Reject strings in ReadableStream.from - #59594

[taskcluster 2026-06-20 20:47:14.250Z] Task ID: d_vSi5FGRzutciXQSVtlow
[taskcluster 2026-06-20 20:47:14.250Z] Worker ID: 4296303879967687366
[taskcluster 2026-06-20 20:47:14.250Z] Worker Group: us-east1-b
[taskcluster 2026-06-20 20:47:14.250Z] Worker Node Type: projects/757942385826/machineTypes/n2-standard-4
[taskcluster 2026-06-20 20:47:14.250Z] Worker Pool: proj-wpt/ci
[taskcluster 2026-06-20 20:47:14.250Z] Worker Version: 46.1.0
[taskcluster 2026-06-20 20:47:14.250Z] Public IP: 104.196.58.165
[taskcluster 2026-06-20 20:47:14.250Z] Hostname: proj-wpt-ci-dvjirtk9tpgbrit5ekm3-a

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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_android' for argument registration: No module named 'mozrunner'
Warning: could not load product 'firefox' for argument registration: No module named 'mozleak'
 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
 0:31.72 INFO Identified 1 affected tests
 0:31.72 INFO Using certutil /usr/bin/certutil
 0:31.72 INFO Downloading geckodriver
 0:31.72 INFO Attempting to install webdriver from nightly
 0:32.10 INFO Extracted geckodriver to /home/test/web-platform-tests/_venv3/bin/geckodriver
 0:32.10 INFO Installed b'geckodriver 0.37.0 (f7f8e60b2f7e 2026-06-09 06:19 +0000)'
 0:37.77 INFO Getting profile data from git ref 3853f3f0a8a97c9c3a9497ed6d0af7dc7cf6c51c
 0:38.28 INFO Test prefs downloaded to /home/test/web-platform-tests/_venv3/profiles/3853f3f0a8a97c9c3a9497ed6d0af7dc7cf6c51c/154.0a1
 0:38.28 INFO Downloading OpenH264 plugin
mem avail: 14637 of 15806 MiB (92.61%), swap free:    0 of    0 MiB ( 0.00%)
 0:45.09 INFO Downloading openh264.json from git ref 3853f3f0a8a97c9c3a9497ed6d0af7dc7cf6c51c
 0:45.18 INFO Downloading OpenH264 plugin from https://ciscobinary.openh264.org/openh264-linux64-652bdb7719f30b52b08e506645a7322ff1b2cc6f.zip
 0:45.40 INFO OpenH264 plugin installed to /home/test/web-platform-tests/_venv3/browsers/nightly/gmp-gmpopenh264/2.6.0
 0:45.40 INFO Using OpenH264 plugin in /home/test/web-platform-tests/_venv3/browsers/nightly/gmp-gmpopenh264/2.6.0
[1946] Sandbox: CanCreateUserNamespace() clone() failure: EPERM
 0:45.45 mozversion INFO application_buildid: 20260620160029
 0:45.45 mozversion INFO application_changeset: 5ebe17a367f832f409b0780f4b01bc6bb885739e
 0:45.45 mozversion INFO application_display_name: Firefox Nightly
 0:45.45 mozversion INFO application_id: {ec8030f7-c20a-464f-9b0e-13a3a9e97384}
 0:45.45 mozversion INFO application_name: Firefox
 0:45.45 mozversion INFO application_remotingname: firefox-nightly
 0:45.45 mozversion INFO application_repository: https://hg.mozilla.org/mozilla-central
 0:45.45 mozversion INFO application_vendor: Mozilla
 0:45.45 mozversion INFO application_version: 154.0a1
 0:45.45 mozversion INFO platform_buildid: 20260620160029
 0:45.45 mozversion INFO platform_changeset: 5ebe17a367f832f409b0780f4b01bc6bb885739e
 0:45.45 mozversion INFO platform_repository: https://hg.mozilla.org/mozilla-central
 0:45.45 mozversion INFO platform_version: 154.0a1
 0:55.06 INFO Installed font: Ahem.ttf
 0:55.99 wptserve INFO Starting http server on http://127.0.0.1:8002
 0:56.00 wptserve INFO Starting http server on http://127.0.0.1:8000
 0:56.02 wptserve INFO Starting http server on http://127.0.0.1:8003
 0:56.04 wptserve INFO Starting http server on http://127.0.0.1:8001
 0:56.04 wptserve INFO Starting https server on https://127.0.0.1:8444
 0:56.06 wptserve INFO Starting https server on https://127.0.0.1:8446
 0:56.08 wptserve INFO Starting http2 server on https://127.0.0.1:9000
 0:56.08 wptserve INFO Starting https server on https://127.0.0.1:8443
 0:56.08 wptserve INFO Starting https server on https://127.0.0.1:8445
 0:56.09 wptserve INFO Create socket on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 0:56.10 wptserve INFO Bind on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 0:56.10 wptserve INFO Listen on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 0:56.10 wptserve INFO Create socket on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 0:56.10 wptserve INFO Bind on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 0:56.10 wptserve INFO Listen on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 0:56.18 wptserve INFO Starting WebTransport over HTTP/3 server on 127.0.0.1:11000
 0:56.44 SUITE_START: web-platform-test - running 4 tests
 1:08.50 INFO Using 1 child processes
 1:08.51 INFO Setting up ssl
 1:08.53 certutil Full command: /usr/bin/certutil -N -d /tmp/tmpp2_y7o52.mozrunner -f /tmp/tmpp2_y7o52.mozrunner/.crtdbpw
certutil b''
 1:08.55 certutil b''
 1:08.55 certutil b'\nCertificate Nickname                                         Trust Attributes\n                                                             SSL,S/MIME,JAR/XPI\n\nweb-platform-tests                                           CT,, \n'
 1:08.55 INFO Application command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank -profile /tmp/tmpbfxlfe9t
 1:08.57 INFO Starting runner
 1:08.57 pid:2050 Full command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank
pid:2050 [2050] Sandbox: CanCreateUserNamespace() clone() failure: EPERM
 1:09.08 pid:2050 1781988627290	Marionette	INFO	Marionette enabled
 1:09.18 pid:2050 1781988627386	Marionette	INFO	Listening on port 57387
Failed to read: session.screen0.titlebar.left
Setting default value
Failed to read: session.screen0.titlebar.right
Setting default value
 1:11.50 pid:2050 console.error: services.settings:
 1:11.50 pid:2050   Message: EmptyDatabaseError: "main/nimbus-desktop-experiments" has not been synced yet
 1:11.50 pid:2050   Stack:
 1:11.50 pid:2050     EmptyDatabaseError@resource://services-settings/Database.sys.mjs:19:5
 1:11.50 pid:2050 list@resource://services-settings/Database.sys.mjs:96:13
 1:12.12 TEST_START: /streams/readable-streams/from.any.sharedworker.html
 1:12.73 TEST_END: Test OK. Subtests passed 50/50. Unexpected 0
 1:12.73 TEST_START: /streams/readable-streams/from.any.serviceworker.html
 1:12.73 INFO Closing window 12adb455-e136-48a9-a208-639bbb3f0a36
 1:13.38 TEST_END: Test OK. Subtests passed 50/50. Unexpected 0
 1:13.38 TEST_START: /streams/readable-streams/from.any.worker.html
 1:13.38 INFO Closing window 7bdcc88d-a293-400f-a951-66ada828c12c
 1:13.64 TEST_END: Test OK. Subtests passed 50/50. Unexpected 0
 1:13.64 TEST_START: /streams/readable-streams/from.any.html
 1:13.65 INFO Closing window 91622dfa-7cf4-41db-b1bf-f17a3689912b
 1:13.86 TEST_END: Test OK. Subtests passed 50/50. Unexpected 0
 1:13.86 INFO No more tests
 1:13.86 pid:2050 1781988632066	Marionette	INFO	Stopped listening on port 57387
 1:14.32 INFO Browser exited with return code 0
 1:14.13 INFO Closing logging queue
 1:14.13 INFO queue closed
 1:14.33 SUITE_END

web-platform-test
~~~~~~~~~~~~~~~~~
Ran 204 checks (200 subtests, 4 tests)
Expected results: 204
Unexpected results: 0
OK
 1:14.33 INFO Got 0 unexpected results, with 0 unexpected passes
 1:14.33 wptserve INFO Stopped http server on 127.0.0.1:8000
 1:14.33 wptserve INFO Stopped http server on 127.0.0.1:8001
 1:14.33 wptserve INFO Stopped http server on 127.0.0.1:8002
 1:14.33 wptserve INFO Stopped http server on 127.0.0.1:8003
 1:14.34 wptserve INFO Stopped http server on 127.0.0.1:8443
 1:14.34 wptserve INFO Stopped http server on 127.0.0.1:8444
 1:14.34 wptserve INFO Stopped http server on 127.0.0.1:8446
 1:14.35 wptserve INFO Stopped http server on 127.0.0.1:8445
 1:14.35 wptserve INFO Stopped http server on 127.0.0.1:9000
 1:14.36 wptserve INFO Stopped WebTransport over HTTP/3 server on 127.0.0.1:11000
 1:14.46 wptserve INFO Close on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 1:14.46 wptserve INFO Close on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 1:14.49 INFO Removed font: Ahem.ttf
 1:14.52 INFO Closing logging queue
 1:14.52 INFO queue closed
[taskcluster 2026-06-20 20:50:35.391Z] === Task Finished ===
[taskcluster 2026-06-20 20:50:36.648Z] Successful task run with exit code: 0 completed in 202.401 seconds