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<head>
<base href="https://bugs.webkit.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - ASSERTION FAILED: is<Target>(source) in WTF::downcast"
href="https://bugs.webkit.org/show_bug.cgi?id=155656">155656</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>ASSERTION FAILED: is<Target>(source) in WTF::downcast
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>Product</th>
<td>WebKit
</td>
</tr>
<tr>
<th>Version</th>
<td>WebKit Local Build
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Unspecified
</td>
</tr>
<tr>
<th>OS</th>
<td>Unspecified
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>Normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P2
</td>
</tr>
<tr>
<th>Component</th>
<td>Layout and Rendering
</td>
</tr>
<tr>
<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>rhodovan.u-szeged@partner.samsung.com
</td>
</tr>
<tr>
<th>CC</th>
<td>simon.fraser@apple.com
</td>
</tr>
<tr>
<th>Blocks</th>
<td>116980
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=274438" name="attach_274438" title="Test case">attachment 274438</a> <a href="attachment.cgi?id=274438&action=edit" title="Test case">[details]</a></span>
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</pre>
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