failed assertion branch_path == "" in find_prev_location

[Daniel Clemente]

With latest bzr and bzr-svn, this checkout from Subversion crashes after a while.

$ bzr branch https://tikiwiki.svn.sourceforge.net/svnroot/tikiwiki/trunk tiki-bzr

Initialising Subversion metadata cache in /home/dc/.mirp/.cache/bazaar/svn/b456876b-0849-0410-b77d-98878d47e9d5.
bzr: ERROR: exceptions.AssertionError:

Traceback (most recent call last):
  File "/home/w/bzr/oficial/bzrlib/commands.py", line 917, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/home/w/bzr/oficial/bzrlib/commands.py", line 1117, in run_bzr
    ret = run(*run_argv)
  File "/home/w/bzr/oficial/bzrlib/commands.py", line 691, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/home/w/bzr/oficial/bzrlib/commands.py", line 710, in run
    return self._operation.run_simple(*args, **kwargs)
  File "/home/w/bzr/oficial/bzrlib/cleanup.py", line 135, in run_simple
    self.cleanups, self.func, *args, **kwargs)
  File "/home/w/bzr/oficial/bzrlib/cleanup.py", line 165, in _do_with_cleanups
    result = func(*args, **kwargs)
  File "/home/w/bzr/oficial/bzrlib/builtins.py", line 1229, in run
    source_branch=br_from)
  File "/home/dc/.mirp/.bazaar/plugins/svn/remote.py", line 138, in sprout
    return super(SvnRemoteAccess, self).sprout(*args, **kwargs)
  File "/home/w/bzr/oficial/bzrlib/controldir.py", line 406, in sprout
    result_repo.fetch(source_repository, fetch_spec=fetch_spec)
  File "/home/w/bzr/oficial/bzrlib/repository.py", line 1745, in fetch
    find_ghosts=find_ghosts, fetch_spec=fetch_spec)
  File "/home/dc/.mirp/.bazaar/plugins/svn/fetch.py", line 1548, in fetch
    pb=nested_pb)
  File "/home/dc/.mirp/.bazaar/plugins/svn/fetch.py", line 1521, in _get_needed
    find_ghosts=find_ghosts, pb=pb)
  File "/home/dc/.mirp/.bazaar/plugins/svn/fetch.py", line 1292, in find_until
    find_ghosts=find_ghosts, pb=pb))
  File "/home/dc/.mirp/.bazaar/plugins/svn/fetch.py", line 1243, in find_mainline
    branch_path, revnum, to_revnum=0, mapping=mapping):
  File "/home/dc/.mirp/.bazaar/plugins/svn/repository.py", line 829, in _iter_reverse_revmeta_mapping_history
    revmeta = it.next()
  File "/home/dc/.mirp/.bazaar/plugins/svn/util.py", line 165, in next
    return self.it()
  File "/home/dc/.mirp/.bazaar/plugins/svn/revmeta.py", line 999, in next
    ret = self._get_next()
  File "/home/dc/.mirp/.bazaar/plugins/svn/revmeta.py", line 1362, in iter_changes
    from_revnum, to_revnum, pb=pb):
  File "/home/dc/.mirp/.bazaar/plugins/svn/logwalker.py", line 126, in iter_prefixes_changes
    revnum)
  File "/home/dc/.mirp/.bazaar/plugins/svn/changes.py", line 45, in find_prev_location
    assert branch_path == ""
AssertionError

bzr 2.3.0dev3 on python 2.6.6 (Linux-2.6.35.7-i686-with-debian-squeeze-sid)
arguments: ['/w/bzr/oficial/bzr', 'branch', 'https://tikiwiki.svn.sourceforge.net/svnroot/tikiwiki/trunk', 'tiki-bzr']
encoding: 'UTF-8', fsenc: 'UTF-8', lang: 'ca_ES.UTF-8'
plugins:
  bash_completion /home/w/bzr/oficial/bzrlib/plugins/bash_completion [2.3.0dev3]
  bisect /home/dc/.mirp/.bazaar/plugins/bisect [1.1.0.pre.0]
  bzrtools /home/dc/.mirp/.bazaar/plugins/bzrtools [2.3.0]
  etckeeper /usr/lib/python2.6/dist-packages/bzrlib/plugins/etckeeper [unknown]
  explorer /home/dc/.mirp/.bazaar/plugins/explorer [1.1.0dev]
  fastimport /home/dc/.mirp/.bazaar/plugins/fastimport [0.9.0dev]
  gtk /home/dc/.mirp/.bazaar/plugins/gtk [0.99.1]
  launchpad /home/w/bzr/oficial/bzrlib/plugins/launchpad [2.3.0dev3]
  netrc_credential_store /home/w/bzr/oficial/bzrlib/plugins/netrc_credential_store [2.3.0dev3]
  news_merge /home/w/bzr/oficial/bzrlib/plugins/news_merge [2.3.0dev3]
  push_and_update /home/dc/.mirp/.bazaar/plugins/push_and_update [0.2.0dev]
  qbzr /home/dc/.mirp/.bazaar/plugins/qbzr [0.20.0dev1]
  svn /home/dc/.mirp/.bazaar/plugins/svn [1.0.5dev]

*** 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)]

Unfortunately I can't fetch this repository at the moment for other reasons :-(

SubversionException: ("REPORT of '/svnroot/tikiwiki/!svn/bc/30848/trunk': 200 OK (https://tikiwiki.svn.sourceforge.net)", 175002)

[Bryan Cain (plombo)]

I'm having the same problem with the following command:
bzr branch svn+https://lavalit.com/svn/openbor/tools

[Jelmer Vernooij (jelmer)]

Thanks, that's useful information. I've reproduced it now and pushed a fix to trunk.

[Daniel Clemente (n142857)]

The repository mentioned in comment 2 works for me with your patch, but the one mentioned in the description still produces the same error. I'm using latest development versions of subvertpy, bzr-svn and bzr.
See the attached bzr.log