1750446 - Intermittent devtools/client/inspector/rules/test/browser_rules_custom.js | Uncaught exception - at <>/test/head.js:1042 - TypeError: can't access property "_ruleEditor", view.element.children[childrenIndex] is undefined

Status: RESOLVED FIXED

(DevTools :: Inspector: Rules, defect, P5)

Description

[Treeherder Bug Filer]

Filed by: ncsoregi [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer?job_id=364281698&repo=mozilla-central
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/Af3PDzm1Roua486y4K_PbA/runs/5/artifacts/public/logs/live_backing.log

---

[task 2022-01-16T13:30:13.250Z] 13:30:13     INFO - TEST-PASS | devtools/client/inspector/rules/test/browser_rules_custom.js | Class property should be overridden - 
[task 2022-01-16T13:30:13.250Z] 13:30:13     INFO - Selecting the node for '#testidImportant'
[task 2022-01-16T13:30:13.250Z] 13:30:13     INFO - Console message: [JavaScript Warning: "Empty string passed to getElementById()." {file: "chrome://global/content/elements/browser-custom-element.js" line: 391}]
[task 2022-01-16T13:30:13.251Z] 13:30:13     INFO - Buffered messages finished
[task 2022-01-16T13:30:13.251Z] 13:30:13     INFO - TEST-UNEXPECTED-FAIL | devtools/client/inspector/rules/test/browser_rules_custom.js | Uncaught exception - at chrome://mochitests/content/browser/devtools/client/inspector/test/head.js:1042 - TypeError: can't access property "_ruleEditor", view.element.children[childrenIndex] is undefined
[task 2022-01-16T13:30:13.251Z] 13:30:13     INFO - Stack trace:
[task 2022-01-16T13:30:13.251Z] 13:30:13     INFO - getRuleViewRuleEditor@chrome://mochitests/content/browser/devtools/client/inspector/test/head.js:1042:1
[task 2022-01-16T13:30:13.251Z] 13:30:13     INFO - importantCustomOverride@chrome://mochitests/content/browser/devtools/client/inspector/rules/test/browser_rules_custom.js:66:39
[task 2022-01-16T13:30:13.251Z] 13:30:13     INFO - async*@chrome://mochitests/content/browser/devtools/client/inspector/rules/test/browser_rules_custom.js:15:9
[task 2022-01-16T13:30:13.251Z] 13:30:13     INFO - Async*Tester_execTest/<@chrome://mochikit/content/browser-test.js:1130:34
[task 2022-01-16T13:30:13.251Z] 13:30:13     INFO - Tester_execTest@chrome://mochikit/content/browser-test.js:1170:11
[task 2022-01-16T13:30:13.251Z] 13:30:13     INFO - nextTest/<@chrome://mochikit/content/browser-test.js:978:14
[task 2022-01-16T13:30:13.251Z] 13:30:13     INFO - SimpleTest.waitForFocus/<@chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:1041:13
[task 2022-01-16T13:30:13.251Z] 13:30:13     INFO - Leaving test bound 
[task 2022-01-16T13:30:13.695Z] 13:30:13     INFO - GECKO(4271) | console.error: "Exception while getting unique selector" (new Error("Connection closed, pending request to server0.conn72.windowGlobal10737418264/domnode33, type getUniqueSelector failed\n\nRequest stack:\nrequest@resource://devtools/shared/protocol/Front.js:292:14\ngenerateRequestMethods/</frontProto[name]@resource://devtools/shared/protocol/Front/FrontClassWithSpec.js:46:19\n_create/<@resource://devtools/client/inspector/rules/views/rule-editor.js:176:72\n_create@resource://devtools/client/inspector/rules/views/rule-editor.js:189:20\nRuleEditor@resource://devtools/client/inspector/rules/views/rule-editor.js:80:8\n_createEditors@resource://devtools/client/inspector/rules/rules.js:1326:23\n_populate/<@resource://devtools/client/inspector/rules/rules.js:1106:37\npromise callback*_populate@resource://devtools/client/inspector/rules/rules.js:1100:8\nrefreshPanel/<@resource://devtools/client/inspector/rules/rules.js:1034:19\npromise callback*refreshPanel@resource://devtools/client/inspector/rules/rules.js:1033:34\nrefresh@resource://devtools/client/inspector/rules/rules.js:2073:17\n_emit@resource://devtools/shared/event-emitter.js:244:34\nemit@resource://devtools/shared/event-emitter.js:190:18\nemit@resource://devtools/shared/event-emitter.js:342:18\nonMutations@resource://devtools/client/inspector/shared/style-change-tracker.js:85:14\n_emit@resource://devtools/shared/event-emitter.js:244:34\nemit@resource://devtools/shared/event-emitter.js:190:18\nemit@resource://devtools/shared/event-emitter.js:342:18\ngetMutations@resource://devtools/client/fronts/walker.js:311:10\nasync*onMutations@resource://devtools/client/fronts/walker.js:320:10\nonPacket@resource://devtools/shared/protocol/Front.js:325:36\nonPacket@resource://devtools/client/devtools-client.js:482:13\nsend/<@resource://devtools/shared/transport/local-transport.js:68:25\nexports.makeInfallible/<@resource://devtools/shared/ThreadSafeDevToolsUtils.js:103:22\nDevToolsUtils.executeSoon*exports.executeSoon@resource://devtools/shared/DevToolsUtils.js:54:21\nsend@resource://devtools/shared/transport/local-transport.js:56:21\nsend@resource://devtools/server/devtools-server-connection.js:99:20\n_onPacketReceived@resource://devtools/shared/transport/js-window-actor-transport.js:48:18\nemit@resource://gre/modules/EventEmitter.jsm:160:20\nreceiveMessage@resource://devtools/server/connectors/js-window-actor/DevToolsFrameParent.jsm:213:21\nJSActor query*sendPacket@resource://devtools/server/connectors/js-window-actor/DevToolsFrameChild.jsm:402:10\nsend@resource://devtools/shared/transport/js-window-actor-transport.js:53:25\nsend@resource://devtools/server/devtools-server-connection.js:99:20\n_sendEvent@resource://devtools/shared/protocol/Actor.js:72:15\ninitialize/<@resource://devtools/shared/protocol/Actor.js:46:16\n_emit@resource://devtools/shared/event-emitter.js:244:34\nemit@resource://devtools/shared/event-emitter.js:190:18\nemit@resource://devtools/shared/event-emitter.js:342:18\n_emitNewMutations@resource://devtools/server/actors/inspector/walker.js:2323:10\nlater@resource://devtools/shared/throttle.js:33:19\nnotify@resource://gre/modules/Timer.jsm:62:17\n", "resource://devtools/shared/protocol/Front.js", 106))
[task 2022-01-16T13:30:13.705Z] 13:30:13     INFO - Removing tab.
[task 2022-01-16T13:30:13.710Z] 13:30:13     INFO - Waiting for event: 'TabClose' on [object XULElement].
[task 2022-01-16T13:30:13.712Z] 13:30:13     INFO - Got event: 'TabClose' on [object XULElement].
[task 2022-01-16T13:30:13.713Z] 13:30:13     INFO - Tab removed and finished closing
[task 2022-01-16T13:30:13.719Z] 13:30:13     INFO - GECKO(4271) | JavaScript error: , line 0: NotFoundError: No such JSWindowActor 'DevToolsFrame'
[task 2022-01-16T13:30:13.720Z] 13:30:13     INFO - GECKO(4271) | JavaScript error: , line 0: NotFoundError: No such JSWindowActor 'DevToolsFrame'
[task 2022-01-16T13:30:13.721Z] 13:30:13     INFO - GECKO(4271) | JavaScript error: , line 0: NotFoundError: No such JSWindowActor 'DevToolsFrame'
[task 2022-01-16T13:30:13.734Z] 13:30:13     INFO - GECKO(4271) | JavaScript error: , line 0: NotFoundError: No such JSWindowActor 'DevToolsFrame'
[task 2022-01-16T13:30:13.742Z] 13:30:13     INFO - Console message: [JavaScript Error: "NotFoundError: No such JSWindowActor 'DevToolsFrame'"]
[task 2022-01-16T13:30:13.744Z] 13:30:13     INFO - Console message: [JavaScript Error: "NotFoundError: No such JSWindowActor 'DevToolsFrame'"]
[task 2022-01-16T13:30:13.744Z] 13:30:13     INFO - Console message: [JavaScript Error: "NotFoundError: No such JSWindowActor 'DevToolsFrame'"]
[task 2022-01-16T13:30:13.748Z] 13:30:13     INFO - Console message: [JavaScript Error: "NotFoundError: No such JSWindowActor 'DevToolsFrame'"]
[task 2022-01-16T13:30:13.749Z] 13:30:13     INFO - TEST-PASS | devtools/client/inspector/rules/test/browser_rules_custom.js | The main process DevToolsServer has no pending connection when the test ends - 

Comment 1

[Intermittent Failures Robot]

1 failures in 3060 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-central: 1

Platform and build breakdown:

• linux1804-64-shippable-qr: 1
  • opt: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1750446&startday=2022-01-10&endday=2022-01-16&tree=all

Comment 2

[Intermittent Failures Robot]

9 failures in 3444 pushes (0.003 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 5
• mozilla-central: 2
• try: 2

Platform and build breakdown:

• linux1804-64-qr: 5
  • opt: 5
• linux1804-64-shippable-qr: 3
  • opt: 3
• linux1804-64-asan-qr: 1
  • opt: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1750446&startday=2022-01-17&endday=2022-01-23&tree=all

Comment 3

[Intermittent Failures Robot]

11 failures in 3445 pushes (0.003 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 7
• mozilla-central: 4

Platform and build breakdown:

• linux1804-64-qr: 3
  • opt: 3
• linux1804-64-shippable-qr: 7
  • opt: 7
• windows10-64-2004-qr: 1
  • debug: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1750446&startday=2022-01-24&endday=2022-01-30&tree=all

Comment 4

[Intermittent Failures Robot]

18 failures in 3165 pushes (0.006 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 13
• mozilla-central: 4
• try: 1

Platform and build breakdown:

• linux1804-64-shippable-qr: 9
  • opt: 9
• linux1804-64-qr: 8
  • opt: 8
• linux1804-64-devedition-qr: 1
  • opt: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1750446&startday=2022-01-31&endday=2022-02-06&tree=all

Comment 5

[Intermittent Failures Robot]

24 failures in 3711 pushes (0.006 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• try: 2
• autoland: 17
• mozilla-central: 5

Platform and build breakdown:

• linux1804-64-qr: 14
  • opt: 14
• linux1804-64-shippable-qr: 9
  • opt: 9
• linux1804-64-asan-qr: 1
  • opt: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1750446&startday=2022-02-07&endday=2022-02-13&tree=all

Comment 6

[Intermittent Failures Robot]

12 failures in 3281 pushes (0.004 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-central: 2
• autoland: 7
• mozilla-beta: 2
• try: 1

Platform and build breakdown:

• linux1804-64-asan-qr: 1
  • opt: 1
• linux1804-64-shippable-qr: 4
  • opt: 4
• linux1804-64-qr: 3
  • opt: 3
• linux1804-64-devedition-qr: 3
  • opt: 3
• windows10-64-2004-asan-qr: 1
  • opt: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1750446&startday=2022-02-14&endday=2022-02-20&tree=all

Comment 7

[Intermittent Failures Robot]

16 failures in 2992 pushes (0.005 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 10
• try: 1
• mozilla-central: 4
• mozilla-beta: 1

Platform and build breakdown:

• linux1804-64-qr: 8
  • opt: 8
• linux1804-64-devedition-qr: 2
  • opt: 2
• linux1804-64-shippable-qr: 6
  • opt: 6

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1750446&startday=2022-02-21&endday=2022-02-27&tree=all

Comment 8

[Intermittent Failures Robot]

21 failures in 3063 pushes (0.007 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 17
• mozilla-central: 4

Platform and build breakdown:

• linux1804-64-qr: 7
  • opt: 7
• linux1804-64-asan-qr: 1
  • opt: 1
• linux1804-64-shippable-qr: 13
  • opt: 13

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1750446&startday=2022-02-28&endday=2022-03-06&tree=all

Comment 9

[Intermittent Failures Robot]

29 failures in 2837 pushes (0.01 failures/push) were associated with this bug in the last 7 days.

This is the #40 most frequent failure this week.

Repository breakdown:

• autoland: 20
• mozilla-central: 9

Platform and build breakdown:

• linux1804-64-shippable-qr: 16
  • opt: 16
• linux1804-64-qr: 12
  • opt: 12
• linux1804-64-asan-qr: 1
  • opt: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1750446&startday=2022-03-07&endday=2022-03-13&tree=all

Comment 10

[Intermittent Failures Robot]

19 failures in 3304 pushes (0.006 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 15
• mozilla-central: 1
• try: 2
• mozilla-beta: 1

Platform and build breakdown:

• linux1804-64-shippable-qr: 4
  • opt: 4
• linux1804-64-qr: 12
  • opt: 12
• linux1804-64-asan-qr: 1
  • opt: 1
• windows10-64-2004-asan-qr: 1
  • opt: 1
• linux1804-64-devedition-qr: 1
  • opt: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1750446&startday=2022-03-14&endday=2022-03-20&tree=all

Comment 11

[Intermittent Failures Robot]

17 failures in 3341 pushes (0.005 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 9
• try: 5
• mozilla-central: 3

Platform and build breakdown:

• linux1804-64-qr: 11
  • opt: 11
• linux1804-64-shippable-qr: 5
  • opt: 5
• linux1804-64-devedition-qr: 1
  • opt: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1750446&startday=2022-03-21&endday=2022-03-27&tree=all

Comment 12

[Intermittent Failures Robot]

19 failures in 3323 pushes (0.006 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 12
• mozilla-central: 6
• try: 1

Platform and build breakdown:

• linux1804-64-shippable-qr: 9
  • opt: 9
• linux1804-64-qr: 6
  • opt: 6
• windows10-64-2004-asan-qr: 2
  • opt: 2
• windows10-64-2004-qr: 1
  • debug: 1
• linux1804-64-devedition-qr: 1
  • opt: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1750446&startday=2022-03-28&endday=2022-04-03&tree=all

Comment 13

[Intermittent Failures Robot]

24 failures in 2922 pushes (0.008 failures/push) were associated with this bug in the last 7 days.

This is the #46 most frequent failure this week.

Repository breakdown:

• autoland: 19
• mozilla-central: 4
• try: 1

Platform and build breakdown:

• linux1804-64-shippable-qr: 8
  • opt: 8
• linux1804-64-asan-qr: 4
  • opt: 4
• linux1804-64-qr: 10
  • opt: 10
• linux1804-64-devedition-qr: 1
  • opt: 1
• windows10-64-2004-asan-qr: 1
  • opt: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1750446&startday=2022-04-04&endday=2022-04-10&tree=all

Comment 14

[Iulian Moraru]

Update:
There have been 30 failures within the last 7 days:
• 2 failures on Linux 18.04 x64 WebRender asan opt
• 12 failures on Linux 18.04 x64 WebRender opt
• 15 failures on Linux 18.04 x64 WebRender Shippable opt
• 1 failures on Windows 10 x64 2004 asan WebRender opt
Recent failure log: https://treeherder.mozilla.org/logviewer?job_id=374718561&repo=mozilla-central&lineNumber=24880

[task 2022-04-16T11:51:33.534Z] 11:51:33     INFO - TEST-PASS | devtools/client/inspector/rules/test/browser_rules_custom.js | Class property should be overridden - 
[task 2022-04-16T11:51:33.535Z] 11:51:33     INFO - Selecting the node for '#testidImportant'
[task 2022-04-16T11:51:33.536Z] 11:51:33     INFO - Console message: [JavaScript Warning: "Empty string passed to getElementById()." {file: "chrome://global/content/elements/browser-custom-element.js" line: 391}]
[task 2022-04-16T11:51:33.537Z] 11:51:33     INFO - Buffered messages finished
[task 2022-04-16T11:51:33.540Z] 11:51:33     INFO - TEST-UNEXPECTED-FAIL | devtools/client/inspector/rules/test/browser_rules_custom.js | Uncaught exception in test - at chrome://mochitests/content/browser/devtools/client/inspector/test/head.js:1043 - TypeError: can't access property "_ruleEditor", view.element.children[childrenIndex] is undefined
[task 2022-04-16T11:51:33.541Z] 11:51:33     INFO - Stack trace:
[task 2022-04-16T11:51:33.542Z] 11:51:33     INFO - getRuleViewRuleEditor@chrome://mochitests/content/browser/devtools/client/inspector/test/head.js:1043:1
[task 2022-04-16T11:51:33.542Z] 11:51:33     INFO - importantCustomOverride@chrome://mochitests/content/browser/devtools/client/inspector/rules/test/browser_rules_custom.js:66:39
[task 2022-04-16T11:51:33.543Z] 11:51:33     INFO - async*@chrome://mochitests/content/browser/devtools/client/inspector/rules/test/browser_rules_custom.js:15:9
[task 2022-04-16T11:51:33.544Z] 11:51:33     INFO - Async*handleTask@chrome://mochikit/content/browser-test.js:989:26
[task 2022-04-16T11:51:33.545Z] 11:51:33     INFO - _runTaskBasedTest@chrome://mochikit/content/browser-test.js:1061:18
[task 2022-04-16T11:51:33.546Z] 11:51:33     INFO - Tester_execTest@chrome://mochikit/content/browser-test.js:1189:14
[task 2022-04-16T11:51:33.546Z] 11:51:33     INFO - nextTest/<@chrome://mochikit/content/browser-test.js:978:14
[task 2022-04-16T11:51:33.547Z] 11:51:33     INFO - SimpleTest.waitForFocus/<@chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:1041:13
[task 2022-04-16T11:51:33.548Z] 11:51:33     INFO - Leaving test bound 
[task 2022-04-16T11:51:33.994Z] 11:51:33     INFO - GECKO(10102) | console.error: "Exception while getting unique selector" (new Error("Connection closed, pending request to server0.conn72.windowGlobal38654705665/domnode33, type getUniqueSelector failed\n\nRequest stack:\nrequest@resource://devtools/shared/protocol/Front.js:292:14\ngenerateRequestMethods/</frontProto[name]@resource://devtools/shared/protocol/Front/FrontClassWithSpec.js:46:19\n_create/<@resource://devtools/client/inspector/rules/views/rule-editor.js:208:72\n_create@resource://devtools/client/inspector/rules/views/rule-editor.js:221:20\nRuleEditor@resource://devtools/client/inspector/rules/views/rule-editor.js:80:8\n_createEditors@resource://devtools/client/inspector/rules/rules.js:1335:23\n_populate/<@resource://devtools/client/inspector/rules/rules.js:1115:37\npromise callback*_populate@resource://devtools/client/inspector/rules/rules.js:1109:8\nrefreshPanel/<@resource://devtools/client/inspector/rules/rules.js:1043:19\npromise callback*refreshPanel@resource://devtools/client/inspector/rules/rules.js:1042:34\nrefresh@resource://devtools/client/inspector/rules/rules.js:2114:17\n_emit@resource://devtools/shared/event-emitter.js:242:32\nemit@resource://devtools/shared/event-emitter.js:186:18\nemit@resource://devtools/shared/event-emitter.js:330:18\nonMutations@resource://devtools/client/inspector/shared/style-change-tracker.js:85:14\n_emit@resource://devtools/shared/event-emitter.js:242:32\nemit@resource://devtools/shared/event-emitter.js:186:18\nemit@resource://devtools/shared/event-emitter.js:330:18\ngetMutations@resource://devtools/client/fronts/walker.js:312:10\nasync*onMutations@resource://devtools/client/fronts/walker.js:321:10\nonPacket@resource://devtools/shared/protocol/Front.js:325:36\nonPacket@resource://devtools/client/devtools-client.js:482:13\nsend/<@resource://devtools/shared/transport/local-transport.js:68:25\nexports.makeInfallible/<@resource://devtools/shared/ThreadSafeDevToolsUtils.js:103:22\nDevToolsUtils.executeSoon*exports.executeSoon@resource://devtools/shared/DevToolsUtils.js:54:21\nsend@resource://devtools/shared/transport/local-transport.js:56:21\nsend@resource://devtools/server/devtools-server-connection.js:99:20\n_onPacketReceived@resource://devtools/shared/transport/js-window-actor-transport.js:48:18\nemit@resource://gre/modules/EventEmitter.jsm:160:20\nreceiveMessage@resource://devtools/server/connectors/js-window-actor/DevToolsFrameParent.jsm:213:21\nJSActor query*sendPacket@resource://devtools/server/connectors/js-window-actor/DevToolsFrameChild.jsm:402:10\nsend@resource://devtools/shared/transport/js-window-actor-transport.js:53:25\nsend@resource://devtools/server/devtools-server-connection.js:99:20\n_sendEvent@resource://devtools/shared/protocol/Actor.js:72:15\ninitialize/<@resource://devtools/shared/protocol/Actor.js:46:16\n_emit@resource://devtools/shared/event-emitter.js:242:32\nemit@resource://devtools/shared/event-emitter.js:186:18\nemit@resource://devtools/shared/event-emitter.js:330:18\n_emitNewMutations@resource://devtools/server/actors/inspector/walker.js:2329:10\nlater@resource://devtools/shared/throttle.js:33:19\nnotify@resource://gre/modules/Timer.jsm:62:17\n", "resource://devtools/shared/protocol/Front.js", 106))
[task 2022-04-16T11:51:33.997Z] 11:51:33     INFO - Removing tab.
[task 2022-04-16T11:51:33.999Z] 11:51:33     INFO - Waiting for event: 'TabClose' on [object XULElement].
[task 2022-04-16T11:51:34.001Z] 11:51:34     INFO - Got event: 'TabClose' on [object XULElement].
[task 2022-04-16T11:51:34.004Z] 11:51:34     INFO - Tab removed and finished closing
[task 2022-04-16T11:51:34.024Z] 11:51:34     INFO - GECKO(10102) | JavaScript error: , line 0: NotFoundError: No such JSWindowActor 'DevToolsFrame'
[task 2022-04-16T11:51:34.029Z] 11:51:34     INFO - GECKO(10102) | JavaScript error: , line 0: NotFoundError: No such JSWindowActor 'DevToolsFrame'
[task 2022-04-16T11:51:34.029Z] 11:51:34     INFO - GECKO(10102) | JavaScript error: , line 0: NotFoundError: No such JSWindowActor 'DevToolsFrame'
[task 2022-04-16T11:51:34.032Z] 11:51:34     INFO - GECKO(10102) | JavaScript error: , line 0: NotFoundError: No such JSWindowActor 'DevToolsFrame'
[task 2022-04-16T11:51:34.040Z] 11:51:34     INFO - Console message: [JavaScript Error: "NotFoundError: No such JSWindowActor 'DevToolsFrame'"]
[task 2022-04-16T11:51:34.041Z] 11:51:34     INFO - Console message: [JavaScript Error: "NotFoundError: No such JSWindowActor 'DevToolsFrame'"]
[task 2022-04-16T11:51:34.043Z] 11:51:34     INFO - Console message: [JavaScript Error: "NotFoundError: No such JSWindowActor 'DevToolsFrame'"]
[task 2022-04-16T11:51:34.045Z] 11:51:34     INFO - Console message: [JavaScript Error: "NotFoundError: No such JSWindowActor 'DevToolsFrame'"]
[task 2022-04-16T11:51:34.047Z] 11:51:34     INFO - TEST-PASS | devtools/client/inspector/rules/test/browser_rules_custom.js | The main process DevToolsServer has no pending connection when the test ends - 
[task 2022-04-16T11:51:34.089Z] 11:51:34     INFO - GECKO(10102) | MEMORY STAT | vsize 12281MB | residentFast 969MB | heapAllocated 568MB
[task 2022-04-16T11:51:34.090Z] 11:51:34     INFO - TEST-OK | devtools/client/inspector/rules/test/browser_rules_custom.js | took 2609ms
[task 2022-04-16T11:51:34.135Z] 11:51:34     INFO - checking window state
[task 2022-04-16T11:51:34.155Z] 11:51:34     INFO - TEST-START | devtools/client/inspector/rules/test/browser_rules_cycle-angle.js

Comment 15

[Iulian Moraru]

Hi Julian! Can you please take another look at this?
Thank you!

Comment 16

[Intermittent Failures Robot]

28 failures in 2948 pushes (0.009 failures/push) were associated with this bug in the last 7 days.

This is the #31 most frequent failure this week.

Repository breakdown:

• autoland: 21
• mozilla-central: 7

Platform and build breakdown:

• linux1804-64-qr: 10
  • opt: 10
• linux1804-64-shippable-qr: 15
  • opt: 15
• linux1804-64-asan-qr: 2
  • opt: 2
• windows10-64-2004-asan-qr: 1
  • opt: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1750446&startday=2022-04-11&endday=2022-04-17&tree=all

Comment 17

[Julian Descottes [:jdescottes]]

Attachment: Bug 1750446 - [devtools] Wait for the proper mutation in browser_rules_custom.js

We usually need three mutations to reach the final state of addProperty and usually the 2nd and 3rd come in the same batch.
Meaning that simply waiting for receivedMutations >= 2 works in most cases.

But the intermittent screenshots show that the markup view was not updated yet with the correct content meaning it either didn't receive or processed the last
mutation.
Let's try to wait for the proper mutation instead of using an arbitrary number. Hopefully this fixes it.

Comment 18

[Julian Descottes [:jdescottes]]

Baseline at https://treeherder.mozilla.org/jobs?repo=try&revision=8457cc4e57e84b6884d37c01f611ca1231124410: 3 failures for this test on 50 runs.
Try with fix at https://treeherder.mozilla.org/jobs?repo=try&revision=178913c9b1b0e0b1e43e7acdaf142d5f8d9790ea (no failure for this test so far, but only 20 runs, more retriggers on the way)

Comment 19

[Julian Descottes [:jdescottes]]

(In reply to Julian Descottes [:jdescottes] from comment #18)

Baseline at https://treeherder.mozilla.org/jobs?repo=try&revision=8457cc4e57e84b6884d37c01f611ca1231124410: 3 failures for this test on 50 runs.
Try with fix at https://treeherder.mozilla.org/jobs?repo=try&revision=178913c9b1b0e0b1e43e7acdaf142d5f8d9790ea (no failure for this test so far, but only 20 runs, more retriggers on the way)

No failure on 50 runs, hopefully that means the fix is working here.

Comment 20

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/475ed3e5e03c
[devtools] Wait for the proper mutation in browser_rules_custom.js r=nchevobbe

Comment 21

[Marian-Vasile Laza]

https://hg.mozilla.org/mozilla-central/rev/475ed3e5e03c

Comment 22

[Intermittent Failures Robot]

19 failures in 3159 pushes (0.006 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 15
• mozilla-central: 3
• try: 1

Platform and build breakdown:

• linux1804-64-qr: 11
  • opt: 11
• linux1804-64-shippable-qr: 7
  • opt: 7
• linux1804-64-asan-qr: 1
  • opt: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1750446&startday=2022-04-18&endday=2022-04-24&tree=all