$ bzr branch svn+http://charlie/repos/proj/trunk proj.trunk
The svn+ syntax is deprecated, use http://charlie/repos/proj/trunk instead.
bzr: ERROR: exceptions.AssertionError: Tried registering <RevisionMetadata for revision 350, path trunk in repository '3282bf91-d132-0410-b1ef-d2f8e70e1952'> as parent while <RevisionMetadata for revision 355, path trunk in repository '3282bf91-d132-0410-b1ef-d2f8e70e1952'> already was parent for <RevisionMetadata for revision 356, path trunk in repository '3282bf91-d132-0410-b1ef-d2f8e70e1952'>

Traceback (most recent call last):
  File "/usr/local/lib/python2.5/site-packages/bzrlib/commands.py", line 893, in run_bzr_catch_errors
    return run_bzr(argv)
  File "/usr/local/lib/python2.5/site-packages/bzrlib/commands.py", line 839, in run_bzr
    ret = run(*run_argv)
  File "/usr/local/lib/python2.5/site-packages/bzrlib/commands.py", line 539, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/local/lib/python2.5/site-packages/bzrlib/builtins.py", line 981, in run
    source_branch=br_from)
  File "/usr/local/lib/python2.5/site-packages/bzrlib/plugins/svn/remote.py", line 65, in sprout
    return super(SvnRemoteAccess, self).sprout(*args, **kwargs)
  File "/usr/local/lib/python2.5/site-packages/bzrlib/bzrdir.py", line 1128, in sprout
    result, revision_id=_mod_revision.NULL_REVISION)
  File "/usr/local/lib/python2.5/site-packages/bzrlib/decorators.py", line 138, in read_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/local/lib/python2.5/site-packages/bzrlib/branch.py", line 705, in sprout
    self.copy_content_into(result, revision_id=revision_id)
  File "/usr/local/lib/python2.5/site-packages/bzrlib/decorators.py", line 138, in read_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/local/lib/python2.5/site-packages/bzrlib/branch.py", line 753, in copy_content_into
    self.tags.merge_to(destination.tags)
  File "/usr/local/lib/python2.5/site-packages/bzrlib/tag.py", line 211, in merge_to
    source_dict = self.get_tag_dict()
  File "/usr/local/lib/python2.5/site-packages/bzrlib/plugins/svn/tags.py", line 103, in get_tag_dict
    revnum=self.branch._revnum)
  File "/usr/local/lib/python2.5/site-packages/bzrlib/decorators.py", line 138, in read_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/local/lib/python2.5/site-packages/bzrlib/plugins/svn/repository.py", line 743, in find_tags
    layout=layout, mapping=mapping, from_revnum=0, to_revnum=revnum)
  File "/usr/local/lib/python2.5/site-packages/bzrlib/decorators.py", line 138, in read_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/local/lib/python2.5/site-packages/bzrlib/plugins/svn/repository.py", line 700, in find_tags_between
    entries = list(self._revmeta_provider.iter_all_changes(layout, mapping.is_branch_or_tag, to_revnum, from_revnum, project=project, pb=pb))
  File "/usr/local/lib/python2.5/site-packages/bzrlib/plugins/svn/revmeta.py", line 1199, in iter_all_changes
    for kind, item in browser:
  File "/usr/local/lib/python2.5/site-packages/bzrlib/plugins/svn/revmeta.py", line 817, in next
    return self.it()
  File "/usr/local/lib/python2.5/site-packages/bzrlib/plugins/svn/revmeta.py", line 947, in next
    ret = self._iter.next()
  File "/usr/local/lib/python2.5/site-packages/bzrlib/plugins/svn/revmeta.py", line 1026, in do
    revmeta = process_new_rev(bp, mb, revnum, paths, revprops)
  File "/usr/local/lib/python2.5/site-packages/bzrlib/plugins/svn/revmeta.py", line 965, in process_new_rev
    c._set_direct_lhs_parent_revmeta(revmeta)
  File "/usr/local/lib/python2.5/site-packages/bzrlib/plugins/svn/revmeta.py", line 282, in _set_direct_lhs_parent_revmeta
    raise AssertionError("Tried registering %r as parent while %r already was parent for %r" % (parent_revmeta, self._direct_lhs_parent_revmeta, self))
AssertionError: Tried registering <RevisionMetadata for revision 350, path trunk in repository '3282bf91-d132-0410-b1ef-d2f8e70e1952'> as parent while <RevisionMetadata for revision 355, path trunk in repository '3282bf91-d132-0410-b1ef-d2f8e70e1952'> already was parent for <RevisionMetadata for revision 356, path trunk in repository '3282bf91-d132-0410-b1ef-d2f8e70e1952'>

bzr 1.10 on python 2.5.1 (linux2)
arguments: ['/usr/local/bin/bzr', 'branch', 'svn+http://charlie/repos/proj/trunk', 'proj.trunk']
encoding: 'UTF-8', fsenc: 'UTF-8', lang: 'en_US.UTF-8'
plugins:
  bzrtools             /usr/local/lib/python2.5/site-packages/bzrlib/plugins/bzrtools [1.10]
  extmerge             /usr/local/lib/python2.5/site-packages/bzrlib/plugins/extmerge [unknown]
  gtk                  /usr/local/lib/python2.5/site-packages/bzrlib/plugins/gtk [0.95.0.final.1]
  launchpad            /usr/local/lib/python2.5/site-packages/bzrlib/plugins/launchpad [unknown]
  lessdiff             /usr/local/lib/python2.5/site-packages/bzrlib/plugins/lessdiff [unknown]
  lesslog              /usr/local/lib/python2.5/site-packages/bzrlib/plugins/lesslog [unknown]
  loom                 /usr/local/lib/python2.5/site-packages/bzrlib/plugins/loom [1.3]
  qbzr                 /usr/local/lib/python2.5/site-packages/bzrlib/plugins/qbzr [0.9.5]
  svn                  /usr/local/lib/python2.5/site-packages/bzrlib/plugins/svn [0.5.0.rc.1]
  upload               /usr/local/lib/python2.5/site-packages/bzrlib/plugins/upload [0.1.1]
  xmloutput            /usr/local/lib/python2.5/site-packages/bzrlib/plugins/xmloutput [0.8.1]
*** 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.