From 8b311c706c0b0aa8c8b105cb7597f638094117d3 Mon Sep 17 00:00:00 2001
From: Richard Lewis <rick@matrix.org>
Date: Tue, 13 Mar 2018 11:58:47 +0000
Subject: [PATCH] Null guard widget listener

---
 src/components/views/elements/AppTile.js | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/components/views/elements/AppTile.js b/src/components/views/elements/AppTile.js
index b29b2ae8a2..bedc9b09b9 100644
--- a/src/components/views/elements/AppTile.js
+++ b/src/components/views/elements/AppTile.js
@@ -170,8 +170,10 @@ export default class AppTile extends React.Component {
 
         // Widget postMessage listeners
         try {
-            this.widgetMessaging.stopListening();
-            this.widgetMessaging.removeEndpoint(this.props.id, this.props.url);
+            if (this.widgetMessaging) {
+                this.widgetMessaging.stopListening();
+                this.widgetMessaging.removeEndpoint(this.props.id, this.props.url);
+            }
         } catch (e) {
             console.error('Failed to stop listening for widgetMessaging events', e.message);
         }