bzr send results in TypeError: send_svn() takes exactly 8 arguments (9 given)

glyph@rem:~/Projects/Twisted/branches/bzr.trunk★ bzr send -o - svn+ssh://svn.twistedmatrix.com/svn/Twisted/trunk
 ↩ Mon Oct 22 12:14:30 PDT 2012
bzr: ERROR: exceptions.TypeError: send_svn() takes exactly 8 arguments (9 given)

Traceback (most recent call last):
  File "/Library/Python/2.6/site-packages/bzrlib/commands.py", line 920, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/Library/Python/2.6/site-packages/bzrlib/commands.py", line 1131, in run_bzr
    ret = run(*run_argv)
  File "/Library/Python/2.6/site-packages/bzrlib/commands.py", line 673, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/Library/Python/2.6/site-packages/bzrlib/commands.py", line 695, in run
    return self._operation.run_simple(*args, **kwargs)
  File "/Library/Python/2.6/site-packages/bzrlib/cleanup.py", line 136, in run_simple
    self.cleanups, self.func, *args, **kwargs)
  File "/Library/Python/2.6/site-packages/bzrlib/cleanup.py", line 166, in _do_with_cleanups
    result = func(*args, **kwargs)
  File "/Library/Python/2.6/site-packages/bzrlib/builtins.py", line 5839, in run
    strict=strict)
  File "/Library/Python/2.6/site-packages/bzrlib/send.py", line 132, in send
    submit_branch)
TypeError: send_svn() takes exactly 8 arguments (9 given)

bzr 2.5.0 on python 2.6.7 (Darwin-12.2.0-x86_64-i386-64bit)
arguments: ['/usr/local/bin/bzr', 'send', '-o', '-',
    'svn+ssh://svn.twistedmatrix.com/svn/Twisted/trunk']
plugins: bash_completion[2.5.0], bzrtools[2.5.0], changelog_merge[2.5.0],
    colo[0.4.0], email[unknown], explorer[1.2.2], fastimport[0.14.0dev],
    git[0.6.7], keychain[0.1.0], launchpad[2.5.0], loom[2.2.1dev],
    netrc_credential_store[2.5.0], news_merge[2.5.0], pipeline[1.4.0],
    po_merge[2.5.0], push_and_update[0.2.0dev], qbzr[0.22.1],
    rewrite[0.6.4dev], shortcuts[unknown], svn[1.2.1], upload[1.0.1dev],
    weave_fmt[2.5.0], xmloutput[0.8.8]
encoding: 'utf-8', fsenc: 'utf-8', lang: 'en_US.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.
 ↪ Mon Oct 22 12:14:31 PDT 2012 (★ bzr send -o - svn+ssh://svn.twistedmatrix.com/svn/Twisted/trunk) (1 seconds elapsed)