Filed by: nfay [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer?job_id=366684106&repo=mozilla-central
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/FXuMFZgZSY65zAsiy_5iZg/runs/0/artifacts/public/logs/live_backing.log

[task 2022-02-04T05:45:39.047Z] 05:45:39     INFO - TEST-START | /html/canvas/offscreen/the-offscreen-canvas/2d.canvas.readonly.html
[task 2022-02-04T05:45:39.051Z] 05:45:39     INFO - Closing window edd3673b-4579-4245-9ac2-599d9c01c432
[task 2022-02-04T05:45:39.257Z] 05:45:39     INFO - 
[task 2022-02-04T05:45:39.257Z] 05:45:39     INFO - TEST-UNEXPECTED-PASS | /html/canvas/offscreen/the-offscreen-canvas/2d.canvas.readonly.html | canvas is readonly - expected FAIL
[task 2022-02-04T05:45:39.257Z] 05:45:39     INFO - TEST-INFO | expected FAIL
[task 2022-02-04T05:45:39.257Z] 05:45:39     INFO - TEST-OK | /html/canvas/offscreen/the-offscreen-canvas/2d.canvas.readonly.html | took 210ms
[task 2022-02-04T05:45:39.258Z] 05:45:39     INFO - PID 27689 | 1643953539256	Marionette	INFO	Stopped listening on port 57546
[task 2022-02-04T05:45:39.842Z] 05:45:39     INFO - Browser exited with return code 0
[task 2022-02-04T05:45:39.845Z] 05:45:39     INFO - Closing logging queue
[task 2022-02-04T05:45:39.845Z] 05:45:39     INFO - queue closed
[task 2022-02-04T05:45:39.869Z] 05:45:39     INFO - Application command: /builds/worker/workspace/build/application/firefox/firefox --marionette about:blank -profile /tmp/tmp40am9csv
[task 2022-02-04T05:45:39.882Z] 05:45:39     INFO - PID 28138 | 1643953538139	Marionette	INFO	Marionette enabled
[task 2022-02-04T05:45:39.883Z] 05:45:39     INFO - Starting runner
[task 2022-02-04T05:45:42.869Z] 05:45:42     INFO - PID 28138 | console.warn: SearchSettings: "get: No settings file exists, new profile?" (new NotFoundError("Could not open the file at /tmp/tmp5m7z7aso/search.json.mozlz4", (void 0)))
[task 2022-02-04T05:45:44.010Z] 05:45:44     INFO - PID 28138 | 1643953544009	Marionette	INFO	Listening on port 60615
[task 2022-02-04T05:45:44.308Z] 05:45:44     INFO - TEST-START | /html/canvas/offscreen/the-offscreen-canvas/2d.canvas.readonly.worker.html

Hello Andrew, could you take a look at these wpt failures, they keep failing on central but only as tier 2 for now.

There's another failure that popped up from the same regressed bug as it seems. This is the failure log .

The tests started to pass after support for partial
OffscreenCanvasRenderingContext2D for main and worker threads had landed in
bug 1746750.

Set release status flags based on info from the regressing bug 1746750

https://hg.mozilla.org/mozilla-central/rev/8bbfd1bb28f5