From ba63a92de021193c90794c54fefae39d806fba4a Mon Sep 17 00:00:00 2001
From: Craig <cnishina@users.noreply.github.com>
Date: Tue, 28 Jun 2016 14:30:57 -0700
Subject: [PATCH] fix(util): check stack exists before filtering the stack
 trace (#3309)

closes #3224
---
 lib/util.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/util.ts b/lib/util.ts
index 3887f8b26..eb45f0e75 100644
--- a/lib/util.ts
+++ b/lib/util.ts
@@ -49,7 +49,9 @@ export function runFilenameOrFn_(
     }
     if (typeof filenameOrFn === 'function') {
       let results = when(filenameOrFn.apply(null, args), null, (err) => {
-        err.stack = exports.filterStackTrace(err.stack);
+        if (err.stack) {
+          err.stack = exports.filterStackTrace(err.stack);
+        }
         throw err;
       });
       resolvePromise(results);