[Webkit-unassigned] [Bug 155656] New: ASSERTION FAILED: is<Target>(source) in WTF::downcast

Fri Mar 18 11:32:15 PDT 2016

https://bugs.webkit.org/show_bug.cgi?id=155656

            Bug ID: 155656
           Summary: ASSERTION FAILED: is<Target>(source) in WTF::downcast
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: rhodovan.u-szeged at partner.samsung.com
                CC: simon.fraser at apple.com
            Blocks: 116980

Created attachment 274438
  --> https://bugs.webkit.org/attachment.cgi?id=274438&action=review
Test case

Load the attached test with minibrowser:

<!DOCTYPE html>
<style>
* {
    will-change:filter;
    display: initial; 
}
</style>
<meta><body background="foo.bar">

OS: Ubuntu 15.10, x86_64
Checked build: debug EFL
Checked version: 87dc80e

Note: could not repro on MAC.

Backtrace:

ASSERTION FAILED: is<Target>(source)
../../Source/WTF/wtf/TypeCasts.h(80) : typename WTF::match_constness<Source, Target>::type& WTF::downcast(Source&) [with Target = WebCore::RenderBox; Source = WebCore::RenderLayerModelObject; typename WTF::match_constness<Source, Target>::type = WebCore::RenderBox]
1   0x7fbd79497e8a WTFCrash
2   0x7fbd79497ea0
3   0x7fbd78274e78 WTF::match_constness<WebCore::RenderLayerModelObject, WebCore::RenderBox>::type& WTF::downcast<WebCore::RenderBox, WebCore::RenderLayerModelObject>(WebCore::RenderLayerModelObject&)
4   0x7fbd783b1bbb WebCore::RenderLayerBacking::updateDirectlyCompositedBackgroundImage(bool, bool&)
5   0x7fbd783ae7ec WebCore::RenderLayerBacking::updateDirectlyCompositedContents(bool, bool&)
6   0x7fbd783ab319 WebCore::RenderLayerBacking::updateConfiguration()
7   0x7fbd783bcd2b WebCore::RenderLayerCompositor::rebuildCompositingLayerTree(WebCore::RenderLayer&, WTF::Vector<WebCore::GraphicsLayer*, 0ul, WTF::CrashOnOverflow, 16ul>&, int)
8   0x7fbd783bd0db WebCore::RenderLayerCompositor::rebuildCompositingLayerTree(WebCore::RenderLayer&, WTF::Vector<WebCore::GraphicsLayer*, 0ul, WTF::CrashOnOverflow, 16ul>&, int)
9   0x7fbd783bd0db WebCore::RenderLayerCompositor::rebuildCompositingLayerTree(WebCore::RenderLayer&, WTF::Vector<WebCore::GraphicsLayer*, 0ul, WTF::CrashOnOverflow, 16ul>&, int)
10  0x7fbd783b9797 WebCore::RenderLayerCompositor::updateCompositingLayers(WebCore::CompositingUpdateType, WebCore::RenderLayer*)
11  0x7fbd780179db WebCore::FrameView::updateCompositingLayersAfterLayout()
12  0x7fbd7801985e WebCore::FrameView::layout(bool)
13  0x7fbd77a64d40 WebCore::Document::implicitClose()
14  0x7fbd77ee2681 WebCore::FrameLoader::checkCallImplicitClose()
15  0x7fbd77ee23b1 WebCore::FrameLoader::checkCompleted()
16  0x7fbd77ee21c2 WebCore::FrameLoader::loadDone()
17  0x7fbd77f7872d WebCore::CachedResourceLoader::loadDone(WebCore::CachedResource*, bool)
18  0x7fbd77f2d075 WebCore::SubresourceLoader::notifyDone()
19  0x7fbd77f2cd55 WebCore::SubresourceLoader::didFail(WebCore::ResourceError const&)
20  0x7fbd775011d5 WebKit::WebResourceLoader::didFailResourceLoad(WebCore::ResourceError const&)
21  0x7fbd777b4568 void IPC::callMemberFunctionImpl<WebKit::WebResourceLoader, void (WebKit::WebResourceLoader::*)(WebCore::ResourceError const&), std::tuple<WebCore::ResourceError>, 0ul>(WebKit::WebResourceLoader*, void (WebKit::WebResourceLoader::*)(WebCore::ResourceError const&), std::tuple<WebCore::ResourceError>&&, std::index_sequence<0ul>)
22  0x7fbd777b3e13 void IPC::callMemberFunction<WebKit::WebResourceLoader, void (WebKit::WebResourceLoader::*)(WebCore::ResourceError const&), std::tuple<WebCore::ResourceError>, std::make_index_sequence<1ul> >(std::tuple<WebCore::ResourceError>&&, WebKit::WebResourceLoader*, void (WebKit::WebResourceLoader::*)(WebCore::ResourceError const&))
23  0x7fbd777b3a7b void IPC::handleMessage<Messages::WebResourceLoader::DidFailResourceLoad, WebKit::WebResourceLoader, void (WebKit::WebResourceLoader::*)(WebCore::ResourceError const&)>(IPC::MessageDecoder&, WebKit::WebResourceLoader*, void (WebKit::WebResourceLoader::*)(WebCore::ResourceError const&))
24  0x7fbd777b30f5 WebKit::WebResourceLoader::didReceiveWebResourceLoaderMessage(IPC::Connection&, IPC::MessageDecoder&)
25  0x7fbd774f6f39 WebKit::NetworkProcessConnection::didReceiveMessage(IPC::Connection&, IPC::MessageDecoder&)
26  0x7fbd77214b2c IPC::Connection::dispatchMessage(IPC::MessageDecoder&)
27  0x7fbd77214c90 IPC::Connection::dispatchMessage(std::unique_ptr<IPC::MessageDecoder, std::default_delete<IPC::MessageDecoder> >)
28  0x7fbd77214e7d IPC::Connection::dispatchOneMessage()
29  0x7fbd7721493f
30  0x7fbd7721644d
31  0x7fbd771e6186 std::function<void ()>::operator()() const

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