Filed by: apavel [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer?job_id=351057859&repo=mozilla-central
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/KbYmV83-Qb-6Ydj8sNXhfw/runs/0/artifacts/public/logs/live_backing.log

task 2021-09-09T17:54:33.791Z] 17:54:33     INFO - TEST-START | /editing/other/edit-in-textcontrol-immediately-after-hidden.tentative.html?editor=textarea&hide-target=parent
[task 2021-09-09T17:54:33.792Z] 17:54:33     INFO - Closing window 682d47e0-c7f4-f14d-89cc-3ae04c74fd1a
[task 2021-09-09T17:54:33.870Z] 17:54:33     INFO - {'actions': [{'type': 'none', 'actions': [{'type': 'pause', 'duration': 16}, {'type': 'pause', 'duration': 16}], 'id': '0'}, {'type': 'key', 'actions': [{'type': 'keyDown', 'value': 'a'}, {'type': 'keyUp', 'value': 'a'}], 'id': '1'}]}
[task 2021-09-09T17:54:33.982Z] 17:54:33     INFO - {'actions': [{'type': 'none', 'actions': [{'type': 'pause', 'duration': 16}, {'type': 'pause', 'duration': 16}], 'id': '2'}, {'type': 'key', 'actions': [{'type': 'keyDown', 'value': 'a'}, {'type': 'keyUp', 'value': 'a'}], 'id': '3'}]}
[task 2021-09-09T17:54:34.036Z] 17:54:34     INFO - {'actions': [{'type': 'none', 'actions': [{'type': 'pause', 'duration': 16}, {'type': 'pause', 'duration': 16}], 'id': '4'}, {'type': 'key', 'actions': [{'type': 'keyDown', 'value': 'a'}, {'type': 'keyUp', 'value': 'a'}], 'id': '5'}]}
[task 2021-09-09T17:54:34.155Z] 17:54:34     INFO - 
[task 2021-09-09T17:54:34.155Z] 17:54:34     INFO - TEST-PASS | /editing/other/edit-in-textcontrol-immediately-after-hidden.tentative.html?editor=textarea&hide-target=parent | Wait for load event 
[task 2021-09-09T17:54:34.155Z] 17:54:34     INFO - TEST-FAIL | /editing/other/edit-in-textcontrol-immediately-after-hidden.tentative.html?editor=textarea&hide-target=parent | execCommand("insertText", false, "typed value") in <textarea> - assert_equals: The value shouldn't be modified by "insertText" command expected "default value" but got "typed value"
[task 2021-09-09T17:54:34.155Z] 17:54:34     INFO - @http://web-platform.test:8000/editing/other/edit-in-textcontrol-immediately-after-hidden.tentative.html?editor=textarea&hide-target=parent:51:18
[task 2021-09-09T17:54:34.155Z] 17:54:34     INFO - Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2087:25
[task 2021-09-09T17:54:34.155Z] 17:54:34     INFO - promise_test/tests.promise_tests</<@http://web-platform.test:8000/resources/testharness.js:638:36
[task 2021-09-09T17:54:34.156Z] 17:54:34     INFO - promise_test/tests.promise_tests<@http://web-platform.test:8000/resources/testharness.js:637:20
[task 2021-09-09T17:54:34.156Z] 17:54:34     INFO - TEST-FAIL | /editing/other/edit-in-textcontrol-immediately-after-hidden.tentative.html?editor=textarea&hide-target=parent | execCommand("delete") in <textarea> - assert_equals: The value shouldn't be modified by "delete" command expected "default value" but got ""
[task 2021-09-09T17:54:34.156Z] 17:54:34     INFO - @http://web-platform.test:8000/editing/other/edit-in-textcontrol-immediately-after-hidden.tentative.html?editor=textarea&hide-target=parent:63:18
[task 2021-09-09T17:54:34.156Z] 17:54:34     INFO - Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2087:25
[task 2021-09-09T17:54:34.156Z] 17:54:34     INFO - promise_test/tests.promise_tests</<@http://web-platform.test:8000/resources/testharness.js:638:36
[task 2021-09-09T17:54:34.156Z] 17:54:34     INFO - promise_test/tests.promise_tests<@http://web-platform.test:8000/resources/testharness.js:637:20
[task 2021-09-09T17:54:34.156Z] 17:54:34     INFO - TEST-UNEXPECTED-PASS | /editing/other/edit-in-textcontrol-immediately-after-hidden.tentative.html?editor=textarea&hide-target=parent | <textarea> is hidden by "keydown" event listener - expected FAIL
[task 2021-09-09T17:54:34.156Z] 17:54:34     INFO - TEST-INFO | expected FAIL
[task 2021-09-09T17:54:34.159Z] 17:54:34     INFO - ..
[task 2021-09-09T17:54:34.159Z] 17:54:34     INFO - TEST-OK | /editing/other/edit-in-textcontrol-immediately-after-hidden.tentative.html?editor=textarea&hide-target=parent | took 368ms
[task 2021-09-09T17:54:34.162Z] 17:54:34     INFO - PID 1442 | 1631210074154	Marionette	INFO	Stopped listening on port 50664
[task 2021-09-09T17:54:34.347Z] 17:54:34     INFO - PID 1466 | console.warn: SearchSettings: "get: No settings file exists, new profile?" (new NotFoundError("Could not open the file at /var/folders/h5/2vq9847j2z51_w_vymktkx18000014/T/tmpmt7wja7i/search.json.mozlz4", (void 0)))
[task 2021-09-09T17:54:34.611Z] 17:54:34     INFO - PID 1442 | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2021-09-09T17:54:34.689Z] 17:54:34     INFO - Browser exited with return code 0
[task 2021-09-09T17:54:34.692Z] 17:54:34     INFO - Closing logging queue
[task 2021-09-09T17:54:34.693Z] 17:54:34     INFO - queue closed
[task 2021-09-09T17:54:34.717Z] 17:54:34     INFO - Application command: /opt/worker/tasks/task_163120983120138/build/application/Firefox Nightly.app/Contents/MacOS/firefox --marionette about:blank -foreground -profile /var/folders/h5/2vq9847j2z51_w_vymktkx18000014/T/tmpz749jyec
[task 2021-09-09T17:54:34.723Z] 17:54:34     INFO - Starting runner
[task 2021-09-09T17:54:35.090Z] 17:54:35     INFO - PID 1466 | 2021-09-09 17:54:35.088 firefox[1466:27695] 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 2021-09-09T17:54:35.214Z] 17:54:35     INFO - PID 1474 | 1631210075214	Marionette	INFO	Marionette enabled
[task 2021-09-09T17:54:35.403Z] 17:54:35     INFO - PID 1466 | 1631210075402	Marionette	INFO	Listening on port 50717