From f2d84a7e3a323875c2e298094106a55ec21a3947 Mon Sep 17 00:00:00 2001
From: vaxerski <43317083+vaxerski@users.noreply.github.com>
Date: Thu, 1 Sep 2022 10:16:23 +0200
Subject: [PATCH] guard parent in X11TransientFor

---
 src/Window.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/Window.cpp b/src/Window.cpp
index bb0c52e1..7fe14869 100644
--- a/src/Window.cpp
+++ b/src/Window.cpp
@@ -232,6 +232,9 @@ CWindow* CWindow::X11TransientFor() {
         PPARENT = g_pCompositor->getWindowFromSurface(PPARENT->m_uSurface.xwayland->parent->surface);
     }
 
+    if (!g_pCompositor->windowValidMapped(PPARENT))
+        return nullptr;
+
     return PPARENT;
 }