Traceback (most recent call last):
  File "/usr/lib/ubiquity/ubiquity/frontend/gtk_ui.py", line 1035, in on_next_clicked
    self.dbfilter.ok_handler()
  File "/usr/lib/ubiquity/ubiquity/components/partman.py", line 1097, in ok_handler
    self.frontend.get_autopartition_choice()
  File "/usr/lib/ubiquity/ubiquity/frontend/gtk_ui.py", line 1662, in get_autopartition_choice
    return choice, '%d B' % self.action_bar.get_size()
TypeError: int argument required