From 566f64d436cab44353b9b566a3395c356f4bc592 Mon Sep 17 00:00:00 2001
From: Gareth Oates <gareth.oates@itslearning.com>
Date: Fri, 16 Feb 2018 10:58:18 +0100
Subject: [PATCH] this._changeHandlers was undefined when calling cancel()

---
 store.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/store.js b/store.js
index 63a99cca05..6923455113 100644
--- a/store.js
+++ b/store.js
@@ -115,7 +115,7 @@ assign(Store.prototype, {
 			cancel: function() {
 				var index = this._changeHandlers.indexOf(callback);
 				if (~index) this._changeHandlers.splice(index, 1);
-			}
+			}.bind(this)
 		};
 	},
 
@@ -163,4 +163,4 @@ assign(Store.prototype, {
 	}
 });
 
-export { Store };
\ No newline at end of file
+export { Store };