From eaf4c5b99e51327af03619af06f64fcd35198f1b Mon Sep 17 00:00:00 2001
From: Robin Ward <robin.ward@gmail.com>
Date: Fri, 27 May 2016 14:59:48 -0400
Subject: [PATCH] FIX: Don't raise an error when the element is missing

---
 .../javascripts/discourse/components/topic-progress.js.es6       | 1 +
 1 file changed, 1 insertion(+)

diff --git a/app/assets/javascripts/discourse/components/topic-progress.js.es6 b/app/assets/javascripts/discourse/components/topic-progress.js.es6
index dfd5050195a..51b6aeb54f6 100644
--- a/app/assets/javascripts/discourse/components/topic-progress.js.es6
+++ b/app/assets/javascripts/discourse/components/topic-progress.js.es6
@@ -94,6 +94,7 @@ export default Ember.Component.extend({
   },
 
   _updateProgressBar() {
+    if (this.isDestroyed || this.isDestroying) { return; }
     if (this.get('hidden')) { return; }
 
     const $topicProgress = this.$('#topic-progress');