From e0c74c9546941fb3ab842ebb2bc3e1825a32aae7 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Thu, 13 Jul 2017 17:44:45 +0300
Subject: [PATCH] Fix crash in handlePendingHistoryUpdate().

This method is called from InvokeQueued, so the auth session could
be destroyed already and should be checked before being accessed.
---
 Telegram/SourceFiles/facades.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Telegram/SourceFiles/facades.cpp b/Telegram/SourceFiles/facades.cpp
index 9b938504d..1a009cac7 100644
--- a/Telegram/SourceFiles/facades.cpp
+++ b/Telegram/SourceFiles/facades.cpp
@@ -361,6 +361,9 @@ void historyMuteUpdated(History *history) {
 }
 
 void handlePendingHistoryUpdate() {
+	if (!AuthSession::Exists()) {
+		return;
+	}
 	AuthSession::Current().data().pendingHistoryResize().notify(true);
 
 	for (auto item : base::take(Global::RefPendingRepaintItems())) {