Most recent failing builder: 
https://uberchromegw.corp.google.com/i/chromium.perf.fyi/builders/Win%2010%20Low-End%20Perf%20Tests/builds/1125

Link to failing log: https://chromium-swarm.appspot.com/user/task/3266cfda3566a810

Seems to be hitting the maxium recursion depth, See trucated log below.  

Ethan Ben do you have any insight as to why this might be failing on a windows bot or what condition it is looking for to exit the recursion?

WARNING:root:Please specify the TBMv1 metrics you are interested in explicitly. This implicit functionality will be removed on July 17, 2016.
WARNING:root:No importer found for TraceDataPart("telemetry")
INFO:root:*************** BROWSER STANDARD OUTPUT ***************
INFO:root:
INFO:root:*********** END OF BROWSER STANDARD OUTPUT ************
INFO:root:********************* BROWSER LOG *********************
INFO:root:No log file
INFO:root:***************** END OF BROWSER LOG ******************
Traceback (most recent call last):
  File "c:\b\s\w\irkucyq7\third_party\catapult\telemetry\telemetry\internal\story_runner.py", line 89, in _RunStoryAndProcessErrorIfNeeded
    test.Measure(state.platform, results)
  File "c:\b\s\w\irkucyq7\third_party\catapult\telemetry\telemetry\web_perf\timeline_based_measurement.py", line 301, in Measure
    self._ComputeLegacyTimelineBasedMetrics(results, trace_result)
  File "c:\b\s\w\irkucyq7\third_party\catapult\telemetry\telemetry\web_perf\timeline_based_measurement.py", line 329, in _ComputeLegacyTimelineBasedMetrics
    model = model_module.TimelineModel(trace_result)
  File "c:\b\s\w\irkucyq7\third_party\catapult\telemetry\telemetry\timeline\model.py", line 75, in __init__
    self.ImportTraces(trace_data, shift_world_to_zero=shift_world_to_zero)
  File "c:\b\s\w\irkucyq7\third_party\catapult\telemetry\telemetry\timeline\model.py", line 158, in ImportTraces
    self.FinalizeImport(shift_world_to_zero, importers)
  File "c:\b\s\w\irkucyq7\third_party\catapult\telemetry\telemetry\timeline\model.py", line 173, in FinalizeImport
    process.FinalizeImport()
............
............
.........
    if self._AddSliceIfBounds(root.sub_slices[-1], child):
  _AddSliceIfBounds at c:\b\s\w\irkucyq7\third_party\catapult\telemetry\telemetry\timeline\thread.py:263
    if self._AddSliceIfBounds(root.sub_slices[-1], child):
  _AddSliceIfBounds at c:\b\s\w\irkucyq7\third_party\catapult\telemetry\telemetry\timeline\thread.py:259
    child_end_micros = round(child.end * 1000)
RuntimeError: maximum recursion depth exceeded