223285 2021-03-16 15:35:39 -0700 REGRESSION (r274473): ASSERTION FAILED: isCSSStackingContext() in WebCore::RenderLayer::beginTransparencyLayers 2021-03-16 15:52:41 -0700 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified RESOLVED DUPLICATE 223287 https://bugs.webkit.org/show_bug.cgi?id=223208 InRadar P2 Normal --- 1 ryanhaddad webkit-unassigned akeerthi webkit-bot-watchers-bugzilla webkit-bug-importer oldest_to_newest 1740260 0 ryanhaddad 2021-03-16 15:35:39 -0700 Seeing the following assert on iOS debug bots with some DragAndDrop API tests ASSERTION FAILED: isCSSStackingContext() ./rendering/RenderLayer.cpp(2122) : void WebCore::RenderLayer::beginTransparencyLayers(WebCore::GraphicsContext &, const WebCore::RenderLayer::LayerPaintingInfo &, const WebCore::LayoutRect &) 1 0x12a7eac29 WTFCrash 2 0x132a8589b WTFCrashWithInfo(int, char const*, char const*, int) 3 0x13712fd87 WebCore::RenderLayer::beginTransparencyLayers(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WebCore::LayoutRect const&) 4 0x13713bf5e 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*) 5 0x137138288 WebCore::RenderLayer::paintLayerContents(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) 6 0x1371377ed WebCore::RenderLayer::paintLayerContentsAndReflection(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) 7 0x13713669a WebCore::RenderLayer::paintLayerWithEffects(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) 8 0x137135940 WebCore::RenderLayer::paintLayer(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) 9 0x13713c248 WebCore::RenderLayer::paintList(WebCore::RenderLayer::LayerList, WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) 10 0x1371384c0 WebCore::RenderLayer::paintLayerContents(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) 11 0x1371377ed WebCore::RenderLayer::paintLayerContentsAndReflection(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) 12 0x13713669a WebCore::RenderLayer::paintLayerWithEffects(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) 13 0x137135940 WebCore::RenderLayer::paintLayer(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) 14 0x13713c248 WebCore::RenderLayer::paintList(WebCore::RenderLayer::LayerList, WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) 15 0x1371384c0 WebCore::RenderLayer::paintLayerContents(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) 16 0x13715d67d WebCore::RenderLayerBacking::paintIntoLayer(WebCore::GraphicsLayer const*, WebCore::GraphicsContext&, WebCore::IntRect const&, WTF::OptionSet<WebCore::PaintBehavior>, WebCore::EventRegionContext*)::$_24::operator()(WebCore::RenderLayer&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) const 17 0x13715cf92 WebCore::RenderLayerBacking::paintIntoLayer(WebCore::GraphicsLayer const*, WebCore::GraphicsContext&, WebCore::IntRect const&, WTF::OptionSet<WebCore::PaintBehavior>, WebCore::EventRegionContext*) 18 0x13715eabf WebCore::RenderLayerBacking::paintContents(WebCore::GraphicsLayer const*, WebCore::GraphicsContext&, WebCore::FloatRect const&, unsigned int) 19 0x136abb5a4 WebCore::GraphicsLayer::paintGraphicsLayerContents(WebCore::GraphicsContext&, WebCore::FloatRect const&, unsigned int) 20 0x136b6dd96 WebCore::GraphicsLayerCA::platformCALayerPaintContents(WebCore::PlatformCALayer*, WebCore::GraphicsContext&, WebCore::FloatRect const&, unsigned int) 21 0x1346070af WebCore::PlatformCALayer::drawLayerContents(WebCore::GraphicsContext&, WebCore::PlatformCALayer*, WTF::Vector<WebCore::FloatRect, 5ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc>&, unsigned int) 22 0x136bb4ecb WebCore::TileGrid::platformCALayerPaintContents(WebCore::PlatformCALayer*, WebCore::GraphicsContext&, WebCore::FloatRect const&, unsigned int) 23 0x110e8c79e WebKit::RemoteLayerBackingStore::display() 24 0x111e9725d WebKit::PlatformCALayerRemote::recursiveBuildTransaction(WebKit::RemoteLayerTreeContext&, WebKit::RemoteLayerTreeTransaction&) 25 0x111e97504 WebKit::PlatformCALayerRemote::recursiveBuildTransaction(WebKit::RemoteLayerTreeContext&, WebKit::RemoteLayerTreeTransaction&) 26 0x111e97504 WebKit::PlatformCALayerRemote::recursiveBuildTransaction(WebKit::RemoteLayerTreeContext&, WebKit::RemoteLayerTreeTransaction&) 27 0x111e97504 WebKit::PlatformCALayerRemote::recursiveBuildTransaction(WebKit::RemoteLayerTreeContext&, WebKit::RemoteLayerTreeTransaction&) 28 0x111e97504 WebKit::PlatformCALayerRemote::recursiveBuildTransaction(WebKit::RemoteLayerTreeContext&, WebKit::RemoteLayerTreeTransaction&) 29 0x111914a47 WebKit::RemoteLayerTreeContext::buildTransaction(WebKit::RemoteLayerTreeTransaction&, WebCore::PlatformCALayer&) 30 0x11077d06e WebKit::RemoteLayerTreeDrawingArea::updateRendering() 31 0x110787957 decltype(*(std::__1::forward<WebKit::RemoteLayerTreeDrawingArea*&>(fp0)).*fp()) std::__1::__invoke<void (WebKit::RemoteLayerTreeDrawingArea::*&)(), WebKit::RemoteLayerTreeDrawingArea*&, void>(void (WebKit::RemoteLayerTreeDrawingArea::*&)(), WebKit::RemoteLayerTreeDrawingArea*&) https://build.webkit.org/#/builders/59/builds/515/steps/11/logs/stdio 1740262 1 webkit-bug-importer 2021-03-16 15:36:00 -0700 <rdar://problem/75497769> 1740278 2 akeerthi 2021-03-16 15:52:41 -0700 *** This bug has been marked as a duplicate of bug 223287 ***