https://build.chromium.org/p/chromium.perf/buildslaves/slave79-c1

This happens for almost every alernate job on the slave .

Traceback (most recent call last):
  File "/b/build/scripts/slave/upload_goma_logs.py", line 110, in <module>
    sys.exit(main())
  File "/b/build/scripts/slave/upload_goma_logs.py", line 98, in main
    assert args.json_status is not None and os.path.exists(args.json_status)
AssertionError