Filed by: nbeleuzu [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer?job_id=370807380&repo=mozilla-central
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/RfoTv-ynSmiSNsqqDYtVSg/runs/0/artifacts/public/logs/live_backing.log

[task 2022-03-13T00:34:47.313Z] 00:34:47     INFO - TEST-PASS | devtools/client/shared/test/browser_dbg_worker-console-03.js | Text for message appeared correct - 
[task 2022-03-13T00:34:47.313Z] 00:34:47     INFO - Terminating worker with url 'code_WorkerTargetActor.attachThread-worker.js' in tab.
[task 2022-03-13T00:34:47.313Z] 00:34:47     INFO - Waiting for worker to close.
[task 2022-03-13T00:34:47.314Z] 00:34:47     INFO - Worker did close.
[task 2022-03-13T00:34:47.314Z] 00:34:47     INFO - Buffered messages logged at 00:34:47
[task 2022-03-13T00:34:47.314Z] 00:34:47     INFO - Waiting for client to close.
[task 2022-03-13T00:34:47.314Z] 00:34:47     INFO - 
[task 2022-03-13T00:34:47.315Z] 00:34:47     INFO - Removing tab.
[task 2022-03-13T00:34:47.315Z] 00:34:47     INFO - Tab removed and finished closing.
[task 2022-03-13T00:34:47.315Z] 00:34:47     INFO - Buffered messages finished
[task 2022-03-13T00:34:47.317Z] 00:34:47     INFO - TEST-UNEXPECTED-FAIL | devtools/client/shared/test/browser_dbg_worker-console-03.js | A promise chain failed to handle a rejection: Parser: source source-server0.conn9.windowGlobal169/workerDescriptor23/source6 was not provided. - stack: _onMessage/<@resource://devtools/client/shared/worker-utils.js:91:21
[task 2022-03-13T00:34:47.317Z] 00:34:47     INFO - _onMessage@resource://devtools/client/shared/worker-utils.js:87:20
[task 2022-03-13T00:34:47.317Z] 00:34:47     INFO - EventListener.handleEvent*start@resource://devtools/client/shared/worker-utils.js:21:17
[task 2022-03-13T00:34:47.317Z] 00:34:47     INFO - bootstrapWorkers@resource://devtools/client/debugger/src/utils/bootstrap.js:89:10
[task 2022-03-13T00:34:47.317Z] 00:34:47     INFO - bootstrap@resource://devtools/client/debugger/src/main.js:93:51
[task 2022-03-13T00:34:47.317Z] 00:34:47     INFO - async*open@resource://devtools/client/debugger/panel.js:68:38
[task 2022-03-13T00:34:47.317Z] 00:34:47     INFO - async*onLoad@resource://devtools/client/framework/toolbox.js:2693:27
[task 2022-03-13T00:34:47.317Z] 00:34:47     INFO - Rejection date: Sun Mar 13 2022 00:34:44 GMT+0000 (Greenwich Mean Time) - false == true - JS frame :: resource://testing-common/PromiseTestUtils.jsm :: assertNoUncaughtRejections :: line 271
[task 2022-03-13T00:34:47.318Z] 00:34:47     INFO - Stack trace:
[task 2022-03-13T00:34:47.318Z] 00:34:47     INFO - resource://testing-common/PromiseTestUtils.jsm:assertNoUncaughtRejections:271
[task 2022-03-13T00:34:47.318Z] 00:34:47     INFO - chrome://mochikit/content/browser-test.js:handleTask:1017
[task 2022-03-13T00:34:47.318Z] 00:34:47     INFO - chrome://mochikit/content/browser-test.js:_runTaskBasedTest:1061
[task 2022-03-13T00:34:47.318Z] 00:34:47     INFO - chrome://mochikit/content/browser-test.js:Tester_execTest:1189
[task 2022-03-13T00:34:47.318Z] 00:34:47     INFO - chrome://mochikit/content/browser-test.js:nextTest/<:978
[task 2022-03-13T00:34:47.318Z] 00:34:47     INFO - chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:SimpleTest.waitForFocus/<:1041
[task 2022-03-13T00:34:47.319Z] 00:34:47     INFO - Leaving test bound testPausedByConsole
[task 2022-03-13T00:34:47.319Z] 00:34:47     INFO - GECKO(6912) | JavaScript error: , line 0: NotFoundError: No such JSWindowActor 'DevToolsFrame'
[task 2022-03-13T00:34:47.322Z] 00:34:47     INFO - Console message: [JavaScript Error: "TypeError: can't access property "destructor", loader is undefined" {file: "resource://devtools/shared/loader/base-loader.js" line: 449}]
[task 2022-03-13T00:34:47.322Z] 00:34:47     INFO - unload@resource://devtools/shared/loader/base-loader.js:449:21
[task 2022-03-13T00:34:47.322Z] 00:34:47     INFO - destroy@resource://devtools/shared/loader/Loader.jsm:151:11
[task 2022-03-13T00:34:47.322Z] 00:34:47     INFO - didDestroy@resource://devtools/server/connectors/js-window-actor/DevToolsFrameChild.jsm:725:19
[task 2022-03-13T00:34:47.322Z] 00:34:47     INFO - unregisterJSWindowActor@resource://devtools/server/actors/watcher/WatcherRegistry.jsm:367:17
[task 2022-03-13T00:34:47.322Z] 00:34:47     INFO - maybeUnregisteringJSWindowActor@resource://devtools/server/actors/watcher/WatcherRegistry.jsm:300:7
[task 2022-03-13T00:34:47.322Z] 00:34:47     INFO - unwatchResources@resource://devtools/server/actors/watcher.js:645:21

The Bugbug bot thinks this bug should belong to the 'DevTools::Debugger' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

This looks to be from Bug 1754407, fails only on windows10-64-2004-ccov-qr.