[Webkit-unassigned] [Bug 230636] border-radius clipping stops working when using mix-blend-mode with composted children

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=230636

--- Comment #2 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
This happens because isolatesCompositedBlending() changes the behavior of composited clipping from using a single clipping layer for descendants (which knows how to do border-radius clipping) to using an "ancestor clip layer" on each descendant, which does not. See RenderLayerCompositor::clipsCompositingDescendants().

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