Filed by: btara [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer.html#?job_id=318501721&repo=autoland
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/KSIEkVT2TViu4Xo174PxdA/runs/0/artifacts/public/logs/live_backing.log

[task 2020-10-13T17:11:52.004Z] 17:11:52     INFO -  TEST-START | netwerk/test/unit/test_http3_trans_close.js
[task 2020-10-13T17:11:52.279Z] 17:11:52  WARNING -  TEST-UNEXPECTED-FAIL | netwerk/test/unit/test_http3_trans_close.js | xpcshell return code: 0
[task 2020-10-13T17:11:52.280Z] 17:11:52     INFO -  TEST-INFO took 273ms
[task 2020-10-13T17:11:52.280Z] 17:11:52     INFO -  >>>>>>>
[task 2020-10-13T17:11:52.280Z] 17:11:52     INFO -  (xpcshell/head.js) | test MAIN run_test pending (1)
[task 2020-10-13T17:11:52.280Z] 17:11:52     INFO -  (xpcshell/head.js) | test run_next_test 0 pending (2)
[task 2020-10-13T17:11:52.280Z] 17:11:52     INFO -  (xpcshell/head.js) | test MAIN run_test finished (2)
[task 2020-10-13T17:11:52.280Z] 17:11:52     INFO -  running event loop
[task 2020-10-13T17:11:52.280Z] 17:11:52     INFO -  netwerk/test/unit/test_http3_trans_close.js | Starting setup
[task 2020-10-13T17:11:52.280Z] 17:11:52     INFO -  (xpcshell/head.js) | test setup pending (2)
[task 2020-10-13T17:11:52.280Z] 17:11:52     INFO -  TEST-PASS | netwerk/test/unit/test_http3_trans_close.js | setup - [setup : 10] "50264" != null
[task 2020-10-13T17:11:52.280Z] 17:11:52     INFO -  TEST-PASS | netwerk/test/unit/test_http3_trans_close.js | setup - [setup : 10] "50264" != ""
[task 2020-10-13T17:11:52.280Z] 17:11:52     INFO -  (xpcshell/head.js) | test run_next_test 0 finished (2)
[task 2020-10-13T17:11:52.281Z] 17:11:52     INFO -  "CONSOLE_MESSAGE: (info) No chrome package registered for chrome://branding/locale/brand.properties"
[task 2020-10-13T17:11:52.281Z] 17:11:52     INFO -  PID 4930 | routed is NA
[task 2020-10-13T17:11:52.281Z] 17:11:52     INFO -  PID 4930 | try again to get alt svc mapping
[task 2020-10-13T17:11:52.281Z] 17:11:52     INFO -  PID 4930 | results=false
[task 2020-10-13T17:11:52.281Z] 17:11:52     INFO -  "CONSOLE_MESSAGE: (info) Alternate Service Mapping found: https://foo.example.com:-1 to https://foo.example.com:50264"
[task 2020-10-13T17:11:52.281Z] 17:11:52     INFO -  PID 4930 | routed is foo.example.com:50264
[task 2020-10-13T17:11:52.281Z] 17:11:52  WARNING -  TEST-UNEXPECTED-FAIL | netwerk/test/unit/test_http3_trans_close.js | setup - [setup : 1] "" == "h3"
[task 2020-10-13T17:11:52.281Z] 17:11:52     INFO -  -e:null:1
[task 2020-10-13T17:11:52.281Z] 17:11:52     INFO -  exiting test
[task 2020-10-13T17:11:52.281Z] 17:11:52     INFO -  PID 4930 | JavaScript error: /Users/cltbld/tasks/task_1602608079/build/tests/xpcshell/head.js, line 833: NS_ERROR_ABORT:
[task 2020-10-13T17:11:52.281Z] 17:11:52     INFO -  "CONSOLE_MESSAGE: (error) [JavaScript Error: "NS_ERROR_ABORT: " {file: "/Users/cltbld/tasks/task_1602608079/build/tests/xpcshell/head.js" line: 833}]
[task 2020-10-13T17:11:52.281Z] 17:11:52     INFO -  _abort_failed_test@/Users/cltbld/tasks/task_1602608079/build/tests/xpcshell/head.js:833:20
[task 2020-10-13T17:11:52.281Z] 17:11:52     INFO -  do_report_result@/Users/cltbld/tasks/task_1602608079/build/tests/xpcshell/head.js:934:5
[task 2020-10-13T17:11:52.281Z] 17:11:52     INFO -  Assert<@/Users/cltbld/tasks/task_1602608079/build/tests/xpcshell/head.js:73:21
[task 2020-10-13T17:11:52.281Z] 17:11:52     INFO -  proto.report@resource://testing-common/Assert.jsm:233:10
[task 2020-10-13T17:11:52.282Z] 17:11:52     INFO -  equal@resource://testing-common/Assert.jsm:275:8
[task 2020-10-13T17:11:52.282Z] 17:11:52     INFO -  testOnStopRequest@/Users/cltbld/tasks/task_1602608079/build/tests/xpcshell/tests/netwerk/test/unit/head_http3.js:67:14
[task 2020-10-13T17:11:52.282Z] 17:11:52     INFO -  _do_main@/Users/cltbld/tasks/task_1602608079/build/tests/xpcshell/head.js:248:6
[task 2020-10-13T17:11:52.282Z] 17:11:52     INFO -  _execute_test@/Users/cltbld/tasks/task_1602608079/build/tests/xpcshell/head.js:577:5
[task 2020-10-13T17:11:52.282Z] 17:11:52     INFO -  @-e:1:1
[task 2020-10-13T17:11:52.282Z] 17:11:52     INFO -  "
[task 2020-10-13T17:11:52.282Z] 17:11:52     INFO -  PID 4930 | cleanup done
[task 2020-10-13T17:11:52.282Z] 17:11:52     INFO -  <<<<<<<```

https://wiki.mozilla.org/Bug_Triage#Intermittent_Test_Failure_Cleanup
For more information, please visit auto_nag documentation.