Open Bug 1973098 Opened 2 days ago Updated 1 day ago

Intermittent /intersection-observer/scroll-and-root-margin.html | single tracking bug

Categories

(Core :: Layout, defect, P5)

Product:
Core
Component:
Layout
Type:
defect

Tracking

()

People

(Reporter: intermittent-bug-filer, Unassigned)

Details

(Keywords: intermittent-failure, intermittent-testcase)

Filed by: csabou [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer?job_id=513914914&repo=autoland
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/afLdxX_MQGq80pAAO-2tew/runs/0/artifacts/public/logs/live_backing.log

[task 2025-06-19T17:17:52.567+00:00] 17:17:52     INFO - TEST-OK | /intersection-observer/same-origin-grand-child-iframe.sub.html | took 2561ms
[task 2025-06-19T17:17:52.567+00:00] 17:17:52     INFO - TEST-START | /intersection-observer/scroll-and-root-margin.html
[task 2025-06-19T17:17:52.631+00:00] 17:17:52     INFO - Closing window 46c475d0-3415-4111-a11f-2561a0ea10dd
[task 2025-06-19T17:17:52.951+00:00] 17:17:52     INFO - PID 33914 | -----------------------------------------------------
[task 2025-06-19T17:17:52.951+00:00] 17:17:52     INFO - PID 33914 | Suppressions used:
[task 2025-06-19T17:17:52.951+00:00] 17:17:52     INFO - PID 33914 |   count      bytes template
[task 2025-06-19T17:17:52.951+00:00] 17:17:52     INFO - PID 33914 |      31      16288 nsComponentManagerImpl
[task 2025-06-19T17:17:52.951+00:00] 17:17:52     INFO - PID 33914 |       2        288 libfontconfig.so
[task 2025-06-19T17:17:52.951+00:00] 17:17:52     INFO - PID 33914 |       1       9496 style::sharing::SHARING_CACHE_KEY
[task 2025-06-19T17:17:52.951+00:00] 17:17:52     INFO - PID 33914 |       1       4104 style::bloom::BLOOM_KEY
[task 2025-06-19T17:17:52.951+00:00] 17:17:52     INFO - PID 33914 | -----------------------------------------------------
[task 2025-06-19T17:17:53.774+00:00] 17:17:53     INFO - PID 33914 | -----------------------------------------------------
[task 2025-06-19T17:17:53.774+00:00] 17:17:53     INFO - PID 33914 | Suppressions used:
[task 2025-06-19T17:17:53.774+00:00] 17:17:53     INFO - PID 33914 |   count      bytes template
[task 2025-06-19T17:17:53.775+00:00] 17:17:53     INFO - PID 33914 |       2        288 libfontconfig.so
[task 2025-06-19T17:17:53.775+00:00] 17:17:53     INFO - PID 33914 | -----------------------------------------------------
[task 2025-06-19T17:17:54.080+00:00] 17:17:54     INFO - PID 33914 | -----------------------------------------------------
[task 2025-06-19T17:17:54.084+00:00] 17:17:54     INFO - PID 33914 | Suppressions used:
[task 2025-06-19T17:17:54.084+00:00] 17:17:54     INFO - PID 33914 |   count      bytes template
[task 2025-06-19T17:17:54.084+00:00] 17:17:54     INFO - PID 33914 |      31      16288 nsComponentManagerImpl
[task 2025-06-19T17:17:54.084+00:00] 17:17:54     INFO - PID 33914 |       2        288 libfontconfig.so
[task 2025-06-19T17:17:54.084+00:00] 17:17:54     INFO - PID 33914 |       1       9496 style::sharing::SHARING_CACHE_KEY
[task 2025-06-19T17:17:54.084+00:00] 17:17:54     INFO - PID 33914 |       1       4104 style::bloom::BLOOM_KEY
[task 2025-06-19T17:17:54.085+00:00] 17:17:54     INFO - PID 33914 | -----------------------------------------------------
[task 2025-06-19T17:17:54.103+00:00] 17:17:54     INFO - 
[task 2025-06-19T17:17:54.103+00:00] 17:17:54     INFO - TEST-UNEXPECTED-FAIL | /intersection-observer/scroll-and-root-margin.html | Test scroll margin intersection - assert_equals: IntersectionObserverEntryCount expected 1 but got 0
[task 2025-06-19T17:17:54.103+00:00] 17:17:54     INFO - testIntersection@http://web-platform.test:8000/intersection-observer/scroll-and-root-margin.html:33:16
[task 2025-06-19T17:17:54.103+00:00] 17:17:54     INFO - Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2684:25
[task 2025-06-19T17:17:54.104+00:00] 17:17:54     INFO - Test.prototype.step_func_done/<@http://web-platform.test:8000/resources/testharness.js:2759:32
[task 2025-06-19T17:17:54.104+00:00] 17:17:54     INFO - callback@http://web-platform.test:8000/intersection-observer/resources/intersection-observer-test-utils.js:80:13
[task 2025-06-19T17:17:54.104+00:00] 17:17:54     INFO - Test.prototype.step_timeout/<@http://web-platform.test:8000/resources/testharness.js:2805:25
[task 2025-06-19T17:17:54.104+00:00] 17:17:54     INFO - Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2684:25
[task 2025-06-19T17:17:54.105+00:00] 17:17:54     INFO - Test.prototype.step_func/<@http://web-platform.test:8000/resources/testharness.js:2731:35
[task 2025-06-19T17:17:54.105+00:00] 17:17:54     INFO - TEST-OK | /intersection-observer/scroll-and-root-margin.html | took 1536ms

This passed when run in confirm failure mode (rerun the test 4x in the same session).

This indicates that the test is probably a lower frequency intermittent and harder to reproduce/debug.

Whiteboard: [collect_confirm_failure]
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