https://findit-for-me.appspot.com/waterfall/flake?key=ag9zfmZpbmRpdC1mb3ItbWVy_gELEhdNYXN0ZXJGbGFrZUFuYWx5c2lzUm9vdCLHAWNocm9taXVtLmxpbnV4L0FuZHJvaWQgVGVzdHMgKGRiZykvNDIwMDQvY2hyb21lX3B1YmxpY190ZXN0X2FwayBvbiBBbmRyb2lkL2IzSm5MbU5vY205dGFYVnRMbU5vY205dFpTNWljbTkzYzJWeUxuZGxZbUZ3Y0hNdVYyVmlZWEJ3VTNCc1lYTm9VMk55WldWdVNHOXRaWE5qY21WbGJrbGpiMjVVWlhOMEkzUmxjM1JUYUc5M1JtRnNiR0poWTJ0SlkyOXUMCxITTWFzdGVyRmxha2VBbmFseXNpcxgBDA

Ran into exception:

Generator waterfall.process_flake_swarming_task_result_pipeline.ProcessFlakeSwarmingTaskResultPipeline(*(u'chromium.linux', u'Android Tests (dbg)', 42004, u'chrome_public_test_apk on Android', None, 42004, u'org.chromium.chrome.browser.webapps.WebappSplashScreenHomescreenIconTest#testShowFallbackIcon', ... (202 bytes), **{})#2c2ace26fa8440478b8580f194b23732 raised exception. AttributeError: 'NoneType' object has no attribute 'lower'
Traceback (most recent call last):
  File "/base/data/home/apps/s~findit-for-me/waterfall-backend:e7d4133f7.400652958982849367/first_party/pipeline_utils/appengine_third_party_pipeline_python_src_pipeline/pipeline.py", line 2158, in evaluate
    self, pipeline_key, root_pipeline_key, caller_output)
  File "/base/data/home/apps/s~findit-for-me/waterfall-backend:e7d4133f7.400652958982849367/first_party/pipeline_utils/appengine_third_party_pipeline_python_src_pipeline/pipeline.py", line 1113, in _run_internal
    return self.run(*self.args, **self.kwargs)
  File "/base/data/home/apps/s~findit-for-me/waterfall-backend:e7d4133f7.400652958982849367/waterfall/process_flake_swarming_task_result_pipeline.py", line 168, in run
    master_name, builder_name, build_number, step_name, task_id, *args)
  File "/base/data/home/apps/s~findit-for-me/waterfall-backend:e7d4133f7.400652958982849367/waterfall/process_base_swarming_task_result_pipeline.py", line 316, in run
    if task_id.lower() in (NO_TASK, NO_TASK_EXCEPTION):  # pragma: no branch
AttributeError: 'NoneType' object has no attribute 'lower'