Filed by: rmaries [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer.html#?job_id=312620076&repo=autoland
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/DwxFS67ZQVyLyBazoNngmA/runs/1/artifacts/public/logs/live_backing.log

[task 2020-08-10T17:52:54.527Z] 17:52:54 INFO - TEST-START | devtools/shared/resources/tests/browser_resources_several_resources.js
[task 2020-08-10T17:53:00.779Z] 17:53:00 INFO - TEST-PASS | devtools/shared/resources/tests/browser_resources_several_resources.js | The main process DevToolsServer has no pending connection when the test ends -
[task 2020-08-10T17:53:00.780Z] 17:53:00 INFO - Buffered messages finished
[task 2020-08-10T17:53:00.780Z] 17:53:00 INFO - TEST-UNEXPECTED-FAIL | devtools/shared/resources/tests/browser_resources_several_resources.js | A promise chain failed to handle a rejection: Connection closed, pending request to root, type listWorkers failed
[task 2020-08-10T17:53:00.780Z] 17:53:00 INFO -
[task 2020-08-10T17:53:00.780Z] 17:53:00 INFO - Request stack:
[task 2020-08-10T17:53:00.780Z] 17:53:00 INFO - request@resource://devtools/shared/protocol/Front.js:256:14
[task 2020-08-10T17:53:00.780Z] 17:53:00 INFO - generateRequestMethods/</frontProto[name]@resource://devtools/shared/protocol/Front/FrontClassWithSpec.js:47:19
[task 2020-08-10T17:53:00.781Z] 17:53:00 INFO - _workerListChanged@resource://devtools/shared/resources/legacy-target-watchers/legacy-workers-watcher.js:85:37
[task 2020-08-10T17:53:00.781Z] 17:53:00 INFO - _emit@resource://devtools/shared/event-emitter.js:226:34
[task 2020-08-10T17:53:00.781Z] 17:53:00 INFO - emit@resource://devtools/shared/event-emitter.js:172:18
[task 2020-08-10T17:53:00.782Z] 17:53:00 INFO - emit@resource://devtools/shared/event-emitter.js:324:18
[task 2020-08-10T17:53:00.782Z] 17:53:00 INFO - onPacket@resource://devtools/shared/protocol/Front.js:294:13
[task 2020-08-10T17:53:00.782Z] 17:53:00 INFO - onPacket@resource://devtools/client/devtools-client.js:492:13
[task 2020-08-10T17:53:00.782Z] 17:53:00 INFO - send/<@resource://devtools/shared/transport/local-transport.js:68:25
[task 2020-08-10T17:53:00.782Z] 17:53:00 INFO - exports.makeInfallible/<@resource://devtools/shared/ThreadSafeDevToolsUtils.js:103:22
[task 2020-08-10T17:53:00.782Z] 17:53:00 INFO - DevToolsUtils.executeSoon*exports.executeSoon@resource://devtools/shared/DevToolsUtils.js:47:21
[task 2020-08-10T17:53:00.782Z] 17:53:00 INFO - send@resource://devtools/shared/transport/local-transport.js:56:21
[task 2020-08-10T17:53:00.782Z] 17:53:00 INFO - send@resource://devtools/server/devtools-server-connection.js:99:20
[task 2020-08-10T17:53:00.782Z] 17:53:00 INFO - onWorkerListChanged@resource://devtools/server/actors/root.js:442:15
[task 2020-08-10T17:53:00.783Z] 17:53:00 INFO - _notifyListChanged@resource://devtools/server/actors/worker/worker-target-actor-list.js:184:10
[task 2020-08-10T17:53:00.783Z] 17:53:00 INFO - onUnregister@resource://devtools/server/actors/worker/worker-target-actor-list.js:200:12
[task 2020-08-10T17:53:00.783Z] 17:53:00 INFO - - stack: destroy@resource://devtools/shared/protocol/Front.js:77:23
[task 2020-08-10T17:53:00.783Z] 17:53:00 INFO - onClosed@resource://devtools/client/devtools-client.js:628:12
[task 2020-08-10T17:53:00.783Z] 17:53:00 INFO - close@resource://devtools/shared/transport/local-transport.js:169:20
[task 2020-08-10T17:53:00.783Z] 17:53:00 INFO - close@resource://devtools/shared/transport/local-transport.js:165:13
[task 2020-08-10T17:53:00.783Z] 17:53:00 INFO - close@resource://devtools/shared/transport/local-transport.js:165:13
[task 2020-08-10T17:53:00.784Z] 17:53:00 INFO - cleanup@resource://devtools/client/devtools-client.js:123:27
[task 2020-08-10T17:53:00.784Z] 17:53:00 INFO - close/promise<@resource://devtools/client/devtools-client.js:139:7
[task 2020-08-10T17:53:00.784Z] 17:53:00 INFO - close@resource://devtools/client/devtools-client.js:116:21
[task 2020-08-10T17:53:00.784Z] 17:53:00 INFO - @chrome://mochitests/content/browser/devtools/shared/resources/tests/browser_resources_several_resources.js:111:16