From 98440889641fcd7d049921146984ca5ec3b957b3 Mon Sep 17 00:00:00 2001
From: Tom <tomut@yahoo.com>
Date: Wed, 15 Jul 2020 19:49:57 -0600
Subject: [PATCH] LibGUI: Clear previous main widget's window

---
 Libraries/LibGUI/Window.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Libraries/LibGUI/Window.cpp b/Libraries/LibGUI/Window.cpp
index b9a1c9e5cc..5c5fff730b 100644
--- a/Libraries/LibGUI/Window.cpp
+++ b/Libraries/LibGUI/Window.cpp
@@ -460,8 +460,10 @@ void Window::set_main_widget(Widget* widget)
 {
     if (m_main_widget == widget)
         return;
-    if (m_main_widget)
+    if (m_main_widget) {
+        m_main_widget->set_window(nullptr);
         remove_child(*m_main_widget);
+    }
     m_main_widget = widget;
     if (m_main_widget) {
         add_child(*widget);