bzr: ERROR: exceptions.NotImplementedError: <bound method ImportParser.read_until of <bzrlib.plugins.fastimport.parser.ImportParser object at 0x9025eec>>

Hi. The attached file is a greatly shortened version of output from a very slightly modified version of the script named "contrib/import-tars.perl" in the git repository. (The only significant change was essentially to have it run "cat" instead of "git fast-import --quiet".) It was shortened for your convenience; the exact same traceback results from the full file, which I'd be happy to provide, but don't see the point.

It imports fine with git fast-import, but fails to import with bzr:

naesten@hydrogen:~/hacking/scamper% bzr fast-import tiny-import.txt
bzr: ERROR: exceptions.NotImplementedError: <bound method ImportParser.read_until of <bzrlib.plugins.fastimport.parser.ImportParser object at 0x9025eec>>

Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 835, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 1030, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 647, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/home/naesten/.bazaar/plugins/fastimport/__init__.py", line 221, in run
    params, verbose)
  File "/home/naesten/.bazaar/plugins/fastimport/__init__.py", line 75, in _run
    return proc.process(p.iter_commands)
  File "/home/naesten/.bazaar/plugins/fastimport/processor.py", line 92, in process
    self._process(command_iter)
  File "/home/naesten/.bazaar/plugins/fastimport/processors/generic_processor.py", line 269, in _process
    processor.ImportProcessor._process(self, command_iter)
  File "/home/naesten/.bazaar/plugins/fastimport/processor.py", line 107, in _process
    for cmd in command_iter():
  File "/home/naesten/.bazaar/plugins/fastimport/parser.py", line 273, in iter_commands
    yield self._parse_commit(line[len('commit '):])
  File "/home/naesten/.bazaar/plugins/fastimport/parser.py", line 330, in _parse_commit
    message = self._get_data('commit', 'message')
  File "/home/naesten/.bazaar/plugins/fastimport/parser.py", line 437, in _get_data
    return self.read_until(rest[2:])
  File "/home/naesten/.bazaar/plugins/fastimport/parser.py", line 237, in read_until
    raise NotImplementedError(self.read_until)
NotImplementedError: <bound method ImportParser.read_until of <bzrlib.plugins.fastimport.parser.ImportParser object at 0x9025eec>>

bzr 1.18dev on python 2.5.4 (linux2)
arguments: ['/usr/bin/bzr', 'fast-import', 'tiny-import.txt']
encoding: 'UTF-8', fsenc: 'UTF-8', lang: 'en_US.UTF-8'
plugins:
  bisect /home/naesten/.bazaar/plugins/bisect [1.1.0.pre.0]
  bzrtools /usr/lib/python2.5/site-packages/bzrlib/plugins/bzrtools [1.18]
  fastimport /home/naesten/.bazaar/plugins/fastimport [0.8dev]
  git /home/naesten/.bazaar/plugins/git [0.4.1dev]
  launchpad /usr/lib/python2.5/site-packages/bzrlib/plugins/launchpad [1.18dev]
  netrc_credential_store /usr/lib/python2.5/site-packages/bzrlib/plugins/netrc_credential_store [1.18dev]
  push_and_update /home/naesten/.bazaar/plugins/push_and_update [0.2dev]
  repo_push /home/naesten/.bazaar/plugins/repo_push [1.1]
  svn /home/naesten/.bazaar/plugins/svn [0.6.3dev]
*** 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.

It looks like you may have forgotten to implement or test here-document input for tag and commit messages, which is apparently defined in the production:

  delimited_data ::= 'data' sp '<<' delim lf
    (data_line lf)*
    delim lf;

(as found in the concerned module's docstring).

I may have a go at fixing this tomorrow if nobody beats me to it.