From 1a628e82cc2637e1b162e7dbf3f8bf62068fe544 Mon Sep 17 00:00:00 2001
From: Wladimir Leuschner <wladimir.leuschner@qt.io>
Date: Mon, 24 Jul 2023 13:57:54 +0200
Subject: [PATCH] Return 0 in QWindow::winId in case of failed platform window
 creation
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Task-number: QTBUG-114613
Change-Id: I93184d95f8f448ab115570a18cdb720449a0637d
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
(cherry picked from commit 63824363ab4844816a4ea16a4d315c74ae21344a)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 src/gui/kernel/qwindow.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/gui/kernel/qwindow.cpp b/src/gui/kernel/qwindow.cpp
index b59c32ac343..1e30e57baf2 100644
--- a/src/gui/kernel/qwindow.cpp
+++ b/src/gui/kernel/qwindow.cpp
@@ -687,6 +687,7 @@ void QWindow::create()
     Returns the window's platform id.
 
     \note This function will cause the platform window to be created if it is not already.
+    Returns 0, if the platform window creation failed.
 
     For platforms where this id might be useful, the value returned
     will uniquely represent the window inside the corresponding screen.
@@ -700,6 +701,9 @@ WId QWindow::winId() const
     if (!d->platformWindow)
         const_cast<QWindow *>(this)->create();
 
+    if (!d->platformWindow)
+        return 0;
+
     return d->platformWindow->winId();
 }