From 282139fc63c4d0cac801ea937d50f541ca78b87b Mon Sep 17 00:00:00 2001
From: Thomas Grainger <tagrain@gmail.com>
Date: Mon, 19 Dec 2016 11:09:59 +0000
Subject: [PATCH] Add traceback to unhandled promise rejections

---
 src/ng/q.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/ng/q.js b/src/ng/q.js
index 305626150d99..de396b2d7c02 100644
--- a/src/ng/q.js
+++ b/src/ng/q.js
@@ -381,7 +381,11 @@ function qFactory(nextTick, exceptionHandler, errorOnUnhandledRejections) {
       if (!toCheck.pur) {
         toCheck.pur = true;
         var errorMessage = 'Possibly unhandled rejection: ' + toDebugString(toCheck.value);
-        exceptionHandler(errorMessage);
+        if (toCheck.value instanceof Error) {
+          exceptionHandler(toCheck.value, errorMessage);
+        } else {
+          exceptionHandler(errorMessage);
+        }
       }
     }
   }