Duping from https://github.com/catapult-project/catapult/issues/4591 since I heard rumors that monorail is the right place to report pinpoint bugs.

See https://crbug.com/887253#c13. Bisection always fails with:

crying_cat_face Pinpoint job stopped with an error.
https://pinpoint-dot-chromeperf.appspot.com/job/13b7ee8ce40000

HTTP status code 401: Login Required

An example failure: https://pinpoint-dot-chromeperf.appspot.com/job/13b7ee8ce40000