NameError: global name 'result' is not defined

Got this traceback when running "bzr branch ubuntu:natty/updates/smartpm":

 Traceback (most recent call last):
   File "/usr/lib/pymodules/python2.6/bzrlib/commands.py", line 946, in exception_to_return_code
     return the_callable(*args, **kwargs)
   File "/usr/lib/pymodules/python2.6/bzrlib/commands.py", line 1150, in run_bzr
     ret = run(*run_argv)
   File "/usr/lib/pymodules/python2.6/bzrlib/commands.py", line 699, in run_argv_aliases
     return self.run(**all_cmd_args)
   File "/usr/lib/pymodules/python2.6/bzrlib/commands.py", line 721, in run
     return self._operation.run_simple(*args, **kwargs)
   File "/usr/lib/pymodules/python2.6/bzrlib/cleanup.py", line 135, in run_simple
     self.cleanups, self.func, *args, **kwargs)
   File "/usr/lib/pymodules/python2.6/bzrlib/cleanup.py", line 165, in _do_with_cleanups
     result = func(*args, **kwargs)
   File "/usr/lib/pymodules/python2.6/bzrlib/builtins.py", line 1263, in run
     from_location)
   File "/usr/lib/pymodules/python2.6/bzrlib/bzrdir.py", line 918, in open_tree_or_branch
     bzrdir = klass.open(location)
   File "/usr/lib/pymodules/python2.6/bzrlib/bzrdir.py", line 827, in open
     t = _mod_transport.get_transport(base, possible_transports)
   File "/usr/lib/pymodules/python2.6/bzrlib/transport/__init__.py", line 1602, in get_transport
     base = directories.dereference(base)
   File "/usr/lib/pymodules/python2.6/bzrlib/directory_service.py", line 63, in dereference
     return service().look_up(name, url)
   File "/usr/lib/pymodules/python2.6/bzrlib/plugins/launchpad/lp_directory.py", line 66, in look_up
     return self._resolve(url)
   File "/usr/lib/pymodules/python2.6/bzrlib/plugins/launchpad/lp_directory.py", line 157, in _resolve
     url, path = self._update_url_scheme(url)
   File "/usr/lib/pymodules/python2.6/bzrlib/plugins/launchpad/lp_directory.py", line 133, in _update_url_scheme
     raise errors.InvalidURL('Bad path: %s' % result.path)
 NameError: global name 'result' is not defined

Crash file attached (apport wouldn't accept it, saying bzr is not a genuine ubuntu package).