https://cros-goldeneye.corp.google.com/chromeos/healthmonitoring/buildDetails?buildbucketId=8940530625538570448

betty-arc-next-pi-android-pfq has been red for a while.
This is because of Report stage failing with the following error:

20:50:03: INFO: Running cidb query on pid 28754, repr(query) starts with 'SELECT id, build_stage_id, outer_failure_id, exception_type, exception_message, exception_category,
20:50:03: ERROR: Traceback (most recent call last):
  File "/b/swarming/w/ir/cache/cbuild/repository/chromite/cbuildbot/stages/generic_stages.py", line 682, in Run
    self.PerformStage()
  File "/b/swarming/w/ir/cache/cbuild/repository/chromite/cbuildbot/stages/report_stages.py", line 998, in PerformStage
    self.ArchiveResults(final_status, build_id, db)
  File "/b/swarming/w/ir/cache/cbuild/repository/chromite/cbuildbot/stages/report_stages.py", line 899, in ArchiveResults
    self._SendPreCQInfraAlertMessageIfNeeded()
  File "/b/swarming/w/ir/cache/cbuild/repository/chromite/cbuildbot/stages/report_stages.py", line 654, in _SendPreCQInfraAlertMessageIfNeeded
    msg = self.GetBuildFailureMessage()
  File "/b/swarming/w/ir/cache/cbuild/repository/chromite/cbuildbot/stages/generic_stages.py", line 372, in GetBuildFailureMessage
    return self.GetBuildFailureMessageFromCIDB(build_id, db)
  File "/b/swarming/w/ir/cache/cbuild/repository/chromite/cbuildbot/stages/generic_stages.py", line 344, in GetBuildFailureMessageFromCIDB
    failure in stage_failures)
StopIteration

20:50:03: INFO: Translating result  to fail.