From 8f02ca8ce958f1df9537bd9d15efd270100a8188 Mon Sep 17 00:00:00 2001
From: "J. Ryan Stinnett" <jryans@gmail.com>
Date: Wed, 16 Jun 2021 18:00:06 +0100
Subject: [PATCH] Stop requesting null next replies from the server

A recent change (47e007e08f9bedaf47cf59a63c9bd04219195d76) introduced a
regression where we failed to check whether a reply thread has a next reply.
This meant that we would end up sending `/context/undefined` requests to the
server for every reply thread on every room view.

Fixes https://github.com/vector-im/element-web/issues/17563
Regressed by https://github.com/matrix-org/matrix-react-sdk/pull/6079
---
 src/components/views/elements/ReplyThread.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/components/views/elements/ReplyThread.js b/src/components/views/elements/ReplyThread.js
index 81ed360b17..a9b24a306b 100644
--- a/src/components/views/elements/ReplyThread.js
+++ b/src/components/views/elements/ReplyThread.js
@@ -297,6 +297,7 @@ export default class ReplyThread extends React.Component {
     }
 
     async getEvent(eventId) {
+        if (!eventId) return null;
         const event = this.room.findEventById(eventId);
         if (event) return event;