[Webkit-unassigned] [Bug 260529] New: REGRESSION(256951 at main): [Ventura x86_64] animations/suspend-resume-animation-events.html is a flaky text failure.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=260529

            Bug ID: 260529
           Summary: REGRESSION(256951 at main): [Ventura x86_64]
                    animations/suspend-resume-animation-events.html is a
                    flaky text failure.
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Animations
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ben_schwartz at apple.com
                CC: dino at apple.com, graouts at apple.com,
                    webkit-bot-watchers-bugzilla at group.apple.com,
                    webkit-bug-importer at group.apple.com

animations/suspend-resume-animation-events.html

This test is a flaky text failure on macOS Ventura builds on x86_64 machines.

HISTORY:

https://results.webkit.org/?suite=layout-tests&test=animations%2Fsuspend-resume-animation-events.html&recent=false&platform=mac&version_name=Ventura&architecture=x86_64

TEXT DIFF:

 Log

 start animation move
-iteration animation move
 end animation move

DIFF URL:

https://build.webkit.org/results/Apple-Ventura-Release-WK1-Tests/266464@main%20(3514)/animations/suspend-resume-animation-events-pretty-diff.html

REPRODUCIBILITY:

I was able to reproduce this bug on macOS Ventura 13.5 (22G74) ToT on an x86_64 machine using the following command:

run-webkit-tests --clobber-old-results --debug --verbose --iterations 100 --child-processes 10 -f --exit-after-n-failures 1 animations/suspend-resume-animation-events.html

REGRESSION:

I was able to bisect a regression point using the flakiness dashboard. This test reproduced at 256951 at main, but it did not reproduce at 256950 at main. Changes at 256951 at main appear to be directly related to this error, and is likely what caused the failure.

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