A debug assert is firing in the layout test 'fast/images/large-size-image-crash.html' with the following stack trace: WTF.dll!WTFCrash() Line 321 C++ > WebKit.dll!WTF::safeCast<int,unsigned int>(unsigned int value) Line 164 C++ WebKit.dll!WebCore::BitmapImage::cacheFrame(unsigned int index, short subsamplingLevel, WebCore::BitmapImage::ImageFrameCaching frameCaching) Line 206 C++ WebKit.dll!WebCore::BitmapImage::frameAtIndex(unsigned int index, float presentationScaleHint) Line 410 C++ WebKit.dll!WebCore::BitmapImage::draw(WebCore::GraphicsContext * ctxt, const WebCore::FloatRect & destRect, const WebCore::FloatRect & srcRect, WebCore::ColorSpace styleColorSpace, WebCore::CompositeOperator compositeOp, WebCore::BlendMode blendMode, WebCore::ImageOrientationDescription description) Line 222 C++ WebKit.dll!WebCore::GraphicsContext::drawImage(WebCore::Image * image, WebCore::ColorSpace colorSpace, const WebCore::FloatRect & destination, const WebCore::FloatRect & source, const WebCore::ImagePaintingOptions & imagePaintingOptions) Line 569 C++ WebKit.dll!WebCore::GraphicsContext::drawImage(WebCore::Image * image, WebCore::ColorSpace colorSpace, const WebCore::FloatRect & destination, const WebCore::ImagePaintingOptions & imagePaintingOptions) Line 559 C++ WebKit.dll!WebCore::RenderImage::paintIntoRect(WebCore::GraphicsContext * context, const WebCore::FloatRect & rect) Line 570 C++ WebKit.dll!WebCore::RenderImage::paintReplaced(WebCore::PaintInfo & paintInfo, const WebCore::LayoutPoint & paintOffset) Line 483 C++ WebKit.dll!WebCore::RenderReplaced::paint(WebCore::PaintInfo & paintInfo, const WebCore::LayoutPoint & paintOffset) Line 183 C++ WebKit.dll!WebCore::RenderImage::paint(WebCore::PaintInfo & paintInfo, const WebCore::LayoutPoint & paintOffset) Line 499 C++ WebKit.dll!WebCore::InlineElementBox::paint(WebCore::PaintInfo & paintInfo, const WebCore::LayoutPoint & paintOffset, WebCore::LayoutUnit __formal, WebCore::LayoutUnit __formal) Line 89 C++ WebKit.dll!WebCore::InlineFlowBox::paint(WebCore::PaintInfo & paintInfo, const WebCore::LayoutPoint & paintOffset, WebCore::LayoutUnit lineTop, WebCore::LayoutUnit lineBottom) Line 1167 C++ WebKit.dll!WebCore::RootInlineBox::paint(WebCore::PaintInfo & paintInfo, const WebCore::LayoutPoint & paintOffset, WebCore::LayoutUnit lineTop, WebCore::LayoutUnit lineBottom) Line 187 C++ WebKit.dll!WebCore::RenderLineBoxList::paint(WebCore::RenderBoxModelObject * renderer, WebCore::PaintInfo & paintInfo, const WebCore::LayoutPoint & paintOffset) Line 268 C++ WebKit.dll!WebCore::RenderBlockFlow::paintInlineChildren(WebCore::PaintInfo & paintInfo, const WebCore::LayoutPoint & paintOffset) Line 3414 C++ WebKit.dll!WebCore::RenderBlock::paintContents(WebCore::PaintInfo & paintInfo, const WebCore::LayoutPoint & paintOffset) Line 1458 C++ WebKit.dll!WebCore::RenderBlock::paintObject(WebCore::PaintInfo & paintInfo, const WebCore::LayoutPoint & paintOffset) Line 1607 C++ WebKit.dll!WebCore::RenderBlock::paint(WebCore::PaintInfo & paintInfo, const WebCore::LayoutPoint & paintOffset) Line 1438 C++ WebKit.dll!WebCore::RenderBlock::paintChild(WebCore::RenderBox & child, WebCore::PaintInfo & paintInfo, const WebCore::LayoutPoint & paintOffset, WebCore::PaintInfo & paintInfoForChild, bool usePrintRect) Line 1510 C++ WebKit.dll!WebCore::RenderBlock::paintChildren(WebCore::PaintInfo & paintInfo, const WebCore::LayoutPoint & paintOffset, WebCore::PaintInfo & paintInfoForChild, bool usePrintRect) Line 1477 C++ WebKit.dll!WebCore::RenderBlock::paintContents(WebCore::PaintInfo & paintInfo, const WebCore::LayoutPoint & paintOffset) Line 1472 C++ WebKit.dll!WebCore::RenderBlock::paintObject(WebCore::PaintInfo & paintInfo, const WebCore::LayoutPoint & paintOffset) Line 1607 C++ WebKit.dll!WebCore::RenderBlock::paint(WebCore::PaintInfo & paintInfo, const WebCore::LayoutPoint & paintOffset) Line 1438 C++ WebKit.dll!WebCore::RenderBlock::paintChild(WebCore::RenderBox & child, WebCore::PaintInfo & paintInfo, const WebCore::LayoutPoint & paintOffset, WebCore::PaintInfo & paintInfoForChild, bool usePrintRect) Line 1510 C++ WebKit.dll!WebCore::RenderBlock::paintChildren(WebCore::PaintInfo & paintInfo, const WebCore::LayoutPoint & paintOffset, WebCore::PaintInfo & paintInfoForChild, bool usePrintRect) Line 1477 C++ WebKit.dll!WebCore::RenderBlock::paintContents(WebCore::PaintInfo & paintInfo, const WebCore::LayoutPoint & paintOffset) Line 1472 C++ WebKit.dll!WebCore::RenderBlock::paintObject(WebCore::PaintInfo & paintInfo, const WebCore::LayoutPoint & paintOffset) Line 1607 C++ WebKit.dll!WebCore::RenderBlock::paint(WebCore::PaintInfo & paintInfo, const WebCore::LayoutPoint & paintOffset) Line 1438 C++ WebKit.dll!WebCore::RenderLayer::paintForegroundForFragmentsWithPhase(WebCore::PaintPhase phase, const WTF::Vector<WebCore::LayerFragment,1,WTF::CrashOnOverflow> & layerFragments, WebCore::GraphicsContext * context, const WebCore::RenderLayer::LayerPaintingInfo & localPaintingInfo, unsigned int paintBehavior, WebCore::RenderObject * subtreePaintRootForRenderer) Line 4589 C++ WebKit.dll!WebCore::RenderLayer::paintForegroundForFragments(const WTF::Vector<WebCore::LayerFragment,1,WTF::CrashOnOverflow> & layerFragments, WebCore::GraphicsContext * context, WebCore::GraphicsContext * transparencyLayerContext, const WebCore::LayoutRect & transparencyPaintDirtyRect, bool haveTransparency, const WebCore::RenderLayer::LayerPaintingInfo & localPaintingInfo, unsigned int paintBehavior, WebCore::RenderObject * subtreePaintRootForRenderer, bool selectionOnly) Line 4554 C++ WebKit.dll!WebCore::RenderLayer::paintLayerContents(WebCore::GraphicsContext * context, const WebCore::RenderLayer::LayerPaintingInfo & paintingInfo, unsigned int paintFlags) Line 4174 C++ WebKit.dll!WebCore::RenderLayer::paintLayerContentsAndReflection(WebCore::GraphicsContext * context, const WebCore::RenderLayer::LayerPaintingInfo & paintingInfo, unsigned int paintFlags) Line 3847 C++ WebKit.dll!WebCore::RenderLayer::paintLayer(WebCore::GraphicsContext * context, const WebCore::RenderLayer::LayerPaintingInfo & paintingInfo, unsigned int paintFlags) Line 3829 C++ WebKit.dll!WebCore::RenderLayer::paintList(WTF::Vector<WebCore::RenderLayer *,0,WTF::CrashOnOverflow> * list, WebCore::GraphicsContext * context, const WebCore::RenderLayer::LayerPaintingInfo & paintingInfo, unsigned int paintFlags) Line 4271 C++ WebKit.dll!WebCore::RenderLayer::paintLayerContents(WebCore::GraphicsContext * context, const WebCore::RenderLayer::LayerPaintingInfo & paintingInfo, unsigned int paintFlags) Line 4185 C++ WebKit.dll!WebCore::RenderLayer::paintLayerContentsAndReflection(WebCore::GraphicsContext * context, const WebCore::RenderLayer::LayerPaintingInfo & paintingInfo, unsigned int paintFlags) Line 3847 C++ WebKit.dll!WebCore::RenderLayer::paintLayer(WebCore::GraphicsContext * context, const WebCore::RenderLayer::LayerPaintingInfo & paintingInfo, unsigned int paintFlags) Line 3829 C++ WebKit.dll!WebCore::RenderLayer::paint(WebCore::GraphicsContext * context, const WebCore::LayoutRect & damageRect, const WebCore::LayoutSize & subpixelAccumulation, unsigned int paintBehavior, WebCore::RenderObject * subtreePaintRoot, unsigned int paintFlags) Line 3633 C++ WebKit.dll!WebCore::FrameView::paintContents(WebCore::GraphicsContext * context, const WebCore::IntRect & dirtyRect) Line 3874 C++ WebKit.dll!WebCore::ScrollView::paint(WebCore::GraphicsContext * context, const WebCore::IntRect & rect) Line 1225 C++ WebKit.dll!WebView::paintIntoBackingStore(WebCore::FrameView * frameView, HDC__ * bitmapDC, const WebCore::IntRect & dirtyRect, WebView::WindowsToPaint windowsToPaint) Line 1235 C++ WebKit.dll!WebView::updateBackingStore(WebCore::FrameView * frameView, HDC__ * dc, bool backingStoreCompletelyDirty, WebView::WindowsToPaint windowsToPaint) Line 1060 C++ WebKit.dll!WebView::paint(HDC__ * dc, long options) Line 1170 C++ WebKit.dll!WebView::WebViewWndProc(HWND__ * hWnd, unsigned int message, unsigned int wParam, long lParam) Line 2261 C++ [External Code] DumpRenderTree.dll!dump() Line 684 C++ DumpRenderTree.dll!FrameLoadDelegate::locationChangeDone(IWebError * __formal, IWebFrame * frame) Line 250 C++ DumpRenderTree.dll!FrameLoadDelegate::didFinishLoadForFrame(IWebView * __formal, IWebFrame * frame) Line 258 C++ WebKit.dll!WebFrameLoaderClient::dispatchDidFinishLoad() Line 497 C++ WebKit.dll!WebCore::FrameLoader::checkLoadCompleteForThisFrame() Line 2286 C++ WebKit.dll!WebCore::FrameLoader::checkLoadComplete() Line 2466 C++ WebKit.dll!WebCore::FrameLoader::checkCompleted() Line 857 C++ WebKit.dll!WebCore::FrameLoader::loadDone() Line 784 C++ WebKit.dll!WebCore::CachedResourceLoader::loadDone(WebCore::CachedResource * resource, bool shouldPerformPostLoadActions) Line 834 C++ WebKit.dll!WebCore::SubresourceLoader::notifyDone() Line 437 C++ WebKit.dll!WebCore::SubresourceLoader::didFinishLoading(double finishTime) Line 363 C++ WebKit.dll!WebCore::ResourceLoader::didFinishLoading(WebCore::ResourceHandle * __formal, double finishTime) Line 503 C++ WebKit.dll!WebCore::SynchronousResourceHandleCFURLConnectionDelegate::didFinishLoading() Line 181 C++ WebKit.dll!WebCore::ResourceHandleCFURLConnectionDelegate::didFinishLoadingCallback(_CFURLConnection * __formal, const void * clientInfo) Line 88 C++ CFNetwork.dll!URLConnectionClient::_clientDidFinishLoading(URLConnectionClient::ClientConnectionEventQueue * preQ) Line 1739 C++ CFNetwork.dll!URLConnectionClient::ClientConnectionEventQueue::processAllEventsAndConsumePayload(XConnectionEventInfo<enum XClientEvent,XClientEventParams> * e, long count) Line 2256 C++ CFNetwork.dll!XConnectionEventQueue<enum XClientEvent,XClientEventParams>::processAllEvents() Line 231 C++ CFNetwork.dll!URLConnectionClient::processEvents() Line 362 C++ CFNetwork.dll!MultiplexerSource::perform() Line 229 C++ CoreFoundation.dll!__CFRunLoopDoSources0(__CFRunLoop * rl, __CFRunLoopMode * rlm, unsigned char stopAfterHandle) Line 41844 C++ CoreFoundation.dll!__CFRunLoopRun(__CFRunLoop * rl, __CFRunLoopMode * rlm, double seconds, unsigned char stopAfterHandle, __CFRunLoopMode * previousMode) Line 42281 C++ CoreFoundation.dll!CFRunLoopRunSpecific(__CFRunLoop * rl, const __CFString * modeName, double seconds, unsigned char returnAfterSourceHandled) Line 42477 C++ CoreFoundation.dll!CFRunLoopRunInMode(const __CFString * modeName, double seconds, unsigned char returnAfterSourceHandled) Line 42511 C++ DumpRenderTree.dll!runTest(const std::basic_string<char,std::char_traits<char>,std::allocator<char> > & inputLine) Line 1120 C++ DumpRenderTree.dll!main(int argc, const char * * argv) Line 1476 C++ DumpRenderTree.dll!dllLauncherEntryPoint(int argc, const char * * argv) Line 1506 C++ DumpRenderTree.exe!main(int argc, const char * * argv) Line 239 C++ SafeCast is angry that the value is not in the bounds of the expected type: value = 3,105,862,920 FromType is unsigned int ToType is int Since the Windows bot is a 32-bit build, this failure makes sense.
See also: rdar://problem/27491960