Destructor not being called

[spirit]

Why would MainWindow's dtor have anything to do with it ?
... I see it now .....
in the ctor, it needed:

setAttribute(Qt::WA_DeleteOnClose);

setAttribute(Qt::WA_DeleteOnClose);

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Thanks for the kick !

because, if you remeber, when you pass a parent into ctor of objects which subclassed from QObject Qt will delete all children by itself when a parent's dtor is being called. but if you don't pass a parent in ctor of objects then you have to delete these objectcs by yourself.