bzr: ERROR: exceptions.AttributeError: 'NoneType' object has no attribute 'exists'

[LI Daobing]

None
bzr: ERROR: exceptions.AttributeError: 'NoneType' object has no
attribute 'exists'

Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line
650, in run_bzr_catch_errors
    return run_bzr(argv)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line
612, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line
304, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/bzrtools/__init__.py",
line 631, in run
    reuse_history_list)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/bzrtools/baz_import.py",
line 771, in baz_import_branch
    reuse_history_from=reuse_history_list)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/bzrtools/baz_import.py",
line 414, in import_version
    reuse_history_from)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/bzrtools/baz_import.py",
line 304, in get_remaining_revisions
    ancestors = version_ancestry(version)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/bzrtools/baz_import.py",
line 242, in version_ancestry
    if not version.exists():
AttributeError: 'NoneType' object has no attribute 'exists'

bzr 0.14.0 on python 2.5.0.final.0 (linux2)
arguments: ['/usr/bin/bzr', 'baz-import-branch', '../chmsee2']

** please send this report to bazaar at lists.ubuntu.com

-- 
LI Daobing