QCoreApplication quit not working

I've created a console program. For debugging purposes, I need the program to quit if some conditions are not met. Here is an example:

if (VDD.isEmpty() || GND.isEmpty()){
    qWarning() << "VDD and GND must NOT be empty";
    QCoreApplication::quit();
    qWarning() << "After the quit";
}

As I understand it, the output after quit() should not be printed.

The main() function of my program is something like this:

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    // Do stuff that calls the code above

    return a.exec();
}

Can anyone tell why this is happening?

For the time being I'm using abort(), but I would rather use quit().