https://build.chromium.org/p/chromium.infra.cron/builders/wpt-importer/builds/485

From the logs:

Traceback (most recent call last):
  File "/mnt/data/b/rr/tmpecZlTR/w/src/third_party/WebKit/Tools/Scripts/wpt-import", line 18, in <module>
    host.exit(importer.main())
  File "/mnt/data/b/rr/tmpecZlTR/w/src/third_party/WebKit/Tools/Scripts/webkitpy/w3c/test_importer.py", line 130, in main
    if not self.run_commit_queue_for_cl():
  File "/mnt/data/b/rr/tmpecZlTR/w/src/third_party/WebKit/Tools/Scripts/webkitpy/w3c/test_importer.py", line 172, in run_commit_queue_for_cl
    timeout_seconds=TIMEOUT_SECONDS)
  File "/mnt/data/b/rr/tmpecZlTR/w/src/third_party/WebKit/Tools/Scripts/webkitpy/common/net/git_cl.py", line 83, in wait_for_try_jobs
    try_results = self.try_job_results()
  File "/mnt/data/b/rr/tmpecZlTR/w/src/third_party/WebKit/Tools/Scripts/webkitpy/common/net/git_cl.py", line 119, in try_job_results
    raw_results = self.fetch_raw_try_job_results()
  File "/mnt/data/b/rr/tmpecZlTR/w/src/third_party/WebKit/Tools/Scripts/webkitpy/common/net/git_cl.py", line 136, in fetch_raw_try_job_results
    self.run(['try-results', '--json', results_path])
  File "/mnt/data/b/rr/tmpecZlTR/w/src/third_party/WebKit/Tools/Scripts/webkitpy/common/net/git_cl.py", line 51, in run
    return self._host.executive.run_command(command, cwd=self._cwd)
  File "/mnt/data/b/rr/tmpecZlTR/w/src/third_party/WebKit/Tools/Scripts/webkitpy/common/system/executive.py", line 326, in run_command
    (error_handler or self.default_error_handler)(script_error)
  File "/mnt/data/b/rr/tmpecZlTR/w/src/third_party/WebKit/Tools/Scripts/webkitpy/common/system/executive.py", line 234, in default_error_handler
    raise error
webkitpy.common.system.executive.ScriptError: Failed to run "['git', 'cl', 'try-results', '--json', '/mnt/data/b/rr/tmpecZlTR/t/tmp6UlihE/try-results.json']" exit_code: 1
output: Warning: Some results might be missing because You are not logged in. Please login first by running:
  depot-tools-auth login chromium-review.googlesource.com
Buildbucket error: Error in response. Reason: . Message: .
step returned non-zero exit code: 1

This is the first time I've seen this failure.