[Webkit-unassigned] [Bug 260867] New: REGRESSION(267279 at main): [ macOS wk2 ] fast/canvas/webgl/texImage2D-mse-flipY-false.html is a consistent text failure.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=260867

            Bug ID: 260867
           Summary: REGRESSION(267279 at main): [ macOS wk2 ]
                    fast/canvas/webgl/texImage2D-mse-flipY-false.html is a
                    consistent text failure.
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebGL
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ben_schwartz at apple.com
                CC: dino at apple.com, jean-yves.avenard at apple.com,
                    kbr at google.com, kkinnunen at apple.com,
                    webkit-bot-watchers-bugzilla at group.apple.com,
                    webkit-bug-importer at group.apple.com

fast/canvas/webgl/texImage2D-mse-flipY-false.html

This test is a consistent text failure on macOS wk2 (including gpuprocess).

HISTORY:

https://results.webkit.org/?suite=layout-tests&test=fast%2Fcanvas%2Fwebgl%2FtexImage2D-mse-flipY-false.html&platform=mac&flavor=wk2&flavor=gpuprocess

TEXT DIFF:

 Setting video src.
 Video can play.
 Checking the canvas pixels.
-PASS: Bottom edge is red.
-PASS: Top edge is blue.
+FAIL: Bottom edge is not red.
+FAIL: Top edge is not blue.

DIFF URL:

https://build.webkit.org/results/Apple-Ventura-Release-AppleSilicon-WK2-Tests/267407%40main%20(4683)/fast/canvas/webgl/texImage2D-mse-flipY-false-pretty-diff.html

REPRODUCTION:

I was able to reproduce this bug on macOS Ventura (13.5, 22G74/arm64) using the following command:

run-webkit-tests --verbose --iterations 50 --clobber-old-results --exit-after-n-failures 1 fast/canvas/webgl/texImage2D-mse-flipY-false.html

REGRESSION:

I was able to bisect a regression point. This bug reproduced at 267279 at main, but it did not reproduce at 267278 at main. Changes at 267279 at main appear to be directly related to this error, and is likely what caused the failure.

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