[Webkit-unassigned] [Bug 138551] Border-radius does not clip a composited descendant

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=138551

--- Comment #30 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
Also, when I make Mac take the clipping mask code path, it asserts:
* thread #1: tid = 0xde2f, 0x000000010370ecca JavaScriptCore`WTFCrash + 42 at Assertions.cpp:321, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0xbbadbeef)
    frame #0: 0x000000010370ecca JavaScriptCore`WTFCrash + 42 at Assertions.cpp:321
  * frame #1: 0x00000001065109d3 WebCore`WebCore::RenderLayerBacking::paintIntoLayer(this=0x0000000117ee1d20, graphicsLayer=0x0000000117748720, context=0x00007fff5fbfb078, paintDirtyRect=0x00007fff5fbfada0, paintBehavior=0, paintingPhase=32) + 131 at RenderLayerBacking.cpp:2178
    frame #2: 0x0000000106511001 WebCore`WebCore::RenderLayerBacking::paintContents(this=0x0000000117ee1d20, graphicsLayer=0x0000000117748720, context=0x00007fff5fbfb078, paintingPhase=32, clip=0x00007fff5fbfaec8) + 769 at RenderLayerBacking.cpp:2264
    frame #3: 0x000000010568f5db WebCore`WebCore::GraphicsLayer::paintGraphicsLayerContents(this=0x0000000117748720, context=0x00007fff5fbfb078, clip=0x00007fff5fbfb170) + 171 at GraphicsLayer.cpp:351
    frame #4: 0x000000010569f5ac WebCore`WebCore::GraphicsLayerCA::platformCALayerPaintContents(this=0x0000000117748720, (null)=0x0000000117ee2eb0, context=0x00007fff5fbfb078, clip=0x00007fff5fbfb170) + 44 at GraphicsLayerCA.cpp:1257
    frame #5: 0x000000010569f5ff WebCore`non-virtual thunk to WebCore::GraphicsLayerCA::platformCALayerPaintContents(this=0x0000000117748978, (null)=0x0000000117ee2eb0, context=0x00007fff5fbfb078, clip=0x00007fff5fbfb170) + 63 at GraphicsLayerCA.cpp:1258

This patch has too many problems. I'm going to roll it out.

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