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[scoped-registry] Null registry element should get registry on adopt instead of insert#57213

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chromium-export-cl-7078864
Jan 27, 2026
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[scoped-registry] Null registry element should get registry on adopt instead of insert#57213
chromium-wpt-export-bot merged 1 commit into
masterfrom
chromium-export-cl-7078864

[scoped-registry] Null registry element should get registry on adopt

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Community-TC Integration / wpt-firefox-nightly-results succeeded Jan 27, 2026 in 12m 19s

Community-TC (pull_request)

Collect results for all tests affected by a pull request in firefox.

Details

View task in Taskcluster | View logs in Taskcluster | View task group in Taskcluster

Task Status

Started: 2026-01-27T04:00:24.235Z
Resolved: 2026-01-27T04:05:01.457Z
Task Execution Time: 4 minutes, 37 seconds, 222 milliseconds
Task Status: completed
Reason Resolved: completed
RunId: 0

Artifacts

- public/logs/live_backing.log
- public/logs/live.log
- public/results/checkrun.md
- public/results/wpt_report.json.gz
- public/results/wpt_screenshot.txt.gz

WPT Command: python3 ./wpt run --channel=nightly --no-fail-on-unexpected --log-wptreport=../artifacts/wpt_report.json --log-wptscreenshot=../artifacts/wpt_screenshot.txt --affected base_head --log-mach-level=info --log-mach=- -y --no-pause --no-restart-on-unexpected --install-fonts --verify-log-full --no-headless --binary=/home/test/build/firefox/firefox firefox

[taskcluster 2026-01-27 04:00:24.296Z] Task ID: E60lg2FBTwWnF-D508Zr1A
[taskcluster 2026-01-27 04:00:24.296Z] Worker ID: 4386224702605335494
[taskcluster 2026-01-27 04:00:24.296Z] Worker Group: us-central1-b
[taskcluster 2026-01-27 04:00:24.296Z] Worker Node Type: projects/757942385826/machineTypes/n2-standard-4
[taskcluster 2026-01-27 04:00:24.296Z] Worker Pool: proj-wpt/ci
[taskcluster 2026-01-27 04:00:24.296Z] Worker Version: 46.1.0
[taskcluster 2026-01-27 04:00:24.296Z] Public IP: 34.44.182.2
[taskcluster 2026-01-27 04:00:24.296Z] Hostname: proj-wpt-ci-f969e2o5qloovwgkbant7q

[taskcluster 2026-01-27 04:00:25.394Z] === Task Starting ===
+ '[' '' ']'
+ '[' -d /etc/profile.d ']'
+ for i in /etc/profile.d/*.sh
+ '[' -r /etc/profile.d/01-locale-fix.sh ']'
+ . /etc/profile.d/01-locale-fix.sh
+++ /usr/bin/locale-check C.UTF-8
++ eval
+ for i in /etc/profile.d/*.sh
+ '[' -r /etc/profile.d/apps-bin-path.sh ']'
+ . /etc/profile.d/apps-bin-path.sh

...(384 lines hidden)...

 0:28.43 mozversion INFO platform_version: 149.0a1
 0:34.44 INFO Installed font: Ahem.ttf
 0:35.41 wptserve INFO Starting http server on http://127.0.0.1:8002
 0:35.52 wptserve INFO Starting http server on http://127.0.0.1:8001
 0:35.52 wptserve INFO Starting http server on http://127.0.0.1:8000
 0:35.59 wptserve INFO Starting https server on https://127.0.0.1:8445
 0:35.59 wptserve INFO Starting http server on http://127.0.0.1:8003
 0:35.59 wptserve INFO Create socket on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 0:35.59 wptserve INFO Bind on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 0:35.59 wptserve INFO Listen on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 0:35.60 wptserve INFO Starting https server on https://127.0.0.1:8443
 0:35.61 wptserve INFO Starting http2 server on https://127.0.0.1:9000
 0:35.61 wptserve INFO Starting https server on https://127.0.0.1:8444
 0:35.61 wptserve INFO Create socket on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 0:35.62 wptserve INFO Starting https server on https://127.0.0.1:8446
 0:35.62 wptserve INFO Bind on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 0:35.62 wptserve INFO Listen on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 0:35.71 wptserve INFO Starting WebTransport over HTTP/3 server on 127.0.0.1:11000
 0:35.98 SUITE_START: web-platform-test - running 1 tests
 0:53.76 INFO Using 1 child processes
 0:53.78 INFO Setting up ssl
 0:53.80 certutil Full command: /usr/bin/certutil -N -d /tmp/tmpm72_k9iy.mozrunner -f /tmp/tmpm72_k9iy.mozrunner/.crtdbpw
certutil b''
 0:53.83 certutil b''
 0:53.84 certutil b'\nCertificate Nickname                                         Trust Attributes\n                                                             SSL,S/MIME,JAR/XPI\n\nweb-platform-tests                                           CT,, \n'
 0:53.84 INFO Application command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank -profile /tmp/tmpkug6twmp
 0:53.85 INFO Starting runner
 0:53.85 pid:1424 Full command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank
pid:1424 [1424] Sandbox: CanCreateUserNamespace() clone() failure: EPERM
 0:54.87 pid:1424 1769486689579	Marionette	INFO	Marionette enabled
 0:55.09 pid:1424 1769486689802	Marionette	INFO	Listening on port 50143
Failed to read: session.screen0.titlebar.left
Setting default value
Failed to read: session.screen0.titlebar.right
Setting default value
 0:57.95 pid:1424 [GFX1-]: Calling WaitFlushedEvent::Run: is delayed: 2290
 0:58.56 pid:1424 console.error: services.settings:
 0:58.56 pid:1424   Message: EmptyDatabaseError: "main/nimbus-desktop-experiments" has not been synced yet
 0:58.56 pid:1424   Stack:
 0:58.56 pid:1424     EmptyDatabaseError@resource://services-settings/Database.sys.mjs:19:5
 0:58.56 pid:1424 list@resource://services-settings/Database.sys.mjs:96:13
 0:58.76 pid:1424 console.warn: BackupService: "There was an error while trying to get the Document's directory" [Exception... "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIProperties.get]"  nsresult: "0x80004005 (NS_ERROR_FAILURE)"  location: "JS frame :: resource:///modules/backup/BackupService.sys.mjs :: get docsDirFolderPath :: line 1245"  data: no]
 0:59.04 TEST_START: /custom-elements/registries/element-mutation.html
 0:59.71 TEST_END: Test OK. Subtests passed 0/10. Unexpected 10
FAIL An element with global registry should not change its registry when run append into a shadow tree with scoped registry. - Illegal constructor.
runTests/<@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:36:26
Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2869:25
test@http://web-platform.test:8000/resources/testharness.js:633:30
runTests@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:35:9
@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:80:9
FAIL An element with scoped registry should not change its registry when run append out of the shadow tree. - Illegal constructor.
runTests/<@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:55:27
Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2869:25
test@http://web-platform.test:8000/resources/testharness.js:633:30
runTests@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:50:9
@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:80:9
FAIL An element with scoped registry should not change its registry when run append into another shadow tree with different scoped registry. - Illegal constructor.
runTests/<@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:69:27
Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2869:25
test@http://web-platform.test:8000/resources/testharness.js:633:30
runTests@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:63:9
@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:80:9
FAIL An element with global registry should not change its registry when run appendChild into a shadow tree with scoped registry. - Illegal constructor.
runTests/<@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:36:26
Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2869:25
test@http://web-platform.test:8000/resources/testharness.js:633:30
runTests@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:35:9
@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:81:9
FAIL An element with scoped registry should not change its registry when run appendChild out of the shadow tree. - Illegal constructor.
runTests/<@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:55:27
Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2869:25
test@http://web-platform.test:8000/resources/testharness.js:633:30
runTests@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:50:9
@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:81:9
FAIL An element with scoped registry should not change its registry when run appendChild into another shadow tree with different scoped registry. - Illegal constructor.
runTests/<@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:69:27
Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2869:25
test@http://web-platform.test:8000/resources/testharness.js:633:30
runTests@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:63:9
@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:81:9
FAIL An element with global registry should not change its registry when run prepend into a shadow tree with scoped registry. - Illegal constructor.
runTests/<@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:36:26
Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2869:25
test@http://web-platform.test:8000/resources/testharness.js:633:30
runTests@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:35:9
@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:82:9
FAIL An element with scoped registry should not change its registry when run prepend out of the shadow tree. - Illegal constructor.
runTests/<@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:55:27
Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2869:25
test@http://web-platform.test:8000/resources/testharness.js:633:30
runTests@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:50:9
@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:82:9
FAIL An element with scoped registry should not change its registry when run prepend into another shadow tree with different scoped registry. - Illegal constructor.
runTests/<@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:69:27
Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2869:25
test@http://web-platform.test:8000/resources/testharness.js:633:30
runTests@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:63:9
@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:82:9
FAIL Declarative shadow DOM with shadowrootcustomelementregistry attribute without registry initialized should remain null registry after adoption. - assert_equals: expected (object) object "[object CustomElementRegistry]" but got (undefined) undefined
@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:88:18
Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2869:25
test@http://web-platform.test:8000/resources/testharness.js:633:30
@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:84:5

 0:59.71 INFO No more tests
 0:59.72 pid:1424 1769486694427	Marionette	INFO	Stopped listening on port 50143
 1:00.53 INFO Browser exited with return code -15
 1:00.37 INFO Closing logging queue
 1:00.37 INFO queue closed
 1:00.54 SUITE_END

web-platform-test
~~~~~~~~~~~~~~~~~
Ran 11 checks (10 subtests, 1 tests)
Expected results: 1
Unexpected results: 10
  subtest: 10 (10 fail)

Unexpected Results
------------------
/custom-elements/registries/element-mutation.html
  FAIL An element with global registry should not change its registry when run append into a shadow tree with scoped registry. - Illegal constructor.
runTests/<@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:36:26
Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2869:25
test@http://web-platform.test:8000/resources/testharness.js:633:30
runTests@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:35:9
@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:80:9
  FAIL An element with scoped registry should not change its registry when run append out of the shadow tree. - Illegal constructor.
runTests/<@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:55:27
Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2869:25
test@http://web-platform.test:8000/resources/testharness.js:633:30
runTests@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:50:9
@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:80:9
  FAIL An element with scoped registry should not change its registry when run append into another shadow tree with different scoped registry. - Illegal constructor.
runTests/<@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:69:27
Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2869:25
test@http://web-platform.test:8000/resources/testharness.js:633:30
runTests@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:63:9
@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:80:9
  FAIL An element with global registry should not change its registry when run appendChild into a shadow tree with scoped registry. - Illegal constructor.
runTests/<@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:36:26
Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2869:25
test@http://web-platform.test:8000/resources/testharness.js:633:30
runTests@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:35:9
@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:81:9
  FAIL An element with scoped registry should not change its registry when run appendChild out of the shadow tree. - Illegal constructor.
runTests/<@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:55:27
Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2869:25
test@http://web-platform.test:8000/resources/testharness.js:633:30
runTests@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:50:9
@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:81:9
  FAIL An element with scoped registry should not change its registry when run appendChild into another shadow tree with different scoped registry. - Illegal constructor.
runTests/<@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:69:27
Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2869:25
test@http://web-platform.test:8000/resources/testharness.js:633:30
runTests@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:63:9
@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:81:9
  FAIL An element with global registry should not change its registry when run prepend into a shadow tree with scoped registry. - Illegal constructor.
runTests/<@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:36:26
Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2869:25
test@http://web-platform.test:8000/resources/testharness.js:633:30
runTests@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:35:9
@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:82:9
  FAIL An element with scoped registry should not change its registry when run prepend out of the shadow tree. - Illegal constructor.
runTests/<@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:55:27
Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2869:25
test@http://web-platform.test:8000/resources/testharness.js:633:30
runTests@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:50:9
@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:82:9
  FAIL An element with scoped registry should not change its registry when run prepend into another shadow tree with different scoped registry. - Illegal constructor.
runTests/<@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:69:27
Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2869:25
test@http://web-platform.test:8000/resources/testharness.js:633:30
runTests@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:63:9
@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:82:9
  FAIL Declarative shadow DOM with shadowrootcustomelementregistry attribute without registry initialized should remain null registry after adoption. - assert_equals: expected (object) object "[object CustomElementRegistry]" but got (undefined) undefined
@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:88:18
Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2869:25
test@http://web-platform.test:8000/resources/testharness.js:633:30
@http://web-platform.test:8000/custom-elements/registries/element-mutation.html:84:5
 1:00.54 INFO Got 1 unexpected results, with 0 unexpected passes
 1:00.54 wptserve INFO Stopped http server on 127.0.0.1:8001
 1:00.54 wptserve INFO Stopped http server on 127.0.0.1:8002
 1:00.56 wptserve INFO Stopped http server on 127.0.0.1:8443
 1:00.57 wptserve INFO Stopped http server on 127.0.0.1:8003
 1:00.57 wptserve INFO Stopped http server on 127.0.0.1:8000
 1:00.58 wptserve INFO Stopped http server on 127.0.0.1:8444
 1:00.58 wptserve INFO Stopped http server on 127.0.0.1:8445
 1:00.58 wptserve INFO Stopped http server on 127.0.0.1:8446
 1:00.58 wptserve INFO Stopped http server on 127.0.0.1:9000
 1:00.58 wptserve INFO Stopped WebTransport over HTTP/3 server on 127.0.0.1:11000
 1:01.01 wptserve INFO Close on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 1:01.02 wptserve INFO Close on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 1:01.08 INFO Removed font: Ahem.ttf
 1:01.11 INFO Closing logging queue
 1:01.11 INFO queue closed
 1:01.11 INFO Tolerating 1 unexpected results
[taskcluster 2026-01-27 04:04:58.040Z] === Task Finished ===
[taskcluster 2026-01-27 04:05:00.026Z] Successful task run with exit code: 0 completed in 275.73 seconds
View more details on Community-TC Integration