From ee0f66d7468de582fc85c464dbcb0b5c6ae1f25b Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Fri, 6 Sep 2019 10:33:05 +0300
Subject: [PATCH] Fix crash in history clear while sending messages.

Don't remove messages that are currently being sent from locals.
---
 Telegram/SourceFiles/history/history.cpp | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/Telegram/SourceFiles/history/history.cpp b/Telegram/SourceFiles/history/history.cpp
index 326338e348..0df87b3885 100644
--- a/Telegram/SourceFiles/history/history.cpp
+++ b/Telegram/SourceFiles/history/history.cpp
@@ -3060,8 +3060,16 @@ void History::clear(ClearType type) {
 		lastKeyboardInited = false;
 		_loadedAtTop = _loadedAtBottom = false;
 	} else {
+		// Leave the 'sending' messages in local messages.
+		for (auto i = begin(_localMessages); i != end(_localMessages);) {
+			const auto item = *i;
+			if (!item->isSending()) {
+				i = _localMessages.erase(i);
+			} else {
+				++i;
+			}
+		}
 		_notifications.clear();
-		_localMessages.clear();
 		owner().notifyHistoryCleared(this);
 		if (unreadCountKnown()) {
 			setUnreadCount(0);