[taskcluster 2026-04-09 00:58:01.915Z] Task ID: aYDhsFeBS_eSc4VbE4CEjw
[taskcluster 2026-04-09 00:58:01.915Z] Worker ID: 1342829589826324352
[taskcluster 2026-04-09 00:58:01.915Z] Worker Group: us-east4-c
[taskcluster 2026-04-09 00:58:01.915Z] Worker Node Type: projects/757942385826/machineTypes/n2-standard-4
[taskcluster 2026-04-09 00:58:01.915Z] Worker Pool: proj-wpt/ci
[taskcluster 2026-04-09 00:58:01.915Z] Worker Version: 46.1.0
[taskcluster 2026-04-09 00:58:01.915Z] Public IP: 34.48.221.240
[taskcluster 2026-04-09 00:58:01.915Z] Hostname: proj-wpt-ci-pgebw-ews9mjjknbt4nvvg

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Failed to read: session.screen0.fullMaximization
Setting default value
Failed to read: session.screen0.maxIgnoreIncrement
Setting default value
Failed to read: session.screen0.maxDisableMove
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
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Failed to read: session.screen0.tabs.intitlebar
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Failed to read: session.screen0.focusModel
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Failed to read: session.screen0.tabFocusModel
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Failed to read: session.screen0.focusNewWindows
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Failed to read: session.screen0.focusSameHead
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Failed to read: session.screen0.rowPlacementDirection
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Failed to read: session.screen0.colPlacementDirection
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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
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Failed to read: session.screen0.slit.placement
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Failed to read: session.screen0.slit.alpha
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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
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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
 0:06.84 INFO Identified 2 affected tests
 0:06.84 INFO Installing browser
 0:06.86 INFO Downloading Chrome for Testing from https://storage.googleapis.com/chrome-for-testing-public/148.0.7766.3/linux64/chrome-linux64.zip
 0:10.01 INFO Downloading Mojo bindings from https://storage.googleapis.com/chrome-for-testing-public/148.0.7766.3/mojojs.zip
 0:10.05 INFO MojoJS enabled automatically (mojojs_path: /home/test/web-platform-tests/_venv3/mojojs/gen)
 0:10.08 INFO Download info for matching ChromeDriver version found.
 0:10.08 INFO Downloading ChromeDriver from https://storage.googleapis.com/chrome-for-testing-public/148.0.7766.3/linux64/chromedriver-linux64.zip
 0:10.34 INFO Automatically turning on experimental features
 0:16.05 INFO Installed font: Ahem.ttf
 0:17.02 wptserve INFO Starting http server on http://127.0.0.1:8002
 0:17.03 wptserve INFO Starting http server on http://127.0.0.1:8000
 0:17.07 wptserve INFO Starting http server on http://127.0.0.1:8001
 0:17.09 wptserve INFO Starting http server on http://127.0.0.1:8003
 0:17.11 wptserve INFO Starting https server on https://127.0.0.1:8444
 0:17.13 wptserve INFO Starting https server on https://127.0.0.1:8446
 0:17.13 wptserve INFO Create socket on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 0:17.14 wptserve INFO Bind on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 0:17.14 wptserve INFO Starting https server on https://127.0.0.1:8445
 0:17.14 wptserve INFO Listen on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 0:17.14 wptserve INFO Starting https server on https://127.0.0.1:8443
 0:17.15 wptserve INFO Create socket on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 0:17.15 wptserve INFO Bind on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 0:17.15 wptserve INFO Listen on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 0:17.17 wptserve INFO Starting http2 server on https://127.0.0.1:9000
 0:17.24 wptserve INFO Starting WebTransport over HTTP/3 server on 127.0.0.1:11000
 0:17.49 SUITE_START: web-platform-test - running 2 tests
 0:25.06 INFO Using 1 child processes
 0:25.06 INFO Starting WebDriver: /home/test/web-platform-tests/_venv3/bin/chrome/chromedriver --port=39107 --ignore-explicit-port --url-base=/ --enable-chrome-logs --disable-build-check
 0:25.08 INFO Got WebDriver port 44881
 0:25.17 pid:2203 Full command: /home/test/web-platform-tests/_venv3/bin/chrome/chromedriver --port=39107 --ignore-explicit-port --url-base=/ --enable-chrome-logs --disable-build-check
pid:2203 Starting ChromeDriver 148.0.7766.3 (bb1e9d2cbbe2eaf817259ed36b44cbe777103365-refs/branch-heads/7766@{#7}) on port 0
 0:25.17 pid:2203 Only local connections are allowed.
 0:25.17 pid:2203 Please see https://chromedriver.chromium.org/security-considerations for suggestions on keeping ChromeDriver safe.
 0:25.17 pid:2203 ChromeDriver was started successfully on port 44881.
 0:25.17 INFO Webdriver started successfully.
 0:25.17 INFO Starting runner
 0:26.43 pid:2203 [2255:2255:0409/010043.203687:WARNING:sandbox/policy/linux/sandbox_linux.cc:404] InitializeSandbox() called with multiple threads in process gpu-process.
 0:26.45 pid:2203 [2255:2255:0409/010043.208033:WARNING:ui/gfx/linux/gbm_support_x11.cc:48] dri3 extension not supported.
 0:26.46 pid:2203 [1775696443.236][WARNING]: You are using an unsupported command-line switch: --disable-build-check. Please don't report bugs that cannot be reproduced with this switch removed.
 0:26.57 pid:2203 Error: unrecognized flag --external_memory_accounted_in_global_limit
 0:26.57 pid:2203 Try --help for options
Failed to read: session.screen0.titlebar.left
Setting default value
Failed to read: session.screen0.titlebar.right
Setting default value
 0:26.59 pid:2203 [2220:2220:0409/010043.370794:ERROR:dbus/object_proxy.cc:572] Failed to call method: org.freedesktop.DBus.Properties.GetAll: object_path= /org/freedesktop/UPower/devices/DisplayDevice: org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.UPower was not provided by any .service files
 0:26.59 pid:2203 [2220:2220:0409/010043.370812:WARNING:dbus/property.cc:174] GetAll request failed for: org.freedesktop.UPower.Device
 0:26.62 pid:2203 [2220:2220:0409/010043.401493:WARNING:ui/base/idle/idle_linux.cc:111] None of the known D-Bus ScreenSaver services could be used.
 0:26.64 pid:2203 Error: unrecognized flag --external_memory_accounted_in_global_limit
 0:26.64 pid:2203 Try --help for options
 0:26.70 pid:2203 Error: unrecognized flag --external_memory_accounted_in_global_limit
 0:26.70 pid:2203 Try --help for options
 0:26.75 TEST_START: /html/semantics/forms/the-select-element/customizable-select/selectedcontent-mutations.html
 0:26.78 pid:2203 Error: unrecognized flag --external_memory_accounted_in_global_limit
 0:26.79 pid:2203 Try --help for options
 0:27.28 TEST_END: Test OK. Subtests passed 8/8. Unexpected 0
 0:27.28 TEST_START: /html/semantics/forms/the-select-element/customizable-select/selectedcontent-nested.html
 0:27.30 pid:2203 [2255:2255:0409/010044.075436:ERROR:gpu/command_buffer/service/shared_image/shared_image_manager.cc:253] SharedImageManager::ProduceSkia: Trying to Produce a Skia representation from a non-existent mailbox.
 0:27.31 pid:2203 Error: unrecognized flag --external_memory_accounted_in_global_limit
 0:27.31 pid:2203 Try --help for options
 0:27.62 TEST_END: Test OK. Subtests passed 1/1. Unexpected 0
 0:27.62 INFO No more tests
 0:27.67 INFO Closing logging queue
 0:27.67 INFO queue closed
 0:27.75 SUITE_END

web-platform-test
~~~~~~~~~~~~~~~~~
Ran 11 checks (9 subtests, 2 tests)
Expected results: 11
Unexpected results: 0
OK
 0:27.75 INFO Got 0 unexpected results, with 0 unexpected passes
 0:27.75 wptserve INFO Stopped http server on 127.0.0.1:8000
 0:27.75 wptserve INFO Stopped http server on 127.0.0.1:8001
 0:27.75 wptserve INFO Stopped http server on 127.0.0.1:8003
 0:27.75 wptserve INFO Stopped http server on 127.0.0.1:8443
 0:27.75 wptserve INFO Stopped http server on 127.0.0.1:8002
 0:27.77 wptserve INFO Stopped http server on 127.0.0.1:8444
 0:27.78 wptserve INFO Stopped http server on 127.0.0.1:8446
 0:27.78 wptserve INFO Stopped http server on 127.0.0.1:8445
 0:27.78 wptserve INFO Stopped http server on 127.0.0.1:9000
 0:27.78 wptserve INFO Stopped WebTransport over HTTP/3 server on 127.0.0.1:11000
 0:28.00 wptserve INFO Close on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 0:28.00 wptserve INFO Close on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 0:28.05 INFO Removed font: Ahem.ttf
 0:28.07 INFO Closing logging queue
 0:28.07 INFO queue closed
[taskcluster 2026-04-09 01:00:51.155Z] === Task Finished ===
[taskcluster 2026-04-09 01:00:52.951Z] Successful task run with exit code: 0 completed in 171.039 seconds