[zfilipin@deploy1001 ~]$ cd release/make-wmf-branch/

[zfilipin@deploy1001 make-wmf-branch (master u=)]$ git pull
Already up-to-date.

[zfilipin@deploy1001 make-wmf-branch (master u=)]$ ./make-wmf-branch -n 1.33-wmf.8 -o master
...

[zfilipin@deploy1001 make-wmf-branch (master u=)]$ cd /srv/mediawiki-staging/

[zfilipin@deploy1001 mediawiki-staging (master u=)]$ scap prep 1.33-wmf.8 
13:36:31 WARNING  - Unhandled error:
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/scap/cli.py", line 325, in run
    app = Application.factory()
  File "/usr/lib/python2.7/dist-packages/scap/cli.py", line 287, in factory
    args, extra_args = parser.parse_known_args()
  File "/usr/lib/python2.7/argparse.py", line 1733, in parse_known_args
    namespace, args = self._parse_known_args(args, namespace)
  File "/usr/lib/python2.7/argparse.py", line 1942, in _parse_known_args
    stop_index = consume_positionals(start_index)
  File "/usr/lib/python2.7/argparse.py", line 1898, in consume_positionals
    take_action(action, args)
  File "/usr/lib/python2.7/argparse.py", line 1807, in take_action
    action(self, namespace, argument_values, option_string)
  File "/usr/lib/python2.7/argparse.py", line 1096, in __call__
    subnamespace, arg_strings = parser.parse_known_args(arg_strings, None)
  File "/usr/lib/python2.7/argparse.py", line 1733, in parse_known_args
    namespace, args = self._parse_known_args(args, namespace)
  File "/usr/lib/python2.7/argparse.py", line 1942, in _parse_known_args
    stop_index = consume_positionals(start_index)
  File "/usr/lib/python2.7/argparse.py", line 1898, in consume_positionals
    take_action(action, args)
  File "/usr/lib/python2.7/argparse.py", line 1791, in take_action
    argument_values = self._get_values(action, argument_strings)
  File "/usr/lib/python2.7/argparse.py", line 2231, in _get_values
    value = self._get_value(action, arg_string)
  File "/usr/lib/python2.7/argparse.py", line 2260, in _get_value
    result = type_func(arg_string)
  File "/srv/mediawiki-staging/scap/plugins/prep.py", line 20, in version_parser
    return re.match(r"(1\.\d\d\.\d+-wmf\.\d+|master)", ver).group(0)
AttributeError: 'NoneType' object has no attribute 'group'
13:36:31 ERROR    - scap failed: <AttributeError> 'NoneType' object has no attribute 'group'