Created attachment 468582 [details] gradient-prefixed-unprefixed-toggle-diff.png fast/css/gradient-prefixed-unprefixed-toggle.html This test was an ImageOnlyFailure [so far] only once at 270640@main on macOS Sonoma (on arm64), wk2 release. HISTORY: https://results.webkit.org/?suite=layout-tests&test=fast%2Fcss%2Fgradient-prefixed-unprefixed-toggle.html&platform=mac IMAGE DIFF: Attached. IMAGES URL: https://build.webkit.org/results/Apple-Sonoma-Release-AppleSilicon-WK2-Tests/270640@main%20(796)/fast/css/gradient-prefixed-unprefixed-toggle-diffs.html REPRODUCIBILITY: I was unable to reproduce this issue on macOS Sonoma (14.1, 23B74/arm64) ToT. NOTE: It appears the output from a previous test run (fast/css/getPropertyValue-returns-empty-on-missing-property.html) remained on the screen, which at least contributed to the failure, if not fully caused it.
<rdar://problem/118347874>
I think we decided this was a repaint issue.
This looks very similar to the underlying cause of https://bugs.webkit.org/show_bug.cgi?id=273212, which was much easier to reproduce. For now, I'm going to dupe. If we get more data in the future, we can revisit this choice. *** This bug has been marked as a duplicate of bug 273212 ***