webgl/2.0.y/conformance/extensions/webgl-compressed-texture-s3tc-srgb.html webgl/1.0.3/conformance/extensions/oes-texture-float.html webgl/2.0.0/conformance/extensions/ext-blend-minmax.html are flaky crashes on Catalina and BigSur wk1 Debug and Catalina wk1 debug EWS History: https://results.webkit.org/?suite=layout-tests&suite=layout-tests&suite=layout-tests&test=webgl%2F1.0.3%2Fconformance%2Fextensions%2Foes-texture-float.html&test=webgl%2F2.0.0%2Fconformance%2Fextensions%2Fext-blend-minmax.html&test=webgl%2F2.0.y%2Fconformance%2Fextensions%2Fwebgl-compressed-texture-s3tc-srgb.html&platform=mac&platform=ios Results: https://ews-build.s3-us-west-2.amazonaws.com/macOS-Catalina-Debug-WK1-Tests-EWS/r439325-16089-rerun/results.html, https://ews-build.s3-us-west-2.amazonaws.com/macOS-Catalina-Debug-WK1-Tests-EWS/r439320-16085-rerun/results.html, https://ews-build.s3-us-west-2.amazonaws.com/macOS-Catalina-Debug-WK1-Tests-EWS/r439320-16085/results.html No crash log found for DumpRenderTree:4975. stdout: stderr: ASSERTION FAILED: !needsLayout() ./page/FrameView.cpp(4334) : virtual void WebCore::FrameView::paintContents(WebCore::GraphicsContext &, const WebCore::IntRect &, WebCore::Widget::SecurityOriginPaintPolicy, WebCore::EventRegionContext *) 1 0x10769cfb9 WTFCrash 2 0x128d31e9b WTFCrashWithInfo(int, char const*, char const*, int) 3 0x12ce9f58b WebCore::FrameView::paintContents(WebCore::GraphicsContext&, WebCore::IntRect const&, WebCore::Widget::SecurityOriginPaintPolicy, WebCore::EventRegionContext*) 4 0x144987927 -[WebFrame(WebInternal) _drawRect:contentsOnly:] 5 0x1449ad9e6 -[WebHTMLView drawSingleRect:] 6 0x1449ae101 -[WebHTMLView drawRect:] 7 0x7fff3570c59f _NSViewDrawRect 8 0x7fff3570b8ae -[NSView(NSInternal) _recursive:displayRectIgnoringOpacity:inContext:stopAtLayerBackedViews:] 9 0x1449a0dd8 -[WebHTMLView(WebPrivate) _recursive:displayRectIgnoringOpacity:inContext:stopAtLayerBackedViews:] 10 0x7fff3570bc3f -[NSView(NSInternal) _recursive:displayRectIgnoringOpacity:inContext:stopAtLayerBackedViews:] 11 0x7fff3570bc3f -[NSView(NSInternal) _recursive:displayRectIgnoringOpacity:inContext:stopAtLayerBackedViews:] 12 0x7fff3570bc3f -[NSView(NSInternal) _recursive:displayRectIgnoringOpacity:inContext:stopAtLayerBackedViews:] 13 0x7fff358a0c58 -[NSView displayRectIgnoringOpacity:inContext:] 14 0x12b0bdfba WebCore::Widget::paint(WebCore::GraphicsContext&, WebCore::IntRect const&, WebCore::Widget::SecurityOriginPaintPolicy, WebCore::EventRegionContext*) 15 0x12d12066a WebCore::ScrollView::paint(WebCore::GraphicsContext&, WebCore::IntRect const&, WebCore::Widget::SecurityOriginPaintPolicy, WebCore::EventRegionContext*) 16 0x12dbc73bb WebCore::RenderWidget::paintContents(WebCore::PaintInfo&, WebCore::LayoutPoint const&) 17 0x12dbc7ce7 WebCore::RenderWidget::paint(WebCore::PaintInfo&, WebCore::LayoutPoint const&) 18 0x12da43b6c WebCore::RenderLayer::paintForegroundForFragmentsWithPhase(WebCore::PaintPhase, WTF::Vector<WebCore::LayerFragment, 1ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> const&, WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::PaintBehavior>, WebCore::RenderObject*) 19 0x12da41608 WebCore::RenderLayer::paintForegroundForFragments(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*) 20 0x12da3d087 WebCore::RenderLayer::paintLayerContents(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) 21 0x12da622ad 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 22 0x12da61bc5 WebCore::RenderLayerBacking::paintIntoLayer(WebCore::GraphicsLayer const*, WebCore::GraphicsContext&, WebCore::IntRect const&, WTF::OptionSet<WebCore::PaintBehavior>, WebCore::EventRegionContext*) 23 0x12da6311c WebCore::RenderLayerBacking::paintContents(WebCore::GraphicsLayer const*, WebCore::GraphicsContext&, WebCore::FloatRect const&, unsigned int) 24 0x12d2f9b3a WebCore::GraphicsLayer::paintGraphicsLayerContents(WebCore::GraphicsContext&, WebCore::FloatRect const&, unsigned int) 25 0x12d3d02df WebCore::GraphicsLayerCA::platformCALayerPaintContents(WebCore::PlatformCALayer*, WebCore::GraphicsContext&, WebCore::FloatRect const&, unsigned int) 26 0x12ac7fcc0 WebCore::PlatformCALayer::drawLayerContents(WebCore::GraphicsContext&, WebCore::PlatformCALayer*, WTF::Vector<WebCore::FloatRect, 5ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc>&, unsigned int) 27 0x12ade093c -[WebLayer drawInContext:] 28 0x7fff43e3d86d CABackingStoreUpdate_ 29 0x7fff43e9d4ad invocation function for block in CA::Layer::display_() 30 0x7fff43e3cd86 -[CALayer _display] 31 0x12ade10bb -[WebSimpleLayer display]