From 46dfde881ab2a45d945afe7bb84aab10b2d25bf7 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Fri, 11 Jun 2021 19:19:50 +0400
Subject: [PATCH] Fix crash in screencast error handling.

---
 Telegram/SourceFiles/calls/group/calls_group_call.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Telegram/SourceFiles/calls/group/calls_group_call.cpp b/Telegram/SourceFiles/calls/group/calls_group_call.cpp
index c67eadc99..bad608855 100644
--- a/Telegram/SourceFiles/calls/group/calls_group_call.cpp
+++ b/Telegram/SourceFiles/calls/group/calls_group_call.cpp
@@ -1122,6 +1122,10 @@ void GroupCall::markTrackShown(const VideoEndpoint &endpoint, bool shown) {
 }
 
 void GroupCall::markTrackPaused(const VideoEndpoint &endpoint, bool paused) {
+	if (!endpoint) {
+		return;
+	}
+
 	const auto i = _activeVideoTracks.find(endpoint);
 	Assert(i != end(_activeVideoTracks));