[Webkit-unassigned] [Bug 265957] New: REGRESSION (271535 at main): [ macOS Release wk2 ] fullscreen/full-screen-layer-dump.html is a consistent failure

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=265957

            Bug ID: 265957
           Summary: REGRESSION (271535 at main): [ macOS Release wk2 ]
                    fullscreen/full-screen-layer-dump.html is a consistent
                    failure
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: darbinyan at apple.com

Description:
fullscreen/full-screen-layer-dump.html is failing consistently on macOS Release wk2 started from 271535 at main.

This issue can be bisected to 271535 at main by using the command: 
run-webkit-tests  --release --iterations=50 fullscreen/full-screen-layer-dump.html

Confirmed:
271535 at main - FAILED 50/50
271534 at main - PASSED 50/50

History:
https://results.webkit.org/?suite=layout-tests&test=fullscreen%2Ffull-screen-layer-dump.html&version_name=Monterey&version_name=Sonoma&version_name=Ventura&flavor=wk2

Diff Log:
Test passes if you see a contents layer 3x the size and with a negative offset equal to the size:

(GraphicsLayer
  (anchor 0.00 0.00)
  (bounds 800.00 600.00)
  (children 1
    (GraphicsLayer
      (bounds 800.00 600.00)
      (contentsOpaque 1)
      (backgroundColor #000000)
      (children 2
        (GraphicsLayer
          (preserves3D 1)
          (children 1
            (GraphicsLayer
              (bounds 800.00 600.00)
              (children 2
                (GraphicsLayer
                  (anchor 0.00 0.00)
                  (bounds 800.00 600.00)
                  (contents layer (background color)
                    (position -800.00 -600.00)
                    (bounds 2400.00 1800.00)
                  )
                )
                (GraphicsLayer
                  (bounds 800.00 600.00)
                )
              )
            )
          )
        )
        (GraphicsLayer
          (preserves3D 1)
          (children 1
            (GraphicsLayer
              (bounds 800.00 600.00)


Link:
https://build.webkit.org/results/Apple-Sonoma-Release-WK2-Tests/271609@main%20(865)/fullscreen/full-screen-layer-dump-pretty-diff.html

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