From 25ba4c5f7124d40fd5d83cddba30b1479f64dc0c Mon Sep 17 00:00:00 2001
From: David Baker <dave@matrix.org>
Date: Fri, 22 Nov 2019 13:11:36 +0000
Subject: [PATCH] Fix read markers

init code needs to be a constructor or its run too late
---
 src/components/structures/MessagePanel.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/components/structures/MessagePanel.js b/src/components/structures/MessagePanel.js
index bd5630ab12..22be35db60 100644
--- a/src/components/structures/MessagePanel.js
+++ b/src/components/structures/MessagePanel.js
@@ -109,7 +109,8 @@ export default class MessagePanel extends React.Component {
         showReactions: PropTypes.bool,
     };
 
-    componentDidMount() {
+    constructor() {
+        super();
         // the event after which we put a visible unread marker on the last
         // render cycle; null if readMarkerVisible was false or the RM was
         // suppressed (eg because it was at the end of the timeline)
@@ -165,6 +166,10 @@ export default class MessagePanel extends React.Component {
         this._showHiddenEventsInTimeline =
             SettingsStore.getValue("showHiddenEventsInTimeline");
 
+        this._isMounted = false;
+    }
+
+    componentDidMount() {
         this._isMounted = true;
     }