<html>
    <head>
      <base href="https://bugs.webkit.org/" />
    </head>
    <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: !object || !isRuby(object-&gt;parent()) || is&lt;RenderRubyRun&gt;(*object) || (object-&gt;isInline() &amp;&amp; (object-&gt;isBeforeContent() || object-&gt;isAfterContent())) || ... in WebCore::isAnonymousRubyInlineBlock"
   href="https://bugs.webkit.org/show_bug.cgi?id=169752">169752</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>ASSERTION FAILED: !object || !isRuby(object-&gt;parent()) || is&lt;RenderRubyRun&gt;(*object) || (object-&gt;isInline() &amp;&amp; (object-&gt;isBeforeContent() || object-&gt;isAfterContent())) || ... in WebCore::isAnonymousRubyInlineBlock
          </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&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>hodovan&#64;inf.u-szeged.hu
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>bfulgham&#64;webkit.org, simon.fraser&#64;apple.com, zalan&#64;apple.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=304639" name="attach_304639" title="Test">attachment 304639</a> <a href="attachment.cgi?id=304639&amp;action=edit" title="Test">[details]</a></span>
Test

Load the attached test with debug WebKitTestRunner:

Checked version: c9b0459
OS: macOS Sierra (10.12.3)

&lt;style&gt;
* {
    -webkit-column-width: 5em;
    -webkit-appearance: square-button
}
&lt;/style&gt;
&lt;ruby&gt;
    &lt;audio controls&gt;&lt;/audio&gt;
&lt;/ruby&gt;

Backtrace:

ASSERTION FAILED: !object || !isRuby(object-&gt;parent()) || is&lt;RenderRubyRun&gt;(*object) || (object-&gt;isInline() &amp;&amp; (object-&gt;isBeforeContent() || object-&gt;isAfterContent())) || (object-&gt;isAnonymous() &amp;&amp; is&lt;RenderBlock&gt;(*object) &amp;&amp; object-&gt;style().display() == INLINE_BLOCK)
WebKit/Source/WebCore/rendering/RenderRuby.cpp(51) : bool WebCore::isAnonymousRubyInlineBlock(const WebCore::RenderObject *)
1   0x127f97521 WTFCrash
2   0x10f63656d WebCore::isAnonymousRubyInlineBlock(WebCore::RenderObject const*)
3   0x10f637225 WebCore::isRubyBeforeBlock(WebCore::RenderObject const*)
4   0x10f635fa2 WebCore::rubyBeforeBlock(WebCore::RenderElement const*)
5   0x10f6362a5 WebCore::lastRubyRun(WebCore::RenderElement const*)
6   0x10f636f2d WebCore::RenderRubyAsBlock::addChild(WebCore::RenderObject*, WebCore::RenderObject*)
7   0x10f94a843 WebCore::RenderTreePosition::insert(WebCore::RenderObject&amp;)
8   0x10f948f69 WebCore::RenderTreeUpdater::createRenderer(WebCore::Element&amp;, WebCore::RenderStyle&amp;&amp;)
9   0x10f946620 WebCore::RenderTreeUpdater::updateElementRenderer(WebCore::Element&amp;, WebCore::Style::ElementUpdate const&amp;)
10  0x10f945b93 WebCore::RenderTreeUpdater::updateRenderTree(WebCore::ContainerNode&amp;)
11  0x10f9449bf WebCore::RenderTreeUpdater::commit(std::__1::unique_ptr&lt;WebCore::Style::Update const, std::__1::default_delete&lt;WebCore::Style::Update const&gt; &gt;)
12  0x10a9ca541 WebCore::Document::resolveStyle(WebCore::Document::ResolveStyleType)
13  0x10a9af6bb WebCore::Document::updateStyleIfNeeded()
14  0x10a9fbb7d WebCore::Document::finishedParsing()
15  0x10b7b8c06 WebCore::HTMLConstructionSite::finishedParsing()
16  0x10bad9d28 WebCore::HTMLTreeBuilder::finished()
17  0x10b8339ac WebCore::HTMLDocumentParser::end()
18  0x10b82e137 WebCore::HTMLDocumentParser::attemptToRunDeferredScriptsAndEnd()
19  0x10b82dcee WebCore::HTMLDocumentParser::prepareToStopParsing()
20  0x10b833acc WebCore::HTMLDocumentParser::attemptToEnd()
21  0x10b833c08 WebCore::HTMLDocumentParser::finish()
22  0x10abc9d00 WebCore::DocumentWriter::end()
23  0x10ab10777 WebCore::DocumentLoader::finishedLoading()
24  0x10ab10173 WebCore::DocumentLoader::notifyFinished(WebCore::CachedResource&amp;)
25  0x109e34274 WebCore::CachedResource::checkNotify()
26  0x109e34904 WebCore::CachedResource::finishLoading(WebCore::SharedBuffer*)
27  0x109e26199 WebCore::CachedRawResource::finishLoading(WebCore::SharedBuffer*)
28  0x1103ad4ca WebCore::SubresourceLoader::didFinishLoading(WebCore::NetworkLoadMetrics const&amp;)
29  0x105c4cac6 WebKit::WebResourceLoader::didFinishResourceLoad(WebCore::NetworkLoadMetrics const&amp;)
30  0x105c5c98a void IPC::callMemberFunctionImpl&lt;WebKit::WebResourceLoader, void (WebKit::WebResourceLoader::*)(WebCore::NetworkLoadMetrics const&amp;), std::__1::tuple&lt;WebCore::NetworkLoadMetrics&gt;, 0ul&gt;(WebKit::WebResourceLoader*, void (WebKit::WebResourceLoader::*)(WebCore::NetworkLoadMetrics const&amp;), std::__1::tuple&lt;WebCore::NetworkLoadMetrics&gt;&amp;&amp;, std::__1::integer_sequence&lt;unsigned long, 0ul&gt;)
31  0x105c5c595 void IPC::callMemberFunction&lt;WebKit::WebResourceLoader, void (WebKit::WebResourceLoader::*)(WebCore::NetworkLoadMetrics const&amp;), std::__1::tuple&lt;WebCore::NetworkLoadMetrics&gt;, std::__1::integer_sequence&lt;unsigned long, 0ul&gt; &gt;(std::__1::tuple&lt;WebCore::NetworkLoadMetrics&gt;&amp;&amp;, WebKit::WebResourceLoader*, void (WebKit::WebResourceLoader::*)(WebCore::NetworkLoadMetrics const&amp;))
ASAN:DEADLYSIGNAL
=================================================================
==42167==ERROR: AddressSanitizer: SEGV on unknown address 0x0000bbadbeef (pc 0x000127f97559 bp 0x7fff5e7a3940 sp 0x7fff5e7a3930 T0)
    #0 0x127f97558 in WTFCrash (WebKit/WebKitBuild/Debug/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x36db558)
    #1 0x10f63656c in WebCore::isAnonymousRubyInlineBlock(WebCore::RenderObject const*) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x5e1a56c)
    #2 0x10f637224 in WebCore::isRubyBeforeBlock(WebCore::RenderObject const*) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x5e1b224)
    #3 0x10f635fa1 in WebCore::rubyBeforeBlock(WebCore::RenderElement const*) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x5e19fa1)
    #4 0x10f6362a4 in WebCore::lastRubyRun(WebCore::RenderElement const*) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x5e1a2a4)
    #5 0x10f636f2c in WebCore::RenderRubyAsBlock::addChild(WebCore::RenderObject*, WebCore::RenderObject*) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x5e1af2c)
    #6 0x10f94a842 in WebCore::RenderTreePosition::insert(WebCore::RenderObject&amp;) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x612e842)
    #7 0x10f948f68 in WebCore::RenderTreeUpdater::createRenderer(WebCore::Element&amp;, WebCore::RenderStyle&amp;&amp;) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x612cf68)
    #8 0x10f94661f in WebCore::RenderTreeUpdater::updateElementRenderer(WebCore::Element&amp;, WebCore::Style::ElementUpdate const&amp;) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x612a61f)
    #9 0x10f945b92 in WebCore::RenderTreeUpdater::updateRenderTree(WebCore::ContainerNode&amp;) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x6129b92)
    #10 0x10f9449be in WebCore::RenderTreeUpdater::commit(std::__1::unique_ptr&lt;WebCore::Style::Update const, std::__1::default_delete&lt;WebCore::Style::Update const&gt; &gt;) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x61289be)
    #11 0x10a9ca540 in WebCore::Document::resolveStyle(WebCore::Document::ResolveStyleType) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x11ae540)
    #12 0x10a9af6ba in WebCore::Document::updateStyleIfNeeded() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x11936ba)
    #13 0x10a9fbb7c in WebCore::Document::finishedParsing() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x11dfb7c)
    #14 0x10b7b8c05 in WebCore::HTMLConstructionSite::finishedParsing() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x1f9cc05)
    #15 0x10bad9d27 in WebCore::HTMLTreeBuilder::finished() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x22bdd27)
    #16 0x10b8339ab in WebCore::HTMLDocumentParser::end() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x20179ab)
    #17 0x10b82e136 in WebCore::HTMLDocumentParser::attemptToRunDeferredScriptsAndEnd() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x2012136)
    #18 0x10b82dced in WebCore::HTMLDocumentParser::prepareToStopParsing() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x2011ced)
    #19 0x10b833acb in WebCore::HTMLDocumentParser::attemptToEnd() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x2017acb)
    #20 0x10b833c07 in WebCore::HTMLDocumentParser::finish() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x2017c07)
    #21 0x10abc9cff in WebCore::DocumentWriter::end() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x13adcff)
    #22 0x10ab10776 in WebCore::DocumentLoader::finishedLoading() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x12f4776)
    #23 0x10ab10172 in WebCore::DocumentLoader::notifyFinished(WebCore::CachedResource&amp;) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x12f4172)
    #24 0x109e34273 in WebCore::CachedResource::checkNotify() (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x618273)
    #25 0x109e34903 in WebCore::CachedResource::finishLoading(WebCore::SharedBuffer*) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x618903)
    #26 0x109e26198 in WebCore::CachedRawResource::finishLoading(WebCore::SharedBuffer*) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x60a198)
    #27 0x1103ad4c9 in WebCore::SubresourceLoader::didFinishLoading(WebCore::NetworkLoadMetrics const&amp;) (WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore+0x6b914c9)
    #28 0x105c4cac5 in WebKit::WebResourceLoader::didFinishResourceLoad(WebCore::NetworkLoadMetrics const&amp;) (WebKit/WebKitBuild/Debug/WebKit.framework/Versions/A/WebKit+0x1f14ac5)
    #29 0x105c5c989 in void IPC::callMemberFunctionImpl&lt;WebKit::WebResourceLoader, void (WebKit::WebResourceLoader::*)(WebCore::NetworkLoadMetrics const&amp;), std::__1::tuple&lt;WebCore::NetworkLoadMetrics&gt;, 0ul&gt;(WebKit::WebResourceLoader*, void (WebKit::WebResourceLoader::*)(WebCore::NetworkLoadMetrics const&amp;), std::__1::tuple&lt;WebCore::NetworkLoadMetrics&gt;&amp;&amp;, std::__1::integer_sequence&lt;unsigned long, 0ul&gt;) (WebKit/WebKitBuild/Debug/WebKit.framework/Versions/A/WebKit+0x1f24989)
    #30 0x105c5c594 in void IPC::callMemberFunction&lt;WebKit::WebResourceLoader, void (WebKit::WebResourceLoader::*)(WebCore::NetworkLoadMetrics const&amp;), std::__1::tuple&lt;WebCore::NetworkLoadMetrics&gt;, std::__1::integer_sequence&lt;unsigned long, 0ul&gt; &gt;(std::__1::tuple&lt;WebCore::NetworkLoadMetrics&gt;&amp;&amp;, WebKit::WebResourceLoader*, void (WebKit::WebResourceLoader::*)(WebCore::NetworkLoadMetrics const&amp;)) (WebKit/WebKitBuild/Debug/WebKit.framework/Versions/A/WebKit+0x1f24594)
    #31 0x105c59648 in void IPC::handleMessage&lt;Messages::WebResourceLoader::DidFinishResourceLoad, WebKit::WebResourceLoader, void (WebKit::WebResourceLoader::*)(WebCore::NetworkLoadMetrics const&amp;)&gt;(IPC::Decoder&amp;, WebKit::WebResourceLoader*, void (WebKit::WebResourceLoader::*)(WebCore::NetworkLoadMetrics const&amp;)) (WebKit/WebKitBuild/Debug/WebKit.framework/Versions/A/WebKit+0x1f21648)
    #32 0x105c577fa in WebKit::WebResourceLoader::didReceiveWebResourceLoaderMessage(IPC::Connection&amp;, IPC::Decoder&amp;) (WebKit/WebKitBuild/Debug/WebKit.framework/Versions/A/WebKit+0x1f1f7fa)
    #33 0x104650040 in WebKit::NetworkProcessConnection::didReceiveMessage(IPC::Connection&amp;, IPC::Decoder&amp;) (WebKit/WebKitBuild/Debug/WebKit.framework/Versions/A/WebKit+0x918040)
    #34 0x103f5356a in IPC::Connection::dispatchMessage(IPC::Decoder&amp;) (WebKit/WebKitBuild/Debug/WebKit.framework/Versions/A/WebKit+0x21b56a)
    #35 0x103f37b94 in IPC::Connection::dispatchMessage(std::__1::unique_ptr&lt;IPC::Decoder, std::__1::default_delete&lt;IPC::Decoder&gt; &gt;) (WebKit/WebKitBuild/Debug/WebKit.framework/Versions/A/WebKit+0x1ffb94)
    #36 0x103f54255 in IPC::Connection::dispatchOneMessage() (WebKit/WebKitBuild/Debug/WebKit.framework/Versions/A/WebKit+0x21c255)
    #37 0x103f94eac in IPC::Connection::enqueueIncomingMessage(std::__1::unique_ptr&lt;IPC::Decoder, std::__1::default_delete&lt;IPC::Decoder&gt; &gt;)::$_14::operator()() (WebKit/WebKitBuild/Debug/WebKit.framework/Versions/A/WebKit+0x25ceac)
    #38 0x103f94dd8 in WTF::Function&lt;void ()&gt;::CallableWrapper&lt;IPC::Connection::enqueueIncomingMessage(std::__1::unique_ptr&lt;IPC::Decoder, std::__1::default_delete&lt;IPC::Decoder&gt; &gt;)::$_14&gt;::call() (WebKit/WebKitBuild/Debug/WebKit.framework/Versions/A/WebKit+0x25cdd8)
    #39 0x12801b470 in WTF::Function&lt;void ()&gt;::operator()() const (WebKit/WebKitBuild/Debug/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x375f470)
    #40 0x12806a1a0 in WTF::RunLoop::performWork() (WebKit/WebKitBuild/Debug/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x37ae1a0)
    #41 0x12806b1d1 in WTF::RunLoop::performWork(void*) (WebKit/WebKitBuild/Debug/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x37af1d1)
    #42 0x7fff79d43980 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation+0xa7980)
    #43 0x7fff79d24a7c in __CFRunLoopDoSources0 (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation+0x88a7c)
    #44 0x7fff79d23f75 in __CFRunLoopRun (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation+0x87f75)
    #45 0x7fff79d23973 in CFRunLoopRunSpecific (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation+0x87973)
    #46 0x7fff792afa5b in RunCurrentEventLoopInMode (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox+0x30a5b)
    #47 0x7fff792af890 in ReceiveNextEventCommon (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox+0x30890)
    #48 0x7fff792af6c5 in _BlockUntilNextEventMatchingListInModeWithFilter (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox+0x306c5)
    #49 0x7fff778555b3 in _DPSNextEvent (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit+0x475b3)
    #50 0x7fff77fcfd6a in -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit+0x7c1d6a)
    #51 0x7fff77849f34 in -[NSApplication run] (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit+0x3bf34)
    #52 0x7fff7781484f in NSApplicationMain (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit+0x684f)
    #53 0x7fff8f4df8c6 in _xpc_objc_main (/usr/lib/system/libxpc.dylib+0x108c6)
    #54 0x7fff8f4de2e3 in xpc_main (/usr/lib/system/libxpc.dylib+0xf2e3)
    #55 0x101454fb2 in main (WebKit/WebKitBuild/Debug/WebKit.framework/Versions/A/XPCServices/com.apple.WebKit.WebContent.xpc/Contents/MacOS/com.apple.WebKit.WebContent.Development+0x100001fb2)
    #56 0x7fff8f27b254 in start (/usr/lib/system/libdyld.dylib+0x5254)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV (WebKit/WebKitBuild/Debug/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x36db558) in WTFCrash
==42167==ABORTING
#CRASHED - com.apple.WebKit.WebContent.Development (pid 42167)
LEAK: 1 WebProcessPool
LEAK: 1 WebPageProxy</pre>
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