iter_changes on caching logwalker supports only one prefix

[Jelmer Vernooij]

Traceback (most recent call last):
  File "/srv/importd.launchpad.net/production/launchpad-rev-9329/scripts/code-import-worker.py", line 82, in <module>
    sys.exit(script.main())
  File "/srv/importd.launchpad.net/production/launchpad-rev-9329/scripts/code-import-worker.py", line 77, in main
    return import_worker.run()
  File "/srv/importd.launchpad.net/production/launchpad-rev-9329/lib/lp/codehosting/codeimport/worker.py", line 437, in run
    return self._doImport()
  File "/srv/importd.launchpad.net/production/launchpad-rev-9329/lib/lp/codehosting/codeimport/worker.py", line 575, in _doImport
    overwrite=True, **self.getExtraPullArgs())
  File "/srv/importd.launchpad.net/production/launchpad-rev-9329/optionalbzrplugins/svn/branch.py", line 787, in pull
    _to_revnum=tags_until_revnum)
  File "/srv/importd.launchpad.net/production/launchpad-rev-9329/optionalbzrplugins/svn/tags.py", line 337, in merge_to
    tag_revmetas = self._get_tag_dict_revmeta(_from_revnum, _to_revnum)
  File "/srv/importd.launchpad.net/production/launchpad-rev-9329/optionalbzrplugins/svn/tags.py", line 238, in _get_tag_dict_revmeta
    revnum=self.branch._revnum)
  File "<string>", line 4, in find_tags_read_locked
  File "/srv/importd.launchpad.net/production/launchpad-rev-9329/optionalbzrplugins/svn/repository.py", line 1160, in find_tags
    to_revnum=revnum)
  File "<string>", line 4, in find_tags_between_read_locked
  File "/srv/importd.launchpad.net/production/launchpad-rev-9329/optionalbzrplugins/svn/repository.py", line 1108, in find_tags_between
    for kind, item in self._revmeta_provider.iter_all_changes(layout, mapping.is_branch_or_tag, to_revnum, from_revnum, project=project):
  File "/srv/importd.launchpad.net/production/launchpad-rev-9329/optionalbzrplugins/svn/revmeta.py", line 1426, in iter_all_changes
    for kind, item in browser:
  File "/srv/importd.launchpad.net/production/launchpad-rev-9329/optionalbzrplugins/svn/revmeta.py", line 934, in next
    return self.it()
  File "/srv/importd.launchpad.net/production/launchpad-rev-9329/optionalbzrplugins/svn/revmeta.py", line 1125, in next
    ret = self._iter.next()
  File "/srv/importd.launchpad.net/production/launchpad-rev-9329/optionalbzrplugins/svn/revmeta.py", line 1134, in do
    for (paths, revnum, revprops) in self._iter_log:
  File "/srv/importd.launchpad.net/production/launchpad-rev-9329/optionalbzrplugins/svn/logwalker.py", line 55, in iter_changes
    assert len(prefixes) == 1
AssertionError
Import failed:
Traceback (most recent call last):
Failure: twisted.internet.error.ProcessTerminated: A process has ended with a probable error condition: process ended with exit code 1.

[Jelmer Vernooij (jelmer)]

This affects the KDE imports.