From 5fe1175602d43a96147d25a7f5d30da16234d1e3 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Fri, 30 Jun 2017 13:46:41 +0300
Subject: [PATCH] Fix crash when message for forward is deleted.

The messages prepared for forwarding are not a map (MsgId -> item),
but just a map (random int -> item), so we need to loop over them.
---
 Telegram/SourceFiles/history/history_widget.cpp | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/Telegram/SourceFiles/history/history_widget.cpp b/Telegram/SourceFiles/history/history_widget.cpp
index 2e359c89e4..ecdb729626 100644
--- a/Telegram/SourceFiles/history/history_widget.cpp
+++ b/Telegram/SourceFiles/history/history_widget.cpp
@@ -6414,14 +6414,13 @@ void HistoryWidget::updateForwardingItemRemovedSubscription() {
 		_forwardingItemRemovedSubscription = 0;
 	} else if (!_forwardingItemRemovedSubscription) {
 		_forwardingItemRemovedSubscription = subscribe(Global::RefItemRemoved(), [this](HistoryItem *item) {
-			auto i = _toForward.find(item->id);
-			if (i == _toForward.cend() || i.value() != item) {
-				i = _toForward.find(item->id - ServerMaxMsgId);
-			}
-			if (i != _toForward.cend() && i.value() == item) {
-				_toForward.erase(i);
-				updateForwardingItemRemovedSubscription();
-				updateForwardingTexts();
+			for (auto i = _toForward.begin(); i != _toForward.end(); ++i) {
+				if (i->get() == item) {
+					i = _toForward.erase(i);
+					updateForwardingItemRemovedSubscription();
+					updateForwardingTexts();
+					break;
+				}
 			}
 		});
 	}