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Test script child mutation does not trigger script execution

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Test script child mutation doees not trigger script execution #58601

Test script child mutation does not trigger script execution
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Community-TC Integration / wpt-firefox-nightly-results succeeded Mar 18, 2026 in 5m 44s

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: 2026-03-18T21:35:12.740Z
Resolved: 2026-03-18T21:38:54.235Z
Task Execution Time: 3 minutes, 41 seconds, 495 milliseconds
Task Status: completed
Reason Resolved: completed
TaskId: PoxhYD6MScWutVynIOzNUQ
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 2026-03-18 21:35:12.890Z] Task ID: PoxhYD6MScWutVynIOzNUQ
[taskcluster 2026-03-18 21:35:12.890Z] Worker ID: 4605681657219294346
[taskcluster 2026-03-18 21:35:12.890Z] Worker Group: us-east1-c
[taskcluster 2026-03-18 21:35:12.890Z] Worker Node Type: projects/757942385826/machineTypes/n2-standard-4
[taskcluster 2026-03-18 21:35:12.890Z] Worker Pool: proj-wpt/ci
[taskcluster 2026-03-18 21:35:12.890Z] Worker Version: 46.1.0
[taskcluster 2026-03-18 21:35:12.890Z] Public IP: 35.243.219.189
[taskcluster 2026-03-18 21:35:12.890Z] Hostname: proj-wpt-ci-fuv1nxfissqx-suaskmetg

ac811f28856d - Started downloading
40516d781e70 - Started downloading
8f84a9f2102e - Started downloading
44ebbf800033 - Started downloading
8f84a9f2102e - Downloaded in 0.208 seconds
44ebbf800033 - Downloaded in 0.044 seconds
a8884b21e40e - Started downloading
79c347416ee8 - Started downloading
79c347416ee8 - Downloaded in 0.076 seconds
0104250cc342 - Started downloading
0104250cc342 - Downloaded in 0.043 seconds

...(312 lines hidden)...

Failed to read: session.screen0.workspaces
Setting default value
Failed to read: session.screen0.edgeSnapThreshold
Setting default value
Failed to read: session.screen0.window.focus.alpha
Setting default value
Failed to read: session.screen0.window.unfocus.alpha
Setting default value
Failed to read: session.screen0.menu.alpha
Setting default value
Failed to read: session.screen0.menuDelay
Setting default value
Failed to read: session.screen0.tab.width
Setting default value
Failed to read: session.screen0.tooltipDelay
Setting default value
Failed to read: session.screen0.allowRemoteActions
Setting default value
Failed to read: session.screen0.clientMenu.usePixmap
Setting default value
Failed to read: session.screen0.tabs.usePixmap
Setting default value
Failed to read: session.screen0.tabs.maxOver
Setting default value
Failed to read: session.screen0.tabs.intitlebar
Setting default value
Failed to read: session.screen0.focusModel
Setting default value
Failed to read: session.screen0.tabFocusModel
Setting default value
Failed to read: session.screen0.focusNewWindows
Setting default value
Failed to read: session.screen0.focusSameHead
Setting default value
Failed to read: session.screen0.rowPlacementDirection
Setting default value
Failed to read: session.screen0.colPlacementDirection
Setting default value
Failed to read: session.screen0.windowPlacement
Setting default value
Failed to read: session.screen0.slit.acceptKdeDockapps
Setting default value
Failed to read: session.screen0.slit.autoHide
Setting default value
Failed to read: session.screen0.slit.maxOver
Setting default value
Failed to read: session.screen0.slit.placement
Setting default value
Failed to read: session.screen0.slit.alpha
Setting default value
Failed to read: session.screen0.slit.onhead
Setting default value
Failed to read: session.screen0.slit.layer
Setting default value
Failed to read: session.screen0.toolbar.autoHide
Setting default value
Failed to read: session.screen0.toolbar.maxOver
Setting default value
Failed to read: session.screen0.toolbar.visible
Setting default value
Failed to read: session.screen0.toolbar.alpha
Setting default value
Failed to read: session.screen0.toolbar.layer
Setting default value
Failed to read: session.screen0.toolbar.onhead
Setting default value
Failed to read: session.screen0.toolbar.placement
Setting default value
Failed to read: session.screen0.toolbar.height
Setting default value
Failed to read: session.screen0.iconbar.mode
Setting default value
Failed to read: session.screen0.iconbar.alignment
Setting default value
Failed to read: session.screen0.iconbar.iconWidth
Setting default value
Failed to read: session.screen0.iconbar.iconTextPadding
Setting default value
Failed to read: session.screen0.iconbar.usePixmap
Setting default value
Warning: could not load product 'firefox' for argument registration: No module named 'mozleak'
Warning: could not load product 'firefox_android' for argument registration: No module named 'mozrunner'
Warning: could not load product 'safari' for argument registration: No module named 'psutil'
 0:00.00 INFO Set tests_root to /home/test/web-platform-tests
 0:00.00 INFO Set metadata_root to /home/test/web-platform-tests
 0:00.00 INFO Set manifest_update to True
 0:00.00 INFO Set manifest_download to True
mem avail: 14490 of 15806 MiB (91.68%), swap free:    0 of    0 MiB ( 0.00%)
 0:51.18 INFO Identified 1 affected tests
 0:51.18 INFO Using certutil /usr/bin/certutil
 0:51.18 INFO Downloading geckodriver
 0:51.18 INFO Attempting to install webdriver from nightly
 0:51.73 INFO Extracted geckodriver to /home/test/web-platform-tests/_venv3/bin/geckodriver
 0:51.73 INFO Installed b'geckodriver 0.36.0 (d75d6fbafe8e 2026-03-16 15:49 +0000)'
 0:56.53 INFO Getting profile data from git ref c1e060fc9eaba2d2e5fcac1d4227e680b6163730
 0:56.75 INFO Test prefs downloaded to /home/test/web-platform-tests/_venv3/profiles/c1e060fc9eaba2d2e5fcac1d4227e680b6163730/150.0a1
[1328] Sandbox: CanCreateUserNamespace() clone() failure: EPERM
 0:56.80 mozversion INFO application_buildid: 20260318092901
 0:56.80 mozversion INFO application_changeset: 97f49e2db85fc1a6b15605ef85bf1331726536ca
 0:56.80 mozversion INFO application_display_name: Firefox Nightly
 0:56.80 mozversion INFO application_id: {ec8030f7-c20a-464f-9b0e-13a3a9e97384}
 0:56.80 mozversion INFO application_name: Firefox
 0:56.80 mozversion INFO application_remotingname: firefox-nightly
 0:56.80 mozversion INFO application_repository: https://hg.mozilla.org/mozilla-central
 0:56.80 mozversion INFO application_vendor: Mozilla
 0:56.80 mozversion INFO application_version: 150.0a1
 0:56.80 mozversion INFO platform_buildid: 20260318092901
 0:56.80 mozversion INFO platform_changeset: 97f49e2db85fc1a6b15605ef85bf1331726536ca
 0:56.80 mozversion INFO platform_repository: https://hg.mozilla.org/mozilla-central
 0:56.80 mozversion INFO platform_version: 150.0a1
 1:02.53 INFO Installed font: Ahem.ttf
 1:03.51 wptserve INFO Starting http server on http://127.0.0.1:8001
 1:03.52 wptserve INFO Starting http server on http://127.0.0.1:8003
 1:03.53 wptserve INFO Starting http server on http://127.0.0.1:8000
 1:03.53 wptserve INFO Starting https server on https://127.0.0.1:8446
 1:03.55 wptserve INFO Starting https server on https://127.0.0.1:8444
 1:03.55 wptserve INFO Starting http server on http://127.0.0.1:8002
 1:03.56 wptserve INFO Starting https server on https://127.0.0.1:8445
 1:03.58 wptserve INFO Create socket on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 1:03.58 wptserve INFO Bind on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 1:03.58 wptserve INFO Listen on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 1:03.58 wptserve INFO Starting https server on https://127.0.0.1:8443
 1:03.59 wptserve INFO Create socket on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 1:03.59 wptserve INFO Bind on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 1:03.59 wptserve INFO Listen on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 1:03.61 wptserve INFO Starting http2 server on https://127.0.0.1:9000
 1:03.66 wptserve INFO Starting WebTransport over HTTP/3 server on 127.0.0.1:11000
 1:03.99 SUITE_START: web-platform-test - running 1 tests
 1:18.37 INFO Using 1 child processes
 1:18.39 INFO Setting up ssl
 1:18.41 certutil Full command: /usr/bin/certutil -N -d /tmp/tmphdh0zyzg.mozrunner -f /tmp/tmphdh0zyzg.mozrunner/.crtdbpw
certutil b''
 1:18.43 certutil b''
 1:18.43 certutil b'\nCertificate Nickname                                         Trust Attributes\n                                                             SSL,S/MIME,JAR/XPI\n\nweb-platform-tests                                           CT,, \n'
 1:18.44 INFO Application command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank -profile /tmp/tmpankawbpw
 1:18.44 INFO Starting runner
 1:18.44 pid:1431 Full command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank
pid:1431 [1431] Sandbox: CanCreateUserNamespace() clone() failure: EPERM
 1:18.99 pid:1431 1773869926305	Marionette	INFO	Marionette enabled
 1:19.08 pid:1431 1773869926403	Marionette	INFO	Listening on port 57885
Failed to read: session.screen0.titlebar.left
Setting default value
Failed to read: session.screen0.titlebar.right
Setting default value
 1:21.63 pid:1431 console.error: services.settings:
 1:21.63 pid:1431   Message: EmptyDatabaseError: "main/nimbus-desktop-experiments" has not been synced yet
 1:21.63 pid:1431   Stack:
 1:21.63 pid:1431     EmptyDatabaseError@resource://services-settings/Database.sys.mjs:19:5
 1:21.63 pid:1431 list@resource://services-settings/Database.sys.mjs:96:13
 1:21.84 pid:1431 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 1204"  data: no]
 1:22.30 TEST_START: /html/semantics/scripting-1/the-script-element/script-runs-on-character-data-mutation.window.html
 1:22.89 TEST_END: Test OK. Subtests passed 0/1. Unexpected 1
FAIL Script execution is never triggered on child mutation - assert_false: Setting CharacterData.data does not trigger execution expected false got true
@http://web-platform.test:8000/html/semantics/scripting-1/the-script-element/script-runs-on-character-data-mutation.window.js:22:15
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/html/semantics/scripting-1/the-script-element/script-runs-on-character-data-mutation.window.js:2:5

 1:22.89 INFO No more tests
 1:22.89 pid:1431 1773869930211	Marionette	INFO	Stopped listening on port 57885
 1:23.39 INFO Browser exited with return code -15
 1:23.26 INFO Closing logging queue
 1:23.26 INFO queue closed
 1:23.40 SUITE_END

web-platform-test
~~~~~~~~~~~~~~~~~
Ran 2 checks (1 subtests, 1 tests)
Expected results: 1
Unexpected results: 1
  subtest: 1 (1 fail)

Unexpected Results
------------------
/html/semantics/scripting-1/the-script-element/script-runs-on-character-data-mutation.window.html
  FAIL Script execution is never triggered on child mutation - assert_false: Setting CharacterData.data does not trigger execution expected false got true
@http://web-platform.test:8000/html/semantics/scripting-1/the-script-element/script-runs-on-character-data-mutation.window.js:22:15
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/html/semantics/scripting-1/the-script-element/script-runs-on-character-data-mutation.window.js:2:5
 1:23.40 INFO Got 1 unexpected results, with 0 unexpected passes
 1:23.40 wptserve INFO Stopped http server on 127.0.0.1:8001
 1:23.40 wptserve INFO Stopped http server on 127.0.0.1:8000
 1:23.40 wptserve INFO Stopped http server on 127.0.0.1:8444
 1:23.40 wptserve INFO Stopped http server on 127.0.0.1:8443
 1:23.40 wptserve INFO Stopped http server on 127.0.0.1:8446
 1:23.40 wptserve INFO Stopped http server on 127.0.0.1:8002
 1:23.40 wptserve INFO Stopped http server on 127.0.0.1:8445
 1:23.40 wptserve INFO Stopped http server on 127.0.0.1:8003
 1:23.42 wptserve INFO Stopped http server on 127.0.0.1:9000
 1:23.42 wptserve INFO Stopped WebTransport over HTTP/3 server on 127.0.0.1:11000
 1:23.52 wptserve INFO Close on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 1:23.52 wptserve INFO Close on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 1:23.57 INFO Removed font: Ahem.ttf
 1:23.59 INFO Closing logging queue
 1:23.59 INFO queue closed
 1:23.59 INFO Tolerating 1 unexpected results
[taskcluster 2026-03-18 21:38:52.275Z] === Task Finished ===
[taskcluster 2026-03-18 21:38:53.364Z] Successful task run with exit code: 0 completed in 220.476 seconds
View more details on Community-TC Integration