UnboundLocalError: local variable 'sftp_client' referenced before assignment

The following error occurs after switching from raring to saucy
http://10.97.2.10:8080/job/openarena-benchmark-ps-intel-4000-he/38/console

2013-05-10 10:02:38,282 rsyslog WARNING: Expected pattern missed, matched future pattern: <_sre.SRE_Match object at 0x2462780>
2013-05-10 10:03:25,886 ssh WARNING: SSH command (utah -f yaml --install-type desktop -r /tmp/master.run -o /var/lib/utah/utah.out) failed with return code: 3
2013-05-10 10:03:25,889 root ERROR: Failed to run test: [Errno 111] Connection refused
Unhandled error in UTAH:
Traceback (most recent call last):
  File "/usr/bin/run_utah_tests.py", line 237, in <module>
    exitstatus = timeout(config.jobtimeout, run_utah_tests)
  File "/usr/lib/python2.7/dist-packages/utah/timeout.py", line 65, in timeout
    return command(*args, **kw)
  File "/usr/bin/run_utah_tests.py", line 226, in run_utah_tests
    exitstatus, locallogs = run_tests(args, _get_machine(args))
  File "/usr/lib/python2.7/dist-packages/utah/run.py", line 271, in run_tests
    _write(machine, args, locallogs, remote_path)
  File "/usr/lib/python2.7/dist-packages/utah/run.py", line 206, in _write
    machine.downloadfiles(report_remote_path, report_local_path)
  File "/usr/lib/python2.7/dist-packages/utah/provisioning/ssh.py", line 261, in downloadfiles
    sftp_client.close()
UnboundLocalError: local variable 'sftp_client' referenced before assignment