From 763d56a0bc26dd742666302adac66ea0ebd57181 Mon Sep 17 00:00:00 2001
From: Danmei Chen <danmei.chen@belledonne-communications.com>
Date: Mon, 30 Mar 2020 10:38:57 +0200
Subject: [PATCH] try to fix crash: linphone_chat_room_get_capabilities

---
 Classes/ChatConversationView.m | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Classes/ChatConversationView.m b/Classes/ChatConversationView.m
index c1534faba..35be6b99d 100644
--- a/Classes/ChatConversationView.m
+++ b/Classes/ChatConversationView.m
@@ -205,6 +205,7 @@ static UICompositeViewDescription *compositeDescription = nil;
 	if (_chatRoom && _chatRoomCbs) {
 		linphone_chat_room_remove_callbacks(_chatRoom, _chatRoomCbs);
 		_chatRoomCbs = NULL;
+		_chatRoom = NULL;
 	}
 
 	[_messageField resignFirstResponder];
@@ -218,6 +219,7 @@ static UICompositeViewDescription *compositeDescription = nil;
 - (void)didEnterBackground:(NSNotification *)notif {
     linphone_chat_room_remove_callbacks(_chatRoom, _chatRoomCbs);
     _chatRoomCbs = NULL;
+	_chatRoom = NULL;
 }
 
 - (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation {