From e6dd7d76842f6681b20dbca57ccbcf16665e9e65 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Thu, 1 Mar 2018 20:17:39 +0300
Subject: [PATCH] Fix crash in item view refresh.

---
 .../history/view/history_view_list_widget.cpp          | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/Telegram/SourceFiles/history/view/history_view_list_widget.cpp b/Telegram/SourceFiles/history/view/history_view_list_widget.cpp
index 72ad0e8e0..418ee1a4c 100644
--- a/Telegram/SourceFiles/history/view/history_view_list_widget.cpp
+++ b/Telegram/SourceFiles/history/view/history_view_list_widget.cpp
@@ -2402,11 +2402,17 @@ void ListWidget::refreshItem(not_null<const Element*> view) {
 	const auto index = i - begin(_items);
 	if (index < int(_items.size())) {
 		const auto item = view->data();
-		_views.erase(item);
+		const auto was = [&]() -> std::unique_ptr<Element> {
+			if (const auto i = _views.find(item); i != end(_views)) {
+				auto result = std::move(i->second);
+				_views.erase(i);
+				return std::move(result);
+			}
+			return nullptr;
+		}();
 		const auto [i, ok] = _views.emplace(
 			item,
 			item->createView(this));
-		const auto was = view;
 		const auto now = i->second.get();
 		_items[index] = now;