From bbf45593cbd53269e027f74b09280a70b2755928 Mon Sep 17 00:00:00 2001
From: Anders Kaseorg <anders@zulipchat.com>
Date: Tue, 9 Jul 2019 17:15:07 -0700
Subject: [PATCH] blueslip: Ignore error events with null error.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Chrome generates these to report things like “ResizeObserver loop
limit exceeded” (which is harmless).

Signed-off-by: Anders Kaseorg <anders@zulipchat.com>
---
 static/js/blueslip.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/static/js/blueslip.js b/static/js/blueslip.js
index 560b7043e4..8bc68ab9ec 100644
--- a/static/js/blueslip.js
+++ b/static/js/blueslip.js
@@ -219,7 +219,7 @@ exports.exception_msg = function blueslip_exception_msg(ex) {
 
 $(window).on('error', function (event) {
     var ex = event.originalEvent.error;
-    if (ex instanceof BlueslipError) {
+    if (!ex || ex instanceof BlueslipError) {
         return;
     }
     var message = exports.exception_msg(ex);