#[markdown(off)]
Filed by: shindli [at] mozilla.com

https://treeherder.mozilla.org/logviewer.html#?job_id=231121659&repo=mozilla-inbound

https://queue.taskcluster.net/v1/task/CKzACk4XT6iHJKJ8dJDN7w/runs/0/artifacts/public/logs/live_backing.log

00:24:20 INFO - Toggling node var_tarray
00:24:20 INFO - Toggling node var_set
00:24:20 INFO - Toggling node <entries>
00:24:20 INFO - TEST-PASS | devtools/client/debugger/new/test/mochitest/browser_dbg-worker-scopes.js | set elem0 -
00:24:20 INFO - Buffered messages logged at 16:24:17
00:24:20 INFO - TEST-PASS | devtools/client/debugger/new/test/mochitest/browser_dbg-worker-scopes.js | set elem1 -
00:24:20 INFO - Toggling node var_set
00:24:20 INFO - Toggling node var_map
00:24:20 INFO - Toggling node <entries>
00:24:20 INFO - Toggling node 0
00:24:20 INFO - TEST-PASS | devtools/client/debugger/new/test/mochitest/browser_dbg-worker-scopes.js | 1 -
00:24:20 INFO - TEST-PASS | devtools/client/debugger/new/test/mochitest/browser_dbg-worker-scopes.js | "one" -
00:24:20 INFO - Toggling node 0
00:24:20 INFO - Toggling node 1
00:24:20 INFO - TEST-PASS | devtools/client/debugger/new/test/mochitest/browser_dbg-worker-scopes.js | 2 -
00:24:20 INFO - TEST-PASS | devtools/client/debugger/new/test/mochitest/browser_dbg-worker-scopes.js | "two" -
00:24:20 INFO - Leaving test bound
00:24:20 INFO - Buffered messages logged at 16:24:20
00:24:20 INFO - Removing tab.
00:24:20 INFO - Waiting for event: 'TabClose' on [object XULElement].
00:24:20 INFO - Got event: 'TabClose' on [object XULElement].
00:24:20 INFO - Tab removed and finished closing
00:24:20 INFO - Buffered messages finished
00:24:20 INFO - TEST-UNEXPECTED-FAIL | devtools/client/debugger/new/test/mochitest/browser_dbg-worker-scopes.js | A promise chain failed to handle a rejection: Current state is running - stack: updateWorkers/<@resource://devtools/client/debugger/new/src/actions/debuggee.js:11:5
00:24:20 INFO - async*thunk/</</<@resource://devtools/client/debugger/new/src/actions/utils/middleware/thunk.js:21:45
00:24:20 INFO - bindActionCreator/<@resource://devtools/client/shared/vendor/redux.js:644:12
00:24:20 INFO - workerListChanged@resource://devtools/client/debugger/new/src/client/firefox/events.js:89:11
00:24:20 INFO - emit@resource://devtools/shared/event-emitter.js:186:24
00:24:20 INFO - emit@resource://devtools/shared/event-emitter.js:267:18
00:24:20 INFO - onPacket@resource://devtools/shared/protocol.js:1424:13
00:24:20 INFO - onPacket@resource://devtools/shared/client/debugger-client.js:601:13
00:24:20 INFO - send/<@resource://devtools/shared/transport/local-transport.js:64:23
00:24:20 INFO - exports.makeInfallible/<@resource://devtools/shared/ThreadSafeDevToolsUtils.js:109:22
00:24:20 INFO - DevToolsUtils.executeSoon*exports.executeSoon@resource://devtools/shared/DevToolsUtils.js:55:21
00:24:20 INFO - send@resource://devtools/shared/transport/local-transport.js:58:21
00:24:20 INFO - send@resource://devtools/server/main.js:1023:20
00:24:20 INFO - receiveMessage@resource://devtools/shared/transport/child-transport.js:66:16
00:24:20 INFO - MessageListener.receiveMessage*_addListener@resource://devtools/shared/transport/child-transport.js:40:14
00:24:20 INFO - ready@resource://devtools/shared/transport/child-transport.js:57:10
00:24:20 INFO - connectToFrame/</onActorCreated<@resource://devtools/server/main.js:730:24
00:24:20 INFO - exports.makeInfallible/<@resource://devtools/shared/ThreadSafeDevToolsUtils.js:109:22
00:24:20 INFO - MessageListener.receiveMessage*trackMessageManager@resource://devtools/server/main.js:612:14
00:24:20 INFO - connectToFrame/<@resource://devtools/server/main.js:825:7

Resolved by backout:
https://hg.mozilla.org/mozilla-central/rev/e3762382f7906a9389f3dd890b07a2bfbad17227

https://treeherder.mozilla.org/logviewer.html#/jobs?job_id=241091080&repo=mozilla-inbound&lineNumber=2797

It seems that https://treeherder.mozilla.org/#/jobs?repo=mozilla-inbound&revision=0ad12e8fb98c2c20a249cdd9bed5e032a71c500f&selectedJob=241091080 caused these failures.

Brian, can you please confirm that https://bugzilla.mozilla.org/show_bug.cgi?id=1533202 is the culprit?

Thank you

https://hg.mozilla.org/mozilla-central/rev/2d41d7ccab74