Qt 6.4 application crash in debug with QML Dialog component

Volodymyr Mudryk

Hi

Application crash if add Dialog component and start debugging with QML debug. If just run (not debug, of off QML debugging) it works fine.
Does anybody can reproduce it too?
Is there any workaround or fix?

Project to reproduce:
Ubuntu 20.04.4
Qt Creator 8.0.0
Qt 6.4

pro file:

QT += quick

SOURCES += \
        main.cpp

resources.files = main.qml 
resources.prefix = /$${TARGET}
RESOURCES += resources

# Additional import path used to resolve QML modules in Qt Creator's code model
QML_IMPORT_PATH =

# Additional import path used to resolve QML modules just for Qt Quick Designer
QML_DESIGNER_IMPORT_PATH =

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

main.cpp:

#include <QQmlApplicationEngine>


int main(int argc, char *argv[])
{
    QGuiApplication app(argc, argv);

    QQmlApplicationEngine engine;
    const QUrl url(u"qrc:/untitled11/main.qml"_qs);
    QObject::connect(&engine, &QQmlApplicationEngine::objectCreated,
                     &app, [url](QObject *obj, const QUrl &objUrl) {
        if (!obj && url == objUrl)
            QCoreApplication::exit(-1);
    }, Qt::QueuedConnection);
    engine.load(url);

    return app.exec();
}

main.qml:

import QtQuick
import QtQuick.Controls

Window {
    id: window
    width: 640
    height: 480
    visible: true
    title: qsTr("Hello World")

    Dialog {}
}

Volodymyr Mudryk

Workaround: to off "Show QML object tree" in Preferences -> Debuger -> General
Now I can run and debug.