Very slow bzr-svn checkout that ultimately results in an error

[The Fiddler]

Using Bazaar 2.0.0, I cannot checkout from a sourceforge SVN repository. The repository I am trying to checkout is https://opentk.svn.sourceforge.net/svnroot/opentk/trunk (~2200 commits).

The process takes somewhere between 1 and 2 hours and results in the following error. This is repeatable and occurs on both Ubuntu and Windows:

Initialising Subversion metadata cache in [snipped]\svn-cache\ebc5dd9b-fb1d-0410-b6f8-d24c324e9604.

bzr: ERROR: exceptions.AssertionError: Tried registering <CachingRevisionMetadata for revision 20, path in repository 'ebc5dd9b-fb1d-0410-b6f8-d24c324e9604'> as parent while <CachingRevisionMetadata for revision 76, path in repository 'ebc5dd9b-fb1d-0410-b6f8-d24c324e9604'> already was parent for <CachingRevisionMetadata for revision 77, path trunk in repository 'ebc5dd9b-fb1d-0410-b6f8-d24c324e9604'>

Traceback (most recent call last):
  File "bzrlib\commands.pyo", line 842, in exception_to_return_code
  File "bzrlib\commands.pyo", line 1037, in run_bzr
  File "bzrlib\commands.pyo", line 654, in run_argv_aliases
  File "C:/Program Files/Bazaar/plugins\qbzr\lib\commands.py", line 774, in run
  File "bzrlib\commands.pyo", line 1037, in run_bzr
  File "bzrlib\commands.pyo", line 654, in run_argv_aliases
  File "bzrlib\builtins.pyo", line 1336, in run
  File "C:/Program Files/Bazaar/plugins\svn\branch.py", line 337, in create_checkout
  File "C:/Program Files/Bazaar/plugins\svn\branch.py", line 282, in _create_heavyweight_checkout
  File "bzrlib\decorators.pyo", line 192, in write_locked
  File "bzrlib\branch.pyo", line 948, in pull
  File "C:/Program Files/Bazaar/plugins\svn\branch.py", line 740, in pull
  File "C:/Program Files/Bazaar/plugins\svn\tags.py", line 337, in merge_to
  File "C:/Program Files/Bazaar/plugins\svn\tags.py", line 238, in _get_tag_dict_revmeta
  File "bzrlib\decorators.pyo", line 138, in read_locked
  File "C:/Program Files/Bazaar/plugins\svn\repository.py", line 1156, in find_tags
  File "bzrlib\decorators.pyo", line 138, in read_locked
  File "C:/Program Files/Bazaar/plugins\svn\repository.py", line 1104, in find_tags_between
  File "C:/Program Files/Bazaar/plugins\svn\revmeta.py", line 1426, in iter_all_changes
  File "C:/Program Files/Bazaar/plugins\svn\revmeta.py", line 934, in next
  File "C:/Program Files/Bazaar/plugins\svn\revmeta.py", line 1125, in next
  File "C:/Program Files/Bazaar/plugins\svn\revmeta.py", line 1197, in do
  File "C:/Program Files/Bazaar/plugins\svn\revmeta.py", line 283, in _set_direct_lhs_parent_revmeta
AssertionError: Tried registering <CachingRevisionMetadata for revision 20, path in repository 'ebc5dd9b-fb1d-0410-b6f8-d24c324e9604'> as parent while <CachingRevisionMetadata for revision 76, path in repository 'ebc5dd9b-fb1d-0410-b6f8-d24c324e9604'> already was parent for <CachingRevisionMetadata for revision 77, path trunk in repository 'ebc5dd9b-fb1d-0410-b6f8-d24c324e9604'>

bzr 2.0.0 on python 2.5.4 (Windows-XP-5.1.2600-SP3)
arguments: ['C:\\Program Files\\Bazaar\\bzr.exe', 'qsubprocess', '"checkout" "https://opentk.svn.sourceforge.net/svnroot/opentk/trunk" "C:\\Documents and Settings\\vm\\My Documents\\Projects\\opentk\\trunk"']
encoding: 'cp1253', fsenc: 'mbcs', lang: None
plugins:
  bzrtools C:\Program Files\Bazaar\plugins\bzrtools [2.0.0]
  explorer C:\Program Files\Bazaar\plugins\explorer [0.8.2]
  launchpad C:\Program Files\Bazaar\plugins\launchpad [2.0.0]
  netrc_credential_store C:\Program Files\Bazaar\plugins\netrc_credential_store [2.0.0]
  qbzr C:\Program Files\Bazaar\plugins\qbzr [0.14.2]
  rebase C:\Program Files\Bazaar\plugins\rebase [0.5.3]
  svn C:\Program Files\Bazaar\plugins\svn [1.0.0]
  upload C:\Program Files\Bazaar\plugins\upload [1.0.0dev]
  xmloutput C:\Program Files\Bazaar\plugins\xmloutput [0.8.5]

*** 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.

[Jelmer Vernooij (jelmer)]

   affects bzr-svn
   status triaged
   importance medium

[Martin Pool (mbp)]

Doesn't look like a core bzr bug; please reopen if it is.