[Webkit-unassigned] [Bug 234315] New: REGRESSION (r286982): ASSERTION FAILED: clipRectsContext.rootLayer == m_clipRectsCache->m_clipRectsRoot[clipRectsType]

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=234315

            Bug ID: 234315
           Summary: REGRESSION (r286982): ASSERTION FAILED:
                    clipRectsContext.rootLayer ==
                    m_clipRectsCache->m_clipRectsRoot[clipRectsType]
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ryanhaddad at apple.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    webkit-bot-watchers-bugzilla at group.apple.com,
                    webkit-bug-importer at group.apple.com, zalan at apple.com

fast/layers/top-layer-ancestor-opacity-and-transform-crash.html is asserting on iOS and macOS debug bots since https://trac.webkit.org/changeset/286982/webkit, which was a revert of https://trac.webkit.org/changeset/283354/webkit 

ASSERTION FAILED: clipRectsContext.rootLayer == m_clipRectsCache->m_clipRectsRoot[clipRectsType]
./rendering/RenderLayer.cpp(4410) : Ref<WebCore::ClipRects> WebCore::RenderLayer::updateClipRects(const WebCore::RenderLayer::ClipRectsContext &)
1   0x14fa1c950 WTFCrash
2   0x105812230 WebCore::Converter<WebCore::IDLDOMString>::ReturnType WebCore::convert<WebCore::IDLDOMString>(JSC::JSGlobalObject&, JSC::JSValue)
3   0x109b7f31c WebCore::RenderLayer::updateClipRects(WebCore::RenderLayer::ClipRectsContext const&)
4   0x109b7f840 WebCore::RenderLayer::parentClipRects(WebCore::RenderLayer::ClipRectsContext const&) const
5   0x109b75ef4 WebCore::RenderLayer::backgroundClipRect(WebCore::RenderLayer::ClipRectsContext const&) const
6   0x109b75604 WebCore::RenderLayer::paintLayerWithEffects(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>)
7   0x109b74be8 WebCore::RenderLayer::paintLayer(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>)
8   0x109b7a64c WebCore::RenderLayer::paintList(WebCore::RenderLayer::LayerList, WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>)
9   0x109b770b4 WebCore::RenderLayer::paintLayerContents(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>)
10  0x109b76620 WebCore::RenderLayer::paintLayerContentsAndReflection(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>)
11  0x109b76400 WebCore::RenderLayer::paintLayerByApplyingTransform(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>, WebCore::LayoutSize const&)
12  0x109b756dc WebCore::RenderLayer::paintLayerWithEffects(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>)
13  0x109b74be8 WebCore::RenderLayer::paintLayer(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>)
14  0x109b7a64c WebCore::RenderLayer::paintList(WebCore::RenderLayer::LayerList, WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>)
15  0x109b770b4 WebCore::RenderLayer::paintLayerContents(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>)
16  0x109b95d84 WebCore::RenderLayerBacking::paintIntoLayer(WebCore::GraphicsLayer const*, WebCore::GraphicsContext&, WebCore::IntRect const&, WTF::OptionSet<WebCore::PaintBehavior>, WebCore::EventRegionContext*)::$_25::operator()(WebCore::RenderLayer&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) const
17  0x109b95804 WebCore::RenderLayerBacking::paintIntoLayer(WebCore::GraphicsLayer const*, WebCore::GraphicsContext&, WebCore::IntRect const&, WTF::OptionSet<WebCore::PaintBehavior>, WebCore::EventRegionContext*)
18  0x109b969cc WebCore::RenderLayerBacking::paintContents(WebCore::GraphicsLayer const*, WebCore::GraphicsContext&, WebCore::FloatRect const&, unsigned int)
19  0x1094abe38 WebCore::GraphicsLayer::paintGraphicsLayerContents(WebCore::GraphicsContext&, WebCore::FloatRect const&, unsigned int)
20  0x10958bbdc WebCore::GraphicsLayerCA::platformCALayerPaintContents(WebCore::PlatformCALayer*, WebCore::GraphicsContext&, WebCore::FloatRect const&, unsigned int)
21  0x106e8a3d4 WebCore::PlatformCALayer::drawLayerContents(WebCore::GraphicsContext&, WebCore::PlatformCALayer*, WTF::Vector<WebCore::FloatRect, 5ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc>&, unsigned int)
22  0x1095cb29c WebCore::TileGrid::platformCALayerPaintContents(WebCore::PlatformCALayer*, WebCore::GraphicsContext&, WebCore::FloatRect const&, unsigned int)
23  0x106f483ec -[WebSimpleLayer drawInContext:]
24  0x1b8ab6660 CABackingStoreUpdate_
25  0x1b8b15464 invocation function for block in CA::Layer::display_()
26  0x1b8ab58d0 -[CALayer _display]
27  0x106f481d8 -[WebSimpleLayer display]
28  0x1b8ab49d8 CA::Layer::display_if_needed(CA::Transaction*)
29  0x1b8bf6aac CA::Context::commit_transaction(CA::Transaction*, double, double*)
30  0x1b8a96d78 CA::Transaction::commit()
31  0x12c3b8fcc WebKit::TiledCoreAnimationDrawingArea::forceRepaint()


https://results.webkit.org/?suite=layout-tests&test=fast%2Flayers%2Ftop-layer-ancestor-opacity-and-transform-crash.html&limit=31116

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