Comment 2 for bug 1348970

Hi, I got the same error. Traceback:

vstinner@d-bstcld-0000[dev45][aub] ~/ci-cloudwatt % TESTR_PDB=1 testr run --subunit xxx
running=OS_STDOUT_CAPTURE=${OS_STDOUT_CAPTURE:-1} \
OS_STDERR_CAPTURE=${OS_STDERR_CAPTURE:-1} \
OS_TEST_TIMEOUT=${OS_TEST_TIMEOUT:-500} \
OS_TEST_LOCK_PATH=${OS_TEST_LOCK_PATH:-${TMPDIR:-'/tmp'}} \
${PYTHON:-python} -m subunit.run discover -t ./ ${OS_TEST_PATH:-./tempest/test_discover} --list
  File "/usr/lib/python2.7/dist-packages/testrepository/commands/__init__.py", line 143, in execute
    result = self.run()
  File "/usr/lib/python2.7/dist-packages/testrepository/commands/load.py", line 134, in run
    previous_run = repo.get_latest_run()
  File "/usr/lib/python2.7/dist-packages/testrepository/repository/__init__.py", line 99, in get_latest_run
    return self.get_test_run(self.latest_id())
  File "/usr/lib/python2.7/dist-packages/testrepository/repository/file.py", line 136, in get_test_run
    return _DiskRun(run_id, run_subunit_content)

> /usr/lib/python2.7/dist-packages/testrepository/repository/file.py(136)get_test_run()
-> return _DiskRun(run_id, run_subunit_content)

(Pdb) where
  /usr/lib/python2.7/dist-packages/testrepository/commands/__init__.py(143)execute()
-> result = self.run()
  /usr/lib/python2.7/dist-packages/testrepository/commands/load.py(134)run()
-> previous_run = repo.get_latest_run()
  /usr/lib/python2.7/dist-packages/testrepository/repository/__init__.py(99)get_latest_run()
-> return self.get_test_run(self.latest_id())
> /usr/lib/python2.7/dist-packages/testrepository/repository/file.py(136)get_test_run()