branching fails with "Parent didn't exist yet, but child wasn't added !?"

[Tim Hatch]

tim@dalek ~/code $ svn co http://trac.pocoo.org/repos/pygments/trunk pygments
...
tim@dalek ~/code $ time bzr branch pygments pygments-bzr
version of bzr-svn is experimental; output may change between revisions
bzr: ERROR: exceptions.AssertionError: Parent didn't exist yet, but child wasn't added !?

Traceback (most recent call last):
  File "/home/tim/code/bzr.dev/bzrlib/commands.py", line 729, in run_bzr_catch_errors
    return run_bzr(argv)
  File "/home/tim/code/bzr.dev/bzrlib/commands.py", line 691, in run_bzr
    ret = run(*run_argv)
  File "/home/tim/code/bzr.dev/bzrlib/commands.py", line 389, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/home/tim/code/bzr.dev/bzrlib/builtins.py", line 884, in run
    possible_transports=[to_transport])
  File "/home/tim/.bazaar/plugins/svn/workingtree.py", line 736, in sprout
    repo.clone(result, revision_id)
  File "/home/tim/code/bzr.dev/bzrlib/decorators.py", line 127, in read_locked
    return unbound(self, *args, **kwargs)
  File "/home/tim/code/bzr.dev/bzrlib/repository.py", line 410, in clone
    self.copy_content_into(dest_repo, revision_id)
  File "/home/tim/code/bzr.dev/bzrlib/repository.py", line 360, in copy_content_into
    return InterRepository.get(self, destination).copy_content(revision_id)
  File "/home/tim/.bazaar/plugins/svn/fetch.py", line 376, in copy_content
    (needed, parents) = self._find_until(revision_id)
  File "/home/tim/.bazaar/plugins/svn/fetch.py", line 349, in _find_until
    until_revnum, scheme):
  File "/home/tim/.bazaar/plugins/svn/repository.py", line 767, in follow_branch
    assert paths[p][1] is not None and paths[p][0] in ('A', 'R'), "Parent didn't exist yet, but child wasn't added !?"
AssertionError: Parent didn't exist yet, but child wasn't added !?

bzr 0.19.0dev0 on python 2.5.1.final.0 (linux2)
arguments: ['/home/tim/code/bzr/bzr', 'branch', 'pygments', 'pygments-bzr']

** please send this report to <email address hidden>

real 0m42.443s
user 0m4.596s
sys 0m0.436s

[Jelmer Vernooij (jelmer)]

Hi Tim,

Thanks for the bug report.

What version of bzr-svn and bzr were you using?

--
Jelmer Vernooij <email address hidden> - http://samba.org/~jelmer/
Jabber: <email address hidden>

[Tim Hatch (timhatch)]

I went ahead and upgraded bzr-svn and bzr itself, and the problem
still persists. The original report was against r603 of bzr-svn and
about a week old bzr.dev.

tim@dalek ~/.bazaar/plugins/svn $ bzr version-info
revision-id: <email address hidden>
date: 2007-08-04 21:24:55 +0200
build-date: 2007-08-08 16:54:28 -0500
revno: 628
branch-nick: svn
tim@dalek ~/.bazaar/plugins/svn $ bzr info
Checkout (format: dirstate-with-subtree)
Location:
        checkout root: .
   checkout of branch: http://people.samba.org/bzr/jelmer/bzr-svn/trunk/

Related branches:
   parent branch: http://people.samba.org/bzr/jelmer/bzr-svn/trunk/

Bazaar (bzr) 0.19.0dev0
   from bzr checkout /home/tim/code/bzr.dev
     revision: 2686
     revid: <email address hidden>
     branch nick: bzr.dev
   Python interpreter: /usr/bin/python 2.5.1.final.0

Relevant subversion.conf

[61b12c5d-1607-0410-9915-ad3ff3e075d5]
locations = http://trac.pocoo.org/repos
branching-scheme = trunk1

And an updated traceback with the new versions:

Traceback (most recent call last):
   File "/home/tim/code/bzr.dev/bzrlib/commands.py", line 817, in
run_bzr_catch_errors
     return run_bzr(argv)
   File "/home/tim/code/bzr.dev/bzrlib/commands.py", line 779, in
run_bzr
     ret = run(*run_argv)
   File "/home/tim/code/bzr.dev/bzrlib/commands.py", line 477, in
run_argv_aliases
     return self.run(**all_cmd_args)
   File "/home/tim/code/bzr.dev/bzrlib/builtins.py", line 885, in run
     possible_transports=[to_transport])
   File "/home/tim/.bazaar/plugins/svn/workingtree.py", line 735, in
sprout
     repo.clone(result, revision_id)
   File "/home/tim/code/bzr.dev/bzrlib/decorators.py", line 127, in
read_locked
     return unbound(self, *args, **kwargs)
   File "/home/tim/code/bzr.dev/bzrlib/repository.py", line 489, in
clone
     self.copy_content_into(dest_repo, revision_id)
   File "/home/tim/code/bzr.dev/bzrlib/repository.py", line 412, in
copy_content_into
     return InterRepository.get(self, destination).copy_content
(revision_id)
   File "/home/tim/.bazaar/plugins/svn/fetch.py", line 380, in
copy_content
     (needed, parents) = self._find_until(revision_id)
   File "/home/tim/.bazaar/plugins/svn/fetch.py", line 353, in
_find_until
     until_revnum, scheme):
   File "/home/tim/.bazaar/plugins/svn/repository.py", line 784, in
follow_branch
     assert paths[p][1] is not None and paths[p][0] in ('A', 'R'),
"Parent didn't exist yet, but child wasn't added !?"
AssertionError: Parent didn't exist yet, but child wasn't added !?

[Jelmer Vernooij (jelmer)]

  status triaged
  importance low

Thanks, confirmed.

Simplest way to reproduce this:

$ bzr branch http://trac.pocoo.org/repos/pygments/trunk

The fact that the parent directory of the branch was modified here seems
to be the problem.

(Marking as importance low because it doesn't appear to be a common
problem.)

--
Jelmer Vernooij <email address hidden> - http://samba.org/~jelmer/
Jabber: <email address hidden>

[Jelmer Vernooij (jelmer)]

Changes in the revision that is problematic:

r2214 | gbrandl | 2006-10-19 20:26:31 +0200 (Do, 19 Okt 2006) | 3 lines
Changed paths:
   A /pykleur/trunk/pygments (from /pykleur/trunk/pykleur:2211)
   R /pykleur/trunk/pygments/__init__.py
(from /pykleur/trunk/pykleur/__init__.py:2213)
   R /pykleur/trunk/pygments/console.py
(from /pykleur/trunk/pykleur/console.py:2213)
   R /pykleur/trunk/pygments/formatter.py
(from /pykleur/trunk/pykleur/formatter.py:2213)
   R /pykleur/trunk/pygments/formatters
(from /pykleur/trunk/pykleur/formatters:2213)
   R /pykleur/trunk/pygments/lexer.py
(from /pykleur/trunk/pykleur/lexer.py:2213)
   R /pykleur/trunk/pygments/lexers
(from /pykleur/trunk/pykleur/lexers:2213)
   R /pykleur/trunk/pygments/style.py
(from /pykleur/trunk/pykleur/style.py:2213)
   R /pykleur/trunk/pygments/styles
(from /pykleur/trunk/pykleur/styles:2213)
   R /pykleur/trunk/pygments/token.py
(from /pykleur/trunk/pykleur/token.py:2213)
   R /pykleur/trunk/pygments/util.py
(from /pykleur/trunk/pykleur/util.py:2213)
   D /pykleur/trunk/pykleur

--
Jelmer Vernooij <email address hidden> - http://samba.org/~jelmer/
Jabber: <email address hidden>

[David Cournapeau (david-ar)]

I have the same problem on another svn repository:

bzr svn-import http://ipython.scipy.org/svn/ipython ipython.bzr/

(with bzr-svn 0.4.0 and recent bzr from dev branch). Is there any kind of workaround ?

[Jelmer Vernooij (jelmer)]

Not yet, but I have some clue as to what is going on. I hope to fix it
in 0.4.1.

--
Jelmer Vernooij <email address hidden> - http://samba.org/~jelmer/
Jabber: <email address hidden>

[Jelmer Vernooij (jelmer)]

Am Samstag, den 25.08.2007, 14:46 +0000 schrieb Jelmer Vernooij:
> Not yet, but I have some clue as to what is going on. I hope to fix it
> in 0.4.1.
Fix is in bzr, will be in 0.4.1.

  status fixcommitted
--
Jelmer Vernooij <email address hidden> - http://samba.org/~jelmer/
Jabber: <email address hidden>