From a392b5750aa776fbc8ba27736d78901ddf0db29d Mon Sep 17 00:00:00 2001
From: Dannon Baker <dannon.baker@gmail.com>
Date: Fri, 2 Feb 2018 09:01:35 -0500
Subject: [PATCH] Ensure jobStateSummariesCollection exists; events can fire
 during deletion actions causing this event to fail

---
 client/galaxy/scripts/mvc/history/history-contents.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/client/galaxy/scripts/mvc/history/history-contents.js b/client/galaxy/scripts/mvc/history/history-contents.js
index 46c46f7fec0..7dd48a16313 100644
--- a/client/galaxy/scripts/mvc/history/history-contents.js
+++ b/client/galaxy/scripts/mvc/history/history-contents.js
@@ -72,7 +72,7 @@ var HistoryContents = _super.extend(BASE_MVC.LoggableMixin).extend({
             if (historyContent.attributes.history_content_type === "dataset_collection") {
                 var jobSourceType = historyContent.attributes.job_source_type;
                 var jobSourceId = historyContent.attributes.job_source_id;
-                if (jobSourceType) {
+                if (jobSourceType && this.jobStateSummariesCollection) {
                     this.jobStateSummariesCollection.add({
                         id: jobSourceId,
                         model: jobSourceType,