Bug 216164

Description:
html5lib/generated/run-template-data.html

The first crash that I see this on the dashboard was 03/31/20 at r259295, but does not appear to be relevant to have caused this.
History:
https://results.webkit.org/?suite=layout-tests&test=html5lib%2Fgenerated%2Frun-template-data.html&limit=50000&style=debug&version_name=Catalina

Crash Log:
Application Specific Information:
CRASHING TEST: html5lib/generated/run-template-data.html

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   com.apple.JavaScriptCore      	0x000000074023dd1e WTFCrash + 14 (Assertions.cpp:295)
1   com.apple.WebCore             	0x00000007210470bb WTFCrashWithInfo(int, char const*, char const*, int) + 27
2   com.apple.WebCore             	0x000000072581a19b WebCore::RenderView::paint(WebCore::PaintInfo&, WebCore::LayoutPoint const&) + 123 (RenderView.cpp:306)
3   com.apple.WebCore             	0x00000007256c31d8 WebCore::RenderLayer::paintBackgroundForFragments(WTF::Vector<WebCore::LayerFragment, 1ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> const&, WebCore::GraphicsContext&, WebCore::GraphicsContext&, WebCore::LayoutRect const&, bool, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::PaintBehavior>, WebCore::RenderObject*) + 648 (RenderLayer.cpp:5058)
4   com.apple.WebCore             	0x00000007256bf36f WebCore::RenderLayer::paintLayerContents(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) + 2607 (RenderLayer.cpp:4705)
5   com.apple.WebCore             	0x00000007256e2e9d WebCore::RenderLayerBacking::paintIntoLayer(WebCore::GraphicsLayer const*, WebCore::GraphicsContext&, WebCore::IntRect const&, WTF::OptionSet<WebCore::PaintBehavior>, WebCore::EventRegionContext*)::$_21::operator()(WebCore::RenderLayer&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) const + 397 (RenderLayerBacking.cpp:3027)
6   com.apple.WebCore             	0x00000007256e27b5 WebCore::RenderLayerBacking::paintIntoLayer(WebCore::GraphicsLayer const*, WebCore::GraphicsContext&, WebCore::IntRect const&, WTF::OptionSet<WebCore::PaintBehavior>, WebCore::EventRegionContext*) + 533 (RenderLayerBacking.cpp:3042)
7   com.apple.WebCore             	0x00000007256e37b1 WebCore::RenderLayerBacking::paintContents(WebCore::GraphicsLayer const*, WebCore::GraphicsContext&, WebCore::FloatRect const&, unsigned int) + 753 (RenderLayerBacking.cpp:3308)
8   com.apple.WebCore             	0x00000007250b1a90 WebCore::GraphicsLayer::paintGraphicsLayerContents(WebCore::GraphicsContext&, WebCore::FloatRect const&, unsigned int) + 224 (GraphicsLayer.cpp:518)
9   com.apple.WebCore             	0x0000000725140575 WebCore::GraphicsLayerCA::platformCALayerPaintContents(WebCore::PlatformCALayer*, WebCore::GraphicsContext&, WebCore::FloatRect const&, unsigned int) + 517 (GraphicsLayerCA.cpp:1692)
10  com.apple.WebCore             	0x0000000722bff94f WebCore::PlatformCALayer::drawLayerContents(WebCore::GraphicsContext&, WebCore::PlatformCALayer*, WTF::Vector<WebCore::FloatRect, 5ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc>&, unsigned int) + 991 (PlatformCALayerCocoa.mm:1202)
11  com.apple.WebCore             	0x000000072518b230 WebCore::TileGrid::platformCALayerPaintContents(WebCore::PlatformCALayer*, WebCore::GraphicsContext&, WebCore::FloatRect const&, unsigned int) + 320 (TileGrid.cpp:734)