From c522e047c6433f27767a039acdb9dd437e9b2e51 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Mon, 19 Nov 2018 14:03:18 +0400
Subject: [PATCH] Fix crash in support switches.

---
 Telegram/SourceFiles/history/history_widget.cpp | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/Telegram/SourceFiles/history/history_widget.cpp b/Telegram/SourceFiles/history/history_widget.cpp
index cba0b6e90..2ea66d0d4 100644
--- a/Telegram/SourceFiles/history/history_widget.cpp
+++ b/Telegram/SourceFiles/history/history_widget.cpp
@@ -3739,9 +3739,10 @@ void HistoryWidget::handleSupportSwitch(not_null<History*> updated) {
 		return;
 	}
 
-	crl::on_main(
-		this,
-		Support::GetSwitchMethod(Auth().settings().supportSwitch()));
+	const auto setting = Auth().settings().supportSwitch();
+	if (auto method = Support::GetSwitchMethod(setting)) {
+		crl::on_main(this, std::move(method));
+	}
 }
 
 void HistoryWidget::inlineBotResolveDone(