bisect broken in quantal

In Quantal, when I run "bzr bisect start" I get the following output:

bzr: ERROR: exceptions.AttributeError: 'CHKInventoryRepository' object has no attribute 'iter_reverse_revision_history'

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 1141, 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 "/home/thomi/.bazaar/plugins/bisect/cmds.py", line 371, in run
    self.yes(revision)
  File "/home/thomi/.bazaar/plugins/bisect/cmds.py", line 406, in yes
    self._set_state(revspec, "yes")
  File "/home/thomi/.bazaar/plugins/bisect/cmds.py", line 345, in _set_state
    bisect_log.bisect(self.outf)
  File "/home/thomi/.bazaar/plugins/bisect/cmds.py", line 253, in bisect
    self._find_range_and_middle()
  File "/home/thomi/.bazaar/plugins/bisect/cmds.py", line 148, in _find_range_and_middle
    rev_sequence = repo.iter_reverse_revision_history(last_revid)
AttributeError: 'CHKInventoryRepository' object has no attribute 'iter_reverse_revision_history'

bzr 2.6b2 on python 2.7.3 (Linux-3.5.0-5-generic-x86_64-with-
    Ubuntu-12.10-quantal)
arguments: ['/usr/bin/bzr', 'bisect', 'yes']
plugins: bash_completion[2.6b2], bisect[1.1.0dev], builddeb[2.7.0dev],
    builder[0.7.3], changelog_merge[2.6b2], colo[0.4.0], dbus[0.1.0dev],
    git[0.6.9], grep[0.5.0dev], gtk[0.104.0dev], launchpad[2.6b2],
    netrc_credential_store[2.6b2], news_merge[2.6b2], pipeline[1.4.0],
    po_merge[2.6b2], qbzr[0.22.2], rewrite[0.6.4dev], sloecode[unknown],
    weave_fmt[2.6b2]
encoding: 'utf-8', fsenc: 'UTF-8', lang: 'en_NZ.UTF-8'

*** Bazaar has encountered an internal error. This probably indicates a
    bug in Bazaar. You can help us fix it by filing a bug report at
        https://bugs.launchpad.net/bzr/+filebug
    including this traceback and a description of the problem.