Hi,

the following code will crash python (2.7?) while calling QMenu constructor.
But only if super()(QtGui.QMainWindow.__init__(self)) isn't called before.

# Python Version:
Python 2.7.1 (r271:86832, Nov 27 2010, 18:30:46) [MSC v.1500 32 bit (Intel)]

# Code
import sys
from PySide import QtGui, QtCore

def main():
    app = QtGui.QApplication(sys.argv)
    w = MainWindow()
    w.show()
    sys.exit(app.exec_())


class MainWindow(QtGui.QMainWindow):
    def __init__(self, *args):
        #QtGui.QMainWindow.__init__(self)
        self._menu = QtGui.QMenu(self.dontexist)

if __name__ == "__main__":
    sys.exit(main())
# End Code

thanks for your work!