From 3b23ab5fb75e27b2c2a5818a71ca89fd9749ccb0 Mon Sep 17 00:00:00 2001
From: Ryohei Ikegami <iofg2100@gmail.com>
Date: Sun, 25 Oct 2015 12:23:24 +0900
Subject: [PATCH 1/4] Do not type non-identifier binding name

---
 src/compiler/checker.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index fd6b1d81818..734c2425aef 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -9414,7 +9414,9 @@ namespace ts {
             if (isBindingPattern(node.name)) {
                 for (let element of (<BindingPattern>node.name).elements) {
                     if (element.kind !== SyntaxKind.OmittedExpression) {
-                        getSymbolLinks(getSymbolOfNode(element)).type = getTypeForBindingElement(element);
+                        if (element.name.kind === SyntaxKind.Identifier) {
+                            getSymbolLinks(getSymbolOfNode(element)).type = getTypeForBindingElement(element);
+                        }
                         assignBindingElementTypes(element);
                     }
                 }

From f7f9bd1d2431c1b2cc2d80f6344d552f0230fb11 Mon Sep 17 00:00:00 2001
From: Ryohei Ikegami <iofg2100@gmail.com>
Date: Sun, 25 Oct 2015 13:13:38 +0900
Subject: [PATCH 2/4] Add tests for nested destructuring

---
 .../fourslash/parameterWithNestedDestructuring.ts      | 10 ++++++++++
 1 file changed, 10 insertions(+)
 create mode 100644 tests/cases/fourslash/parameterWithNestedDestructuring.ts

diff --git a/tests/cases/fourslash/parameterWithNestedDestructuring.ts b/tests/cases/fourslash/parameterWithNestedDestructuring.ts
new file mode 100644
index 00000000000..fa3c4e55294
--- /dev/null
+++ b/tests/cases/fourslash/parameterWithNestedDestructuring.ts
@@ -0,0 +1,10 @@
+/// <reference path='fourslash.ts'/>
+
+////[[{foo: 'hello', bar: [1]}]]
+////  .map(([{foo, bar: [baz]}]) => /*1*/foo + /*2*/baz);
+
+goTo.marker('1');
+verify.quickInfoIs('var foo: string');
+
+goTo.marker('2');
+verify.quickInfoIs('var baz: number');

From a3f09c343bbe1f84f2fdd36fc3b3217bbda660ec Mon Sep 17 00:00:00 2001
From: Ryohei Ikegami <iofg2100@gmail.com>
Date: Tue, 27 Oct 2015 11:50:43 +0900
Subject: [PATCH 3/4] Add compiler test

---
 tests/cases/compiler/bindingPatternInParameter01.ts | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 tests/cases/compiler/bindingPatternInParameter01.ts

diff --git a/tests/cases/compiler/bindingPatternInParameter01.ts b/tests/cases/compiler/bindingPatternInParameter01.ts
new file mode 100644
index 00000000000..3b3a4312f87
--- /dev/null
+++ b/tests/cases/compiler/bindingPatternInParameter01.ts
@@ -0,0 +1,5 @@
+const nestedArray = [[[1, 2]], [[3, 4]]];
+
+nestedArray.forEach(([[a, b]]) => {
+  console.log(a, b);
+});

From e64831b2b8f3f16c5da929fa13993c27165b6a55 Mon Sep 17 00:00:00 2001
From: Ryohei Ikegami <iofg2100@gmail.com>
Date: Tue, 27 Oct 2015 11:59:48 +0900
Subject: [PATCH 4/4] Accept baseline

---
 .../bindingPatternInParameter01.errors.txt         | 12 ++++++++++++
 .../reference/bindingPatternInParameter01.js       | 14 ++++++++++++++
 2 files changed, 26 insertions(+)
 create mode 100644 tests/baselines/reference/bindingPatternInParameter01.errors.txt
 create mode 100644 tests/baselines/reference/bindingPatternInParameter01.js

diff --git a/tests/baselines/reference/bindingPatternInParameter01.errors.txt b/tests/baselines/reference/bindingPatternInParameter01.errors.txt
new file mode 100644
index 00000000000..bee1f47141e
--- /dev/null
+++ b/tests/baselines/reference/bindingPatternInParameter01.errors.txt
@@ -0,0 +1,12 @@
+tests/cases/compiler/bindingPatternInParameter01.ts(4,3): error TS2304: Cannot find name 'console'.
+
+
+==== tests/cases/compiler/bindingPatternInParameter01.ts (1 errors) ====
+    const nestedArray = [[[1, 2]], [[3, 4]]];
+    
+    nestedArray.forEach(([[a, b]]) => {
+      console.log(a, b);
+      ~~~~~~~
+!!! error TS2304: Cannot find name 'console'.
+    });
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/bindingPatternInParameter01.js b/tests/baselines/reference/bindingPatternInParameter01.js
new file mode 100644
index 00000000000..27b3a59e81e
--- /dev/null
+++ b/tests/baselines/reference/bindingPatternInParameter01.js
@@ -0,0 +1,14 @@
+//// [bindingPatternInParameter01.ts]
+const nestedArray = [[[1, 2]], [[3, 4]]];
+
+nestedArray.forEach(([[a, b]]) => {
+  console.log(a, b);
+});
+
+
+//// [bindingPatternInParameter01.js]
+var nestedArray = [[[1, 2]], [[3, 4]]];
+nestedArray.forEach(function (_a) {
+    var _b = _a[0], a = _b[0], b = _b[1];
+    console.log(a, b);
+});