From 41f6c5ef6b758e65b10e62e72198fb6857dede8e Mon Sep 17 00:00:00 2001
From: Yui T <yuisu@microsoft.com>
Date: Mon, 6 Feb 2017 20:07:58 -0800
Subject: [PATCH] Only report an error in non ambient context and with no
 noEmit flag

---
 src/compiler/checker.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index eb78885ea5e..1564f0c7f69 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -21909,7 +21909,8 @@ namespace ts {
                 }
             }
 
-            if (hasModifier(node.parent.parent, ModifierFlags.Export) && compilerOptions.module !== ModuleKind.ES2015) {
+            if (compilerOptions.module !== ModuleKind.ES2015 && !compilerOptions.noEmit &&
+                !isInAmbientContext(node.parent.parent) && hasModifier(node.parent.parent, ModifierFlags.Export)) {
                 checkESModuleMarker(node.name);
             }