error with "bzr gcommit": 'NoneType' object has no attribute 'abort'

This is what I got from attempting to commit using “bzr gcommit” to my local repository. I was able to make the commit using “bzr commit” and entering a log entry using the provided editor window. It was repeatable twice in a row with the same commit, and different log entries. I have, however, used the gcommit command successfully several times before, which leads me to believe that there was a problem with the specific commit that I made, which should (obviously) not happen with any RCS.

I am using bzr version 1.0 and bzr-gtk 0.93.0 on Ubuntu 7.10, which according to the web site is the version to use with bzr 1.0. If there is any additional information that I can provide, I am happy to provide it; I can provide copies of the repository, I think, in a state where the bug can be replicated. I am not quite sure about that, though. I am going to take a snapshot of the directory as it is currently, however, so that the chances are better—I am actively working in this repository, so I am at the point of making several commits relatively often.

What follows is the shell session that led to the problem. Subsequent attempts at interacting with the repository required me to break the lock on it and then re-commit my changes using the shell—which was successful, as I mentioned earlier.

mbt@garlic:~/projects/programming/trausch-software/zenmoney$ bzr gcommit
Committing to: /home/mbt/projects/programming/trausch-software/zenmoney/
missing aclocal.m4
modified utils/clean-directory-tree
deleted aclocal.m4
bzr: ERROR: exceptions.AttributeError: 'NoneType' object has no attribute 'abort'

Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 802, in run_bzr_catch_errors
    return run_bzr(argv)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 758, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 492, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/gtk/__init__.py", line 370, in run
    wt.unlock()
  File "/usr/lib/python2.5/site-packages/bzrlib/workingtree_4.py", line 1132, in unlock
    self.branch.unlock()
  File "/usr/lib/python2.5/site-packages/bzrlib/branch.py", line 1361, in unlock
    self.repository.unlock()
  File "/usr/lib/python2.5/site-packages/bzrlib/repofmt/pack_repo.py", line 1935, in unlock
    self.abort_write_group()
  File "/usr/lib/python2.5/site-packages/bzrlib/repository.py", line 482, in abort_write_group
    self._abort_write_group()
  File "/usr/lib/python2.5/site-packages/bzrlib/repofmt/pack_repo.py", line 1779, in _abort_write_group
    self._pack_collection._abort_write_group()
  File "/usr/lib/python2.5/site-packages/bzrlib/repofmt/pack_repo.py", line 1583, in _abort_write_group
    self._new_pack.abort()
AttributeError: 'NoneType' object has no attribute 'abort'

bzr 1.0.0 on python 2.5.1.final.0 (linux2)
arguments: ['/usr/bin/bzr', 'gcommit']
encoding: 'UTF-8', fsenc: 'UTF-8', lang: 'en_US.UTF-8'
plugins:
  gtk /usr/lib/python2.5/site-packages/bzrlib/plugins/gtk [0.93.0]
  launchpad /usr/lib/python2.5/site-packages/bzrlib/plugins/launchpad [unknown]
  multiparent /usr/lib/python2.5/site-packages/bzrlib/plugins/multiparent.pyc [unknown]
*** Bazaar has encountered an internal error.
    Please report a bug at https://bugs.launchpad.net/bzr/+filebug
    including this traceback, and a description of what you
    were doing when the error occurred.
mbt@garlic:~/projects/programming/trausch-software/zenmoney$