From 7d773f18e09de59fc49090307b5980529fe97d0d Mon Sep 17 00:00:00 2001
From: Tingan Ho <tingan87@gmail.com>
Date: Sat, 21 Jan 2017 17:07:37 +0100
Subject: [PATCH] Adds non-ambient context check

---
 src/compiler/checker.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 5f80444c73e..2cac77bf576 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -1,4 +1,4 @@
-/// <reference path="moduleNameResolver.ts"/>
+/// <reference path="moduleNameResolver.ts"/>
 /// <reference path="binder.ts"/>
 
 /* @internal */
@@ -18337,7 +18337,11 @@ namespace ts {
             const staticType = <ObjectType>getTypeOfSymbol(symbol);
             checkTypeParameterListsIdentical(node, symbol);
             checkClassForDuplicateDeclarations(node);
+
+            // Only check for reserved static identifiers on non-ambient context.
+            if (!isInAmbientContext(node)) {
             checkClassForStaticPropertyNameConflicts(node);
+            }
 
             const baseTypeNode = getClassExtendsHeritageClauseElement(node);
             if (baseTypeNode) {