Log:
Traceback (most recent call last):
  RunBenchmark at c:\b\s\w\ir\third_party\catapult\telemetry\telemetry\internal\story_runner.py:369
    expectations=expectations, max_num_values=benchmark.MAX_NUM_VALUES)
  Run at c:\b\s\w\ir\third_party\catapult\telemetry\telemetry\internal\story_runner.py:234
    _RunStoryAndProcessErrorIfNeeded(story, results, state, test)
  _RunStoryAndProcessErrorIfNeeded at c:\b\s\w\ir\third_party\catapult\telemetry\telemetry\internal\story_runner.py:117
    test.WillRunStory(state.platform)
  WillRunStory at c:\b\s\w\ir\third_party\catapult\telemetry\telemetry\web_perf\timeline_based_measurement.py:255
    platform.tracing_controller.StartTracing(self._tbm_options.config)
  StartTracing at c:\b\s\w\ir\third_party\catapult\telemetry\telemetry\core\tracing_controller.py:43
    self._tracing_controller_backend.StartTracing(tracing_config, timeout)
  StartTracing at c:\b\s\w\ir\third_party\catapult\telemetry\telemetry\internal\platform\tracing_controller_backend.py:108
    if agent.StartAgentTracing(config, timeout):
  StartAgentTracing at c:\b\s\w\ir\third_party\catapult\telemetry\telemetry\internal\platform\tracing_agent\chrome_tracing_agent.py:124
    started_devtools_tracing = self._StartDevToolsTracing(config, timeout)
  _StartDevToolsTracing at c:\b\s\w\ir\third_party\catapult\telemetry\telemetry\internal\platform\tracing_agent\chrome_tracing_agent.py:101
    client.StartChromeTracing(config, timeout)
  StartChromeTracing at c:\b\s\w\ir\third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\devtools_client_backend.py:451
    trace_config.chrome_trace_config, timeout)
  StartTracing at c:\b\s\w\ir\third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\tracing_backend.py:117
    assert not self._can_collect_data, 'Data not collected from last trace.'
AssertionError: Data not collected from last trace.

Locals:
  chrome_trace_config : <telemetry.timeline.chrome_trace_config.ChromeTraceConfig object at 0x0000000008671D30>
  timeout             : 10


https://chrome-swarming.appspot.com/task?id=3f9597ede0b1d610&refresh=10&show_raw=1

Build: https://ci.chromium.org/buildbot/chromium.perf/win-10-perf/387