From 575b6740816c49c8fbbfd8f63bd5bed0a0fdbb0c Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Tue, 12 May 2020 14:06:25 +0200
Subject: [PATCH] LibGUI: Add missing window() null check when widget's child
 is removed

Before notifying our window that a child was removed, we should first
check that we actually have a window! :^)
---
 Libraries/LibGUI/Widget.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Libraries/LibGUI/Widget.cpp b/Libraries/LibGUI/Widget.cpp
index 67be0bfd0a..666ca70ed4 100644
--- a/Libraries/LibGUI/Widget.cpp
+++ b/Libraries/LibGUI/Widget.cpp
@@ -123,7 +123,7 @@ void Widget::child_event(Core::ChildEvent& event)
             else
                 invalidate_layout();
         }
-        if (event.child() && Core::is<Widget>(*event.child()))
+        if (window() && event.child() && Core::is<Widget>(*event.child()))
             window()->did_remove_widget({}, Core::to<Widget>(*event.child()));
         update();
     }