svn-import fails: “Tried registering %r as parent while %r already was parent for %r”

[Colin D Bennett]

I tried to do an ‘svn-import’ on the LLVM Subversion repository, with

  bzr svn-import http://llvm.org/svn/llvm-project/llvm

and got the following error:

  AssertionError: Tried registering <CachingRevisionMetadata for revision 44579, path test-suite/trunk in repository '91177308-0d34-0410-b5e6-96231b3b80d8'> as parent while <CachingRevisionMetadata for revision 42761, path test-suite/trunk in repository '91177308-0d34-0410-b5e6-96231b3b80d8'> already was parent for <CachingRevisionMetadata for revision 44660, path test-suite/trunk in repository '91177308-0d34-0410-b5e6-96231b3b80d8'>

I have imported this repository successfully before (a month ago, or so). I am using the following versions:

bzr 1.14dev (branch:bzr.dev revno:4144)
bzr-svn 0.5.4dev (branch:0.5 revno:2754)

I wiped out my BZR_HOME/svn-cache and it did not help.

Here is the full output from the import attempt:

cdb@gamma ~/code/llvm/repo2 $ bzr svn-import http://llvm.org/svn/llvm-project/llvm Initialising Subversion metadata cache in /home/cdb/.bazaar/svn-cache/91177308-0d34-0410-b5e6-96231b3b80d8
Importing branches with prefix /llvm/B 2kB/s |
Using repository layout: trunk1
bzr: ERROR: exceptions.AssertionError: Tried registering <CachingRevisionMetadata for revision 44579, path test-suite/trunk in repository '91177308-0d34-0410-b5e6-96231b3b80d8'> as parent while <CachingRevisionMetadata for revision 42761, path test-suite/trunk in repository '91177308-0d34-0410-b5e6-96231b3b80d8'> already was parent for <CachingRevisionMetadata for revision 44660, path test-suite/trunk in repository '91177308-0d34-0410-b5e6-96231b3b80d8'>

Traceback (most recent call last):
  File "/home/cdb/bin/bzr.current/bzrlib/commands.py", line 715, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/home/cdb/bin/bzr.current/bzrlib/commands.py", line 910, in run_bzr
    ret = run(*run_argv)
  File "/home/cdb/bin/bzr.current/bzrlib/commands.py", line 547, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/home/cdb/.bazaar/plugins/svn/commands.py", line 163, in run
    to_revnum=to_revnum, prefix=prefix)
  File "/home/cdb/.bazaar/plugins/svn/convert.py", line 265, in convert_repository
    heads=heads, prefix=prefix, pb=pb)
  File "/home/cdb/.bazaar/plugins/svn/fetch.py", line 972, in find_iter_revisions
    self.needed.extend(self.find_mainline(lhs_parent_revmeta.get_foreign_revid(), lhsm))
  File "/home/cdb/.bazaar/plugins/svn/fetch.py", line 995, in find_mainline
    for revmeta, mapping in self.source._iter_reverse_revmeta_mapping_history(branch_path, revnum, to_revnum=0, mapping=mapping):
  File "/home/cdb/.bazaar/plugins/svn/repository.py", line 765, in _iter_reverse_revmeta_mapping_history
    for revmeta in iter:
  File "/home/cdb/.bazaar/plugins/svn/revmeta.py", line 929, in next
    return self.it()
  File "/home/cdb/.bazaar/plugins/svn/revmeta.py", line 984, in next
    ret = self._get_next()
  File "/home/cdb/.bazaar/plugins/svn/revmeta.py", line 1336, in convert
    metabranch._revs[-1]._set_direct_lhs_parent_revmeta(ret)
  File "/home/cdb/.bazaar/plugins/svn/revmeta.py", line 266, 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 <CachingRevisionMetadata for revision 44579, path test-suite/trunk in repository '91177308-0d34-0410-b5e6-96231b3b80d8'> as parent while <CachingRevisionMetadata for revision 42761, path test-suite/trunk in repository '91177308-0d34-0410-b5e6-96231b3b80d8'> already was parent for <CachingRevisionMetadata for revision 44660, path test-suite/trunk in repository '91177308-0d34-0410-b5e6-96231b3b80d8'>

bzr 1.14dev on python 2.5.4 (linux2)
arguments: ['/home/cdb/bin/bzr', 'svn-import', 'http://llvm.org/svn/llvm-project/llvm']
encoding: 'UTF-8', fsenc: 'UTF-8', lang: 'en_US.utf8'
plugins:
  automv /home/cdb/.bazaar/plugins/automv [unknown]
  bzrtools /home/cdb/.bazaar/plugins/bzrtools [1.13]
  extmerge /home/cdb/.bazaar/plugins/extmerge [unknown]
  gtk /home/cdb/.bazaar/plugins/gtk [0.96.0.dev.1]
  launchpad /home/cdb/bin/bzr.current/bzrlib/plugins/launchpad [unknown]
  loom /home/cdb/.bazaar/plugins/loom [1.4dev]
  mirror /home/cdb/.bazaar/plugins/mirror [unknown]
  netrc_credential_store /home/cdb/bin/bzr.current/bzrlib/plugins/netrc_credential_store [unknown]
  qbzr /home/cdb/.bazaar/plugins/qbzr [0.9.9dev]
  repo_push /home/cdb/.bazaar/plugins/repo_push [1.1]
  svn /home/cdb/.bazaar/plugins/svn [0.5.4dev]
  xmloutput /home/cdb/.bazaar/plugins/xmloutput [0.8.3]
*** 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.
cdb@gamma ~/code/llvm/repo2 $