From 97a40252dcec831158c29c86bc84000f9546173d Mon Sep 17 00:00:00 2001
From: Brendan Dahl <brendan.dahl@gmail.com>
Date: Tue, 6 Aug 2013 11:40:35 -0700
Subject: [PATCH] Dump the stack with unhandled rejections.

---
 src/util.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/util.js b/src/util.js
index a1d7e2b98..c7a84bb60 100644
--- a/src/util.js
+++ b/src/util.js
@@ -770,8 +770,12 @@ var Promise = PDFJS.Promise = (function PromiseClosure() {
         var now = Date.now();
         for (var i = 0; i < this.unhandledRejections.length; i++) {
           if (now - this.unhandledRejections[i].time > REJECTION_TIMEOUT) {
-            warn('Unhandled rejection: ' +
-                 this.unhandledRejections[i].promise._value);
+            var unhandled = this.unhandledRejections[i].promise._value;
+            var msg = 'Unhandled rejection: ' + unhandled;
+            if (unhandled.stack) {
+              msg += '\n' + unhandled.stack;
+            }
+            warn(msg);
             this.unhandledRejections.splice(i);
             i--;
           }