Bug 239794 – [ macOS ] webanimations/accelerated-animation-after-forward-filling-animation.html is a flaky image failure

• Status: REOPENED
• Component: New Bugs

[Karl Rackler]

Description:
webanimations/accelerated-animation-after-forward-filling-animation.html

The first failure that I saw on the dashboard for Big Sur was 2/16/2022 at r289890, which had to do with modifying ContainerQueryEvaluator but it is unclear if this is causing the issue.  The first failure that I saw on the the dashboard for Monterey was 3/17/2022 at r291447.  They have remained flaky image failures throughout history on the dashboard. 

REPRODUCTION STEPS
I can reproduce this on ToT ( r293441 ).

Command: 
run-webkit-tests --root 293441 --exit-after-n-failures 1 --exit-after-n-crashes-or-timeouts 1 --pixel-tests --tolerance 5 --iterations 2000 -f --no-retry

Result: 
Unexpected flakiness: image-only failures (1)
  webanimations/accelerated-animation-after-forward-filling-animation.html [ ImageOnlyFailure Pass ]

History:
https://results.webkit.org/?suite=layout-tests&test=webanimations%2Faccelerated-web-animation-with-single-interval-and-easing-y-axis-above-1.html&platform=mac&limit=50000

Image Diff:
https://build.webkit.org/results/Apple-Monterey-Debug-WK2-Tests/249998@main%20(986)/webanimations/accelerated-animation-after-forward-filling-animation-diffs.html

[Radar WebKit Bug Importer]

<rdar://problem/92365628>

[Karl Rackler]

I have marked this test as a flaky image failure while this issue is investigated.

[Karl Rackler]

Pull request: https://github.com/WebKit/WebKit/pull/406

[EWS]

Test gardening commit r293487 (250021@main): <https://commits.webkit.org/250021@main>

Reviewed commits have been landed. Closing PR #406 and removing active labels.

[Antoine Quint]

Pull request: https://github.com/WebKit/WebKit/pull/1469

[EWS]

Committed r295495 (251500@main): <https://commits.webkit.org/251500@main>

Reviewed commits have been landed. Closing PR #1469 and removing active labels.

[Karl Rackler]

Reopen for a fix.  After landing 251500@main we continue to get flaky image failures.