From a69304fd2547961f684f249a7ea590bbf604f736 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Thu, 13 Jul 2017 17:57:25 +0300
Subject: [PATCH] Fix crash in forwarding messages.

HistoryHider holds pointers to items, so it should watch for
the history items being removed and remove the pointers.
---
 Telegram/SourceFiles/history/history_widget.cpp | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/Telegram/SourceFiles/history/history_widget.cpp b/Telegram/SourceFiles/history/history_widget.cpp
index 0775c4a715..949781dda6 100644
--- a/Telegram/SourceFiles/history/history_widget.cpp
+++ b/Telegram/SourceFiles/history/history_widget.cpp
@@ -208,6 +208,19 @@ HistoryHider::HistoryHider(MainWidget *parent, const QString &url, const QString
 
 void HistoryHider::init() {
 	subscribe(Lang::Current().updated(), [this] { refreshLang(); });
+	if (!_forwardItems.empty()) {
+		subscribe(Global::RefItemRemoved(), [this](HistoryItem *item) {
+			for (auto i = _forwardItems.begin(); i != _forwardItems.end(); ++i) {
+				if (i->get() == item) {
+					i = _forwardItems.erase(i);
+					break;
+				}
+			}
+			if (_forwardItems.empty()) {
+				startHide();
+			}
+		});
+	}
 	connect(_send, SIGNAL(clicked()), this, SLOT(forward()));
 	connect(_cancel, SIGNAL(clicked()), this, SLOT(startHide()));
 	subscribe(Global::RefPeerChooseCancel(), [this] { startHide(); });