This works correctly on Python 3.4.

On Python 2.7, argparse seems to completely and silently ignore arguments in some conditions, for instance this setup will cause --verbose to be ignored on the main parser:

    options = argparse.ArgumentParser(add_help=False)
    options.add_argument('-v', '--verbose', action='store_true')
    parser = argparse.ArgumentParser(parents=[options])
    subparsers = parser.add_subparsers()
    parser_cmd = subparsers.add_parser('cmd', parents=[options])

Full runnable example here: http://paste.pound-python.org/show/XfVVhdJHSPISXLP1lASd/

Might or might not be related to #9351, workarounds welcome.