Filed by: nerli [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer?job_id=346817455&repo=autoland
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/JRIIwAxWQ8ydP1EZ9pY_tQ/runs/0/artifacts/public/logs/live_backing.log
Reftest URL: https://hg.mozilla.org/mozilla-central/raw-file/tip/layout/tools/reftest/reftest-analyzer.xhtml#logurl=https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/JRIIwAxWQ8ydP1EZ9pY_tQ/runs/0/artifacts/public/logs/live_backing.log&only_show_unexpected=1

[task 2021-07-29T23:35:01.194Z] 23:35:01     INFO - TEST-UNEXPECTED-FAIL | browser/components/preferences/tests/browser_browser_languages_subdialog.js | The second dialog id is larger than the first - 
[task 2021-07-29T23:35:01.194Z] 23:35:01     INFO - Stack trace:
[task 2021-07-29T23:35:01.194Z] 23:35:01     INFO - chrome://mochikit/content/browser-test.js:test_ok:1343
[task 2021-07-29T23:35:01.194Z] 23:35:01     INFO - chrome://mochitests/content/browser/browser/components/preferences/tests/browser_browser_languages_subdialog.js:testReorderingBrowserLanguages:415
[task 2021-07-29T23:35:01.246Z] 23:35:01     INFO - GECKO(10912) | [Parent 9900, Main Thread] WARNING: '!inner', file /builds/worker/checkouts/gecko/dom/ipc/jsactor/JSWindowActorProtocol.cpp:184
[task 2021-07-29T23:35:01.253Z] 23:35:01     INFO - TEST-PASS | browser/components/preferences/tests/browser_browser_languages_subdialog.js | Got parent telemetry events in the snapshot - 
[task 2021-07-29T23:35:01.255Z] 23:35:01     INFO - TEST-PASS | browser/components/preferences/tests/browser_browser_languages_subdialog.js | The events are recorded correctly - [["manage","main","9773"],["reorder","dialog","9773"],["accept","dialog","9773"],["manage","main","10367"],["reorder","dialog","10367"],["accept","dialog","10367"]] deepEqual [["manage","main","9773"],["reorder","dialog","9773"],["accept","dialog","9773"],["manage","main","10367"],["reorder","dialog","10367"],["accept","dialog","10367"]] - 
[task 2021-07-29T23:35:01.255Z] 23:35:01     INFO - Leaving test bound testReorderingBrowserLanguages
[task 2021-07-29T23:35:01.256Z] 23:35:01     INFO - Entering test bound testAddAndRemoveSelectedLanguages
[task 2021-07-29T23:35:01.291Z] 23:35:01     INFO - GECKO(10912) | [Parent 9900, Main Thread] WARNING: NS_ENSURE_TRUE(sgo || !hasHad) failed: file /builds/worker/checkouts/gecko/dom/base/nsContentUtils.cpp:5280
[task 2021-07-29T23:35:01.292Z] 23:35:01     INFO - GECKO(10912) | [Parent 9900, Main Thread] WARNING: NS_ENSURE_TRUE(sgo || !hasHad) failed: file /builds/worker/checkouts/gecko/dom/base/nsContentUtils.cpp:5280
[task 2021-07-29T23:35:01.292Z] 23:35:01     INFO - GECKO(10912) | [Parent 9900, Main Thread] WARNING: NS_ENSURE_TRUE(sgo || !hasHad) failed: file /builds/worker/checkouts/gecko/dom/base/nsContentUtils.cpp:5280
[task 2021-07-29T23:35:01.294Z] 23:35:01     INFO - GECKO(10912) | [Parent 9900, Main Thread] WARNING: NS_ENSURE_TRUE(sgo || !hasHad) failed: file /builds/worker/checkouts/gecko/dom/base/nsContentUtils.cpp:5280
[task 2021-07-29T23:35:01.294Z] 23:35:01     INFO - GECKO(10912) | [Parent 9900, Main Thread] WARNING: NS_ENSURE_TRUE(sgo || !hasHad) failed: file /builds/worker/checkouts/gecko/dom/base/nsContentUtils.cpp:5280
[task 2021-07-29T23:35:01.295Z] 23:35:01     INFO - GECKO(10912) | [Parent 9900, Main Thread] WARNING: NS_ENSURE_TRUE(sgo || !hasHad) failed: file /builds/worker/checkouts/gecko/dom/base/nsContentUtils.cpp:5280
[task 2021-07-29T23:35:01.296Z] 23:35:01     INFO - GECKO(10912) | [Parent 9900, Main Thread] WARNING: NS_ENSURE_TRUE(sgo || !hasHad) failed: file /builds/worker/checkouts/gecko/dom/base/nsContentUtils.cpp:5280
[task 2021-07-29T23:35:01.296Z] 23:35:01     INFO - GECKO(10912) | [Parent 9900, Main Thread] WARNING: NS_ENSURE_TRUE(sgo || !hasHad) failed: file /builds/worker/checkouts/gecko/dom/base/nsContentUtils.cpp:5280
[task 2021-07-29T23:35:01.297Z] 23:35:01     INFO - GECKO(10912) | [Parent 9900, Main Thread] WARNING: NS_ENSURE_TRUE(sgo || !hasHad) failed: file /builds/worker/checkouts/gecko/dom/base/nsContentUtils.cpp:5280

Set release status flags based on info from the regressing bug 1672317

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