bzr crashed with ValueError in _last_revision_info(): need more than 1 value to unpack

Binary package hint: bzr

I also get this trace when I try to commit to the branch:

clint@clint-MacBookPro:~/src/drizzle/auth-file-enhancements-2$ bzr commit -m 'passes tests, using cache'
bzr: ERROR: exceptions.ValueError: need more than 1 value to unpack

Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.7/bzrlib/commands.py", line 923, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/usr/lib/pymodules/python2.7/bzrlib/commands.py", line 1123, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/pymodules/python2.7/bzrlib/commands.py", line 691, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/pymodules/python2.7/bzrlib/commands.py", line 710, in run
    return self._operation.run_simple(*args, **kwargs)
  File "/usr/lib/pymodules/python2.7/bzrlib/cleanup.py", line 135, in run_simple
    self.cleanups, self.func, *args, **kwargs)
  File "/usr/lib/pymodules/python2.7/bzrlib/cleanup.py", line 165, in _do_with_cleanups
    result = func(*args, **kwargs)
  File "/usr/lib/pymodules/python2.7/bzrlib/builtins.py", line 3241, in run
    exclude=tree.safe_relpath_files(exclude))
  File "/usr/lib/pymodules/python2.7/bzrlib/decorators.py", line 194, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/lib/pymodules/python2.7/bzrlib/workingtree_4.py", line 197, in commit
    result = WorkingTree3.commit(self, message, revprops, *args, **kwargs)
  File "/usr/lib/pymodules/python2.7/bzrlib/decorators.py", line 194, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/lib/pymodules/python2.7/bzrlib/mutabletree.py", line 201, in commit
    *args, **kwargs)
  File "/usr/lib/pymodules/python2.7/bzrlib/commit.py", line 286, in commit
    possible_master_transports=possible_master_transports)
  File "/usr/lib/pymodules/python2.7/bzrlib/cleanup.py", line 131, in run
    self.cleanups, self.func, self, *args, **kwargs)
  File "/usr/lib/pymodules/python2.7/bzrlib/cleanup.py", line 165, in _do_with_cleanups
    result = func(*args, **kwargs)
  File "/usr/lib/pymodules/python2.7/bzrlib/commit.py", line 363, in _commit
    old_revno, new_revno = self._check_out_of_date_tree()
  File "/usr/lib/pymodules/python2.7/bzrlib/commit.py", line 556, in _check_out_of_date_tree
    old_revno, master_last = self.master_branch.last_revision_info()
  File "/usr/lib/pymodules/python2.7/bzrlib/decorators.py", line 140, in read_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/lib/pymodules/python2.7/bzrlib/branch.py", line 988, in last_revision_info
    self._last_revision_info_cache = self._last_revision_info()
  File "/usr/lib/pymodules/python2.7/bzrlib/branch.py", line 2841, in _last_revision_info
    revno, revision_id = revision_string.rstrip('\n').split(' ', 1)
ValueError: need more than 1 value to unpack

You can report this problem to Bazaar's developers by running
    apport-bug /var/crash/bzr.1000.2011-03-03T01:42.crash
if a bug-reporting window does not automatically appear.

Which appears related....

Looking at the .bzr/branch/last-revision file shows that is definitely corrupted:

cat !$
clint@clint-MacBookPro:~/src/drizzle/auth-file-enhancements-2$ cat .bzr/branch/last-revision
/home/clint/src/drizzle/auth-file-enhancements-2/plugiclint@clint-MacBookPro:~/src/drizzle/auth-file-enhancements-2$

So the bug here may be in how it got corrupted in such a way without a huge warning, as now I have basically lost the entire branch's revision history and can only diff it against other branches for manual merging.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: bzr 2.3.0-2
ProcVersionSignature: Ubuntu 2.6.38-5.32-generic 2.6.38-rc6
Uname: Linux 2.6.38-5-generic x86_64
NonfreeKernelModules: wl nvidia
Architecture: amd64
BzrDebugFlags: set()
BzrVersion: 2.3.0
CommandLine: ['/usr/bin/bzr', 'status']
CrashDb: bzr
Date: Thu Mar 3 03:38:17 2011
ExecutablePath: /usr/bin/bzr
FileSystemEncoding: UTF-8
InstallationMedia: Xubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101008.1)
InterpreterPath: /usr/bin/python2.7
Locale: en_US.UTF-8
PackageArchitecture: all
Platform: Linux-2.6.38-5-generic-x86_64-with-Ubuntu-11.04-natty
ProcCmdline: /usr/bin/python /usr/bin/bzr status
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LC_MESSAGES=en_US.utf8
 LANG=en_US.UTF-8
 LANGUAGE=en_US:en
PythonVersion: 2.7.1
SourcePackage: bzr
Title: bzr crashed with ValueError in _last_revision_info(): need more than 1 value to unpack
UserEncoding: UTF-8
UserGroups: adm admin cdrom dialout libvirtd lpadmin plugdev sambashare sbuild