From e8ec2966a264a2c61bfe841697035e188ca39d9b Mon Sep 17 00:00:00 2001
From: Daniel Rosenwasser <drosen@microsoft.com>
Date: Wed, 12 Nov 2014 17:23:00 -0800
Subject: [PATCH] Removed lookup of TemplateStringsArray for non-ES6 targets.

This will enable custom ES3/ES5 lib.d.ts files that omit the TemplateStringsArray type, but don't need it anyway.
---
 src/compiler/checker.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 5a990d4e9db..ac1edd33f6a 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -9102,7 +9102,10 @@ module ts {
             globalNumberType = getGlobalType("Number");
             globalBooleanType = getGlobalType("Boolean");
             globalRegExpType = getGlobalType("RegExp");
-            globalTemplateStringsArrayType = getGlobalType("TemplateStringsArray");
+
+            if (compilerOptions.target >= ScriptTarget.ES6) {
+                globalTemplateStringsArrayType = getGlobalType("TemplateStringsArray");
+            }
         }
 
         initializeTypeChecker();