This fails in a fairly obvious way with

======================================================================
ERROR: bzrlib.tests.blackbox.test_upgrade.TestWithUpgradableBranches.test_upgrade_permission_check
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_StringException: Text attachment: log
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199.429  run bzr: ['init', '--format=1.6']
199.430  bazaar version: 2.2.0dev1
199.430  bzr arguments: ['init', '--format=1.6']
199.432  encoding stdout as sys.stdout encoding 'UTF-8'
199.438  creating repository in file:///tmp/testbzr-7brzZD.tmp/bzrlib.tests.blackbox.test_upgrade.TestWithUpgradableBranches.test_upgrade_permission_check/work/.bzr/.
199.441  creating branch <bzrlib.branch.BzrBranchFormat7 object at 0x4e26b90> in file:///tmp/testbzr-7brzZD.tmp/bzrlib.tests.blackbox.test_upgrade.TestWithUpgradableBranches.test_upgrade_permission_check/work/.bzr/
199.449  trying to create missing lock '/tmp/testbzr-7brzZD.tmp/bzrlib.tests.blackbox.test_upgrade.TestWithUpgradableBranches.test_upgrade_permission_check/work/.bzr/checkout/dirstate'
199.449  opening working tree '/tmp/testbzr-7brzZD.tmp/bzrlib.tests.blackbox.test_upgrade.TestWithUpgradableBranches.test_upgrade_permission_check/work'
199.456  opening working tree '/tmp/testbzr-7brzZD.tmp/bzrlib.tests.blackbox.test_upgrade.TestWithUpgradableBranches.test_upgrade_permission_check/work'
199.458  output:
'Created a standalone tree (format: 1.6)\n'
199.458  run bzr: ['upgrade']
199.458  bazaar version: 2.2.0dev1
199.458  bzr arguments: ['upgrade']
199.460  encoding stdout as sys.stdout encoding 'UTF-8'
199.472  creating repository in file:///tmp/testbzr-7brzZD.tmp/bzrlib.tests.blackbox.test_upgrade.TestWithUpgradableBranches.test_upgrade_permission_check/work/.bzr/.
 WARNING  Doing on-the-fly conversion from <RepositoryFormatKnitPack5> to <RepositoryFormat2a>.
This may take some time. Upgrade the repositories to the same format for better performance.

199.483  opening working tree '/tmp/testbzr-7brzZD.tmp/bzrlib.tests.blackbox.test_upgrade.TestWithUpgradableBranches.test_upgrade_permission_check/work'
199.492  opening working tree '/tmp/testbzr-7brzZD.tmp/bzrlib.tests.blackbox.test_upgrade.TestWithUpgradableBranches.test_upgrade_permission_check/work'
199.492  output:
'starting upgrade of file:///tmp/testbzr-7brzZD.tmp/bzrlib.tests.blackbox.test_upgrade.TestWithUpgradableBranches.test_upgrade_permission_check/work/\nmaking backup of file:///tmp/testbzr-7brzZD.tmp/bzrlib.tests.blackbox.test_upgrade.TestWithUpgradableBranches.test_upgrade_permission_check/work/.bzr\n  to file:///tmp/testbzr-7brzZD.tmp/bzrlib.tests.blackbox.test_upgrade.TestWithUpgradableBranches.test_upgrade_permission_check/work/backup.bzr.~1~\nstarting repository conversion\nrepository converted\nfinished\n'
199.492  errors:
'Doing on-the-fly conversion from <RepositoryFormatKnitPack5> to <RepositoryFormat2a>.\nThis may take some time. Upgrade the repositories to the same format for better performance.\n\n'
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Text attachment: traceback
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Traceback (most recent call last):
 File "/usr/lib/python2.4/site-packages/testtools/runtest.py", line 128, in _run_user
   return fn(*args)
 File "/usr/lib/python2.4/site-packages/testtools/testcase.py", line 368, in _run_test_method
   testMethod()
 File "/home/pqm/bzr-pqm-workdir/home/+trunk/bzrlib/tests/blackbox/test_upgrade.py", line 160, in test_upgrade_permission_check
   new_perms = os.stat(backup_dir).st_mode & 0777
OSError: [Errno 2] No such file or directory: 'backup.bzr'
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