[Webkit-unassigned] [Bug 259699] New: REGRESSION(262173 at main): [ macOS WK2 ] media/media-source/media-source-duplicate-seeked.html is a flaky failure

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=259699

            Bug ID: 259699
           Summary: REGRESSION(262173 at main): [ macOS WK2 ]
                    media/media-source/media-source-duplicate-seeked.html
                    is a flaky failure
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ben_schwartz at apple.com
                CC: eric.carlson at apple.com, jean-yves.avenard at apple.com,
                    webkit-bot-watchers-bugzilla at group.apple.com,
                    webkit-bug-importer at group.apple.com, youennf at gmail.com

media/media-source/media-source-duplicate-seeked.html

This test is a flaky failure on macOS WK2 (including gpuprocess).

HISTORY:

https://results.webkit.org/?suite=layout-tests&test=media%2Fmedia-source%2Fmedia-source-duplicate-seeked.html&platform=mac&flavor=wk2&recent=false

TEXT DIFF:

 RUN(video.currentTime = 1)
 EVENT(seeked)
 RUN(video.play())
-EVENT(ended)
+EVENT(seeked) TEST(false) FAIL
 END OF TEST

DIFF URL:

https://build.webkit.org/results/Apple-Ventura-Release-AppleSilicon-WK2-Tests/266464%40main%20(4230)/media/media-source/media-source-duplicate-seeked-pretty-diff.html

REPRODUCIBILITY:

I was able to reproduce this bug on macOS Ventura at ToT running the test as follows:

run-webkit-tests --iterations 100 --child-processes=5 --verbose media/media-source/media-source-duplicate-seeked.html

REGRESSION:

I was able to bisect a regression point using the flakiness dashboard. This test reproduced at 262173 at main, but it did not reproduce at 262172 at main. Changes at 262173 at main appear to be directly related to this error, and is likely what caused the failure.

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