<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<!DOCTYPE bugzilla SYSTEM "https://bugs.webkit.org/page.cgi?id=bugzilla.dtd">

<bugzilla version="5.0.4.1"
          urlbase="https://bugs.webkit.org/"
          
          maintainer="admin@webkit.org"
>

    <bug>
          <bug_id>139388</bug_id>
          
          <creation_ts>2014-12-08 02:47:54 -0800</creation_ts>
          <short_desc>ASSERTION FAILED: ancestor-&gt;style().columnSpan() != ColumnSpanAll || !isValidColumnSpanner(flowThread, ancestor) in WebCore::isValidColumnSpanner</short_desc>
          <delta_ts>2016-12-06 20:07:26 -0800</delta_ts>
          <reporter_accessible>1</reporter_accessible>
          <cclist_accessible>1</cclist_accessible>
          <classification_id>1</classification_id>
          <classification>Unclassified</classification>
          <product>WebKit</product>
          <component>Tables</component>
          <version>528+ (Nightly build)</version>
          <rep_platform>Unspecified</rep_platform>
          <op_sys>Unspecified</op_sys>
          <bug_status>RESOLVED</bug_status>
          <resolution>CONFIGURATION CHANGED</resolution>
          
          
          <bug_file_loc></bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords>InRadar</keywords>
          <priority>P2</priority>
          <bug_severity>Normal</bug_severity>
          <target_milestone>---</target_milestone>
          
          <blocked>116980</blocked>
          <everconfirmed>1</everconfirmed>
          <reporter name="Renata Hodovan">rhodovan.u-szeged</reporter>
          <assigned_to name="Nobody">webkit-unassigned</assigned_to>
          <cc>bfulgham</cc>
    
    <cc>hyatt</cc>
    
    <cc>mstensho</cc>
    
    <cc>webkit-bug-importer</cc>
    
    <cc>zalan</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>1053336</commentid>
    <comment_count>0</comment_count>
      <attachid>242794</attachid>
    <who name="Renata Hodovan">rhodovan.u-szeged</who>
    <bug_when>2014-12-08 02:47:54 -0800</bug_when>
    <thetext>Created attachment 242794
Test case

Load this test with debug WebKit:

&lt;!DOCTYPE html&gt;
&lt;style&gt;
* {
    display: table-caption;
    -webkit-columns: 5418in;
    column-span: all;
}
&lt;/style&gt;
&lt;summary&gt;
    &lt;video&gt;
        &lt;object&gt;
            &lt;video controls&gt;
        &lt;/object&gt;
    &lt;/video&gt;
&lt;/summary&gt;


Backtrace:

ASSERTION FAILED: ancestor-&gt;style().columnSpan() != ColumnSpanAll || !isValidColumnSpanner(flowThread, ancestor)
../../Source/WebCore/rendering/RenderMultiColumnFlowThread.cpp(271) : bool WebCore::isValidColumnSpanner(WebCore::RenderMultiColumnFlowThread*, WebCore::RenderObject*)

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fff98927700 (LWP 17653)]
0x00007fffedbca36f in WTFCrash () at ../../Source/WTF/wtf/Assertions.cpp:321
321	    *(int *)(uintptr_t)0xbbadbeef = 0;
#0  0x00007fffedbca36f in WTFCrash () at ../../Source/WTF/wtf/Assertions.cpp:321
#1  0x00007ffff3aa41bc in WebCore::isValidColumnSpanner (flowThread=0x91d6a0, descendant=0x8b0d10) at ../../Source/WebCore/rendering/RenderMultiColumnFlowThread.cpp:271
#2  0x00007ffff3aa4297 in WebCore::RenderMultiColumnFlowThread::processPossibleSpannerDescendant (this=0x91d6a0, subtreeRoot=@0x7fffffffc818: 0x8b0d10, descendant=0x8b0d10) at ../../Source/WebCore/rendering/RenderMultiColumnFlowThread.cpp:286
#3  0x00007ffff3aa488f in WebCore::RenderMultiColumnFlowThread::flowThreadDescendantInserted (this=0x91d6a0, descendant=0x8b0d10) at ../../Source/WebCore/rendering/RenderMultiColumnFlowThread.cpp:400
#4  0x00007ffff3ac9cbb in WebCore::RenderObject::insertedIntoTree (this=0x8b0d10) at ../../Source/WebCore/rendering/RenderObject.cpp:1905
#5  0x00007ffff39dda91 in WebCore::RenderElement::insertedIntoTree (this=0x8b0d10) at ../../Source/WebCore/rendering/RenderElement.cpp:1022
#6  0x00007ffff39dbfe9 in WebCore::RenderElement::insertChildInternal (this=0x546c00, newChild=0x8b0d10, beforeChild=0x0, notifyChildren=WebCore::RenderElement::NotifyChildren) at ../../Source/WebCore/rendering/RenderElement.cpp:574
#7  0x00007ffff39dbb68 in WebCore::RenderElement::addChild (this=0x546c00, newChild=0x8b0d10, beforeChild=0x0) at ../../Source/WebCore/rendering/RenderElement.cpp:498
#8  0x00007ffff3932bb3 in WebCore::RenderBlock::addChildIgnoringContinuation (this=0x546c00, newChild=0x8b0d10, beforeChild=0x0) at ../../Source/WebCore/rendering/RenderBlock.cpp:494
#9  0x00007ffff3932696 in WebCore::RenderBlock::addChild (this=0x546c00, newChild=0x8b0d10, beforeChild=0x0) at ../../Source/WebCore/rendering/RenderBlock.cpp:409
#10 0x00007ffff396e5cf in WebCore::RenderBlockFlow::addChild (this=0x546c00, newChild=0x8b0d10, beforeChild=0x0) at ../../Source/WebCore/rendering/RenderBlockFlow.cpp:3706
#11 0x00007ffff3c37f10 in WebCore::Style::RenderTreePosition::insert (this=0x7fffffffcb20, renderer=...) at ../../Source/WebCore/style/StyleResolveTree.cpp:222
#12 0x00007ffff3c386c7 in WebCore::Style::createRendererIfNeeded (element=..., inheritedStyle=..., renderTreePosition=..., resolvedStyle=...) at ../../Source/WebCore/style/StyleResolveTree.cpp:334
#13 0x00007ffff3c39a57 in WebCore::Style::attachRenderTree (current=..., inheritedStyle=..., renderTreePosition=..., resolvedStyle=...) at ../../Source/WebCore/style/StyleResolveTree.cpp:615
#14 0x00007ffff3c3924f in WebCore::Style::attachDistributedChildren (insertionPoint=..., inheritedStyle=..., renderTreePosition=...) at ../../Source/WebCore/style/StyleResolveTree.cpp:506
#15 0x00007ffff3c399e1 in WebCore::Style::attachRenderTree (current=..., inheritedStyle=..., renderTreePosition=..., resolvedStyle=...) at ../../Source/WebCore/style/StyleResolveTree.cpp:606
#16 0x00007ffff3c390d1 in WebCore::Style::attachChildren (current=..., inheritedStyle=..., renderTreePosition=...) at ../../Source/WebCore/style/StyleResolveTree.cpp:484
#17 0x00007ffff3c39395 in WebCore::Style::attachShadowRoot (shadowRoot=...) at ../../Source/WebCore/style/StyleResolveTree.cpp:521
#18 0x00007ffff3c39ae8 in WebCore::Style::attachRenderTree (current=..., inheritedStyle=..., renderTreePosition=..., resolvedStyle=...) at ../../Source/WebCore/style/StyleResolveTree.cpp:625
#19 0x00007ffff3c3a378 in WebCore::Style::resolveLocal (current=..., inheritedStyle=..., renderTreePosition=..., inheritedChange=WebCore::Style::NoChange) at ../../Source/WebCore/style/StyleResolveTree.cpp:756
#20 0x00007ffff3c3ab2f in WebCore::Style::resolveTree (current=..., inheritedStyle=..., renderTreePosition=..., change=WebCore::Style::NoChange) at ../../Source/WebCore/style/StyleResolveTree.cpp:918
#21 0x00007ffff3c3ad9e in WebCore::Style::resolveTree (current=..., inheritedStyle=..., renderTreePosition=..., change=WebCore::Style::NoChange) at ../../Source/WebCore/style/StyleResolveTree.cpp:955
#22 0x00007ffff3c3ad9e in WebCore::Style::resolveTree (current=..., inheritedStyle=..., renderTreePosition=..., change=WebCore::Style::NoChange) at ../../Source/WebCore/style/StyleResolveTree.cpp:955
#23 0x00007ffff3c3b099 in WebCore::Style::resolveTree (document=..., change=WebCore::Style::NoChange) at ../../Source/WebCore/style/StyleResolveTree.cpp:997
#24 0x00007ffff30657ff in WebCore::Document::recalcStyle (this=0x6d4b10, change=WebCore::Style::NoChange) at ../../Source/WebCore/dom/Document.cpp:1796
#25 0x00007ffff3065b0a in WebCore::Document::updateStyleIfNeeded (this=0x6d4b10) at ../../Source/WebCore/dom/Document.cpp:1841
#26 0x00007ffff3070c7d in WebCore::Document::finishedParsing (this=0x6d4b10) at ../../Source/WebCore/dom/Document.cpp:4613
#27 0x00007ffff33c6039 in WebCore::HTMLConstructionSite::finishedParsing (this=0x76c858) at ../../Source/WebCore/html/parser/HTMLConstructionSite.cpp:395
#28 0x00007ffff3403a33 in WebCore::HTMLTreeBuilder::finished (this=0x76c840) at ../../Source/WebCore/html/parser/HTMLTreeBuilder.cpp:3009
#29 0x00007ffff33ced4e in WebCore::HTMLDocumentParser::end (this=0x68aba0) at ../../Source/WebCore/html/parser/HTMLDocumentParser.cpp:439
#30 0x00007ffff33cee39 in WebCore::HTMLDocumentParser::attemptToRunDeferredScriptsAndEnd (this=0x68aba0) at ../../Source/WebCore/html/parser/HTMLDocumentParser.cpp:450
#31 0x00007ffff33cd8e7 in WebCore::HTMLDocumentParser::prepareToStopParsing (this=0x68aba0) at ../../Source/WebCore/html/parser/HTMLDocumentParser.cpp:165
#32 0x00007ffff33cee7c in WebCore::HTMLDocumentParser::attemptToEnd (this=0x68aba0) at ../../Source/WebCore/html/parser/HTMLDocumentParser.cpp:462
#33 0x00007ffff33cef33 in WebCore::HTMLDocumentParser::finish (this=0x68aba0) at ../../Source/WebCore/html/parser/HTMLDocumentParser.cpp:490
#34 0x00007ffff3538b7f in WebCore::DocumentWriter::end (this=0x73f1d0) at ../../Source/WebCore/loader/DocumentWriter.cpp:246
#35 0x00007ffff35248db in WebCore::DocumentLoader::finishedLoading (this=0x73f130, finishTime=0) at ../../Source/WebCore/loader/DocumentLoader.cpp:440
#36 0x00007ffff3524644 in WebCore::DocumentLoader::notifyFinished (this=0x73f130, resource=0x8d51d0) at ../../Source/WebCore/loader/DocumentLoader.cpp:374
#37 0x00007ffff35d5370 in WebCore::CachedResource::checkNotify (this=0x8d51d0) at ../../Source/WebCore/loader/cache/CachedResource.cpp:293
#38 0x00007ffff35d546e in WebCore::CachedResource::finishLoading (this=0x8d51d0) at ../../Source/WebCore/loader/cache/CachedResource.cpp:309
#39 0x00007ffff35d1b63 in WebCore::CachedRawResource::finishLoading (this=0x8d51d0, data=0x6559f0) at ../../Source/WebCore/loader/cache/CachedRawResource.cpp:104
#40 0x00007ffff358594c in WebCore::SubresourceLoader::didFinishLoading (this=0x8d1140, finishTime=0) at ../../Source/WebCore/loader/SubresourceLoader.cpp:306
#41 0x00007ffff35816e1 in WebCore::ResourceLoader::didFinishLoading (this=0x8d1140, finishTime=0) at ../../Source/WebCore/loader/ResourceLoader.cpp:508
#42 0x00007ffff3f303e1 in WebCore::readCallback (asyncResult=0x7111f0, data=0x8d17a0) at ../../Source/WebCore/platform/network/soup/ResourceHandleSoup.cpp:1300
#43 0x00007fffeb7ab7d6 in async_ready_callback_wrapper (source_object=0x7c66d0, res=0x7111f0, user_data=user_data@entry=0x8d17a0) at ginputstream.c:523
#44 0x00007fffeb7d10d5 in g_task_return_now (task=0x7111f0) at gtask.c:1077
#45 0x00007fffeb7d10f9 in complete_in_idle_cb (task=0x7111f0) at gtask.c:1086
#46 0x00007fffeaa10a1d in g_main_dispatch (context=0x478020) at gmain.c:3064
#47 g_main_context_dispatch (context=context@entry=0x478020) at gmain.c:3663
#48 0x00007fffeaa10d88 in g_main_context_iterate (context=0x478020, block=block@entry=1, dispatch=dispatch@entry=1, self=&lt;optimized out&gt;) at gmain.c:3734
#49 0x00007fffeaa1104a in g_main_loop_run (loop=0x901620) at gmain.c:3928
#50 0x00007ffff45df9dc in WTF::RunLoop::run () at ../../Source/WTF/wtf/gtk/RunLoopGtk.cpp:59
#51 0x00007ffff2b44f82 in WebKit::ChildProcessMain&lt;WebKit::WebProcess, WebKit::WebProcessMain&gt; (argc=2, argv=0x7fffffffd978) at ../../Source/WebKit2/Shared/unix/ChildProcessMain.h:61
#52 0x00007ffff2b44de7 in WebKit::WebProcessMainUnix (argc=2, argv=0x7fffffffd978) at ../../Source/WebKit2/WebProcess/gtk/WebProcessMainGtk.cpp:73
#53 0x0000000000400891 in main (argc=2, argv=0x7fffffffd978) at ../../Source/WebKit2/WebProcess/EntryPoint/unix/WebProcessMain.cpp:44</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1217477</commentid>
    <comment_count>1</comment_count>
    <who name="Brent Fulgham">bfulgham</who>
    <bug_when>2016-08-04 10:51:11 -0700</bug_when>
    <thetext>This reproduces under r204037.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1217478</commentid>
    <comment_count>2</comment_count>
    <who name="Radar WebKit Bug Importer">webkit-bug-importer</who>
    <bug_when>2016-08-04 10:51:22 -0700</bug_when>
    <thetext>&lt;rdar://problem/27702722&gt;</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1257156</commentid>
    <comment_count>3</comment_count>
    <who name="alan">zalan</who>
    <bug_when>2016-12-06 20:07:26 -0800</bug_when>
    <thetext>I can’t reproduce this with r209438.</thetext>
  </long_desc>
      
          <attachment
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            <attachid>242794</attachid>
            <date>2014-12-08 02:47:54 -0800</date>
            <delta_ts>2014-12-08 02:47:54 -0800</delta_ts>
            <desc>Test case</desc>
            <filename>crash.html</filename>
            <type>text/html</type>
            <size>227</size>
            <attacher name="Renata Hodovan">rhodovan.u-szeged</attacher>
            
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</bugzilla>