bzr crashes on checkin

I am checking in a file and I see the crash. Following is the call stack

modified src/com/cz/hindiwriter/war/HindiWriter.html
modified src/com/cz/webapp/snooper/models.py
aborting commit write group: RetryWithNewPacks(Unprintable exception RetryWithNewPacks: dict={'exc_info': (<class 'bzrlib.errors.NoSuchFile'>, NoSuchFile(No such file: u'/home/mdg/remington/.bzr/repository/packs/c41d70869760bbefce211942f40711e8.pack': [Errno 2] No such file or directory: u'/home/mdg/remington/.bzr/repository/packs/c41d70869760bbefce211942f40711e8.pack'), <traceback object at 0x989775c>), '_preformatted_string': None, 'reload_occurred': False, 'orig_error': NoSuchFile(No such file: u'/home/mdg/remington/.bzr/repository/packs/c41d70869760bbefce211942f40711e8.pack': [Errno 2] No such file or directory: u'/home/mdg/remington/.bzr/repository/packs/c41d70869760bbefce211942f40711e8.pack')}, fmt='Pack files have changed, reload and retry. context: %(context)s %(orig_error)s', error=KeyError('context',))
bzr: ERROR: bzrlib.errors.RetryWithNewPacks: Unprintable exception RetryWithNewPacks: dict={'exc_info': (<class 'bzrlib.errors.NoSuchFile'>, NoSuchFile(No such file: u'/home/mdg/remington/.bzr/repository/packs/c41d70869760bbefce211942f40711e8.pack': [Errno 2] No such file or directory: u'/home/mdg/remington/.bzr/repository/packs/c41d70869760bbefce211942f40711e8.pack'), <traceback object at 0x989775c>), '_preformatted_string': None, 'reload_occurred': False, 'orig_error': NoSuchFile(No such file: u'/home/mdg/remington/.bzr/repository/packs/c41d70869760bbefce211942f40711e8.pack': [Errno 2] No such file or directory: u'/home/mdg/remington/.bzr/repository/packs/c41d70869760bbefce211942f40711e8.pack')}, fmt='Pack files have changed, reload and retry. context: %(context)s %(orig_error)s', error=KeyError('context',)

Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 853, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 1055, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 661, in run_argv_aliases
    return self.run_direct(**all_cmd_args)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 665, in run_direct
    return self._operation.run_simple(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/cleanup.py", line 122, in run_simple
    self.cleanups, self.func, *args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/cleanup.py", line 156, in _do_with_cleanups
    result = func(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/builtins.py", line 3138, in run
    exclude=safe_relpath_files(tree, exclude))
  File "/usr/lib/python2.6/dist-packages/bzrlib/decorators.py", line 194, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/workingtree_4.py", line 197, in commit
    result = WorkingTree3.commit(self, message, revprops, *args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/decorators.py", line 194, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/mutabletree.py", line 226, in commit
    *args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commit.py", line 257, in commit
    possible_master_transports=possible_master_transports)
  File "/usr/lib/python2.6/dist-packages/bzrlib/cleanup.py", line 118, in run
    self.cleanups, self.func, self, *args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/cleanup.py", line 156, in _do_with_cleanups
    result = func(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commit.py", line 402, in _commit
    self.rev_id = self.builder.commit(self.message)
  File "/usr/lib/python2.6/dist-packages/bzrlib/repository.py", line 179, in commit
    self.repository.commit_write_group()
  File "/usr/lib/python2.6/dist-packages/bzrlib/repository.py", line 1563, in commit_write_group
    result = self._commit_write_group()
  File "/usr/lib/python2.6/dist-packages/bzrlib/repofmt/pack_repo.py", line 2314, in _commit_write_group
    hint = self._pack_collection._commit_write_group()
  File "/usr/lib/python2.6/dist-packages/bzrlib/repofmt/pack_repo.py", line 2174, in _commit_write_group
    result = self.autopack()
  File "/usr/lib/python2.6/dist-packages/bzrlib/repofmt/pack_repo.py", line 1476, in autopack
    return self._do_autopack()
  File "/usr/lib/python2.6/dist-packages/bzrlib/repofmt/pack_repo.py", line 1516, in _do_autopack
    reload_func=self._restart_autopack)
  File "/usr/lib/python2.6/dist-packages/bzrlib/repofmt/groupcompress_repo.py", line 702, in _execute_pack_operations
    result = packer.pack()
  File "/usr/lib/python2.6/dist-packages/bzrlib/repofmt/pack_repo.py", line 761, in pack
    return self._create_pack_from_packs()
  File "/usr/lib/python2.6/dist-packages/bzrlib/repofmt/groupcompress_repo.py", line 484, in _create_pack_from_packs
    self._copy_revision_texts()
  File "/usr/lib/python2.6/dist-packages/bzrlib/repofmt/groupcompress_repo.py", line 413, in _copy_revision_texts
    'revisions', self._get_progress_stream, 1)
  File "/usr/lib/python2.6/dist-packages/bzrlib/repofmt/groupcompress_repo.py", line 402, in _copy_stream
    reuse_blocks=False):
  File "/usr/lib/python2.6/dist-packages/bzrlib/groupcompress.py", line 1653, in _insert_record_stream
    for record in stream:
  File "/usr/lib/python2.6/dist-packages/bzrlib/repofmt/groupcompress_repo.py", line 208, in pb_stream
    for idx, record in enumerate(substream):
  File "/usr/lib/python2.6/dist-packages/bzrlib/groupcompress.py", line 1418, in get_record_stream
    self._access.reload_or_raise(e)
  File "/usr/lib/python2.6/dist-packages/bzrlib/knit.py", line 3407, in reload_or_raise
    elif not self._reload_func():
  File "/usr/lib/python2.6/dist-packages/bzrlib/groupcompress.py", line 1413, in get_record_stream
    orig_keys, ordering, include_delta_closure):
  File "/usr/lib/python2.6/dist-packages/bzrlib/groupcompress.py", line 1572, in _get_remaining_record_stream
    for factory in batcher.yield_factories(full_flush=True):
  File "/usr/lib/python2.6/dist-packages/bzrlib/groupcompress.py", line 1130, in yield_factories
    block_read_memo, block = blocks.next()
  File "/usr/lib/python2.6/dist-packages/bzrlib/groupcompress.py", line 1369, in _get_blocks
    zdata = raw_records.next()
  File "/usr/lib/python2.6/dist-packages/bzrlib/knit.py", line 3380, in get_raw_records
    exc_info=sys.exc_info())
RetryWithNewPacks: Unprintable exception RetryWithNewPacks: dict={'exc_info': (<class 'bzrlib.errors.NoSuchFile'>, NoSuchFile(No such file: u'/home/mdg/remington/.bzr/repository/packs/c41d70869760bbefce211942f40711e8.pack': [Errno 2] No such file or directory: u'/home/mdg/remington/.bzr/repository/packs/c41d70869760bbefce211942f40711e8.pack'), <traceback object at 0x989775c>), '_preformatted_string': None, 'reload_occurred': False, 'orig_error': NoSuchFile(No such file: u'/home/mdg/remington/.bzr/repository/packs/c41d70869760bbefce211942f40711e8.pack': [Errno 2] No such file or directory: u'/home/mdg/remington/.bzr/repository/packs/c41d70869760bbefce211942f40711e8.pack')}, fmt='Pack files have changed, reload and retry. context: %(context)s %(orig_error)s', error=KeyError('context',)

bzr 2.1.4 on python 2.6.5 (Linux-2.6.39.1-linode34-i686-with-Ubuntu-10.04-lucid)
arguments: ['/usr/bin/bzr', 'commit', '-m', 'updated with google plus code and full text in admin']
encoding: 'UTF-8', fsenc: 'UTF-8', lang: 'en_US.UTF-8'
plugins:
  bzrtools /usr/lib/python2.6/dist-packages/bzrlib/plugins/bzrtools [2.1.0]
  launchpad /usr/lib/python2.6/dist-packages/bzrlib/plugins/launchpad [2.1.4]
  netrc_credential_store /usr/lib/python2.6/dist-packages/bzrlib/plugins/netrc_credential_store [2.1.4]
  news_merge /usr/lib/python2.6/dist-packages/bzrlib/plugins/news_merge [2.1.4]