From 29d93d348c1810c1dce78a8e80e7038ce112cecf Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Tue, 14 Feb 2023 10:00:10 +0400
Subject: [PATCH] Fix possible crash in migration tracking.

---
 .../SourceFiles/history/history_inner_widget.cpp    | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/Telegram/SourceFiles/history/history_inner_widget.cpp b/Telegram/SourceFiles/history/history_inner_widget.cpp
index 90dd68bc60..121b3084f7 100644
--- a/Telegram/SourceFiles/history/history_inner_widget.cpp
+++ b/Telegram/SourceFiles/history/history_inner_widget.cpp
@@ -3946,8 +3946,17 @@ void HistoryInner::notifyIsBotChanged() {
 }
 
 void HistoryInner::notifyMigrateUpdated() {
-	_migrated = _history->migrateFrom();
-	_migrated->translateTo(_history->translatedTo());
+	const auto migrated = _history->migrateFrom();
+	if (_migrated != migrated) {
+		if (_migrated) {
+			_migrated->delegateMixin()->setCurrent(nullptr);
+		}
+		_migrated = migrated;
+		if (_migrated) {
+			_migrated->delegateMixin()->setCurrent(this);
+			_migrated->translateTo(_history->translatedTo());
+		}
+	}
 }
 
 void HistoryInner::applyDragSelection() {