From 4597dcd2214c565bc6125524e0d5689ecaaad410 Mon Sep 17 00:00:00 2001
From: David Baker <dave@matrix.org>
Date: Mon, 10 Jun 2019 15:27:59 +0100
Subject: [PATCH] Fix exception on logout

Don't try to unregister if we never registered
---
 src/components/structures/EmbeddedPage.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/components/structures/EmbeddedPage.js b/src/components/structures/EmbeddedPage.js
index e3c197e1db..ecc01a443d 100644
--- a/src/components/structures/EmbeddedPage.js
+++ b/src/components/structures/EmbeddedPage.js
@@ -46,6 +46,8 @@ export default class EmbeddedPage extends React.PureComponent {
     constructor(props) {
         super(props);
 
+        this._dispatcherRef = null;
+
         this.state = {
             page: '',
         };
@@ -90,7 +92,7 @@ export default class EmbeddedPage extends React.PureComponent {
 
     componentWillUnmount() {
         this._unmounted = true;
-        dis.unregister(this._dispatcherRef);
+        if (this._dispatcherRef !== null) dis.unregister(this._dispatcherRef);
     }
 
     onAction = (payload) => {