QApplication::notify reimplementation

I know this is obviously not a new question but so far I have not been able to get it to work. So here is my code. It compiles but when I run it and execute a throw() within my MainWindow class, the throw() seems to get caught by the reimplemented notify, but the notify method seems to keep getting called over and over again until I eventually get a SIGABRT. What am I doing wrong?

Code:

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#include <QtGui/QApplication>
#include "mainwindow.h"
 
class App : public QApplication
{
    public:
 
    App(int& argc, char** argv):QApplication(argc,argv){}
    virtual ~App(){}
 
    virtual bool notify(QObject *receiver, QEvent *event)
    {
        try
        {
            return QApplication::notify(receiver, event);
        }
        catch(std::exception& e)
        {
            QMessageBox::information(0,"","Exception thrown",QMessageBox::Ok);
        }
        return false;
    }
};
 
int main(int argc, char *argv[])
{
    App a(argc, argv);
    MainWindow w;
 
    w.show();
    return a.exec();
}

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