Android: Top-level modal dialog hangs on EGL when no event loop is running

#include <QtGui>
#include <QtWidgets>

class MyDialog: public QDialog
{
public:
    MyDialog()
    {
        createWidgets();
    }

private:
    void createWidgets()
    {
        QVBoxLayout *layout = new QVBoxLayout(this);
        QPushButton *button = new QPushButton("Test", this);
        connect(button, SIGNAL(clicked()), this, SLOT(accept()));
        layout->addWidget(button);
    }
};

int main(int argc, char **argv)
{
    QApplication app(argc, argv);

    MyDialog dialog;
    dialog.exec();
}

int main(int argc, char **argv)
{
    QApplication app(argc, argv);

    MyDialog dialog;
    QTimer::singleShot(0, &dialog, SLOT(exec()));
    QObject::connect(&dialog, SIGNAL(accepted()), QApplication::instance(), SLOT(quit()));

    return app.exec();
}