Filed by: mlaza [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer?job_id=376289655&repo=autoland
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/UqwaKBdcQ4Cln0q5E6qtKA/runs/0/artifacts/public/logs/live_backing.log

[task 2022-04-29T16:04:42.623Z] 16:04:42     INFO - TEST-START | /websockets/constructor/019.html?wpt_flags=h2
[task 2022-04-29T16:04:42.623Z] 16:04:42     INFO - Setting pref network.http.http2.websockets to false
[task 2022-04-29T16:04:42.634Z] 16:04:42     INFO - Setting pref network.http.http2.websockets to true
[task 2022-04-29T16:04:42.640Z] 16:04:42     INFO - Closing window 268cabad-a76e-4980-9017-9f2d0bae4951
[task 2022-04-29T16:04:53.696Z] 16:04:53     INFO - 
[task 2022-04-29T16:04:53.696Z] 16:04:53     INFO - TEST-UNEXPECTED-TIMEOUT | /websockets/constructor/019.html?wpt_flags=h2 | WebSockets: uppercase 'WS:' - Test timed out
[task 2022-04-29T16:04:53.697Z] 16:04:53     INFO - TEST-UNEXPECTED-TIMEOUT | /websockets/constructor/019.html?wpt_flags=h2 | expected OK
[task 2022-04-29T16:04:53.697Z] 16:04:53     INFO - TEST-INFO took 11074ms
[task 2022-04-29T16:04:53.699Z] 16:04:53     INFO - PID 3135 | 1651248293697	Marionette	INFO	Stopped listening on port 55249
[task 2022-04-29T16:04:54.070Z] 16:04:54     INFO - PID 3135 | ###!!! [Parent][PImageBridgeParent] Error: RunMessage(msgname=PImageBridge::Msg_WillClose) Channel closing: too late to send/recv, messages will be lost
[task 2022-04-29T16:04:54.111Z] 16:04:54     INFO - Browser exited with return code 0
[task 2022-04-29T16:04:54.114Z] 16:04:54     INFO - Closing logging queue
[task 2022-04-29T16:04:54.114Z] 16:04:54     INFO - queue closed
[task 2022-04-29T16:04:54.142Z] 16:04:54     INFO - Application command: /opt/worker/tasks/task_165124694694120/build/application/Firefox Nightly.app/Contents/MacOS/firefox --marionette about:blank -foreground -profile /var/folders/k0/pmymrl4j7s996wdntl_t1558000014/T/tmpe8s6n3w4
[task 2022-04-29T16:04:54.150Z] 16:04:54     INFO - PID 3145 | 1651248259663	Marionette	INFO	Marionette enabled
[task 2022-04-29T16:04:54.151Z] 16:04:54     INFO - PID 3145 | console.warn: SearchSettings: "get: No settings file exists, new profile?" (new NotFoundError("Could not open the file at /var/folders/k0/pmymrl4j7s996wdntl_t1558000014/T/tmpajsy45pq/search.json.mozlz4", (void 0)))
[task 2022-04-29T16:04:54.151Z] 16:04:54     INFO - PID 3145 | 1651248262118	Marionette	INFO	Listening on port 55291
[task 2022-04-29T16:04:54.152Z] 16:04:54     INFO - PID 3145 | 2022-04-29 16:04:49.631 firefox[3145:84240] Persistent UI failed to open file file:///Users/cltbld/Library/Saved%20Application%20State/org.mozilla.nightly.savedState/window_1.data: No such file or directory (2)
[task 2022-04-29T16:04:54.152Z] 16:04:54     INFO - Starting runner
[task 2022-04-29T16:04:54.779Z] 16:04:54     INFO - TEST-START | /websockets/constructor/019.html?wss