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Fix :active state persistence when flex order changes during mousedown #59117

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Community-TC Integration / wpt-firefox-nightly-stability succeeded Apr 11, 2026 in 6m 40s

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: 2026-04-11T15:02:06.334Z
Resolved: 2026-04-11T15:07:47.344Z
Task Execution Time: 5 minutes, 41 seconds, 10 milliseconds
Task Status: completed
Reason Resolved: completed
TaskId: cawqI0nkSJCJxhMOthklRw
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 2026-04-11 15:02:06.613Z] Task ID: cawqI0nkSJCJxhMOthklRw
[taskcluster 2026-04-11 15:02:06.613Z] Worker ID: 367644320237870298
[taskcluster 2026-04-11 15:02:06.613Z] Worker Group: us-central1-f
[taskcluster 2026-04-11 15:02:06.613Z] Worker Node Type: projects/757942385826/machineTypes/n2-standard-4
[taskcluster 2026-04-11 15:02:06.613Z] Worker Pool: proj-wpt/ci
[taskcluster 2026-04-11 15:02:06.613Z] Worker Version: 46.1.0
[taskcluster 2026-04-11 15:02:06.613Z] Public IP: 104.198.22.88
[taskcluster 2026-04-11 15:02:06.613Z] Hostname: proj-wpt-ci-tqn-cdmhq2qyhyehncgb5g

ac811f28856d - Started downloading
ac811f28856d - Downloaded in 0.031 seconds
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...(1182 lines hidden)...

  subtest: 18 (18 fail)

Error Summary
-------------
/css/selectors/active-flex-order-persistence.html
  FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
  FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
  FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
  FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
  FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
  FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
  FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
  FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
  FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
  FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
  FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
  FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
  FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
  FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
  FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
  FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
  FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
  FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
 1:16.06 INFO Got 9 unexpected results, with 0 unexpected passes
 1:16.06 INFO Repetition 10 / 10
 1:16.06 SUITE_START: web-platform-test - running 1 tests
 1:16.06 INFO Using 1 child processes
 1:16.07 INFO Setting up ssl
 1:16.10 certutil b''
 1:16.12 certutil b''
 1:16.13 certutil b'\nCertificate Nickname                                         Trust Attributes\n                                                             SSL,S/MIME,JAR/XPI\n\nweb-platform-tests                                           CT,, \n'
 1:16.13 INFO Application command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank -profile /tmp/tmpot90vtev
 1:16.14 INFO Starting runner
 1:16.14 pid:4407 Full command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank
pid:4407 [4407] Sandbox: CanCreateUserNamespace() clone() failure: EPERM
 1:16.70 pid:4407 1775920059996	Marionette	INFO	Marionette enabled
 1:16.83 pid:4407 1775920060125	Marionette	INFO	Listening on port 56611
 1:16.84 pid:4407 [Parent 4407, Main Thread] WARNING: Failed to create DBus proxy for org.a11y.Bus: Could not connect: Connection refused
 1:16.84 pid:4407 : 'glib warning', file /builds/worker/checkouts/gecko/toolkit/xre/nsSigHandlers.cpp:201
 1:16.84 pid:4407 ** (firefox-nightly:4407): WARNING **: 15:07:40.134: Failed to create DBus proxy for org.a11y.Bus: Could not connect: Connection refused
 1:18.06 pid:4407 console.error: services.settings:
 1:18.06 pid:4407   Message: EmptyDatabaseError: "main/nimbus-desktop-experiments" has not been synced yet
 1:18.06 pid:4407   Stack:
 1:18.06 pid:4407     EmptyDatabaseError@resource://services-settings/Database.sys.mjs:19:5
 1:18.06 pid:4407 list@resource://services-settings/Database.sys.mjs:96:13
 1:18.27 pid:4407 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 1229"  data: no]
 1:18.72 TEST_START: /css/selectors/active-flex-order-persistence.html
 1:19.25 INFO {'actions': [{'type': 'none', 'actions': [{'type': 'pause', 'duration': 16}, {'type': 'pause', 'duration': 16}, {'type': 'pause', 'duration': 16}], 'id': '0'}, {'type': 'pointer', 'actions': [{'type': 'pointerMove', 'x': 5, 'y': 5, 'origin': {'element-6066-11e4-a52e-4f735466cecf': '2986df0f-c6a4-4957-99b6-d5f9054c3a3d'}}, {'type': 'pointerDown', 'button': 0}, {'type': 'pointerUp', 'button': 0}], 'parameters': {'pointerType': 'mouse'}, 'id': '1'}]}
 1:19.34 INFO {'actions': [{'type': 'none', 'actions': [{'type': 'pause', 'duration': 16}, {'type': 'pause', 'duration': 16}], 'id': '2'}, {'type': 'pointer', 'actions': [{'type': 'pointerMove', 'x': 5, 'y': 5, 'origin': {'element-6066-11e4-a52e-4f735466cecf': '2986df0f-c6a4-4957-99b6-d5f9054c3a3d'}}, {'type': 'pointerDown', 'button': 0}], 'parameters': {'pointerType': 'mouse'}, 'id': '3'}]}
 1:19.39 INFO {'actions': [{'type': 'none', 'actions': [{'type': 'pause', 'duration': 16}], 'id': '4'}, {'type': 'pointer', 'actions': [{'type': 'pointerMove', 'x': 50, 'y': 50, 'origin': 'viewport'}], 'parameters': {'pointerType': 'mouse'}, 'id': '5'}]}
 1:19.43 INFO {'actions': [{'type': 'none', 'actions': [{'type': 'pause', 'duration': 16}], 'id': '6'}, {'type': 'pointer', 'actions': [{'type': 'pointerUp', 'button': 0}], 'parameters': {'pointerType': 'mouse'}, 'id': '7'}]}
 1:19.45 TEST_END: Test OK. Subtests passed 0/2. Unexpected 2
FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16

 1:19.46 INFO No more tests
 1:19.46 pid:4407 1775920062755	Marionette	INFO	Stopped listening on port 56611
 1:19.97 INFO Browser exited with return code -15
 1:19.81 INFO Closing logging queue
 1:19.81 INFO queue closed
 1:19.98 SUITE_END

web-platform-test
~~~~~~~~~~~~~~~~~
Ran 30 checks (20 subtests, 10 tests)
Expected results: 10
Unexpected results: 20
  subtest: 20 (20 fail)

Error Summary
-------------
/css/selectors/active-flex-order-persistence.html
  FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
  FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
  FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
  FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
  FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
  FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
  FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
  FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
  FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
  FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
  FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
  FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
  FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
  FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
  FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
  FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
  FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
  FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
  FAIL :active is set when element is clicked - assert_true: :active should be set on mousedown expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:56:16
  FAIL :active state persists through mousemove during drag - assert_true: :active should persist through drag expected true got false
@http://web-platform.test:8000/css/selectors/active-flex-order-persistence.html:79:16
 1:19.98 INFO Got 10 unexpected results, with 0 unexpected passes
 1:19.98 wptserve INFO Stopped http server on 127.0.0.1:8000
 1:19.98 wptserve INFO Stopped http server on 127.0.0.1:8001
 1:19.99 wptserve INFO Stopped http server on 127.0.0.1:8003
 1:19.99 wptserve INFO Stopped http server on 127.0.0.1:8002
 1:19.99 wptserve INFO Stopped http server on 127.0.0.1:8443
 1:19.99 wptserve INFO Stopped http server on 127.0.0.1:8446
 1:19.99 wptserve INFO Stopped http server on 127.0.0.1:8444
 1:20.00 wptserve INFO Stopped http server on 127.0.0.1:8445
 1:20.00 wptserve INFO Stopped http server on 127.0.0.1:9000
 1:20.00 wptserve INFO Stopped WebTransport over HTTP/3 server on 127.0.0.1:11000
 1:20.31 wptserve INFO Close on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 1:20.31 wptserve INFO Close on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 1:20.37 INFO Removed font: Ahem.ttf
 1:20.40 INFO Closing logging queue
 1:20.40 INFO queue closed
 1:20.41 INFO ::: Ran 10 of expected 10 iterations.
 1:20.41 INFO ## All results ##

 1:20.41 INFO ### /css/selectors/active-flex-order-persistence.html ###
 1:20.41 INFO |                        Subtest                         | Results |                                  Messages                                  |
 1:20.41 INFO |--------------------------------------------------------|---------|----------------------------------------------------------------------------|
 1:20.41 INFO |                                                        | OK      |                                                                            |
 1:20.41 INFO | `:active is set when element is clicked`               | FAIL    | `assert_true: :active should be set on mousedown expected true got false`  |
 1:20.41 INFO | `:active state persists through mousemove during drag` | FAIL    | `assert_true: :active should persist through drag expected true got false` |
 1:20.41 INFO 
 1:20.41 INFO ::: Running tests in a loop with restarts 10 times : PASS
 1:20.41 INFO :::
 1:20.41 INFO ::: Test verification PASS
 1:20.41 INFO :::
[taskcluster 2026-04-11 15:07:46.068Z] === Task Finished ===
[taskcluster 2026-04-11 15:07:46.492Z] Successful task run with exit code: 0 completed in 339.882 seconds
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