Crashed trying to commit a file: TypeError: first argument must be string or compiled pattern

[Martin Collins]

mcollins@ccb-adm035:~/CPBL/src/citrus/receiving$ bzr commit pounds_solids_view.xml -m "Fix search_default_test_datetime in PS view."
bzr: ERROR: exceptions.TypeError: first argument must be string or compiled pattern

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 930, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 1121, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 673, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 697, in run
    return self._operation.run_simple(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/cleanup.py", line 136, in run_simple
    self.cleanups, self.func, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/cleanup.py", line 166, in _do_with_cleanups
    result = func(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/builtins.py", line 3687, in run
    lossy=lossy)
  File "/usr/lib/python2.7/dist-packages/bzrlib/decorators.py", line 218, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/workingtree_4.py", line 218, in commit
    result = WorkingTree.commit(self, message, revprops, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/decorators.py", line 218, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/mutabletree.py", line 211, in commit
    *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/commit.py", line 290, in commit
    lossy=lossy)
  File "/usr/lib/python2.7/dist-packages/bzrlib/cleanup.py", line 132, in run
    self.cleanups, self.func, self, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/cleanup.py", line 166, in _do_with_cleanups
    result = func(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/commit.py", line 406, in _commit
    self._set_progress_stage("Collecting changes", counter=True)
  File "/usr/lib/python2.7/dist-packages/bzrlib/commit.py", line 989, in _set_progress_stage
    self._emit_progress()
  File "/usr/lib/python2.7/dist-packages/bzrlib/commit.py", line 998, in _emit_progress
    text = gettext("{0} [{1}] - Stage").format(self.pb_stage_name,
  File "/usr/lib/python2.7/dist-packages/bzrlib/i18n.py", line 40, in gettext
    install()
  File "/usr/lib/python2.7/dist-packages/bzrlib/i18n.py", line 92, in install
    _translations = install_translations(lang)
  File "/usr/lib/python2.7/dist-packages/bzrlib/i18n.py", line 114, in install_translations
    fallback=True)
  File "/usr/lib/python2.7/gettext.py", line 554, in translation
    t = _translations.setdefault(key, class_(fp))
  File "/usr/lib/python2.7/gettext.py", line 255, in __init__
    self._parse(fp)
  File "/usr/lib/python2.7/gettext.py", line 391, in _parse
    self.plural = c2py(plural)
  File "/usr/lib/python2.7/gettext.py", line 177, in c2py
    result, nexttok = _parse(_tokenize(plural))
  File "/usr/lib/python2.7/gettext.py", line 114, in _parse
    nexttok = next(tokens)
  File "/usr/lib/python2.7/gettext.py", line 85, in _tokenize
    for mo in re.finditer(_token_pattern, plural):
  File "/usr/lib/python2.7/re.py", line 190, in finditer
    return _compile(pattern, flags).finditer(string)
  File "/usr/lib/python2.7/re.py", line 247, in _compile
    raise TypeError, "first argument must be string or compiled pattern"
TypeError: first argument must be string or compiled pattern

bzr 2.8.0dev1 on python 2.7.12 (Linux-4.8.0-1-amd64-x86_64-with-
    Sparky-4-Tyche)
arguments: ['/usr/bin/bzr', 'commit', 'pounds_solids_view.xml', '-m', 'Fix
    search_default_test_datetime in PS view.']
plugins: bash_completion[2.8.0dev1], changelog_merge[2.8.0dev1],
    grep[2.8.0dev1], launchpad[2.8.0dev1], netrc_credential_store[2.8.0dev1],
    news_merge[2.8.0dev1], po_merge[2.8.0dev1], weave_fmt[2.8.0dev1]
encoding: 'utf-8', fsenc: 'UTF-8', lang: 'en_GB.UTF-8'