From 7809bcbf847a3692b8522510e8ea7a1783426f6f Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Tue, 22 Mar 2016 09:01:00 -0700
Subject: [PATCH] Always consider ambient variables assigned

---
 src/compiler/checker.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 92c5065b7dd..cb266c3ace4 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -7725,7 +7725,7 @@ namespace ts {
                 return;
             }
             const declaration = symbol.valueDeclaration;
-            if (!declaration || declaration.kind !== SyntaxKind.VariableDeclaration || (<VariableDeclaration>declaration).initializer) {
+            if (!declaration || declaration.kind !== SyntaxKind.VariableDeclaration || (<VariableDeclaration>declaration).initializer || isInAmbientContext(declaration)) {
                 return;
             }
             const parentParentKind = declaration.parent.parent.kind;