Filed by: aciure [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer.html#?job_id=283614076&repo=autoland
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/GCw3wSnDQx-LYUcf7J5oRA/runs/0/artifacts/public/logs/live_backing.log

[task 2020-01-06T13:50:23.620Z] 13:50:23 INFO - TEST-START | /content-security-policy/navigate-to/unsafe-allow-redirects/blocked-end-of-chain.sub.html
[task 2020-01-06T13:50:23.628Z] 13:50:23 INFO - Closing window 10
[task 2020-01-06T13:50:24.171Z] 13:50:24 WARNING - Traceback (most recent call last):
[task 2020-01-06T13:50:24.171Z] 13:50:24 WARNING - File "/builds/worker/workspace/build/venv/lib/python2.7/site-packages/wptserve/handlers.py", line 314, in call
[task 2020-01-06T13:50:24.172Z] 13:50:24 WARNING - rv = self.func(request, response)
[task 2020-01-06T13:50:24.172Z] 13:50:24 WARNING - File "/builds/worker/workspace/build/tests/web-platform/tests/content-security-policy/support/report.py", line 50, in main
[task 2020-01-06T13:50:24.173Z] 13:50:24 WARNING - request.server.stash.take(key=key)
[task 2020-01-06T13:50:24.174Z] 13:50:24 WARNING - File "/builds/worker/workspace/build/venv/lib/python2.7/site-packages/wptserve/stash.py", line 175, in take
[task 2020-01-06T13:50:24.175Z] 13:50:24 WARNING - internal_key = self._wrap_key(key, path)
[task 2020-01-06T13:50:24.176Z] 13:50:24 WARNING - File "/builds/worker/workspace/build/venv/lib/python2.7/site-packages/wptserve/stash.py", line 150, in _wrap_key
[task 2020-01-06T13:50:24.176Z] 13:50:24 WARNING - return (str(path), str(uuid.UUID(key)))
[task 2020-01-06T13:50:24.177Z] 13:50:24 WARNING - File "/usr/lib/python2.7/uuid.py", line 136, in init
[task 2020-01-06T13:50:24.178Z] 13:50:24 WARNING - raise ValueError('badly formed hexadecimal UUID string')
[task 2020-01-06T13:50:24.178Z] 13:50:24 WARNING - ValueError: badly formed hexadecimal UUID string
[task 2020-01-06T13:50:24.178Z] 13:50:24 WARNING -
[task 2020-01-06T13:50:54.343Z] 13:50:54 INFO - .
[task 2020-01-06T13:50:54.343Z] 13:50:54 INFO - TEST-TIMEOUT | /content-security-policy/navigate-to/unsafe-allow-redirects/blocked-end-of-chain.sub.html | took 30721ms
[task 2020-01-06T13:50:55.695Z] 13:50:55 INFO - Closing logging queue
[task 2020-01-06T13:50:55.695Z] 13:50:55 INFO - queue closed
[task 2020-01-06T13:50:55.711Z] 13:50:55 INFO - Setting up ssl
[task 2020-01-06T13:50:55.807Z] 13:50:55 INFO - certutil |
[task 2020-01-06T13:50:55.888Z] 13:50:55 INFO - certutil |
[task 2020-01-06T13:50:55.909Z] 13:50:55 INFO - certutil |
[task 2020-01-06T13:50:55.909Z] 13:50:55 INFO - Certificate Nickname Trust Attributes
[task 2020-01-06T13:50:55.909Z] 13:50:55 INFO - SSL,S/MIME,JAR/XPI
[task 2020-01-06T13:50:55.909Z] 13:50:55 INFO -
[task 2020-01-06T13:50:55.909Z] 13:50:55 INFO - web-platform-tests CT,,
[task 2020-01-06T13:50:55.909Z] 13:50:55 INFO -
[task 2020-01-06T13:50:58.958Z] 13:50:58 INFO - adb Granting important runtime permissions to org.mozilla.geckoview.test
[task 2020-01-06T13:51:00.837Z] 13:51:00 INFO - adb launch_application: am start -W -n org.mozilla.geckoview.test/org.mozilla.geckoview.test.TestRunnerActivity -a android.intent.action.MAIN --es env9 MOZ_DISABLE_NONLOCAL_CONNECTIONS=1 --es env8 R_LOG_DESTINATION=stderr --es args "-no-remote -profile /sdcard/tests/profile --marionette about:blank" --es env3 MOZ_HIDE_RESULTS_TABLE=1 --es env2 R_LOG_VERBOSE=1 --es env1 MOZ_WEBRENDER=0 --es env0 MOZ_CRASHREPORTER=1 --es env7 MOZ_CRASHREPORTER_SHUTDOWN=1 --es env6 MOZ_IN_AUTOMATION=1 --es env5 MOZ_LOG=signaling:3,mtransport:4,DataChannel:4,jsep:4 --es env4 STYLO_THREADS=4 --ez use_multiprocess True --es env12 R_LOG_LEVEL=6 --es env11 MOZ_PROCESS_LOG=/tmp/tmpbB8zEHpidlog --es env10 MOZ_CRASHREPORTER_NO_REPORT=1
[task 2020-01-06T13:51:02.654Z] 13:51:02 INFO - Starting runner
[task 2020-01-06T13:51:03.366Z] 13:51:03 INFO - TEST-START | /content-security-policy/script-src-attr-elem/script-src-attr-allowed-src-blocked.html
[task 2020-01-06T13:51:04.247Z] 13:51:04 INFO - .
[task 2020-01-06T13:51:04.247Z] 13:51:04 INFO - TEST-OK | /content-security-policy/script-src-attr-elem/script-src-attr-allowed-src-blocked.html | took 879ms

This probably is related to bug 1606865.