bzr bug

[Grinchishin V.]

bzr: ERROR: exceptions.UnboundLocalError: local variable 'b' referenced
before assignment

Traceback (most recent call last):
  File "C:\usr\Python\Lib\site-packages\bzrlib\commands.py", line 800,
in run_bzr_catch_errors
    return run_bzr(argv)
  File "C:\usr\Python\Lib\site-packages\bzrlib\commands.py", line 758,
in run_bzr
    ret = run(*run_argv)
  File "C:\usr\Python\Lib\site-packages\bzrlib\commands.py", line 492,
in run_argv_aliases
    return self.run(**all_cmd_args)
  File "C:\usr\Python\Lib\site-packages\bzrlib\commands.py", line 768,
in ignore_pipe
    result = func(*args, **kwargs)
  File "C:\usr\Python\Lib\site-packages\bzrlib\builtins.py", line 2123,
in run
    tree = b.basis_tree()
UnboundLocalError: local variable 'b' referenced before assignment

bzr 0.91.0 on python 2.5.1.final.0 (win32)
arguments: ['C:\\usr\\Python\\Scripts\\bzr', 'cat', '-r75',
'/doc/plan_extra.doc']