From c62b39e287a41a202a87e8f180e41ba425d80c13 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Fri, 17 Jul 2020 08:32:51 +0400
Subject: [PATCH] Fix possible crash in call top bar hiding.

---
 Telegram/SourceFiles/mainwidget.cpp | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/Telegram/SourceFiles/mainwidget.cpp b/Telegram/SourceFiles/mainwidget.cpp
index fb50ffd1d5..6cf9d13fd9 100644
--- a/Telegram/SourceFiles/mainwidget.cpp
+++ b/Telegram/SourceFiles/mainwidget.cpp
@@ -2090,7 +2090,12 @@ void MainWidget::showAll() {
 	}
 	if (_callTopBar) {
 		_callTopBar->setVisible(true);
-		_callTopBarHeight = _callTopBar->height();
+
+		// show() could've send pending resize event that would update
+		// the height value and destroy the top bar if it was hiding.
+		if (_callTopBar) {
+			_callTopBarHeight = _callTopBar->height();
+		}
 	}
 	updateControlsGeometry();
 	floatPlayerCheckVisibility();
@@ -2172,9 +2177,9 @@ void MainWidget::updateControlsGeometry() {
 		const auto shadowTop = _controller->window().verticalShadowTop();
 		const auto shadowHeight = height() - shadowTop;
 		_sideShadow->setGeometryToLeft(
-			dialogsWidth, 
+			dialogsWidth,
 			shadowTop,
-			st::lineWidth, 
+			st::lineWidth,
 			shadowHeight);
 		if (_thirdShadow) {
 			_thirdShadow->setGeometryToLeft(