From 8c33a792b3293f838d47c87ffb46153f384483eb Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Tue, 18 Apr 2017 16:19:58 -0700
Subject: [PATCH] Do not query for bind errors if skipLibCheck or
 skipDefaultLibCheck is set

---
 src/compiler/program.ts                                  | 7 +++++++
 tests/cases/compiler/noDefaultLib.ts                     | 1 +
 tests/cases/compiler/variableDeclarationInStrictMode1.ts | 1 +
 3 files changed, 9 insertions(+)

diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 0971adfc098..347e6e97ebd 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -908,6 +908,13 @@ namespace ts {
 
         function getSemanticDiagnosticsForFileNoCache(sourceFile: SourceFile, cancellationToken: CancellationToken): Diagnostic[] {
             return runWithCancellationToken(() => {
+                // If skipLibCheck is enabled, skip reporting errors if file is a declaration file.
+                // If skipDefaultLibCheck is enabled, skip reporting errors if file contains a
+                // '/// <reference no-default-lib="true"/>' directive.
+                if (options.skipLibCheck && sourceFile.isDeclarationFile || options.skipDefaultLibCheck && sourceFile.hasNoDefaultLib) {
+                    return emptyArray;
+                }
+
                 const typeChecker = getDiagnosticsProducingTypeChecker();
 
                 Debug.assert(!!sourceFile.bindDiagnostics);
diff --git a/tests/cases/compiler/noDefaultLib.ts b/tests/cases/compiler/noDefaultLib.ts
index 92c8a63fc64..fa1230e4cfe 100644
--- a/tests/cases/compiler/noDefaultLib.ts
+++ b/tests/cases/compiler/noDefaultLib.ts
@@ -1,3 +1,4 @@
+// @skipDefaultLibCheck: false
 /// <reference no-default-lib="true"/>
 var x;
 
diff --git a/tests/cases/compiler/variableDeclarationInStrictMode1.ts b/tests/cases/compiler/variableDeclarationInStrictMode1.ts
index 266e5af44ae..5785beb32aa 100644
--- a/tests/cases/compiler/variableDeclarationInStrictMode1.ts
+++ b/tests/cases/compiler/variableDeclarationInStrictMode1.ts
@@ -1,2 +1,3 @@
+// @skipDefaultLibCheck: false
 "use strict";
 var eval;
\ No newline at end of file