Bug 275963 – REGRESSION (262629@main): [ x86_64/arm64 difference ] 3 svg tests are constantly failing.

• Status: RESOLVED
• Resolution: FIXED
• Component: Compositing

[Ben Schwartz]

svg/W3C-SVG-1.1/metadata-example-01-b.svg

This test is constantly failing on macOS arm64, and iOS simulator running on x86_64 machines.

HISTORY:

https://results.webkit.org/?suite=layout-tests&test=svg%2FW3C-SVG-1.1%2Fmetadata-example-01-b.svg&recent=false&version_name=iOS%2017&version_name=Ventura

TEXT DIFF:

I'm not going to post the SVG monstrosity here, but the important part is:
-0.47
+0.470001

That text diff is from macOS arm64. iOS expects the opposite. I assume this is due to differing baselines, but I haven't checked.

DIFF URL:

https://build.webkit.org/results/Apple-Ventura-Release-AppleSilicon-WK1-Tests/280415@main%20(10103)/svg/W3C-SVG-1.1/metadata-example-01-b-pretty-diff.html

REPRODUCIBILITY:

I was able to reproduce this issue on macOS Sonoma (14.4, 23E214/arm64) ToT using the following command:

run-webkit-tests -v svg/W3C-SVG-1.1/metadata-example-01-b.svg

REGRESSION:

Contextual information indicates this issue started appearing on macOS when we enabled UI-side compositing by default in 262629@main. I'm not sure what the iOS regression point is, as we aren't using x86_64 to run simulator tests.

[Radar WebKit Bug Importer]

<rdar://problem/130690749>

[Ben Schwartz]

For posterity: discussed offline with Simon, who said to re-baseline to make arm64 pass and mark as failure on x86_64.

[Ben Schwartz]

Pull request: https://github.com/WebKit/WebKit/pull/30241

[EWS]

Test gardening commit 280424@main (c90807b9c23c): <https://commits.webkit.org/280424@main>

Reviewed commits have been landed. Closing PR #30241 and removing active labels.

[Ben Schwartz]

There's another test exhibiting similar behavior. I'm going to do the same for that test.

Test is: svg/custom/use-on-symbol-inside-pattern.svg

[Ben Schwartz]

And another: imported/w3c/web-platform-tests/svg/import/metadata-example-01-t-manual.svg

[Ben Schwartz]

*** Bug 260870 has been marked as a duplicate of this bug. ***

[EWS]

Test gardening commit 280432@main (b5625d33cc19): <https://commits.webkit.org/280432@main>

Reviewed commits have been landed. Closing PR #30244 and removing active labels.

[EWS]

Committed 281018@main (03e53c8b18c1): <https://commits.webkit.org/281018@main>

Reviewed commits have been landed. Closing PR #30884 and removing active labels.

[Anfernee Viduya]

The first re-base effort did not fully resolve issue. With the above commit, should resolve other issues.

[Robert Jenner]

*** Bug 279448 has been marked as a duplicate of this bug. ***