From cad693de0fd2662234eb692a2dae07261b5aa6be Mon Sep 17 00:00:00 2001
From: PatrickJS <github@gdi2290.com>
Date: Mon, 21 Mar 2016 13:57:02 -0700
Subject: [PATCH] refactor(NgZoneImpl): ensure zone spec is available

trace could be true (in dev mode) while there is no long stack trace spec
Closes #7702
---
 modules/angular2/src/core/zone/ng_zone_impl.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/angular2/src/core/zone/ng_zone_impl.ts b/modules/angular2/src/core/zone/ng_zone_impl.ts
index 96ef145837..e9d513202d 100644
--- a/modules/angular2/src/core/zone/ng_zone_impl.ts
+++ b/modules/angular2/src/core/zone/ng_zone_impl.ts
@@ -41,7 +41,7 @@ export class NgZoneImpl {
       if (Zone['wtfZoneSpec']) {
         this.inner = this.inner.fork(Zone['wtfZoneSpec']);
       }
-      if (trace) {
+      if (trace && Zone['longStackTraceZoneSpec']) {
         this.inner = this.inner.fork(Zone['longStackTraceZoneSpec']);
       }
       this.inner = this.inner.fork({