From 095185cfe795fc48a1710eabe9823324fa593fb1 Mon Sep 17 00:00:00 2001
From: vaxerski <43317083+vaxerski@users.noreply.github.com>
Date: Thu, 1 Sep 2022 10:15:55 +0200
Subject: [PATCH] guard parent in X11TransientFor

---
 src/Window.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Window.cpp b/src/Window.cpp
index e7abb6e1..bb0c52e1 100644
--- a/src/Window.cpp
+++ b/src/Window.cpp
@@ -228,7 +228,7 @@ CWindow* CWindow::X11TransientFor() {
 
     auto PPARENT = g_pCompositor->getWindowFromSurface(m_uSurface.xwayland->parent->surface);
 
-    while (PPARENT->m_uSurface.xwayland->parent) {
+    while (g_pCompositor->windowValidMapped(PPARENT) && PPARENT->m_uSurface.xwayland->parent) {
         PPARENT = g_pCompositor->getWindowFromSurface(PPARENT->m_uSurface.xwayland->parent->surface);
     }