Comment 2 for bug 551451

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Thierry Carrez (ttx) wrote :

Yes, this is wrong (VMBuilder/disk.py:332):

        if not os.path.exists(self.filename):
            logging.info('Not preallocated, so we create it.')
            if not self.filename:

If self.filename is "None", then os.path.exists(self.filename) fails with the above TypeError