v8 test of lava-test-shell failed to run

The content of the v8.yaml:
   1 metadata:
   2 name: v8
   3 format: "Lava-Test-Shell Test Definition 1.0"
   4
   5 install:
   6 git-repos:
   7 - git://git.linaro.org/qa/test-definitions.git
   8
   9 run:
  10 steps:
  11 - "cd test-definitions/android/scripts"
  12 - "./v8.sh"
  13
  14 parse:
  15 pattern: "^(?P<test_case_id>.*?):\\s+(?P<measurement>\\d+)\\s*$"
  16 fixupdict:
  17 PASS: pass
  18 FAIL: fail

The job is http://validation.linaro.org/lava-server/scheduler/job/47272/log_file:

root@master [rc=0]# <LAVA_DISPATCHER>2013-02-07 06:00:40 AM WARNING: [ACTION-E] lava_test_shell is finished with error (ValidationError: Object lacks property 'result' object_expr='object.test_runs[0].test_results[0]', schema_expr='schema.properties.test_runs.items.properties.test_results.items.properties.result.optional')).
<LAVA_DISPATCHER>2013-02-07 06:00:40 AM INFO: Submitting the test result with parameters = {u'token': '<HIDDEN>', u'stream': u'/private/team/linaro/android-daily/', u'server': u'https://<email address hidden>/lava-server/RPC2/'}
<LAVA_DISPATCHER>2013-02-07 06:00:40 AM ERROR: Error adding host result bundle /tmp/tmp5looQy/lava-test-shellpRHQtp.bundle

Traceback (most recent call last):
  File "/srv/<email address hidden>/lava_dispatcher/actions/launch_control.py", line 159, in _get_results_from_host
    doc = DocumentIO.load(f)[1]
  File "/srv/lava/.cache/eggs/linaro_dashboard_bundle-1.8-py2.7.egg/linaro_dashboard_bundle/io.py", line 118, in load
    doc = json.load(stream, parse_float=decimal.Decimal, object_pairs_hook=object_pairs_hook)
  File "/srv/lava/.cache/eggs/simplejson-2.4.0-py2.7-linux-x86_64.egg/simplejson/__init__.py", line 372, in load
    use_decimal=use_decimal, **kw)
  File "/srv/lava/.cache/eggs/simplejson-2.4.0-py2.7-linux-x86_64.egg/simplejson/__init__.py", line 445, in loads
    return cls(encoding=encoding, **kw).decode(s)
  File "/srv/lava/.cache/eggs/simplejson-2.4.0-py2.7-linux-x86_64.egg/simplejson/decoder.py", line 402, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/srv/lava/.cache/eggs/simplejson-2.4.0-py2.7-linux-x86_64.egg/simplejson/decoder.py", line 420, in raw_decode
    raise JSONDecodeError("No JSON object could be decoded", s, idx)
JSONDecodeError: No JSON object could be decoded: line 1 column 0 (char 0)