Added nullptr guard to avoid exceptions

knockout · Mar 29, 2017 · 072960f · 072960f
1 parent 89933a1
commit 072960f
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/subscribables/observableArray.changeTracking.js b/src/subscribables/observableArray.changeTracking.js
@@ -36,7 +36,8 @@ ko.extenders['trackArrayChanges'] = function(target, options) {
                 target['notifySubscribers'] = underlyingNotifySubscribersFunction;
                 underlyingNotifySubscribersFunction = undefined;
             }
-            arrayChangeSubscription.dispose();
+            if (arrayChangeSubscription)
+	        arrayChangeSubscription.dispose();
             arrayChangeSubscription = null;
             trackingChanges = false;
         }