layout: Fix abspos position when it would be preceded by phantom line #57757
+160
−0
Community-TC Integration / wpt-firefox-nightly-stability
succeeded
Feb 26, 2026 in 3m 53s
Community-TC (pull_request)
Verify that all tests affected by a pull request are stable when executed in firefox.
Details
View task in Taskcluster | View logs in Taskcluster | View task group in Taskcluster
Task Status
Started: 2026-02-26T01:45:50.001Z
Resolved: 2026-02-26T01:48:32.736Z
Task Execution Time: 2 minutes, 42 seconds, 735 milliseconds
Task Status: completed
Reason Resolved: completed
TaskId: SzdtvACiSz-EdEW74rwySQ
RunId: 0
Artifacts
- public/logs/live_backing.log
- public/logs/live.log
- public/results/checkrun.md
WPT Command: python3 ./wpt run --channel=nightly --verify --verify-no-chaos-mode --verify-repeat-loop=0 --verify-repeat-restart=10 --github-checks-text-file=/home/test/artifacts/checkrun.md --affected base_head --log-mach-level=info --log-mach=- -y --no-pause --no-restart-on-unexpected --install-fonts --verify-log-full --no-headless --binary=/home/test/build/firefox/firefox firefox
[taskcluster 2026-02-26 01:45:50.072Z] Task ID: SzdtvACiSz-EdEW74rwySQ
[taskcluster 2026-02-26 01:45:50.072Z] Worker ID: 893460785277313710
[taskcluster 2026-02-26 01:45:50.072Z] Worker Group: us-east1-c
[taskcluster 2026-02-26 01:45:50.072Z] Worker Node Type: projects/757942385826/machineTypes/n2-standard-4
[taskcluster 2026-02-26 01:45:50.072Z] Worker Pool: proj-wpt/ci
[taskcluster 2026-02-26 01:45:50.072Z] Worker Version: 46.1.0
[taskcluster 2026-02-26 01:45:50.072Z] Public IP: 34.23.173.195
[taskcluster 2026-02-26 01:45:50.072Z] Hostname: proj-wpt-ci-thx3g4wyrqyq4ybr4vu96g
[taskcluster 2026-02-26 01:45:51.100Z] === 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
...(975 lines hidden)...
0:51.50 pid:4088 list@resource://services-settings/Database.sys.mjs:96:13
0:51.67 pid:4088 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 1262" data: no]
0:51.76 TEST_START: /css/CSS2/abspos/static-inside-inline-001.html
0:51.83 pid:4088 1772070504283 Marionette INFO Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-001.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
0:52.09 pid:4088 1772070504537 Marionette INFO No differences allowed
0:52.09 TEST_END: PASS
0:52.09 TEST_START: /css/CSS2/abspos/static-inside-inline-002.html
0:52.09 pid:4088 1772070504541 Marionette INFO Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-002.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
0:52.16 pid:4088 1772070504616 Marionette INFO No differences allowed
0:52.17 TEST_END: PASS
0:52.17 TEST_START: /css/CSS2/abspos/static-inside-inline-003.html
0:52.17 pid:4088 1772070504619 Marionette INFO Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
0:52.23 pid:4088 1772070504685 Marionette INFO No differences allowed
0:52.25 TEST_END: FAIL, expected PASS
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
0:52.25 INFO No more tests
0:52.28 pid:4088 1772070504728 Marionette INFO Stopped listening on port 57949
0:52.87 INFO Browser exited with return code -15
0:52.75 INFO Closing logging queue
0:52.75 INFO queue closed
0:52.87 SUITE_END
web-platform-test
~~~~~~~~~~~~~~~~~
Ran 27 checks (27 tests)
Expected results: 18
Unexpected results: 9
test: 9 (9 fail)
Unexpected Results
------------------
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
0:52.87 INFO Got 9 unexpected results, with 0 unexpected passes
0:52.87 INFO Repetition 10 / 10
0:52.87 SUITE_START: web-platform-test - running 3 tests
0:52.87 INFO Using 1 child processes
0:52.88 INFO Setting up ssl
0:52.90 certutil b''
0:52.92 certutil b''
0:52.92 certutil b'\nCertificate Nickname Trust Attributes\n SSL,S/MIME,JAR/XPI\n\nweb-platform-tests CT,, \n'
0:52.93 INFO Application command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank -profile /tmp/tmpap9i4k5u
0:52.94 INFO Starting runner
0:52.94 pid:4465 Full command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank
pid:4465 [4465] Sandbox: CanCreateUserNamespace() clone() failure: EPERM
0:53.44 pid:4465 1772070505892 Marionette INFO Marionette enabled
0:53.54 pid:4465 1772070505995 Marionette INFO Listening on port 40463
0:53.55 pid:4465 [Parent 4465, Main Thread] WARNING: Failed to create DBus proxy for org.a11y.Bus: Could not connect: Connection refused
0:53.55 pid:4465 : 'glib warning', file /builds/worker/checkouts/gecko/toolkit/xre/nsSigHandlers.cpp:201
0:53.55 pid:4465 ** (firefox-nightly:4465): WARNING **: 01:48:26.002: Failed to create DBus proxy for org.a11y.Bus: Could not connect: Connection refused
0:54.47 pid:4465 console.error: services.settings:
0:54.47 pid:4465 Message: EmptyDatabaseError: "main/nimbus-desktop-experiments" has not been synced yet
0:54.47 pid:4465 Stack:
0:54.47 pid:4465 EmptyDatabaseError@resource://services-settings/Database.sys.mjs:19:5
0:54.48 pid:4465 list@resource://services-settings/Database.sys.mjs:96:13
0:54.64 pid:4465 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 1262" data: no]
0:54.73 TEST_START: /css/CSS2/abspos/static-inside-inline-001.html
0:54.78 pid:4465 1772070507232 Marionette INFO Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-001.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
0:55.04 pid:4465 1772070507495 Marionette INFO No differences allowed
0:55.04 TEST_END: PASS
0:55.04 TEST_START: /css/CSS2/abspos/static-inside-inline-002.html
0:55.05 pid:4465 1772070507498 Marionette INFO Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-002.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
0:55.11 pid:4465 1772070507563 Marionette INFO No differences allowed
0:55.11 TEST_END: PASS
0:55.11 TEST_START: /css/CSS2/abspos/static-inside-inline-003.html
0:55.11 pid:4465 1772070507565 Marionette INFO Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
0:55.18 pid:4465 1772070507631 Marionette INFO No differences allowed
0:55.20 TEST_END: FAIL, expected PASS
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
0:55.20 INFO No more tests
0:55.22 pid:4465 1772070507672 Marionette INFO Stopped listening on port 40463
0:55.81 INFO Browser exited with return code -15
0:55.69 INFO Closing logging queue
0:55.69 INFO queue closed
0:55.81 SUITE_END
web-platform-test
~~~~~~~~~~~~~~~~~
Ran 30 checks (30 tests)
Expected results: 20
Unexpected results: 10
test: 10 (10 fail)
Unexpected Results
------------------
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
FAIL /css/CSS2/abspos/static-inside-inline-003.html - Testing http://web-platform.test:8000/css/CSS2/abspos/static-inside-inline-003.html == http://web-platform.test:8000/css/reference/ref-filled-green-100px-square.xht
Found 20000 pixels different, maximum difference per channel 255
0:55.81 INFO Got 10 unexpected results, with 0 unexpected passes
0:55.82 wptserve INFO Stopped http server on 127.0.0.1:8001
0:55.82 wptserve INFO Stopped http server on 127.0.0.1:8000
0:55.82 wptserve INFO Stopped http server on 127.0.0.1:8002
0:55.82 wptserve INFO Stopped http server on 127.0.0.1:8003
0:55.82 wptserve INFO Stopped http server on 127.0.0.1:8443
0:55.83 wptserve INFO Stopped http server on 127.0.0.1:8445
0:55.83 wptserve INFO Stopped http server on 127.0.0.1:8446
0:55.83 wptserve INFO Stopped http server on 127.0.0.1:8444
0:55.83 wptserve INFO Stopped http server on 127.0.0.1:9000
0:55.83 wptserve INFO Stopped WebTransport over HTTP/3 server on 127.0.0.1:11000
0:55.89 wptserve INFO Close on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
0:55.89 wptserve INFO Close on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
0:55.96 INFO Removed font: Ahem.ttf
0:55.98 INFO Closing logging queue
0:55.98 INFO queue closed
0:55.99 INFO ::: Ran 10 of expected 10 iterations.
0:55.99 INFO ## All results ##
0:55.99 INFO ### /css/CSS2/abspos/static-inside-inline-001.html ###
0:55.99 INFO | Subtest | Results | Messages |
0:55.99 INFO |---------|---------|----------|
0:55.99 INFO | | PASS | |
0:55.99 INFO
0:55.99 INFO ### /css/CSS2/abspos/static-inside-inline-002.html ###
0:55.99 INFO | Subtest | Results | Messages |
0:55.99 INFO |---------|---------|----------|
0:55.99 INFO | | PASS | |
0:55.99 INFO
0:55.99 INFO ### /css/CSS2/abspos/static-inside-inline-003.html ###
0:55.99 INFO | Subtest | Results | Messages |
0:55.99 INFO |---------|---------|----------|
0:55.99 INFO | | FAIL | |
0:55.99 INFO
0:55.99 INFO ::: Running tests in a loop with restarts 10 times : PASS
0:55.99 INFO :::
0:55.99 INFO ::: Test verification PASS
0:55.99 INFO :::
[taskcluster 2026-02-26 01:48:30.098Z] === Task Finished ===
[taskcluster 2026-02-26 01:48:30.681Z] Successful task run with exit code: 0 completed in 160.61 seconds
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