Change in behaviour of WA_QuitOnClose when WA_DontShowOnScreen is set

    {
        int argc = 0;
        QApplication app(argc, 0, QApplication::GuiServer);
        QTimer timer;
        timer.setInterval(100);

        QSignalSpy spy(&app, SIGNAL(aboutToQuit()));
        QSignalSpy spy2(&timer, SIGNAL(timeout()));

        QPointer<QMainWindow> mainWindow = new QMainWindow;
        QPointer<QWidget> invisibleTopLevelWidget = new QWidget;
        invisibleTopLevelWidget->setAttribute(Qt::WA_DontShowOnScreen);

        QVERIFY(app.quitOnLastWindowClosed());
        QVERIFY(mainWindow->testAttribute(Qt::WA_QuitOnClose));
        QVERIFY(invisibleTopLevelWidget->testAttribute(Qt::WA_QuitOnClose));
        QVERIFY(invisibleTopLevelWidget->testAttribute(Qt::WA_DontShowOnScreen));

        mainWindow->show();
        invisibleTopLevelWidget->show();

        timer.start();
        QTimer::singleShot(1000, mainWindow, SLOT(close())); // This should quit the application
        QTimer::singleShot(2000, &app, SLOT(quit()));        // This makes sure we quit even if it didn't

        app.exec();

        QCOMPARE(spy.count(), 1);
        int count = spy2.count();
        QVERIFY(spy2.count() < 15);      // Should be around 10 if closing caused the quit
    }