Error: https://pantheon.corp.google.com/errors/CMDP3pPMqLnehgE?time=P30D&project=findit-for-me

Stack trace: 
AttributeError: waterfall-backend:18183-8867ddd.413127644301637352/waterfall/buildbot.py:356 ExtractBuildInfo $$ 'unicode' object has no attribute 'get'
at ExtractBuildInfo (/waterfall/buildbot.py:356)
at GetBuildInfo (/waterfall/build_util.py:107)
at ScheduleAnalysisIfNeeded (/waterfall/flake/initialize_flake_pipeline.py:171)
at ScheduleAnalysisForFlake (waterfall/flake/flake_analysis_service.py:288)
at RunImpl (/pipelines/trigger_flake_analyses_pipeline.py:47)
at _RunImplWrapper (gae_libs/pipelines.py:232)
at Wrapped (/libs/exceptions.py:27)
at run (/gae_libs/pipelines.py:281)
at evaluate (/third_party/pipeline/pipeline.py:2207)