#include <QCoreApplication>
#include <QEventLoop>

class MyClass: public QObject
{
    Q_OBJECT
protected slots:
    void run()
    {
        QObject *obj = new QObject;
        obj->deleteLater();

        QEventLoop loop;
        loop.exec();
    }
};

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

    MyClass mc;
    QMetaObject::invokeMethod(&mc, "run", Qt::QueuedConnection);

    app.exec();
}

#include "main2.moc"