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<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: view().layoutDeltaMatches(oldLayoutDelta) in WebCore::RenderBlockFlow::layoutBlockChild"
href="https://bugs.webkit.org/show_bug.cgi?id=166819">166819</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>ASSERTION FAILED: view().layoutDeltaMatches(oldLayoutDelta) in WebCore::RenderBlockFlow::layoutBlockChild
</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>hodovan@inf.u-szeged.hu
</td>
</tr>
<tr>
<th>CC</th>
<td>simon.fraser@apple.com
</td>
</tr></table>
<p>
<div>
<pre>Load the attached test with debug WebKitTestRunner:
Checked version: 217d599
OS: Darwin-15.6.0-x86_64-i386-64bit
<style>{}*{margin-bottom:-20932678!important</style><blockquote>L</blockquote><footer>t</footer>9
Backtrace:
ASSERTION FAILED: view().layoutDeltaMatches(oldLayoutDelta)
WebKit/Source/WebCore/rendering/RenderBlockFlow.cpp(794) : void WebCore::RenderBlockFlow::layoutBlockChild(WebCore::RenderBox &, WebCore::RenderBlockFlow::MarginInfo &, WebCore::LayoutUnit &, WebCore::LayoutUnit &)
1 0x10b2144f1 WTFCrash
2 0x11427abea WebCore::RenderBlockFlow::layoutBlockChild(WebCore::RenderBox&, WebCore::RenderBlockFlow::MarginInfo&, WebCore::LayoutUnit&, WebCore::LayoutUnit&)
3 0x114271f50 WebCore::RenderBlockFlow::layoutBlockChildren(bool, WebCore::LayoutUnit&)
4 0x11426e808 WebCore::RenderBlockFlow::layoutBlock(bool, WebCore::LayoutUnit)
5 0x1141b81b2 WebCore::RenderBlock::layout()
6 0x1142793e4 WebCore::RenderBlockFlow::layoutBlockChild(WebCore::RenderBox&, WebCore::RenderBlockFlow::MarginInfo&, WebCore::LayoutUnit&, WebCore::LayoutUnit&)
7 0x114271f50 WebCore::RenderBlockFlow::layoutBlockChildren(bool, WebCore::LayoutUnit&)
8 0x11426e808 WebCore::RenderBlockFlow::layoutBlock(bool, WebCore::LayoutUnit)
9 0x1141b81b2 WebCore::RenderBlock::layout()
10 0x1142793e4 WebCore::RenderBlockFlow::layoutBlockChild(WebCore::RenderBox&, WebCore::RenderBlockFlow::MarginInfo&, WebCore::LayoutUnit&, WebCore::LayoutUnit&)
11 0x114271f50 WebCore::RenderBlockFlow::layoutBlockChildren(bool, WebCore::LayoutUnit&)
12 0x11426e808 WebCore::RenderBlockFlow::layoutBlock(bool, WebCore::LayoutUnit)
13 0x1141b81b2 WebCore::RenderBlock::layout()
14 0x114bff3b6 WebCore::RenderView::layoutContent(WebCore::LayoutState const&)
15 0x114c01816 WebCore::RenderView::layout()
16 0x110fb36a2 WebCore::FrameView::layout(bool)
17 0x11063b9d6 WebCore::Document::implicitClose()
18 0x110f211e3 WebCore::FrameLoader::checkCallImplicitClose()
19 0x110f20ccc WebCore::FrameLoader::checkCompleted()
20 0x110f1d177 WebCore::FrameLoader::finishedParsing()
21 0x11065fab3 WebCore::Document::finishedParsing()
22 0x1112e6556 WebCore::HTMLConstructionSite::finishedParsing()
23 0x1115de5b8 WebCore::HTMLTreeBuilder::finished()
24 0x111359cfc WebCore::HTMLDocumentParser::end()
25 0x1113559e7 WebCore::HTMLDocumentParser::attemptToRunDeferredScriptsAndEnd()
26 0x11135564e WebCore::HTMLDocumentParser::prepareToStopParsing()
27 0x111359d9c WebCore::HTMLDocumentParser::attemptToEnd()
28 0x111359df4 WebCore::HTMLDocumentParser::finish()
29 0x110824980 WebCore::DocumentWriter::end()
30 0x11077ee57 WebCore::DocumentLoader::finishedLoading(double)
31 0x11077e98b WebCore::DocumentLoader::notifyFinished(WebCore::CachedResource&)
ASAN:DEADLYSIGNAL
=================================================================
==18439==ERROR: AddressSanitizer: SEGV on unknown address 0x0000bbadbeef (pc 0x00010b214529 bp 0x7fff5e299350 sp 0x7fff5e299340 T0)
#0 0x10b214528 in WTFCrash (WebKit/WebKitBuild/Debug/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x2d01528)
#1 0x11427abe9 in WebCore::RenderBlockFlow::layoutBlockChild(WebCore::RenderBox&, WebCore::RenderBlockFlow::MarginInfo&, WebCore::LayoutUnit&, WebCore::LayoutUnit&) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x4dcbbe9)
#2 0x114271f4f in WebCore::RenderBlockFlow::layoutBlockChildren(bool, WebCore::LayoutUnit&) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x4dc2f4f)
#3 0x11426e807 in WebCore::RenderBlockFlow::layoutBlock(bool, WebCore::LayoutUnit) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x4dbf807)
#4 0x1141b81b1 in WebCore::RenderBlock::layout() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x4d091b1)
#5 0x1142793e3 in WebCore::RenderBlockFlow::layoutBlockChild(WebCore::RenderBox&, WebCore::RenderBlockFlow::MarginInfo&, WebCore::LayoutUnit&, WebCore::LayoutUnit&) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x4dca3e3)
#6 0x114271f4f in WebCore::RenderBlockFlow::layoutBlockChildren(bool, WebCore::LayoutUnit&) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x4dc2f4f)
#7 0x11426e807 in WebCore::RenderBlockFlow::layoutBlock(bool, WebCore::LayoutUnit) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x4dbf807)
#8 0x1141b81b1 in WebCore::RenderBlock::layout() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x4d091b1)
#9 0x1142793e3 in WebCore::RenderBlockFlow::layoutBlockChild(WebCore::RenderBox&, WebCore::RenderBlockFlow::MarginInfo&, WebCore::LayoutUnit&, WebCore::LayoutUnit&) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x4dca3e3)
#10 0x114271f4f in WebCore::RenderBlockFlow::layoutBlockChildren(bool, WebCore::LayoutUnit&) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x4dc2f4f)
#11 0x11426e807 in WebCore::RenderBlockFlow::layoutBlock(bool, WebCore::LayoutUnit) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x4dbf807)
#12 0x1141b81b1 in WebCore::RenderBlock::layout() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x4d091b1)
#13 0x114bff3b5 in WebCore::RenderView::layoutContent(WebCore::LayoutState const&) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x57503b5)
#14 0x114c01815 in WebCore::RenderView::layout() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x5752815)
#15 0x110fb36a1 in WebCore::FrameView::layout(bool) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x1b046a1)
#16 0x11063b9d5 in WebCore::Document::implicitClose() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x118c9d5)
#17 0x110f211e2 in WebCore::FrameLoader::checkCallImplicitClose() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x1a721e2)
#18 0x110f20ccb in WebCore::FrameLoader::checkCompleted() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x1a71ccb)
#19 0x110f1d176 in WebCore::FrameLoader::finishedParsing() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x1a6e176)
#20 0x11065fab2 in WebCore::Document::finishedParsing() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x11b0ab2)
#21 0x1112e6555 in WebCore::HTMLConstructionSite::finishedParsing() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x1e37555)
#22 0x1115de5b7 in WebCore::HTMLTreeBuilder::finished() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x212f5b7)
#23 0x111359cfb in WebCore::HTMLDocumentParser::end() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x1eaacfb)
#24 0x1113559e6 in WebCore::HTMLDocumentParser::attemptToRunDeferredScriptsAndEnd() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x1ea69e6)
#25 0x11135564d in WebCore::HTMLDocumentParser::prepareToStopParsing() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x1ea664d)
#26 0x111359d9b in WebCore::HTMLDocumentParser::attemptToEnd() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x1eaad9b)
#27 0x111359df3 in WebCore::HTMLDocumentParser::finish() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x1eaadf3)
#28 0x11082497f in WebCore::DocumentWriter::end() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x137597f)
#29 0x11077ee56 in WebCore::DocumentLoader::finishedLoading(double) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x12cfe56)
#30 0x11077e98a in WebCore::DocumentLoader::notifyFinished(WebCore::CachedResource&) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x12cf98a)
#31 0x10fac0b23 in WebCore::CachedResource::checkNotify() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x611b23)
#32 0x10fac0d13 in WebCore::CachedResource::finishLoading(WebCore::SharedBuffer*) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x611d13)
#33 0x10fab5d54 in WebCore::CachedRawResource::finishLoading(WebCore::SharedBuffer*) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x606d54)
#34 0x1155aee8e in WebCore::SubresourceLoader::didFinishLoading(double) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x60ffe8e)
#35 0x10340b43e in WebKit::WebResourceLoader::didFinishResourceLoad(double) (WebKit/WebKitBuild/Debug/WebKit.framework/Versions/A/WebKit+0x1a9143e)
#36 0x1034196ce in void IPC::callMemberFunctionImpl<WebKit::WebResourceLoader, void (WebKit::WebResourceLoader::*)(double), std::__1::tuple<double>, 0ul>(WebKit::WebResourceLoader*, void (WebKit::WebResourceLoader::*)(double), std::__1::tuple<double>&&, std::__1::integer_sequence<unsigned long, 0ul>) (WebKit/WebKitBuild/Debug/WebKit.framework/Versions/A/WebKit+0x1a9f6ce)
#37 0x103419374 in void IPC::callMemberFunction<WebKit::WebResourceLoader, void (WebKit::WebResourceLoader::*)(double), std::__1::tuple<double>, std::__1::integer_sequence<unsigned long, 0ul> >(std::__1::tuple<double>&&, WebKit::WebResourceLoader*, void (WebKit::WebResourceLoader::*)(double)) (WebKit/WebKitBuild/Debug/WebKit.framework/Versions/A/WebKit+0x1a9f374)
#38 0x103416680 in void IPC::handleMessage<Messages::WebResourceLoader::DidFinishResourceLoad, WebKit::WebResourceLoader, void (WebKit::WebResourceLoader::*)(double)>(IPC::Decoder&, WebKit::WebResourceLoader*, void (WebKit::WebResourceLoader::*)(double)) (WebKit/WebKitBuild/Debug/WebKit.framework/Versions/A/WebKit+0x1a9c680)
#39 0x103414a10 in WebKit::WebResourceLoader::didReceiveWebResourceLoaderMessage(IPC::Connection&, IPC::Decoder&) (WebKit/WebKitBuild/Debug/WebKit.framework/Versions/A/WebKit+0x1a9aa10)
#40 0x10213dda9 in WebKit::NetworkProcessConnection::didReceiveMessage(IPC::Connection&, IPC::Decoder&) (WebKit/WebKitBuild/Debug/WebKit.framework/Versions/A/WebKit+0x7c3da9)
#41 0x101b51fba in IPC::Connection::dispatchMessage(IPC::Decoder&) (WebKit/WebKitBuild/Debug/WebKit.framework/Versions/A/WebKit+0x1d7fba)
#42 0x101b3a7c4 in IPC::Connection::dispatchMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >) (WebKit/WebKitBuild/Debug/WebKit.framework/Versions/A/WebKit+0x1c07c4)
#43 0x101b52ca5 in IPC::Connection::dispatchOneMessage() (WebKit/WebKitBuild/Debug/WebKit.framework/Versions/A/WebKit+0x1d8ca5)
#44 0x101b6325c in IPC::Connection::enqueueIncomingMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >)::$_14::operator()() (WebKit/WebKitBuild/Debug/WebKit.framework/Versions/A/WebKit+0x1e925c)
#45 0x101b63188 in WTF::Function<void ()>::CallableWrapper<IPC::Connection::enqueueIncomingMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >)::$_14>::call() (WebKit/WebKitBuild/Debug/WebKit.framework/Versions/A/WebKit+0x1e9188)
#46 0x10b298830 in WTF::Function<void ()>::operator()() const (WebKit/WebKitBuild/Debug/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x2d85830)
#47 0x10b2e2d50 in WTF::RunLoop::performWork() (WebKit/WebKitBuild/Debug/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x2dcfd50)
#48 0x10b2e3b11 in WTF::RunLoop::performWork(void*) (WebKit/WebKitBuild/Debug/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x2dd0b11)
#49 0x7fff81c1f880 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation+0xaa880)
#50 0x7fff81bfefbb in __CFRunLoopDoSources0 (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation+0x89fbb)
#51 0x7fff81bfe4de in __CFRunLoopRun (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation+0x894de)
#52 0x7fff81bfded7 in CFRunLoopRunSpecific (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation+0x88ed7)
#53 0x7fff82fde934 in RunCurrentEventLoopInMode (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox+0x30934)
#54 0x7fff82fde76e in ReceiveNextEventCommon (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox+0x3076e)
#55 0x7fff82fde5ae in _BlockUntilNextEventMatchingListInModeWithFilter (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox+0x305ae)
#56 0x7fff8e643df5 in _DPSNextEvent (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit+0x48df5)
#57 0x7fff8e643225 in -[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:] (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit+0x48225)
#58 0x7fff8e637d7f in -[NSApplication run] (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit+0x3cd7f)
#59 0x7fff8e601367 in NSApplicationMain (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit+0x6367)
#60 0x7fff92f09193 in _xpc_objc_main (/usr/lib/system/libxpc.dylib+0x11193)
#61 0x7fff92f07bbd in xpc_main (/usr/lib/system/libxpc.dylib+0xfbbd)
#62 0x10195df73 in main (WebKit/WebKitBuild/Debug/WebKit.framework/Versions/A/XPCServices/com.apple.WebKit.WebContent.xpc/Contents/MacOS/com.apple.WebKit.WebContent.Development+0x100001f73)
#63 0x7fff8ab8d5ac in start (/usr/lib/system/libdyld.dylib+0x35ac)
#64 0x0 (<unknown module>)
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV (WebKit/WebKitBuild/Debug/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x2d01528) in WTFCrash
==18439==ABORTING
#CRASHED - com.apple.WebKit.WebContent.Development (pid 18439)</pre>
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