Log: 
https://chrome-swarming.appspot.com/task?id=3ca0e9186d4b1c10&refresh=10&show_raw=1

Traceback (most recent call last):
  RunBenchmark at /b/swarming/w/ir/third_party/catapult/telemetry/telemetry/internal/story_runner.py:357
    max_num_values=benchmark.MAX_NUM_VALUES)
  Run at /b/swarming/w/ir/third_party/catapult/telemetry/telemetry/internal/story_runner.py:220
    _RunStoryAndProcessErrorIfNeeded(story, results, state, test)
  _RunStoryAndProcessErrorIfNeeded at /b/swarming/w/ir/third_party/catapult/telemetry/telemetry/internal/story_runner.py:123
    state.RunStory(results)
  traced_function at /b/swarming/w/ir/third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py:52
    return func(*args, **kwargs)
  RunStory at /b/swarming/w/ir/third_party/catapult/telemetry/telemetry/page/shared_page_state.py:313
    self._current_page, self._current_tab, results)
  traced_function at /b/swarming/w/ir/third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py:75
    return func(*args, **kwargs)
  ValidateAndMeasurePage at /b/swarming/w/ir/tools/perf/measurements/smoothness.py:76
    metric.AddResults(model, renderer_thread, records, results)
  AddResults at /b/swarming/w/ir/third_party/catapult/telemetry/telemetry/web_perf/metrics/smoothness.py:54
    self.VerifyNonOverlappedRecords(interaction_records)
  VerifyNonOverlappedRecords at /b/swarming/w/ir/third_party/catapult/telemetry/telemetry/web_perf/metrics/timeline_based_metric.py:84
    if _TimeRangesHasOverlap(((r.start, r.end) for r in interaction_records)):
  _TimeRangesHasOverlap at /b/swarming/w/ir/third_party/catapult/telemetry/telemetry/web_perf/metrics/timeline_based_metric.py:19
    last_range = sorted_time_ranges[0]
IndexError: list index out of range

Locals:
  iterable_time_ranges : <generator object <genexpr> at 0x7f0dc803a050>
  sorted_time_ranges   : []