Attempting to view file in branch results in oops

https://bazaar.launchpad.net/~lazr-developers/launchpadlib/trunk/files/head:/contrib

Trying to view the file nonpriv-api.py results in an oops. Downloading the file seems to work fine.

NoSuchFile: No such file: u'/contrib/nopriv-api.py'

    Traceback (most recent call last):
  Module oops_wsgi.middleware, line 210, in oops_middleware
    app(environ, oops_start_response))
  Module paste.deploy.config, line 291, in __call__
    return self.app(environ, start_response)
  Module launchpad_loggerhead.wsgi, line 70, in wrapped
    app, environ, start_response, request_done_err, request_done_ok)
  Module paste.wsgilib, line 185, in catch_errors
    app_iter = application(environ, start_response)
  Module launchpad_loggerhead.session, line 39, in __call__
    return self.cookie_handler(environ, start_response)
  Module paste.auth.cookie, line 322, in __call__
    return self.application(environ, response_hook)
  Module launchpad_loggerhead.session, line 66, in _process
    return self.application(environ, response_hook)
  Module paste.httpexceptions, line 640, in __call__
    return self.application(environ, start_response)
  Module launchpad_loggerhead.app, line 291, in __call__
    return view.app(environ, start_response)
  Module loggerhead.apps.branch, line 207, in app
    return c(environ, start_response)
  Module loggerhead.controllers, line 110, in __call__
    values = self.get_values(path, self.kwargs, headers)
  Module loggerhead.controllers.view_ui, line 160, in get_values
    'contents': self.file_contents(file_id, revid),
  Module loggerhead.controllers.view_ui, line 93, in file_contents
    file_lines = self.text_lines(file_id, revid)
  Module loggerhead.controllers.view_ui, line 66, in text_lines
    file_text = tree.get_file_text(path)
  Module breezy.revisiontree, line 69, in get_file_text
    for (identifier, content) in self.iter_files_bytes([(path, None)]):
  Module breezy.bzr.inventorytree, line 829, in iter_files_bytes
    for f, i in desired_files]
  Module breezy.bzr.inventorytree, line 735, in get_file_revision
    return self._path2ie(path).revision
  Module breezy.bzr.inventorytree, line 151, in _path2ie
    raise errors.NoSuchFile(path)
NoSuchFile: No such file: u'/contrib/nopriv-api.py'

OOPS-dd4ad565cbee8b729aa9cb543b99488c