { return 1; };
-    var r7c = foo15(r7arg3);
+    var r7c = foo15(r7arg3);// (x: { a: string; b: number }) => number): number; 
     var r7d = [r7arg2, r7arg3];
     var r7e = [r7arg3, r7arg2];
     var r8arg = function (x) { return null; };
-    var r8 = foo16(r8arg);
+    var r8 = foo16(r8arg);// any 
     var r9arg = function (x) { return null; };
-    var r9 = foo17(r9arg);
+    var r9 = foo17(r9arg);// (x: { <T extends Derived >(a: T): T; <T extends Base >(a: T): T; }): any[]; (x: { <T extends Derived2>(a: T): T; <T extends Base>(a: T): T; }): any[]; 
 })(Errors || (Errors = {}));
 var WithGenericSignaturesInBaseType;
 (function (WithGenericSignaturesInBaseType) {
     var r2arg2 = function (x) { return ['']; };
-    var r2 = foo2(r2arg2);
+    var r2 = foo2(r2arg2);// <T>(x:T) => T[] since we can infer from generic signatures now 
     var r3arg2 = function (x) { return null; };
-    var r3 = foo3(r3arg2);
+    var r3 = foo3(r3arg2);// any 
 })(WithGenericSignaturesInBaseType || (WithGenericSignaturesInBaseType = {}));
diff --git a/tests/baselines/reference/subtypingWithCallSignaturesA.js b/tests/baselines/reference/subtypingWithCallSignaturesA.js
index 83ae6274847..1152a59c21a 100644
--- a/tests/baselines/reference/subtypingWithCallSignaturesA.js
+++ b/tests/baselines/reference/subtypingWithCallSignaturesA.js
@@ -3,4 +3,4 @@ declare function foo3(cb: (x: number) => number): typeof cb;
 var r5 = foo3((x: number) => ''); // error
 
 //// [subtypingWithCallSignaturesA.js]
-var r5 = foo3(function (x) { return ''; });
+var r5 = foo3(function (x) { return ''; });// error 
diff --git a/tests/baselines/reference/subtypingWithConstructSignatures.js b/tests/baselines/reference/subtypingWithConstructSignatures.js
index 043a0ae15f6..f222e1b24bc 100644
--- a/tests/baselines/reference/subtypingWithConstructSignatures.js
+++ b/tests/baselines/reference/subtypingWithConstructSignatures.js
@@ -19,11 +19,11 @@ module ConstructSignature {
 var ConstructSignature;
 (function (ConstructSignature) {
     var rarg1;
-    var r = foo1(rarg1);
+    var r = foo1(rarg1);// ok because base returns void 
     var rarg2;
-    var r2 = foo1(rarg2);
+    var r2 = foo1(rarg2);// ok because base returns void 
     var r3arg1;
-    var r3 = foo2(r3arg1);
+    var r3 = foo2(r3arg1);// ok because base returns void 
     var r4arg1;
-    var r4 = foo2(r4arg1);
+    var r4 = foo2(r4arg1);// ok because base returns void 
 })(ConstructSignature || (ConstructSignature = {}));
diff --git a/tests/baselines/reference/subtypingWithConstructSignatures2.js b/tests/baselines/reference/subtypingWithConstructSignatures2.js
index c42bbcd606b..47fd8ce11ce 100644
--- a/tests/baselines/reference/subtypingWithConstructSignatures2.js
+++ b/tests/baselines/reference/subtypingWithConstructSignatures2.js
@@ -208,9 +208,9 @@ var OtherDerived = (function (_super) {
 })(Base);
 var r1arg1;
 var r1arg2;
-var r1 = foo1(r1arg1);
-var r1a = [r1arg2, r1arg1];
-var r1b = [r1arg1, r1arg2];
+var r1 = foo1(r1arg1);// any, return types are not subtype of first overload 
+var r1a = [r1arg2, r1arg1];// generic signature, subtype in both directions 
+var r1b = [r1arg1, r1arg2];// generic signature, subtype in both directions 
 var r2arg1;
 var r2arg2;
 var r2 = foo2(r2arg1);
@@ -223,64 +223,64 @@ var r3a = [r3arg1, r3arg2];
 var r3b = [r3arg2, r3arg1];
 var r4arg1;
 var r4arg2;
-var r4 = foo4(r4arg1);
+var r4 = foo4(r4arg1);// any 
 var r4a = [r4arg1, r4arg2];
 var r4b = [r4arg2, r4arg1];
 var r5arg1;
 var r5arg2;
-var r5 = foo5(r5arg1);
+var r5 = foo5(r5arg1);// any 
 var r5a = [r5arg1, r5arg2];
 var r5b = [r5arg2, r5arg1];
 var r6arg1;
 var r6arg2;
-var r6 = foo6(r6arg1);
+var r6 = foo6(r6arg1);// any 
 var r6a = [r6arg1, r6arg2];
 var r6b = [r6arg2, r6arg1];
 var r7arg1;
 var r7arg2;
-var r7 = foo7(r7arg1);
+var r7 = foo7(r7arg1);// any 
 var r7a = [r7arg1, r7arg2];
 var r7b = [r7arg2, r7arg1];
 var r8arg1;
 var r8arg2;
-var r8 = foo8(r8arg1);
+var r8 = foo8(r8arg1);// any 
 var r8a = [r8arg1, r8arg2];
 var r8b = [r8arg2, r8arg1];
 var r9arg1;
 var r9arg2;
-var r9 = foo9(r9arg1);
+var r9 = foo9(r9arg1);// any 
 var r9a = [r9arg1, r9arg2];
 var r9b = [r9arg2, r9arg1];
 var r10arg1;
 var r10arg2;
-var r10 = foo10(r10arg1);
+var r10 = foo10(r10arg1);// any 
 var r10a = [r10arg1, r10arg2];
 var r10b = [r10arg2, r10arg1];
 var r11arg1;
 var r11arg2;
-var r11 = foo11(r11arg1);
+var r11 = foo11(r11arg1);// any 
 var r11a = [r11arg1, r11arg2];
 var r11b = [r11arg2, r11arg1];
 var r12arg1;
 var r12arg2;
-var r12 = foo12(r12arg1);
+var r12 = foo12(r12arg1);// any 
 var r12a = [r12arg1, r12arg2];
 var r12b = [r12arg2, r12arg1];
 var r13arg1;
 var r13arg2;
-var r13 = foo13(r13arg1);
+var r13 = foo13(r13arg1);// any 
 var r13a = [r13arg1, r13arg2];
 var r13b = [r13arg2, r13arg1];
 var r14arg1;
 var r14arg2;
-var r14 = foo14(r14arg1);
+var r14 = foo14(r14arg1);// any 
 var r14a = [r14arg1, r14arg2];
 var r14b = [r14arg2, r14arg1];
 var r15arg1;
-var r15 = foo15(r15arg1);
+var r15 = foo15(r15arg1);// any 
 var r16arg1;
 var r16 = foo16(r16arg1);
 var r17arg1;
-var r17 = foo17(r17arg1);
+var r17 = foo17(r17arg1);// any 
 var r18arg1;
 var r18 = foo18(r18arg1);
diff --git a/tests/baselines/reference/subtypingWithConstructSignatures3.js b/tests/baselines/reference/subtypingWithConstructSignatures3.js
index 8049413ba6f..698c80269d8 100644
--- a/tests/baselines/reference/subtypingWithConstructSignatures3.js
+++ b/tests/baselines/reference/subtypingWithConstructSignatures3.js
@@ -159,52 +159,52 @@ var Errors;
     })(Base);
     var r1arg1;
     var r1arg2;
-    var r1 = foo2(r1arg1);
+    var r1 = foo2(r1arg1);// any 
     var r1a = [r1arg2, r1arg1];
     var r1b = [r1arg1, r1arg2];
     var r2arg1;
     var r2arg2;
-    var r2 = foo7(r2arg1);
+    var r2 = foo7(r2arg1);// any 
     var r2a = [r2arg2, r2arg1];
     var r2b = [r2arg1, r2arg2];
     var r3arg1;
     var r3arg2;
-    var r3 = foo8(r3arg1);
+    var r3 = foo8(r3arg1);// any 
     var r3a = [r3arg2, r3arg1];
     var r3b = [r3arg1, r3arg2];
     var r4arg1;
     var r4arg2;
-    var r4 = foo10(r4arg1);
+    var r4 = foo10(r4arg1);// any 
     var r4a = [r4arg2, r4arg1];
     var r4b = [r4arg1, r4arg2];
     var r5arg1;
     var r5arg2;
-    var r5 = foo11(r5arg1);
+    var r5 = foo11(r5arg1);// any 
     var r5a = [r5arg2, r5arg1];
     var r5b = [r5arg1, r5arg2];
     var r6arg1;
     var r6arg2;
-    var r6 = foo12(r6arg1);
+    var r6 = foo12(r6arg1);// new (x: Array<Base>, y: Array<Derived2>) => Array<Derived> 
     var r6a = [r6arg2, r6arg1];
     var r6b = [r6arg1, r6arg2];
     var r7arg1;
     var r7arg2;
-    var r7 = foo15(r7arg1);
+    var r7 = foo15(r7arg1);// (x: { a: string; b: number }) => number): number; 
     var r7a = [r7arg2, r7arg1];
     var r7b = [r7arg1, r7arg2];
     var r7arg3;
-    var r7c = foo15(r7arg3);
+    var r7c = foo15(r7arg3);// any 
     var r7d = [r7arg2, r7arg3];
     var r7e = [r7arg3, r7arg2];
     var r8arg;
-    var r8 = foo16(r8arg);
+    var r8 = foo16(r8arg);// any 
     var r9arg;
-    var r9 = foo17(r9arg);
+    var r9 = foo17(r9arg);// // (x: { <T extends Derived >(a: T): T; <T extends Base >(a: T): T; }): any[]; (x: { <T extends Derived2>(a: T): T; <T extends Base>(a: T): T; }): any[]; 
 })(Errors || (Errors = {}));
 var WithGenericSignaturesInBaseType;
 (function (WithGenericSignaturesInBaseType) {
     var r2arg2;
-    var r2 = foo2(r2arg2);
+    var r2 = foo2(r2arg2);// <T>(x:T) => T[] since we can infer from generic signatures now 
     var r3arg2;
-    var r3 = foo3(r3arg2);
+    var r3 = foo3(r3arg2);// any 
 })(WithGenericSignaturesInBaseType || (WithGenericSignaturesInBaseType = {}));
diff --git a/tests/baselines/reference/subtypingWithObjectMembersOptionality2.js b/tests/baselines/reference/subtypingWithObjectMembersOptionality2.js
index 6430fe5da62..74ea8419658 100644
--- a/tests/baselines/reference/subtypingWithObjectMembersOptionality2.js
+++ b/tests/baselines/reference/subtypingWithObjectMembersOptionality2.js
@@ -37,4 +37,4 @@ var r = true ? a : b; // error
 // object literal case
 var a;
 var b;
-var r = true ? a : b;
+var r = true ? a : b;// error 
diff --git a/tests/baselines/reference/subtypingWithObjectMembersOptionality3.js b/tests/baselines/reference/subtypingWithObjectMembersOptionality3.js
index ce3acd6911b..0d301df071a 100644
--- a/tests/baselines/reference/subtypingWithObjectMembersOptionality3.js
+++ b/tests/baselines/reference/subtypingWithObjectMembersOptionality3.js
@@ -37,4 +37,4 @@ var r = true ? a : b; // ok
 // object literal case
 var a;
 var b;
-var r = true ? a : b;
+var r = true ? a : b;// ok 
diff --git a/tests/baselines/reference/subtypingWithObjectMembersOptionality4.js b/tests/baselines/reference/subtypingWithObjectMembersOptionality4.js
index 90d4a247d3e..e6e14ae04d8 100644
--- a/tests/baselines/reference/subtypingWithObjectMembersOptionality4.js
+++ b/tests/baselines/reference/subtypingWithObjectMembersOptionality4.js
@@ -37,4 +37,4 @@ var r = true ? a : b; // ok
 // object literal case
 var a;
 var b;
-var r = true ? a : b;
+var r = true ? a : b;// ok 
diff --git a/tests/baselines/reference/subtypingWithOptionalProperties.js b/tests/baselines/reference/subtypingWithOptionalProperties.js
index c4dfcd2b33e..40a2defdda4 100644
--- a/tests/baselines/reference/subtypingWithOptionalProperties.js
+++ b/tests/baselines/reference/subtypingWithOptionalProperties.js
@@ -17,5 +17,5 @@ function f(a) {
     var b = a;
     return b;
 }
-var r = f({ s: new Object() });
+var r = f({ s: new Object() });// ok 
 r.s && r.s.toFixed();
diff --git a/tests/baselines/reference/superAccess.js b/tests/baselines/reference/superAccess.js
index 70d3cbce619..5d0e858594a 100644
--- a/tests/baselines/reference/superAccess.js
+++ b/tests/baselines/reference/superAccess.js
@@ -34,9 +34,9 @@ var MyDerived = (function (_super) {
         _super.apply(this, arguments);
     }
     MyDerived.prototype.foo = function () {
-        var l3 = _super.prototype.S1;
-        var l4 = _super.prototype.S2;
-        var l5 = _super.prototype.f.call(this);
+        var l3 = _super.prototype.S1;// Expected => Error: Only public instance methods of the base class are accessible via the 'super' keyword 
+        var l4 = _super.prototype.S2;// Expected => Error: Only public instance methods of the base class are accessible via the 'super' keyword 
+        var l5 = _super.prototype.f.call(this);// Expected => Error: Only public instance methods of the base class are accessible via the 'super' keyword 
     };
     return MyDerived;
 })(MyBase);
diff --git a/tests/baselines/reference/superCallAssignResult.js b/tests/baselines/reference/superCallAssignResult.js
index 7ab5e7e069d..f1efa58befd 100644
--- a/tests/baselines/reference/superCallAssignResult.js
+++ b/tests/baselines/reference/superCallAssignResult.js
@@ -25,7 +25,7 @@ var E = (function () {
 var H = (function (_super) {
     __extends(H, _super);
     function H() {
-        var x = _super.call(this, 5);
+        var x = _super.call(this, 5);// Should be of type void, not E. 
         x = 5;
     }
     return H;
diff --git a/tests/baselines/reference/targetTypeBaseCalls.js b/tests/baselines/reference/targetTypeBaseCalls.js
index 59c09aa7ea3..cf076fd78cd 100644
--- a/tests/baselines/reference/targetTypeBaseCalls.js
+++ b/tests/baselines/reference/targetTypeBaseCalls.js
@@ -46,4 +46,4 @@ var Bar = (function (_super) {
         });
     }
     return Bar;
-})(Foo);
+})(Foo);// error, if types are applied correctly 
diff --git a/tests/baselines/reference/targetTypeCalls.js b/tests/baselines/reference/targetTypeCalls.js
index b0f3e13b35f..be383e56065 100644
--- a/tests/baselines/reference/targetTypeCalls.js
+++ b/tests/baselines/reference/targetTypeCalls.js
@@ -10,23 +10,23 @@ var fra1 = function () {
     return function (v) {
         return v;
     };
-}();
+}()// should work ;// should work 
 var fra2 = function () {
     return function () {
         return 0;
     };
-}();
+}()// should work ;// should work 
 var fra3 = function () {
     return function () {
         return function (v) {
             return v;
         };
     }();
-}();
+}()// should work ;// should work 
 var fra4 = function () {
     return function () {
         return function (v) {
             return v;
         };
     }();
-}();
+}()// should work ;// should work 
diff --git a/tests/baselines/reference/targetTypeTest3.js b/tests/baselines/reference/targetTypeTest3.js
index 762d814249c..887ff87efb1 100644
--- a/tests/baselines/reference/targetTypeTest3.js
+++ b/tests/baselines/reference/targetTypeTest3.js
@@ -13,7 +13,7 @@ function func2(stuff1:string, stuff2:number, stuff3:number) {
 
 //// [targetTypeTest3.js]
 // Test target typing for array literals and call expressions
-var a = [1, 2, "3"];
+var a = [1, 2, "3"];// should produce an error 
 function func1(stuff) {
     return stuff;
 }
diff --git a/tests/baselines/reference/thisInInnerFunctions.js b/tests/baselines/reference/thisInInnerFunctions.js
index bce69506a91..152203027bd 100644
--- a/tests/baselines/reference/thisInInnerFunctions.js
+++ b/tests/baselines/reference/thisInInnerFunctions.js
@@ -26,7 +26,7 @@ var Foo = (function () {
         function inner() {
             var _this = this;
             this.y = "hi";
-            var f = function () { return _this.y; };
+            var f = function () { return _this.y; };// 'this' should be not type to 'Foo' either 
         }
     };
     return Foo;
diff --git a/tests/baselines/reference/thisInLambda.js b/tests/baselines/reference/thisInLambda.js
index 772e97562ed..217b4698b8d 100644
--- a/tests/baselines/reference/thisInLambda.js
+++ b/tests/baselines/reference/thisInLambda.js
@@ -26,7 +26,7 @@ var Foo = (function () {
     Foo.prototype.bar = function () {
         var _this = this;
         this.x;
-        var f = function () { return _this.x; };
+        var f = function () { return _this.x; };// 'this' should be type 'Foo' as well 
     };
     return Foo;
 })();
diff --git a/tests/baselines/reference/thisInOuterClassBody.js b/tests/baselines/reference/thisInOuterClassBody.js
index 4a8a881bd0e..05b3d535cc8 100644
--- a/tests/baselines/reference/thisInOuterClassBody.js
+++ b/tests/baselines/reference/thisInOuterClassBody.js
@@ -28,7 +28,7 @@ var Foo = (function () {
     Foo.prototype.bar = function () {
         var _this = this;
         this.x;
-        var f = function () { return _this.x; };
+        var f = function () { return _this.x; };// 'this' should be type 'Foo' as well 
         var p = this.y;
         return this;
     };
diff --git a/tests/baselines/reference/this_inside-enum-should-not-be-allowed.js b/tests/baselines/reference/this_inside-enum-should-not-be-allowed.js
index bb4940eea4f..4fd788b902f 100644
--- a/tests/baselines/reference/this_inside-enum-should-not-be-allowed.js
+++ b/tests/baselines/reference/this_inside-enum-should-not-be-allowed.js
@@ -12,12 +12,12 @@ module ModuleEnum {
 //// [this_inside-enum-should-not-be-allowed.js]
 var TopLevelEnum;
 (function (TopLevelEnum) {
-    TopLevelEnum[TopLevelEnum["ThisWasAllowedButShouldNotBe"] = this] = "ThisWasAllowedButShouldNotBe";
+    TopLevelEnum[TopLevelEnum["ThisWasAllowedButShouldNotBe"] = this] = "ThisWasAllowedButShouldNotBe";// Should not be allowed 
 })(TopLevelEnum || (TopLevelEnum = {}));
 var ModuleEnum;
 (function (ModuleEnum) {
     var EnumInModule;
     (function (EnumInModule) {
-        EnumInModule[EnumInModule["WasADifferentError"] = this] = "WasADifferentError";
+        EnumInModule[EnumInModule["WasADifferentError"] = this] = "WasADifferentError";// this was handled as if this was in a module 
     })(EnumInModule || (EnumInModule = {}));
 })(ModuleEnum || (ModuleEnum = {}));
diff --git a/tests/baselines/reference/topLevelModuleDeclarationAndFile.js b/tests/baselines/reference/topLevelModuleDeclarationAndFile.js
index 2215b7fd0ab..5c7a0b8398f 100644
--- a/tests/baselines/reference/topLevelModuleDeclarationAndFile.js
+++ b/tests/baselines/reference/topLevelModuleDeclarationAndFile.js
@@ -22,5 +22,5 @@ exports.x = 42;
 //// [foo_2.js]
 /// <reference path="foo_1.ts"/>
 var foo = require("vs/foo_0");
-var z1 = foo.x + 10;
-var z2 = foo.y() + 10;
+var z1 = foo.x + 10;// Should error, as declaration should win 
+var z2 = foo.y() + 10;// Should resolve 
diff --git a/tests/baselines/reference/twoInterfacesDifferentRootModule.js b/tests/baselines/reference/twoInterfacesDifferentRootModule.js
index 893aa143e89..2f0bea69aaf 100644
--- a/tests/baselines/reference/twoInterfacesDifferentRootModule.js
+++ b/tests/baselines/reference/twoInterfacesDifferentRootModule.js
@@ -33,9 +33,9 @@ module M2 {
 var M2;
 (function (M2) {
     var a;
-    var r1 = a.foo;
+    var r1 = a.foo;// error 
     var r2 = a.bar;
     var b;
-    var r3 = b.foo;
+    var r3 = b.foo;// error 
     var r4 = b.bar;
 })(M2 || (M2 = {}));
diff --git a/tests/baselines/reference/twoInterfacesDifferentRootModule2.js b/tests/baselines/reference/twoInterfacesDifferentRootModule2.js
index 7eb4fd19903..3776cd81db9 100644
--- a/tests/baselines/reference/twoInterfacesDifferentRootModule2.js
+++ b/tests/baselines/reference/twoInterfacesDifferentRootModule2.js
@@ -44,16 +44,16 @@ var M;
     var M2;
     (function (M2) {
         var a;
-        var r1 = a.foo;
+        var r1 = a.foo;// error 
         var r2 = a.bar;
         var b;
-        var r3 = b.foo;
+        var r3 = b.foo;// error 
         var r4 = b.bar;
     })(M2 || (M2 = {}));
     var a;
     var r1 = a.foo;
-    var r2 = a.bar;
+    var r2 = a.bar;// error 
     var b;
     var r3 = b.foo;
-    var r4 = b.bar;
+    var r4 = b.bar;// error 
 })(M || (M = {}));
diff --git a/tests/baselines/reference/twoMergedInterfacesWithDifferingOverloads.js b/tests/baselines/reference/twoMergedInterfacesWithDifferingOverloads.js
index b6b32fb70a1..eb7f9451a71 100644
--- a/tests/baselines/reference/twoMergedInterfacesWithDifferingOverloads.js
+++ b/tests/baselines/reference/twoMergedInterfacesWithDifferingOverloads.js
@@ -52,8 +52,8 @@ var r3 = d.foo(1, 1); // boolean, last definition wins
 
 //// [twoMergedInterfacesWithDifferingOverloads.js]
 var b;
-var r = b.foo(true);
+var r = b.foo(true);// returns Date 
 var c;
-var r2 = c.foo(1, 2);
+var r2 = c.foo(1, 2);// number 
 var d;
-var r3 = d.foo(1, 1);
+var r3 = d.foo(1, 1);// boolean, last definition wins 
diff --git a/tests/baselines/reference/typeArgInference2.js b/tests/baselines/reference/typeArgInference2.js
index 9ef5987442e..f5ca6bfa4f5 100644
--- a/tests/baselines/reference/typeArgInference2.js
+++ b/tests/baselines/reference/typeArgInference2.js
@@ -13,9 +13,9 @@ var z5 = foo({ name: "abc", a: 5 });  // { name: string; a: number }
 var z6 = foo({ name: "abc", a: 5 }, { name: "def", b: 5 });  // Item
 
 //// [typeArgInference2.js]
-var z1 = foo(null);
-var z2 = foo();
-var z3 = foo({ name: null });
-var z4 = foo({ name: "abc" });
-var z5 = foo({ name: "abc", a: 5 });
-var z6 = foo({ name: "abc", a: 5 }, { name: "def", b: 5 });
+var z1 = foo(null);// any 
+var z2 = foo();// Item 
+var z3 = foo({ name: null });// { name: any } 
+var z4 = foo({ name: "abc" });// { name: string } 
+var z5 = foo({ name: "abc", a: 5 });// { name: string; a: number } 
+var z6 = foo({ name: "abc", a: 5 }, { name: "def", b: 5 });// Item 
diff --git a/tests/baselines/reference/typeArgInference2WithError.js b/tests/baselines/reference/typeArgInference2WithError.js
index 72fa35e7fe9..4e3c0335264 100644
--- a/tests/baselines/reference/typeArgInference2WithError.js
+++ b/tests/baselines/reference/typeArgInference2WithError.js
@@ -8,4 +8,4 @@ declare function foo<T extends Item>(x?: T, y?: T): T;
 var z7 = foo("abc", 5); // Error
 
 //// [typeArgInference2WithError.js]
-var z7 = foo("abc", 5);
+var z7 = foo("abc", 5);// Error 
diff --git a/tests/baselines/reference/typeArgumentInferenceOrdering.js b/tests/baselines/reference/typeArgumentInferenceOrdering.js
index 5f5d566aadf..fb74f605bc9 100644
--- a/tests/baselines/reference/typeArgumentInferenceOrdering.js
+++ b/tests/baselines/reference/typeArgumentInferenceOrdering.js
@@ -19,7 +19,7 @@ interface Goo {
 function foo(f) {
     return null;
 }
-var x = foo(new C()).x;
+var x = foo(new C()).x;// was Error that property x does not exist on type {} 
 var C = (function () {
     function C() {
     }
diff --git a/tests/baselines/reference/typeArgumentInferenceTransitiveConstraints.js b/tests/baselines/reference/typeArgumentInferenceTransitiveConstraints.js
index 3043a247d1f..9f9d3336f04 100644
--- a/tests/baselines/reference/typeArgumentInferenceTransitiveConstraints.js
+++ b/tests/baselines/reference/typeArgumentInferenceTransitiveConstraints.js
@@ -13,4 +13,4 @@ function fn(a, b, c) {
     return [a, b, c];
 }
 var d = fn(new Date(), new Date(), new Date());
-var d;
+var d;// Should be OK (d should be Date[]) 
diff --git a/tests/baselines/reference/typeArgumentInferenceWithConstraints.js b/tests/baselines/reference/typeArgumentInferenceWithConstraints.js
index cfa8ef38295..1eb38fc07c6 100644
--- a/tests/baselines/reference/typeArgumentInferenceWithConstraints.js
+++ b/tests/baselines/reference/typeArgumentInferenceWithConstraints.js
@@ -173,7 +173,7 @@ someGenerics7(function (n) { return n; }, function (n) { return n; }, function (
 function someGenerics8(n) {
     return n;
 }
-var x = someGenerics8(someGenerics7);
+var x = someGenerics8(someGenerics7);// Error 
 x(null, null, null);
 // Generic call with multiple parameters of generic type passed arguments with no best common type
 function someGenerics9(a, b, c) {
diff --git a/tests/baselines/reference/typeArgumentsShouldDisallowNonGenericOverloads.js b/tests/baselines/reference/typeArgumentsShouldDisallowNonGenericOverloads.js
index 03786b4d1d1..ad2c4f01825 100644
--- a/tests/baselines/reference/typeArgumentsShouldDisallowNonGenericOverloads.js
+++ b/tests/baselines/reference/typeArgumentsShouldDisallowNonGenericOverloads.js
@@ -15,7 +15,7 @@ var z: number = foo("hi"); // should error
 function foo(a) {
     return "hi";
 }
-var x = foo("hi");
-var y = foo("hi");
-var w = foo("hi");
-var z = foo("hi");
+var x = foo("hi");// return type should be 'number' 
+var y = foo("hi");// return type should be 'string' 
+var w = foo("hi");// should error 
+var z = foo("hi");// should error 
diff --git a/tests/baselines/reference/typeConstraintsWithConstructSignatures.js b/tests/baselines/reference/typeConstraintsWithConstructSignatures.js
index 96f56339262..bbaa57e9594 100644
--- a/tests/baselines/reference/typeConstraintsWithConstructSignatures.js
+++ b/tests/baselines/reference/typeConstraintsWithConstructSignatures.js
@@ -19,8 +19,8 @@ var C = (function () {
         this.data2 = data2;
     }
     C.prototype.create = function () {
-        var x = new this.data();
-        var x2 = new this.data2();
+        var x = new this.data();// should not error 
+        var x2 = new this.data2();// should not error 
     };
     return C;
 })();
diff --git a/tests/baselines/reference/typeOfEnumAndVarRedeclarations.js b/tests/baselines/reference/typeOfEnumAndVarRedeclarations.js
index 8eb669ddafd..e5d45aee948 100644
--- a/tests/baselines/reference/typeOfEnumAndVarRedeclarations.js
+++ b/tests/baselines/reference/typeOfEnumAndVarRedeclarations.js
@@ -20,6 +20,6 @@ var E;
     E[E["b"] = 1] = "b";
 })(E || (E = {}));
 var x = E;
-var x;
+var x;// Shouldnt error 
 var y = E;
-var y;
+var y// two errors: the types are not identical and duplicate signatures ;// two errors: the types are not identical and duplicate signatures 
diff --git a/tests/baselines/reference/typeOfThisInStaticMembers2.js b/tests/baselines/reference/typeOfThisInStaticMembers2.js
index 255436783a1..25b51210b53 100644
--- a/tests/baselines/reference/typeOfThisInStaticMembers2.js
+++ b/tests/baselines/reference/typeOfThisInStaticMembers2.js
@@ -11,12 +11,12 @@ class C2<T> {
 var C = (function () {
     function C() {
     }
-    C.foo = this;
+    C.foo = this;// error 
     return C;
 })();
 var C2 = (function () {
     function C2() {
     }
-    C2.foo = this;
+    C2.foo = this;// error 
     return C2;
 })();
diff --git a/tests/baselines/reference/typeParameterAsTypeParameterConstraint2.js b/tests/baselines/reference/typeParameterAsTypeParameterConstraint2.js
index 32a49dc8167..5c90057a262 100644
--- a/tests/baselines/reference/typeParameterAsTypeParameterConstraint2.js
+++ b/tests/baselines/reference/typeParameterAsTypeParameterConstraint2.js
@@ -23,14 +23,14 @@ foo2([], ['']);
 // these should be errors unless otherwise noted
 function foo(x, y) {
     return y;
-}
+}// this is now an error 
 foo(1, '');
 foo(1, {});
 var n;
 var r3 = foo(1, n);
 function foo2(x, y) {
     return y;
-}
+}// this is now an error 
 foo2(1, { length: '' });
 foo2(1, { length: {} });
 foo2([], ['']);
diff --git a/tests/baselines/reference/typeParameterConstrainedToOuterTypeParameter.js b/tests/baselines/reference/typeParameterConstrainedToOuterTypeParameter.js
index ccb0051db9a..91fa6b2cff1 100644
--- a/tests/baselines/reference/typeParameterConstrainedToOuterTypeParameter.js
+++ b/tests/baselines/reference/typeParameterConstrainedToOuterTypeParameter.js
@@ -12,4 +12,4 @@ var b: B<string> = a; // assignment should be legal (both U's get instantiated t
 
 //// [typeParameterConstrainedToOuterTypeParameter.js]
 var a;
-var b = a;
+var b = a;// assignment should be legal (both U's get instantiated to any for comparison) 
diff --git a/tests/baselines/reference/typecheckIfCondition.js b/tests/baselines/reference/typecheckIfCondition.js
index b6d4ef5fdc5..6d395a60b87 100644
--- a/tests/baselines/reference/typecheckIfCondition.js
+++ b/tests/baselines/reference/typecheckIfCondition.js
@@ -12,5 +12,5 @@ function myWrapper()
 function myWrapper() {
     if (!module.exports)
         module.exports = "";
-    var x = null;
+    var x = null;// don't want to baseline output 
 }
diff --git a/tests/baselines/reference/typeofInObjectLiteralType.js b/tests/baselines/reference/typeofInObjectLiteralType.js
index 401a59fb6b4..7f2cabc986d 100644
--- a/tests/baselines/reference/typeofInObjectLiteralType.js
+++ b/tests/baselines/reference/typeofInObjectLiteralType.js
@@ -2,4 +2,4 @@
 var a: { b: number; c: typeof b }; // Should give error for attempting to use type query on b.
 
 //// [typeofInObjectLiteralType.js]
-var a;
+var a;// Should give error for attempting to use type query on b. 
diff --git a/tests/baselines/reference/typeofInternalModules.js b/tests/baselines/reference/typeofInternalModules.js
index 9a4550b909f..2a62b558286 100644
--- a/tests/baselines/reference/typeofInternalModules.js
+++ b/tests/baselines/reference/typeofInternalModules.js
@@ -40,7 +40,7 @@ var Outer;
 var importInst = Outer.instantiated;
 var x1 = importInst.C;
 var x2 = new x1();
-var x3;
+var x3;// Error again 
 var x4 = Outer;
 var x5;
 x5 = Outer;
diff --git a/tests/baselines/reference/typeofProperty.js b/tests/baselines/reference/typeofProperty.js
index 8b621f0ae2e..7972c04316b 100644
--- a/tests/baselines/reference/typeofProperty.js
+++ b/tests/baselines/reference/typeofProperty.js
@@ -71,5 +71,5 @@ var ValidClass = (function () {
 })();
 var vcInstance = new ValidClass();
 var viInstance = vcInstance;
-var x1;
-var x2;
+var x1;// x1: string 
+var x2;// x2: string 
diff --git a/tests/baselines/reference/typeofSimple.js b/tests/baselines/reference/typeofSimple.js
index bd3e7512461..c4a8ecdb216 100644
--- a/tests/baselines/reference/typeofSimple.js
+++ b/tests/baselines/reference/typeofSimple.js
@@ -15,8 +15,8 @@ numberI = fun();
 //// [typeofSimple.js]
 var v = 3;
 var v2;
-var v3 = v2;
-var numberJ;
+var v3 = v2;// Not assignment compatible 
+var numberJ;//Error, cannot reference type in typeof 
 var numberI;
 var fun;
 numberI = fun();
diff --git a/tests/baselines/reference/typeofUndefined.js b/tests/baselines/reference/typeofUndefined.js
index 4f27c85ebcf..e2197c35530 100644
--- a/tests/baselines/reference/typeofUndefined.js
+++ b/tests/baselines/reference/typeofUndefined.js
@@ -5,7 +5,7 @@ var x: any; // shouldn't be an error since type is the same as the first declara
 
 //// [typeofUndefined.js]
 var x;
-var x;
+var x;// shouldn't be an error since type is the same as the first declaration 
 
 
 //// [typeofUndefined.d.ts]
diff --git a/tests/baselines/reference/unaryPlus.js b/tests/baselines/reference/unaryPlus.js
index 35e6e28693b..8bd982e09f4 100644
--- a/tests/baselines/reference/unaryPlus.js
+++ b/tests/baselines/reference/unaryPlus.js
@@ -23,6 +23,6 @@ var E;
 ;
 var c = +0 /* some */;
 // also allowed, used to be errors
-var x = +"3";
-var y = -"3";
-var z = ~"3";
+var x = +"3";//should be valid 
+var y = -"3";// should be valid 
+var z = ~"3";// should be valid 
diff --git a/tests/baselines/reference/undefinedInferentialTyping.js b/tests/baselines/reference/undefinedInferentialTyping.js
index 0a094eea635..5556700863d 100644
--- a/tests/baselines/reference/undefinedInferentialTyping.js
+++ b/tests/baselines/reference/undefinedInferentialTyping.js
@@ -9,4 +9,4 @@ var a = f([], 3); // should be number
 function f(arr, elemnt) {
     return null;
 }
-var a = f([], 3);
+var a = f([], 3);// should be number 
diff --git a/tests/baselines/reference/unknownSymbols1.js b/tests/baselines/reference/unknownSymbols1.js
index 55aa9b92cb5..62000053faf 100644
--- a/tests/baselines/reference/unknownSymbols1.js
+++ b/tests/baselines/reference/unknownSymbols1.js
@@ -46,7 +46,7 @@ function foo(x, y) {
 function foo2() {
     return asdf;
 }
-var z = x;
+var z = x;// should be an error 
 var C = (function () {
     function C() {
     }
@@ -69,7 +69,7 @@ var C4 = (function (_super) {
     }
     return C4;
 })(C3);
-var x2 = this.asdf;
+var x2 = this.asdf;// no error, this is any 
 var C5 = (function () {
     function C5() {
         this.asdf = asdf;
diff --git a/tests/baselines/reference/unknownSymbols2.js b/tests/baselines/reference/unknownSymbols2.js
index f4cb3c45dec..930bdc8d373 100644
--- a/tests/baselines/reference/unknownSymbols2.js
+++ b/tests/baselines/reference/unknownSymbols2.js
@@ -35,7 +35,7 @@ var M;
 (function (M) {
     var x;
     var y = x + asdf;
-    var z = x;
+    var z = x;// should be an error 
     if (asdf) {
     }
     else if (qwerty) {
diff --git a/tests/baselines/reference/untypedFunctionCallsWithTypeParameters1.js b/tests/baselines/reference/untypedFunctionCallsWithTypeParameters1.js
index 76f37755898..c686a7276d7 100644
--- a/tests/baselines/reference/untypedFunctionCallsWithTypeParameters1.js
+++ b/tests/baselines/reference/untypedFunctionCallsWithTypeParameters1.js
@@ -58,7 +58,7 @@ var r1 = x();
 var y = x;
 var r2 = y();
 var c;
-var r3 = c();
+var r3 = c();// should be an error 
 var C = (function () {
     function C() {
         this.prototype = null;
@@ -70,18 +70,18 @@ var C = (function () {
     return C;
 })();
 var c2;
-var r4 = c2();
+var r4 = c2();// should be an error 
 var C2 = (function (_super) {
     __extends(C2, _super);
     function C2() {
         _super.apply(this, arguments);
     }
     return C2;
-})(Function);
+})(Function);// error 
 var c3;
-var r5 = c3();
+var r5 = c3();// error 
 var z;
-var r6 = z(1);
+var r6 = z(1);// error 
 var c4;
 c4(1);
 var c5;
diff --git a/tests/baselines/reference/varNameConflictsWithImportInDifferentPartOfModule.js b/tests/baselines/reference/varNameConflictsWithImportInDifferentPartOfModule.js
index 4c96327e807..8e98e05de55 100644
--- a/tests/baselines/reference/varNameConflictsWithImportInDifferentPartOfModule.js
+++ b/tests/baselines/reference/varNameConflictsWithImportInDifferentPartOfModule.js
@@ -15,5 +15,5 @@ var M1;
 })(M1 || (M1 = {}));
 var M1;
 (function (M1) {
-    M1.q = M1.s;
+    M1.q = M1.s;// Should be an error but isn't 
 })(M1 || (M1 = {}));
diff --git a/tests/baselines/reference/voidArrayLit.js b/tests/baselines/reference/voidArrayLit.js
index a7b9b37e88c..033cc2b5c40 100644
--- a/tests/baselines/reference/voidArrayLit.js
+++ b/tests/baselines/reference/voidArrayLit.js
@@ -7,7 +7,7 @@ foo((()=>{})()); // error
 
 //// [voidArrayLit.js]
 var va = [(function () {
-})()];
+})()];// ok 
 (function () {
 })();
 function foo(s) {
diff --git a/tests/baselines/reference/voidFunctionAssignmentCompat.js b/tests/baselines/reference/voidFunctionAssignmentCompat.js
index 9a01d2e9587..53d9712b5a0 100644
--- a/tests/baselines/reference/voidFunctionAssignmentCompat.js
+++ b/tests/baselines/reference/voidFunctionAssignmentCompat.js
@@ -24,12 +24,12 @@ var fa = function () {
     return 3;
 };
 fa = function () {
-};
+}// should not work ;
 var fv = function () {
 };
 fv = function () {
     return 0;
-};
+}// should work ;
 function execAny(callback) {
     return callback(0);
 }
@@ -44,19 +44,19 @@ execVoid(function () {
 var fra = function () {
     return function () {
     };
-};
+}// should work // should work ;// should work 
 var frv = function () {
     return function () {
         return 0;
     };
-};
+}// should work // should work ;// should work 
 var fra3 = (function () {
     return function (v) {
         return v;
     };
-})();
+})()// should work ;// should work 
 var frv3 = (function () {
     return function () {
         return 0;
     };
-})();
+})()// should work ;// should work 
diff --git a/tests/baselines/reference/widenToAny1.js b/tests/baselines/reference/widenToAny1.js
index 3225163e33b..0676186eb11 100644
--- a/tests/baselines/reference/widenToAny1.js
+++ b/tests/baselines/reference/widenToAny1.js
@@ -10,4 +10,4 @@ var z1: number = foo1({ x: undefined, y: "def" });  // Best common type is any
 function foo1(f1) {
     return undefined;
 }
-var z1 = foo1({ x: undefined, y: "def" });
+var z1 = foo1({ x: undefined, y: "def" });// Best common type is any 
diff --git a/tests/baselines/reference/widenToAny2.js b/tests/baselines/reference/widenToAny2.js
index 7ec5d93f0c0..2d8185371c3 100644
--- a/tests/baselines/reference/widenToAny2.js
+++ b/tests/baselines/reference/widenToAny2.js
@@ -9,4 +9,4 @@ var z3:number = foo3([undefined, "def"]);  // Type is any, but should be string
 function foo3(x) {
     return undefined;
 }
-var z3 = foo3([undefined, "def"]);
+var z3 = foo3([undefined, "def"]);// Type is any, but should be string 
diff --git a/tests/baselines/reference/widenedTypes.js b/tests/baselines/reference/widenedTypes.js
index ac97daa1136..6e77399b899 100644
--- a/tests/baselines/reference/widenedTypes.js
+++ b/tests/baselines/reference/widenedTypes.js
@@ -41,5 +41,5 @@ var u = [3, (y = null)];
 u[3] = "";
 var ob = { x: "" };
 // Highlights the difference between array literals and object literals
-var arr = [3, null];
-var obj = { x: 3, y: null };
+var arr = [3, null];// not assignable because null is not widened. BCT is {} 
+var obj = { x: 3, y: null };// assignable because null is widened, and therefore BCT is any 
diff --git a/tests/baselines/reference/witness.js b/tests/baselines/reference/witness.js
index 51245096216..ccd1cdc68a7 100644
--- a/tests/baselines/reference/witness.js
+++ b/tests/baselines/reference/witness.js
@@ -142,7 +142,7 @@ var qq: any;
 
 //// [witness.js]
 // Initializers
-var varInit = varInit;
+var varInit = varInit;// any 
 var pInit;
 function fn(pInit) {
     if (pInit === void 0) { pInit = pInit; }
@@ -217,7 +217,7 @@ function overload1() {
 function fnArg2() {
     return overload1(fnArg2);
 }
-var t = fnArg2();
+var t = fnArg2();// t: should be 'any', but is 'string' 
 // New operator
 var C = (function () {
     function C() {
@@ -238,7 +238,7 @@ function fn5() {
     var a;
     return new a(fn5);
 }
-var fn5r = fn5();
+var fn5r = fn5();// fn5r: should be 'any', but is 'number' 
 // Property access
 var propAcc1 = {
     m: propAcc1.m
@@ -254,7 +254,7 @@ var M2;
 // Property access of class instance type
 var C2 = (function () {
     function C2() {
-        this.n = this.n;
+        this.n = this.n;// n: any 
     }
     return C2;
 })();
diff --git a/tests/baselines/reference/wrappedAndRecursiveConstraints2.js b/tests/baselines/reference/wrappedAndRecursiveConstraints2.js
index 5c4b65f7273..639783625b2 100644
--- a/tests/baselines/reference/wrappedAndRecursiveConstraints2.js
+++ b/tests/baselines/reference/wrappedAndRecursiveConstraints2.js
@@ -13,4 +13,4 @@ var C = (function () {
     return C;
 })();
 var c = new C(1);
-var c = new C(new C(''));
+var c = new C(new C(''));// error 
diff --git a/tests/baselines/reference/wrappedAndRecursiveConstraints4.js b/tests/baselines/reference/wrappedAndRecursiveConstraints4.js
index 4e7a329bdb1..cd9b5635ad3 100644
--- a/tests/baselines/reference/wrappedAndRecursiveConstraints4.js
+++ b/tests/baselines/reference/wrappedAndRecursiveConstraints4.js
@@ -29,4 +29,4 @@ var c = new C({ length: 2 });
 var r = c.foo('');
 var r2 = r({ length: 3, charAt: function (x) {
     '';
-} });
+} });// error