From 45f0f36914bd1b869d9ad25fe74cb9df8e4a9945 Mon Sep 17 00:00:00 2001
From: Volker Braun <vbraun.name@gmail.com>
Date: Mon, 26 Feb 2018 09:38:03 +0100
Subject: [PATCH] fix($q): allow third-party promises

For testing, it can be useful to run with other promise
implementations like Bluebird.js + angular-bluebird-promises. This
broke in angularjs 1.6 with a "TypeError: Cannot set property 'pur' of
undefined".

Closes #16164
---
 src/ng/q.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/ng/q.js b/src/ng/q.js
index 3bfc61386295..a40ab4b680b1 100644
--- a/src/ng/q.js
+++ b/src/ng/q.js
@@ -677,10 +677,11 @@ function qFactory(nextTick, exceptionHandler, errorOnUnhandledRejections) {
 }
 
 function isStateExceptionHandled(state) {
+  if (!state) return true;
   return !!state.pur;
 }
 function markQStateExceptionHandled(state) {
-  state.pur = true;
+  if (state) state.pur = true;
 }
 function markQExceptionHandled(q) {
   markQStateExceptionHandled(q.$$state);