Crash on Windows

I was looking into QTBUG-115703 :  QtWebEngine 6.6.0 crashes on Windows.

There are multiple issues reported in the bug, and this one specific to Debug mode.

The user compiled Qt modules in Release mode and has a sample application (e.g., a simple browser).

They compiled the sample application in Debug mode, and when running the application, it crashes.

The crash is from ~QArraDataPointer()

I could replicate the issue same using the following code. Sample project is attached for reference.

====================================================

void funcString()

{

    QStringList args;

    args.append("abc");

}

int main(int argc, char *argv[])

{

    QApplication a(argc, argv);

    MainWindow w;

    w.show();

    funcString();

    return a.exec();

}

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