`bzr repository-details lp:bzr` fails

C:\work\Bazaar\plugins\repodetails>bzr repository-details lp:bzr
Connected (version 2.0, client Twisted)
Authentication (publickey) successful!
Secsh channel 1 opened.
bzr: ERROR: exceptions.AssertionError: Don't know how to process RemoteRepository(bzr+ssh://bazaar.launchpad.net/~bzr-pqm/bzr/bz
r.dev/.bzr/)

Traceback (most recent call last):
  File "bzrlib\commands.pyo", line 835, in exception_to_return_code
  File "bzrlib\commands.pyo", line 1030, in run_bzr
  File "bzrlib\commands.pyo", line 647, in run_argv_aliases
  File "C:\work\Bazaar\plugins\repodetails\__init__.py", line 53, in run
  File "C:\work\Bazaar\plugins\repodetails\gather_stats.py", line 182, in gather_stats
  File "C:\work\Bazaar\plugins\repodetails\gather_stats.py", line 299, in _gather_stats_locked
AssertionError: Don't know how to process RemoteRepository(bzr+ssh://bazaar.launchpad.net/~bzr-pqm/bzr/bzr.dev/.bzr/)

bzr 1.18 on python 2.5.4 (win32)
arguments: ['C:\\Program Files\\Bazaar\\bzr.EXE', 'repository-details', 'lp:bzr']
encoding: 'cp1251', fsenc: 'mbcs', lang: None
plugins:
  acad C:\work\Bazaar\plugins\acad [0.8]
  bzrtools C:\Program Files\Bazaar\plugins\bzrtools [1.18]
  explorer C:\work\Bazaar\plugins\explorer [0.8dev]
  fastimport C:\work\Bazaar\plugins\fastimport [0.9dev]
  launchpad C:\Program Files\Bazaar\plugins\launchpad [1.18]
  qbzr C:\work\Bazaar\plugins\qbzr [0.15dev]
  rebase C:\work\Bazaar\plugins\rebase [0.5.4dev]
  repoalias C:\work\Bazaar\plugins\repoalias [unknown]
  repodetails C:\work\Bazaar\plugins\repodetails [1.9dev]
  scmproj C:\work\Bazaar\plugins\scmproj [0.4.5.dev.2]
  x_bit C:\work\Bazaar\plugins\x_bit [1.0]
*** 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.