From 686b20f4ba5b8c07421a825ba63e763ee1bf8982 Mon Sep 17 00:00:00 2001
From: Xaver Hugl <xaver.hugl@gmail.com>
Date: Thu, 21 Nov 2024 14:39:24 +0000
Subject: [PATCH] layers: add null check

This fixes https://crash-reports.kde.org/organizations/kde/issues/96985


(cherry picked from commit 0a4e7d8908e056084b943b962f28f99eebd3561b)

Co-authored-by: Xaver Hugl <xaver.hugl@gmail.com>
---
 src/layers.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/layers.cpp b/src/layers.cpp
index 60a52ad682..42d8ed498c 100644
--- a/src/layers.cpp
+++ b/src/layers.cpp
@@ -680,6 +680,9 @@ void Workspace::updateXStackingOrder()
 {
     // we use our stacking order for managed windows, but X's for override-redirect windows
     Xcb::Tree tree(kwinApp()->x11RootWindow());
+    if (tree.isNull()) {
+        return;
+    }
     xcb_window_t *windows = tree.children();
 
     const auto count = tree.data()->children_len;