From cc8f4aa24f797f48b31cfdce220f5bc1d6585ae5 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Fri, 12 Apr 2019 17:06:33 +0400
Subject: [PATCH] Fix crash in history clear.

---
 Telegram/SourceFiles/history/history.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Telegram/SourceFiles/history/history.cpp b/Telegram/SourceFiles/history/history.cpp
index 1b7c63298f..89935fc5dd 100644
--- a/Telegram/SourceFiles/history/history.cpp
+++ b/Telegram/SourceFiles/history/history.cpp
@@ -2947,8 +2947,8 @@ void History::clear(ClearType type) {
 		changeUnreadCount(-unreadCount());
 		if (type == ClearType::DeleteChat) {
 			setLastMessage(nullptr);
-		} else {
-			if (_lastMessage && IsServerMsgId((*_lastMessage)->id)) {
+		} else if (_lastMessage && *_lastMessage) {
+			if (IsServerMsgId((*_lastMessage)->id)) {
 				(*_lastMessage)->applyEditionToHistoryCleared();
 			} else {
 				_lastMessage = std::nullopt;