[taskcluster 2026-01-10 00:13:16.392Z] Task ID: ENBPeB-zQA-hA4q95w0M6Q
[taskcluster 2026-01-10 00:13:16.392Z] Worker ID: 4690775507804670851
[taskcluster 2026-01-10 00:13:16.392Z] Worker Group: us-central1-a
[taskcluster 2026-01-10 00:13:16.392Z] Worker Node Type: projects/757942385826/machineTypes/n2-standard-4
[taskcluster 2026-01-10 00:13:16.392Z] Worker Pool: proj-wpt/ci
[taskcluster 2026-01-10 00:13:16.392Z] Worker Version: 46.1.0
[taskcluster 2026-01-10 00:13:16.392Z] Public IP: 34.29.233.214
[taskcluster 2026-01-10 00:13:16.392Z] Hostname: proj-wpt-ci-jtsq6-5qrccqereyyj8kwa

[taskcluster 2026-01-10 00:13:17.419Z] === 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

...(611 lines hidden)...

 1:08.62 pid:3253 console.error: services.settings:
 1:08.62 pid:3253   Message: EmptyDatabaseError: "main/nimbus-desktop-experiments" has not been synced yet
 1:08.62 pid:3253   Stack:
 1:08.62 pid:3253     EmptyDatabaseError@resource://services-settings/Database.sys.mjs:19:5
 1:08.62 pid:3253 list@resource://services-settings/Database.sys.mjs:96:13
 1:08.71 pid:3253 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 1245"  data: no]
 1:08.95 TEST_START: /html/semantics/embedded-content/media-elements/playing-the-media-resource/fragmented-mp4-end.html
 1:09.61 TEST_END: Test OK. Subtests passed 1/1. Unexpected 0
 1:09.61 INFO No more tests
 1:09.62 pid:3253 1768004280016	Marionette	INFO	Stopped listening on port 46425
 1:10.30 INFO Browser exited with return code -15
 1:10.17 INFO Closing logging queue
 1:10.17 INFO queue closed
 1:10.30 SUITE_END

web-platform-test
~~~~~~~~~~~~~~~~~
Ran 12 checks (6 subtests, 6 tests)
Expected results: 12
Unexpected results: 0
OK
 1:10.30 INFO Got 0 unexpected results, with 0 unexpected passes
 1:10.30 INFO Repetition 7 / 10
 1:10.30 SUITE_START: web-platform-test - running 1 tests
 1:10.30 INFO Using 1 child processes
 1:10.31 INFO Setting up ssl
 1:10.33 certutil b''
 1:10.35 certutil b''
 1:10.36 certutil b'\nCertificate Nickname                                         Trust Attributes\n                                                             SSL,S/MIME,JAR/XPI\n\nweb-platform-tests                                           CT,, \n'
 1:10.36 INFO Application command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank -profile /tmp/tmptvsgp3l_
 1:10.37 INFO Starting runner
 1:10.37 pid:3645 Full command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank
pid:3645 [3645] Sandbox: CanCreateUserNamespace() clone() failure: EPERM
 1:10.89 pid:3645 1768004281294	Marionette	INFO	Marionette enabled
 1:11.00 pid:3645 1768004281404	Marionette	INFO	Listening on port 33979
 1:11.92 pid:3645 console.error: services.settings:
 1:11.92 pid:3645   Message: EmptyDatabaseError: "main/nimbus-desktop-experiments" has not been synced yet
 1:11.92 pid:3645   Stack:
 1:11.92 pid:3645     EmptyDatabaseError@resource://services-settings/Database.sys.mjs:19:5
 1:11.93 pid:3645 list@resource://services-settings/Database.sys.mjs:96:13
 1:12.09 pid:3645 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 1245"  data: no]
 1:12.33 TEST_START: /html/semantics/embedded-content/media-elements/playing-the-media-resource/fragmented-mp4-end.html
 1:12.98 TEST_END: Test OK. Subtests passed 1/1. Unexpected 0
 1:12.98 INFO No more tests
 1:12.98 pid:3645 1768004283382	Marionette	INFO	Stopped listening on port 33979
mem avail: 13876 of 15806 MiB (87.79%), swap free:    0 of    0 MiB ( 0.00%)
 1:13.67 INFO Browser exited with return code -15
 1:13.55 INFO Closing logging queue
 1:13.56 INFO queue closed
 1:13.68 SUITE_END

web-platform-test
~~~~~~~~~~~~~~~~~
Ran 14 checks (7 subtests, 7 tests)
Expected results: 14
Unexpected results: 0
OK
 1:13.68 INFO Got 0 unexpected results, with 0 unexpected passes
 1:13.68 INFO Repetition 8 / 10
 1:13.68 SUITE_START: web-platform-test - running 1 tests
 1:13.68 INFO Using 1 child processes
 1:13.69 INFO Setting up ssl
 1:13.71 certutil b''
 1:13.72 certutil b''
 1:13.73 certutil b'\nCertificate Nickname                                         Trust Attributes\n                                                             SSL,S/MIME,JAR/XPI\n\nweb-platform-tests                                           CT,, \n'
 1:13.73 INFO Application command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank -profile /tmp/tmpvaj3nspi
 1:13.74 INFO Starting runner
 1:13.74 pid:4038 Full command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank
pid:4038 [4038] Sandbox: CanCreateUserNamespace() clone() failure: EPERM
 1:14.23 pid:4038 1768004284627	Marionette	INFO	Marionette enabled
 1:14.33 pid:4038 1768004284733	Marionette	INFO	Listening on port 48811
 1:14.34 pid:4038 [Parent 4038, Main Thread] WARNING: Failed to create DBus proxy for org.a11y.Bus: Could not connect: Connection refused
 1:14.34 pid:4038 : 'glib warning', file /builds/worker/checkouts/gecko/toolkit/xre/nsSigHandlers.cpp:201
 1:14.34 pid:4038 ** (firefox-nightly:4038): WARNING **: 00:18:04.739: Failed to create DBus proxy for org.a11y.Bus: Could not connect: Connection refused
 1:15.29 pid:4038 console.error: services.settings:
 1:15.29 pid:4038   Message: EmptyDatabaseError: "main/nimbus-desktop-experiments" has not been synced yet
 1:15.29 pid:4038   Stack:
 1:15.29 pid:4038     EmptyDatabaseError@resource://services-settings/Database.sys.mjs:19:5
 1:15.29 pid:4038 list@resource://services-settings/Database.sys.mjs:96:13
 1:15.43 pid:4038 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 1245"  data: no]
 1:15.65 TEST_START: /html/semantics/embedded-content/media-elements/playing-the-media-resource/fragmented-mp4-end.html
 1:16.29 TEST_END: Test OK. Subtests passed 1/1. Unexpected 0
 1:16.29 INFO No more tests
 1:16.29 pid:4038 1768004286690	Marionette	INFO	Stopped listening on port 48811
 1:16.96 INFO Browser exited with return code -15
 1:16.84 INFO Closing logging queue
 1:16.84 INFO queue closed
 1:16.97 SUITE_END

web-platform-test
~~~~~~~~~~~~~~~~~
Ran 16 checks (8 subtests, 8 tests)
Expected results: 16
Unexpected results: 0
OK
 1:16.97 INFO Got 0 unexpected results, with 0 unexpected passes
 1:16.97 INFO Repetition 9 / 10
 1:16.97 SUITE_START: web-platform-test - running 1 tests
 1:16.97 INFO Using 1 child processes
 1:16.98 INFO Setting up ssl
 1:16.99 certutil b''
 1:17.01 certutil b''
 1:17.02 certutil b'\nCertificate Nickname                                         Trust Attributes\n                                                             SSL,S/MIME,JAR/XPI\n\nweb-platform-tests                                           CT,, \n'
 1:17.02 INFO Application command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank -profile /tmp/tmp04r498xa
 1:17.03 INFO Starting runner
 1:17.03 pid:4428 Full command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank
pid:4428 [4428] Sandbox: CanCreateUserNamespace() clone() failure: EPERM
 1:17.56 pid:4428 1768004287961	Marionette	INFO	Marionette enabled
 1:17.67 pid:4428 1768004288068	Marionette	INFO	Listening on port 47135
 1:18.58 pid:4428 console.error: services.settings:
 1:18.59 pid:4428   Message: EmptyDatabaseError: "main/nimbus-desktop-experiments" has not been synced yet
 1:18.59 pid:4428   Stack:
 1:18.59 pid:4428     EmptyDatabaseError@resource://services-settings/Database.sys.mjs:19:5
 1:18.59 pid:4428 list@resource://services-settings/Database.sys.mjs:96:13
 1:18.74 pid:4428 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 1245"  data: no]
 1:18.97 TEST_START: /html/semantics/embedded-content/media-elements/playing-the-media-resource/fragmented-mp4-end.html
 1:19.63 TEST_END: Test OK. Subtests passed 1/1. Unexpected 0
 1:19.63 INFO No more tests
 1:19.64 pid:4428 1768004290028	Marionette	INFO	Stopped listening on port 47135
 1:20.29 INFO Browser exited with return code -15
 1:20.17 INFO Closing logging queue
 1:20.17 INFO queue closed
 1:20.30 SUITE_END

web-platform-test
~~~~~~~~~~~~~~~~~
Ran 18 checks (9 subtests, 9 tests)
Expected results: 18
Unexpected results: 0
OK
 1:20.30 INFO Got 0 unexpected results, with 0 unexpected passes
 1:20.30 INFO Repetition 10 / 10
 1:20.30 SUITE_START: web-platform-test - running 1 tests
 1:20.30 INFO Using 1 child processes
 1:20.31 INFO Setting up ssl
 1:20.33 certutil b''
 1:20.34 certutil b''
 1:20.35 certutil b'\nCertificate Nickname                                         Trust Attributes\n                                                             SSL,S/MIME,JAR/XPI\n\nweb-platform-tests                                           CT,, \n'
 1:20.35 INFO Application command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank -profile /tmp/tmpiau0ny8z
 1:20.36 INFO Starting runner
 1:20.36 pid:4827 Full command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank
pid:4827 [4827] Sandbox: CanCreateUserNamespace() clone() failure: EPERM
 1:20.84 pid:4827 1768004291241	Marionette	INFO	Marionette enabled
 1:20.94 pid:4827 1768004291345	Marionette	INFO	Listening on port 41431
 1:20.95 pid:4827 [Parent 4827, Main Thread] WARNING: Failed to create DBus proxy for org.a11y.Bus: Could not connect: Connection refused
 1:20.95 pid:4827 : 'glib warning', file /builds/worker/checkouts/gecko/toolkit/xre/nsSigHandlers.cpp:201
 1:20.95 pid:4827 ** (firefox-nightly:4827): WARNING **: 00:18:11.352: Failed to create DBus proxy for org.a11y.Bus: Could not connect: Connection refused
 1:21.86 pid:4827 console.error: services.settings:
 1:21.86 pid:4827   Message: EmptyDatabaseError: "main/nimbus-desktop-experiments" has not been synced yet
 1:21.86 pid:4827   Stack:
 1:21.86 pid:4827     EmptyDatabaseError@resource://services-settings/Database.sys.mjs:19:5
 1:21.86 pid:4827 list@resource://services-settings/Database.sys.mjs:96:13
 1:21.99 pid:4827 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 1245"  data: no]
 1:22.22 TEST_START: /html/semantics/embedded-content/media-elements/playing-the-media-resource/fragmented-mp4-end.html
 1:22.86 TEST_END: Test OK. Subtests passed 1/1. Unexpected 0
 1:22.86 INFO No more tests
 1:22.86 pid:4827 1768004293263	Marionette	INFO	Stopped listening on port 41431
 1:23.61 INFO Browser exited with return code -15
 1:23.48 INFO Closing logging queue
 1:23.48 INFO queue closed
 1:23.62 SUITE_END

web-platform-test
~~~~~~~~~~~~~~~~~
Ran 20 checks (10 subtests, 10 tests)
Expected results: 20
Unexpected results: 0
OK
 1:23.62 INFO Got 0 unexpected results, with 0 unexpected passes
 1:23.62 wptserve INFO Stopped http server on 127.0.0.1:8000
 1:23.62 wptserve INFO Stopped http server on 127.0.0.1:8002
 1:23.63 wptserve INFO Stopped http server on 127.0.0.1:8443
 1:23.63 wptserve INFO Stopped http server on 127.0.0.1:8003
 1:23.63 wptserve INFO Stopped http server on 127.0.0.1:8001
 1:23.64 wptserve INFO Stopped http server on 127.0.0.1:8444
 1:23.64 wptserve INFO Stopped http server on 127.0.0.1:8446
 1:23.64 wptserve INFO Stopped http server on 127.0.0.1:8445
 1:23.64 wptserve INFO Stopped http server on 127.0.0.1:9000
 1:23.64 wptserve INFO Stopped WebTransport over HTTP/3 server on 127.0.0.1:11000
 1:23.73 wptserve INFO Close on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 1:23.73 wptserve INFO Close on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 1:23.77 INFO Removed font: Ahem.ttf
 1:23.79 INFO Closing logging queue
 1:23.79 INFO queue closed
 1:23.80 INFO ::: Ran 10 of expected 10 iterations.
 1:23.80 INFO ## All results ##

 1:23.80 INFO ### /html/semantics/embedded-content/media-elements/playing-the-media-resource/fragmented-mp4-end.html ###
 1:23.80 INFO |       Subtest        | Results | Messages |
 1:23.80 INFO |----------------------|---------|----------|
 1:23.80 INFO |                      | OK      |          |
 1:23.80 INFO | `fragmented-mp4-end` | PASS    |          |
 1:23.80 INFO 
 1:23.80 INFO ::: Running tests in a loop with restarts 10 times : PASS
 1:23.80 INFO :::
 1:23.80 INFO ::: Test verification PASS
 1:23.80 INFO :::
[taskcluster 2026-01-10 00:18:15.829Z] === Task Finished ===
[taskcluster 2026-01-10 00:18:16.218Z] Successful task run with exit code: 0 completed in 299.826 seconds