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Issue metadata

Status: Duplicate
Merged: issue 652724
Owner: ----
Closed: Nov 2016
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 1
Type: Bug



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AssertionError in list_of_scalar_values.py

Project Member Reported by rnep...@chromium.org, Oct 27 2016

Issue description

https://build.chromium.org/p/chromium.perf/builders/Mac%2010.10%20Perf%20%285%29/builds/5457/steps/blink_perf.dom.reference/logs/stdio

Traceback (most recent call last):
  RunBenchmark at /b/c/b/Mac_10_10_Perf__5_/src/third_party/catapult/telemetry/telemetry/internal/story_runner.py:341
    benchmark.ShouldTearDownStateAfterEachStorySetRun())
  Run at /b/c/b/Mac_10_10_Perf__5_/src/third_party/catapult/telemetry/telemetry/internal/story_runner.py:227
    _RunStoryAndProcessErrorIfNeeded(story, results, state, test)
  _RunStoryAndProcessErrorIfNeeded at /b/c/b/Mac_10_10_Perf__5_/src/third_party/catapult/telemetry/telemetry/internal/story_runner.py:86
    state.RunStory(results)
  traced_function at /b/c/b/Mac_10_10_Perf__5_/src/third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py:52
    return func(*args, **kwargs)
  RunStory at /b/c/b/Mac_10_10_Perf__5_/src/third_party/catapult/telemetry/telemetry/page/shared_page_state.py:313
    self._current_page, self._current_tab, results)
  traced_function at /b/c/b/Mac_10_10_Perf__5_/src/third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py:52
    return func(*args, **kwargs)
  ValidateAndMeasurePage at /b/c/b/Mac_10_10_Perf__5_/src/tools/perf/benchmarks/blink_perf.py:115
    results.current_page, metric, units, values))
  __init__ at /b/c/b/Mac_10_10_Perf__5_/src/third_party/catapult/telemetry/telemetry/value/list_of_scalar_values.py:83
    assert len(values) > 0
AssertionError

 
Ethan, do you know what maybe going on here? My first thought was a change to that file caused the reference build to not have data it expected. The revision range does not have any catapult rolls in it though. I also cannot bisect because it is only happening (consistently) in the reference build.

Link to run where it started to fail:
https://build.chromium.org/p/chromium.perf/builders/Mac%2010.10%20Perf%20%285%29/builds/5456
Ping. Or, if you are not the right person to ask about this, any suggestions on who I should talk to?
Looks like a browser crash actually. Not clear on the root cause; adding
more folks.
Cc: aiolos@chromium.org nedngu...@google.com
Mergedinto: 652724
Status: Duplicate (was: Untriaged)

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