From 95d8bb01ac3867bc6f19b59dc47d1b2cd729bf6e Mon Sep 17 00:00:00 2001
From: 23rd <23rd@vivaldi.net>
Date: Thu, 12 Mar 2020 12:12:03 +0300
Subject: [PATCH] Guarded paletteChanged handling in touchbar's
 PinnedDialogButton.

---
 Telegram/SourceFiles/platform/mac/mac_touchbar.mm | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Telegram/SourceFiles/platform/mac/mac_touchbar.mm b/Telegram/SourceFiles/platform/mac/mac_touchbar.mm
index 4758605c4..e4b5f70ce 100644
--- a/Telegram/SourceFiles/platform/mac/mac_touchbar.mm
+++ b/Telegram/SourceFiles/platform/mac/mac_touchbar.mm
@@ -481,6 +481,8 @@ void AppendEmojiPacks(std::vector<PickerScrubberItem> &to) {
 @implementation PinnedDialogButton {
 	rpl::lifetime _lifetime;
 	rpl::lifetime _peerChangedLifetime;
+	base::has_weak_ptr _guard;
+
 	bool isWaitingUserpicLoad;
 }
 
@@ -518,7 +520,7 @@ void AppendEmojiPacks(std::vector<PickerScrubberItem> &to) {
 	) | rpl::filter([](const Window::Theme::BackgroundUpdate &update) {
 		return update.paletteChanged();
 	}) | rpl::start_with_next([=] {
-		crl::on_main([=] {
+		crl::on_main(&_guard, [=] {
 			if (_number <= kSavedMessagesId || UseEmptyUserpic(_peer)) {
 				[self updateUserpic];
 			} else if (_peer