[taskcluster 2026-07-20 11:17:50.763Z] Task ID: Db_CJK8FRseHnqvp3iPXDg
[taskcluster 2026-07-20 11:17:50.763Z] Worker ID: 2097910163547627752
[taskcluster 2026-07-20 11:17:50.763Z] Worker Group: us-east1-b
[taskcluster 2026-07-20 11:17:50.763Z] Worker Node Type: projects/757942385826/machineTypes/n2-standard-4
[taskcluster 2026-07-20 11:17:50.763Z] Worker Pool: proj-wpt/ci
[taskcluster 2026-07-20 11:17:50.763Z] Worker Version: 46.1.0
[taskcluster 2026-07-20 11:17:50.763Z] Public IP: 35.243.234.10
[taskcluster 2026-07-20 11:17:50.763Z] Hostname: proj-wpt-ci-ivw6alcjtdawdsmadtsmtw

[taskcluster 2026-07-20 11:17:51.793Z] === 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

...(267 lines hidden)...

Failed to read: session.screen0.showwindowposition
Setting default value
Failed to read: session.screen0.autoRaise
Setting default value
Failed to read: session.screen0.clickRaises
Setting default value
Failed to read: session.screen0.defaultDeco
Setting default value
Failed to read: session.screen0.tab.placement
Setting default value
Failed to read: session.screen0.windowMenu
Setting default value
Failed to read: session.screen0.noFocusWhileTypingDelay
Setting default value
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'
 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
 0:37.98 INFO Identified 1 affected tests
 0:37.98 INFO Using certutil /usr/bin/certutil
 0:37.98 INFO Downloading geckodriver
 0:37.98 INFO Attempting to install webdriver from nightly
 0:38.26 INFO Extracted geckodriver to /home/test/web-platform-tests/_venv3/bin/geckodriver
 0:38.26 INFO Installed b'geckodriver 0.37.1 (300705c65d1b 2026-07-17 09:25 +0000)'
mem avail: 14637 of 15806 MiB (92.61%), swap free:    0 of    0 MiB ( 0.00%)
 0:44.08 INFO Getting profile data from git ref d951c4a19a6958816b35a228ff38fc6ae2c34f13
 0:44.29 INFO Test prefs downloaded to /home/test/web-platform-tests/_venv3/profiles/d951c4a19a6958816b35a228ff38fc6ae2c34f13/154.0a1
 0:44.29 INFO Downloading OpenH264 plugin
 0:50.52 INFO Downloading openh264.json from git ref d951c4a19a6958816b35a228ff38fc6ae2c34f13
 0:50.56 INFO Downloading OpenH264 plugin from https://ciscobinary.openh264.org/openh264-linux64-652bdb7719f30b52b08e506645a7322ff1b2cc6f.zip
 0:50.79 INFO OpenH264 plugin installed to /home/test/web-platform-tests/_venv3/browsers/nightly/gmp-gmpopenh264/2.6.0
 0:50.79 INFO Using OpenH264 plugin in /home/test/web-platform-tests/_venv3/browsers/nightly/gmp-gmpopenh264/2.6.0
[1951] Sandbox: CanCreateUserNamespace() clone() failure: EPERM
 0:50.85 mozversion INFO application_buildid: 20260719211319
 0:50.85 mozversion INFO application_changeset: 377d3fc52215f21c99a3163881df9cc446f12a3a
 0:50.85 mozversion INFO application_display_name: Firefox Nightly
 0:50.85 mozversion INFO application_id: {ec8030f7-c20a-464f-9b0e-13a3a9e97384}
 0:50.85 mozversion INFO application_name: Firefox
 0:50.85 mozversion INFO application_remotingname: firefox-nightly
 0:50.85 mozversion INFO application_repository: https://hg.mozilla.org/mozilla-central
 0:50.85 mozversion INFO application_vendor: Mozilla
 0:50.85 mozversion INFO application_version: 154.0a1
 0:50.85 mozversion INFO platform_buildid: 20260719211319
 0:50.85 mozversion INFO platform_changeset: 377d3fc52215f21c99a3163881df9cc446f12a3a
 0:50.85 mozversion INFO platform_repository: https://hg.mozilla.org/mozilla-central
 0:50.85 mozversion INFO platform_version: 154.0a1
 1:00.83 INFO Installed font: Ahem.ttf
 1:01.83 wptserve INFO Starting http server on http://127.0.0.1:8002
 1:01.83 wptserve INFO Starting http server on http://127.0.0.1:8000
 1:01.92 wptserve INFO Starting http server on http://127.0.0.1:8003
 1:01.94 wptserve INFO Starting https server on https://127.0.0.1:8446
 1:01.94 wptserve INFO Starting http server on http://127.0.0.1:8001
 1:01.95 wptserve INFO Starting https server on https://127.0.0.1:8443
 1:01.97 wptserve INFO Starting https server on https://127.0.0.1:8445
 1:01.99 wptserve INFO Starting https server on https://127.0.0.1:8444
 1:01.99 wptserve INFO Create socket on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 1:01.99 wptserve INFO Bind on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 1:01.99 wptserve INFO Listen on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 1:02.01 wptserve INFO Create socket on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 1:02.01 wptserve INFO Starting http2 server on https://127.0.0.1:9000
 1:02.01 wptserve INFO Bind on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 1:02.01 wptserve INFO Listen on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 1:02.07 wptserve INFO Starting WebTransport over HTTP/3 server on 127.0.0.1:11000
 1:02.35 SUITE_START: web-platform-test - running 1 tests
 1:08.42 INFO Using 1 child processes
 1:08.44 INFO Setting up ssl
 1:08.47 certutil Full command: /usr/bin/certutil -N -d /tmp/tmprbfe6np0.mozrunner -f /tmp/tmprbfe6np0.mozrunner/.crtdbpw
certutil b''
 1:08.49 certutil b''
 1:08.49 certutil b'\nCertificate Nickname                                         Trust Attributes\n                                                             SSL,S/MIME,JAR/XPI\n\nweb-platform-tests                                           CT,, \n'
 1:08.50 INFO Application command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank -profile /tmp/tmp6o94g8qr
 1:08.52 INFO Starting runner
 1:08.52 pid:2055 Full command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank
pid:2055 [2055] Sandbox: CanCreateUserNamespace() clone() failure: EPERM
 1:09.09 pid:2055 1784546413083	Marionette	INFO	Marionette enabled
 1:09.19 pid:2055 1784546413188	Marionette	INFO	Listening on port 57369
Failed to read: session.screen0.titlebar.left
Setting default value
Failed to read: session.screen0.titlebar.right
Setting default value
 1:11.64 pid:2055 console.error: services.settings:
 1:11.65 pid:2055   Message: EmptyDatabaseError: "main/nimbus-desktop-experiments" has not been synced yet
 1:11.65 pid:2055   Stack:
 1:11.65 pid:2055     EmptyDatabaseError@resource://services-settings/Database.sys.mjs:19:5
 1:11.65 pid:2055 list@resource://services-settings/Database.sys.mjs:96:13
 1:12.11 TEST_START: /editing/crashtests/forwarddelete-after-editable-slot-element-outside-body.html
 1:12.27 TEST_END: PASS
 1:12.27 INFO No more tests
 1:12.27 pid:2055 1784546416264	Marionette	INFO	Stopped listening on port 57369
 1:12.78 INFO Browser exited with return code 0
 1:12.58 INFO Closing logging queue
 1:12.58 INFO queue closed
 1:12.79 SUITE_END

web-platform-test
~~~~~~~~~~~~~~~~~
Ran 1 checks (1 tests)
Expected results: 1
Unexpected results: 0
OK
 1:12.79 INFO Got 0 unexpected results, with 0 unexpected passes
 1:12.79 wptserve INFO Stopped http server on 127.0.0.1:8001
 1:12.79 wptserve INFO Stopped http server on 127.0.0.1:8003
 1:12.80 wptserve INFO Stopped http server on 127.0.0.1:8443
 1:12.80 wptserve INFO Stopped http server on 127.0.0.1:8000
 1:12.80 wptserve INFO Stopped http server on 127.0.0.1:8002
 1:12.80 wptserve INFO Stopped http server on 127.0.0.1:8444
 1:12.81 wptserve INFO Stopped http server on 127.0.0.1:8445
 1:12.81 wptserve INFO Stopped http server on 127.0.0.1:8446
 1:12.82 wptserve INFO Stopped WebTransport over HTTP/3 server on 127.0.0.1:11000
 1:12.82 wptserve INFO Stopped http server on 127.0.0.1:9000
 1:12.87 wptserve INFO Close on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 1:12.87 wptserve INFO Close on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 1:12.98 INFO Removed font: Ahem.ttf
 1:13.01 INFO Closing logging queue
 1:13.01 INFO queue closed
[taskcluster 2026-07-20 11:20:20.057Z] === Task Finished ===
[taskcluster 2026-07-20 11:20:21.116Z] Successful task run with exit code: 0 completed in 150.353 seconds