WebKit export of https://bugs.webkit.org/show_bug.cgi?id=320558 - #62133

[taskcluster 2026-08-22 05:10:04.804Z] Task ID: aFoCUFPlSNeQZpsgGUq9tQ
[taskcluster 2026-08-22 05:10:04.804Z] Worker ID: 1032227171355373524
[taskcluster 2026-08-22 05:10:04.804Z] Worker Group: us-central1-b
[taskcluster 2026-08-22 05:10:04.804Z] Worker Node Type: projects/757942385826/machineTypes/n2-standard-4
[taskcluster 2026-08-22 05:10:04.804Z] Worker Pool: proj-wpt/ci
[taskcluster 2026-08-22 05:10:04.804Z] Worker Version: 46.1.0
[taskcluster 2026-08-22 05:10:04.804Z] Public IP: 35.192.224.159
[taskcluster 2026-08-22 05:10:04.804Z] Hostname: proj-wpt-ci-rsyl4jbmtc6il9eujf2bmq

[taskcluster 2026-08-22 05:10:05.973Z] === 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

...(268 lines hidden)...

Setting default value
Failed to read: session.screen0.maxDisableResize
Setting default value
Failed to read: session.screen0.workspacewarping
Setting default value
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
 0:52.19 INFO Identified 1 affected tests
 0:52.19 INFO Using certutil /usr/bin/certutil
 0:52.19 INFO Downloading geckodriver
 0:52.19 INFO Attempting to install webdriver from nightly
 0:52.54 INFO Extracted geckodriver to /home/test/web-platform-tests/_venv3/bin/geckodriver
 0:52.54 INFO Installed b'geckodriver 0.37.1 (75b411853549 2026-08-18 09:18 +0000)'
 0:52.81 INFO Getting profile data from git ref 22598deb7560ad7baef8c8f5082dcfc1e92efd54
 0:53.04 INFO Test prefs downloaded to /home/test/web-platform-tests/_venv3/profiles/22598deb7560ad7baef8c8f5082dcfc1e92efd54/156.0a1
 0:53.04 INFO Downloading OpenH264 plugin
 0:53.26 INFO Downloading openh264.json from git ref 22598deb7560ad7baef8c8f5082dcfc1e92efd54
 0:53.31 INFO Downloading OpenH264 plugin from https://ciscobinary.openh264.org/openh264-linux64-652bdb7719f30b52b08e506645a7322ff1b2cc6f.zip
 0:53.54 INFO OpenH264 plugin installed to /home/test/web-platform-tests/_venv3/browsers/nightly/gmp-gmpopenh264/2.6.0
 0:53.54 INFO Using OpenH264 plugin in /home/test/web-platform-tests/_venv3/browsers/nightly/gmp-gmpopenh264/2.6.0
[1947] Sandbox: CanCreateUserNamespace() clone() failure: EPERM
 0:53.65 mozversion INFO application_buildid: 20260821213723
 0:53.65 mozversion INFO application_changeset: ebbc8065667b64de4786095ba78e58da9d2a4a60
 0:53.65 mozversion INFO application_display_name: Firefox Nightly
 0:53.65 mozversion INFO application_id: {ec8030f7-c20a-464f-9b0e-13a3a9e97384}
 0:53.65 mozversion INFO application_name: Firefox
 0:53.65 mozversion INFO application_remotingname: firefox-nightly
 0:53.65 mozversion INFO application_repository: https://hg.mozilla.org/mozilla-central
 0:53.65 mozversion INFO application_vendor: Mozilla
 0:53.65 mozversion INFO application_version: 156.0a1
 0:53.65 mozversion INFO platform_buildid: 20260821213723
 0:53.65 mozversion INFO platform_changeset: ebbc8065667b64de4786095ba78e58da9d2a4a60
 0:53.65 mozversion INFO platform_repository: https://hg.mozilla.org/mozilla-central
 0:53.65 mozversion INFO platform_version: 156.0a1
 1:03.54 INFO Installed font: Ahem.ttf
 1:04.47 wptserve INFO Starting http server on http://127.0.0.1:8000
 1:04.49 wptserve INFO Starting http server on http://127.0.0.1:8002
 1:04.54 wptserve INFO Starting http server on http://127.0.0.1:8003
 1:04.56 wptserve INFO Starting https server on https://127.0.0.1:8446
 1:04.57 wptserve INFO Starting https server on https://127.0.0.1:8445
 1:04.57 wptserve INFO Starting http server on http://127.0.0.1:8001
 1:04.58 wptserve INFO Starting https server on https://127.0.0.1:8443
 1:04.60 wptserve INFO Create socket on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 1:04.60 wptserve INFO Bind on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 1:04.60 wptserve INFO Listen on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 1:04.60 wptserve INFO Starting https server on https://127.0.0.1:8444
 1:04.62 wptserve INFO Create socket on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 1:04.62 wptserve INFO Bind on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 1:04.62 wptserve INFO Listen on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 1:04.62 wptserve INFO Starting http2 server on https://127.0.0.1:9000
 1:04.67 wptserve INFO Starting WebTransport over HTTP/3 server on 127.0.0.1:11000
 1:04.95 SUITE_START: web-platform-test - running 1 tests
mem avail: 14183 of 15806 MiB (89.73%), swap free:    0 of    0 MiB ( 0.00%)
 1:21.18 INFO Using 1 child processes
 1:21.20 INFO Setting up ssl
 1:21.22 certutil Full command: /usr/bin/certutil -N -d /tmp/tmp0jbkyu5k.mozrunner -f /tmp/tmp0jbkyu5k.mozrunner/.crtdbpw
certutil b''
 1:21.25 certutil b''
 1:21.25 certutil b'\nCertificate Nickname                                         Trust Attributes\n                                                             SSL,S/MIME,JAR/XPI\n\nweb-platform-tests                                           CT,, \n'
 1:21.26 INFO Application command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank -profile /tmp/tmp9tyhnnd0
 1:21.28 INFO Starting runner
 1:21.28 pid:2051 Full command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank
pid:2051 [2051] Sandbox: CanCreateUserNamespace() clone() failure: EPERM
 1:22.29 pid:2051 1787375655202	Marionette	INFO	Marionette enabled
 1:22.58 pid:2051 1787375655493	Marionette	INFO	Listening on port 52323
Failed to read: session.screen0.titlebar.left
Setting default value
Failed to read: session.screen0.titlebar.right
Setting default value
 1:25.44 pid:2051 [GFX1-]: Calling WaitFlushedEvent::Run: is delayed: 2246
 1:26.22 pid:2051 console.error: services.settings:
 1:26.22 pid:2051   Message: EmptyDatabaseError: "main/nimbus-desktop-experiments" has not been synced yet
 1:26.22 pid:2051   Stack:
 1:26.22 pid:2051     EmptyDatabaseError@resource://services-settings/Database.sys.mjs:19:5
 1:26.22 pid:2051 list@resource://services-settings/Database.sys.mjs:96:13
 1:26.83 TEST_START: /css/css-flexbox/flexbox-baseline-and-last-baseline-groups-line-size.html
 1:27.30 TEST_END: Test OK. Subtests passed 2/2. Unexpected 0
 1:27.30 INFO No more tests
 1:27.30 pid:2051 1787375660217	Marionette	INFO	Stopped listening on port 52323
 1:27.83 INFO Browser exited with return code 0
 1:27.64 INFO Closing logging queue
 1:27.64 INFO queue closed
 1:27.84 SUITE_END

web-platform-test
~~~~~~~~~~~~~~~~~
Ran 3 checks (2 subtests, 1 tests)
Expected results: 3
Unexpected results: 0
OK
 1:27.84 INFO Got 0 unexpected results, with 0 unexpected passes
 1:27.84 wptserve INFO Stopped http server on 127.0.0.1:8001
 1:27.84 wptserve INFO Stopped http server on 127.0.0.1:8000
 1:27.84 wptserve INFO Stopped http server on 127.0.0.1:8002
 1:27.84 wptserve INFO Stopped http server on 127.0.0.1:8003
 1:27.85 wptserve INFO Stopped http server on 127.0.0.1:8443
 1:27.85 wptserve INFO Stopped http server on 127.0.0.1:8446
 1:27.85 wptserve INFO Stopped http server on 127.0.0.1:9000
 1:27.85 wptserve INFO Stopped http server on 127.0.0.1:8445
 1:27.85 wptserve INFO Stopped http server on 127.0.0.1:8444
 1:27.86 wptserve INFO Stopped WebTransport over HTTP/3 server on 127.0.0.1:11000
 1:27.97 wptserve INFO Close on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 1:27.97 wptserve INFO Close on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 1:28.03 INFO Removed font: Ahem.ttf
 1:28.06 INFO Closing logging queue
 1:28.06 INFO queue closed
[taskcluster 2026-08-22 05:14:23.989Z] === Task Finished ===
[taskcluster 2026-08-22 05:14:25.076Z] Successful task run with exit code: 0 completed in 260.273 seconds