Bug 135664 – ASSERTION FAILED: m_flowThread->objectShouldFragmentInFlowRegion(box, this) in WebCore::RenderRegion::ensureOverflowForBox

• Status: RESOLVED
• Resolution: WORKSFORME
• Component: Layout and Rendering

[Renata Hodovan]

Created attachment 236124 [details]
Test case

The failing test:

<style>
* {
    -webkit-column-count:2;
}
</style>

<li></li>
<audio controls></audio>

<style>
body {
    -webkit-column-count:auto;
}
</style>


The backtrace:

ASSERTION FAILED: m_flowThread->objectShouldFragmentInFlowRegion(box, this)
../../Source/WebCore/rendering/RenderRegion.cpp(447) : void WebCore::RenderRegion::ensureOverflowForBox(const WebCore::RenderBox*, WTF::RefPtr<WebCore::RenderOverflow>&, bool)

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fff97334700 (LWP 22285)]
0x00007ffff301845c in WTFCrash () at ../../Source/WTF/wtf/Assertions.cpp:329
329	    *(int *)(uintptr_t)0xbbadbeef = 0;
#0  0x00007ffff301845c in WTFCrash () at ../../Source/WTF/wtf/Assertions.cpp:329
#1  0x00007ffff3ed1434 in WebCore::RenderRegion::ensureOverflowForBox (this=0xa39700, box=0x8cadd0, overflow=..., forceCreation=true) at ../../Source/WebCore/rendering/RenderRegion.cpp:447
#2  0x00007ffff3ed1ac4 in WebCore::RenderRegion::visualOverflowRectForBox (this=0xa39700, box=0x8cadd0) at ../../Source/WebCore/rendering/RenderRegion.cpp:537
#3  0x00007ffff3ecfd6c in WebCore::RenderRegion::overflowRectForFlowThreadPortion (this=0xa39700, flowThreadPortionRect=..., isFirstPortion=true, isLastPortion=true, overflowType=WebCore::RenderRegion::VisualOverflow) at ../../Source/WebCore/rendering/RenderRegion.cpp:159
#4  0x00007ffff3ecfbf7 in WebCore::RenderRegion::flowThreadPortionOverflowRect (this=0xa39700) at ../../Source/WebCore/rendering/RenderRegion.cpp:134
#5  0x00007ffff3ead4ac in WebCore::RenderMultiColumnSet::collectLayerFragments (this=0xa39700, fragments=..., layerBoundingBox=..., dirtyRect=...) at ../../Source/WebCore/rendering/RenderMultiColumnSet.cpp:741
#6  0x00007ffff3e0aac7 in WebCore::RenderFlowThread::fragmentsBoundingBox (this=0x8cadd0, layerBoundingBox=...) at ../../Source/WebCore/rendering/RenderFlowThread.cpp:1158
#7  0x00007ffff3e54a7c in WebCore::RenderLayer::collectFragments (this=0xa59530, fragments=..., rootLayer=0x91f200, dirtyRect=..., inclusionMode=WebCore::RenderLayer::ExcludeCompositedPaginatedLayers, clipRectsType=WebCore::PaintingClipRects, inOverlayScrollbarSizeRelevancy=WebCore::IgnoreOverlayScrollbarSize, respectOverflowClip=WebCore::RespectOverflowClip, offsetFromRoot=..., layerBoundingBox=0x0, applyRootOffsetToFragments=WebCore::IgnoreRootOffsetForFragments) at ../../Source/WebCore/rendering/RenderLayer.cpp:4250
#8  0x00007ffff3e53dba in WebCore::RenderLayer::paintLayerContents (this=0xa59530, context=0xabea60, paintingInfo=..., paintFlags=224) at ../../Source/WebCore/rendering/RenderLayer.cpp:4072
#9  0x00007ffff3e52bf6 in WebCore::RenderLayer::paintLayerContentsAndReflection (this=0xa59530, context=0xabea60, paintingInfo=..., paintFlags=224) at ../../Source/WebCore/rendering/RenderLayer.cpp:3773
#10 0x00007ffff3e52ac9 in WebCore::RenderLayer::paintLayer (this=0xa59530, context=0xabea60, paintingInfo=..., paintFlags=224) at ../../Source/WebCore/rendering/RenderLayer.cpp:3755
#11 0x00007ffff3e5469a in WebCore::RenderLayer::paintList (this=0x8cbae0, list=0x8a3900, context=0xabea60, paintingInfo=..., paintFlags=224) at ../../Source/WebCore/rendering/RenderLayer.cpp:4186
#12 0x00007ffff3e53fe0 in WebCore::RenderLayer::paintLayerContents (this=0x8cbae0, context=0xabea60, paintingInfo=..., paintFlags=224) at ../../Source/WebCore/rendering/RenderLayer.cpp:4098
#13 0x00007ffff3e52bf6 in WebCore::RenderLayer::paintLayerContentsAndReflection (this=0x8cbae0, context=0xabea60, paintingInfo=..., paintFlags=224) at ../../Source/WebCore/rendering/RenderLayer.cpp:3773
#14 0x00007ffff3e52ac9 in WebCore::RenderLayer::paintLayer (this=0x8cbae0, context=0xabea60, paintingInfo=..., paintFlags=224) at ../../Source/WebCore/rendering/RenderLayer.cpp:3755
#15 0x00007ffff3e5469a in WebCore::RenderLayer::paintList (this=0x9dba30, list=0x9e7150, context=0xabea60, paintingInfo=..., paintFlags=224) at ../../Source/WebCore/rendering/RenderLayer.cpp:4186
#16 0x00007ffff3e53fe0 in WebCore::RenderLayer::paintLayerContents (this=0x9dba30, context=0xabea60, paintingInfo=..., paintFlags=224) at ../../Source/WebCore/rendering/RenderLayer.cpp:4098
#17 0x00007ffff3e52bf6 in WebCore::RenderLayer::paintLayerContentsAndReflection (this=0x9dba30, context=0xabea60, paintingInfo=..., paintFlags=224) at ../../Source/WebCore/rendering/RenderLayer.cpp:3773
#18 0x00007ffff3e52ac9 in WebCore::RenderLayer::paintLayer (this=0x9dba30, context=0xabea60, paintingInfo=..., paintFlags=224) at ../../Source/WebCore/rendering/RenderLayer.cpp:3755
#19 0x00007ffff3e5469a in WebCore::RenderLayer::paintList (this=0xa16860, list=0x93f670, context=0xabea60, paintingInfo=..., paintFlags=224) at ../../Source/WebCore/rendering/RenderLayer.cpp:4186
#20 0x00007ffff3e53fe0 in WebCore::RenderLayer::paintLayerContents (this=0xa16860, context=0xabea60, paintingInfo=..., paintFlags=224) at ../../Source/WebCore/rendering/RenderLayer.cpp:4098
#21 0x00007ffff3e52bf6 in WebCore::RenderLayer::paintLayerContentsAndReflection (this=0xa16860, context=0xabea60, paintingInfo=..., paintFlags=224) at ../../Source/WebCore/rendering/RenderLayer.cpp:3773
#22 0x00007ffff3e52ac9 in WebCore::RenderLayer::paintLayer (this=0xa16860, context=0xabea60, paintingInfo=..., paintFlags=224) at ../../Source/WebCore/rendering/RenderLayer.cpp:3755
#23 0x00007ffff3e5469a in WebCore::RenderLayer::paintList (this=0x91f200, list=0xaa4b30, context=0xabea60, paintingInfo=..., paintFlags=224) at ../../Source/WebCore/rendering/RenderLayer.cpp:4186
#24 0x00007ffff3e53fe0 in WebCore::RenderLayer::paintLayerContents (this=0x91f200, context=0xabea60, paintingInfo=..., paintFlags=224) at ../../Source/WebCore/rendering/RenderLayer.cpp:4098
#25 0x00007ffff3e52bf6 in WebCore::RenderLayer::paintLayerContentsAndReflection (this=0x91f200, context=0xabea60, paintingInfo=..., paintFlags=0) at ../../Source/WebCore/rendering/RenderLayer.cpp:3773
#26 0x00007ffff3e52ac9 in WebCore::RenderLayer::paintLayer (this=0x91f200, context=0xabea60, paintingInfo=..., paintFlags=0) at ../../Source/WebCore/rendering/RenderLayer.cpp:3755
#27 0x00007ffff3e51ba6 in WebCore::RenderLayer::paint (this=0x91f200, context=0xabea60, damageRect=..., subpixelAccumulation=..., paintBehavior=0, subtreePaintRoot=0x0, paintFlags=0) at ../../Source/WebCore/rendering/RenderLayer.cpp:3554
#28 0x00007ffff3ad6912 in WebCore::FrameView::paintContents (this=0x8ba230, context=0xabea60, dirtyRect=...) at ../../Source/WebCore/page/FrameView.cpp:3693
#29 0x00007ffff3b840fa in WebCore::ScrollView::paint (this=0x8ba230, context=0xabea60, rect=...) at ../../Source/WebCore/platform/ScrollView.cpp:1203
#30 0x00007ffff2eca1f4 in WebKit::WebPage::drawRect (this=0x815480, graphicsContext=..., rect=...) at ../../Source/WebKit2/WebProcess/WebPage/WebPage.cpp:1292
#31 0x00007ffff2f96a6e in WebKit::DrawingAreaImpl::display (this=0x91db90, updateInfo=...) at ../../Source/WebKit2/WebProcess/WebPage/DrawingAreaImpl.cpp:664
#32 0x00007ffff2f9632a in WebKit::DrawingAreaImpl::display (this=0x91db90) at ../../Source/WebKit2/WebProcess/WebPage/DrawingAreaImpl.cpp:580
#33 0x00007ffff2f961e8 in WebKit::DrawingAreaImpl::displayTimerFired (this=0x91db90) at ../../Source/WebKit2/WebProcess/WebPage/DrawingAreaImpl.cpp:559
#34 0x00007ffff2f98441 in WTF::RunLoop::Timer<WebKit::DrawingAreaImpl>::fired (this=0x91dd88) at ../../Source/WTF/wtf/RunLoop.h:120
#35 0x00007ffff3069865 in WTF::RunLoop::TimerBase::__lambda1::operator() (__closure=0x76ab90) at ../../Source/WTF/wtf/gtk/RunLoopGtk.cpp:121
#36 0x00007ffff3069c4c in std::_Function_handler<bool(), WTF::RunLoop::TimerBase::start(double, bool)::__lambda1>::_M_invoke(const std::_Any_data &) (__functor=...) at /usr/include/c++/4.8/functional:2057
#37 0x00007ffff3068828 in std::function<bool ()>::operator()() const (this=0x91ddd0) at /usr/include/c++/4.8/functional:2464
#38 0x00007ffff30680bc in WTF::GMainLoopSource::boolCallback (this=0x91dd98) at ../../Source/WTF/wtf/gobject/GMainLoopSource.cpp:210
#39 0x00007ffff306835a in WTF::GMainLoopSource::boolSourceCallback (source=0x91dd98, source@entry=<error reading variable: value has been optimized out>) at ../../Source/WTF/wtf/gobject/GMainLoopSource.cpp:261
#40 0x00007fffeb440e43 in g_timeout_dispatch (source=source@entry=0xa15550, callback=<optimized out>, user_data=<optimized out>) at gmain.c:4450
#41 0x00007fffeb4402e6 in g_main_dispatch (context=0x677bc0) at gmain.c:3065
#42 g_main_context_dispatch (context=context@entry=0x677bc0) at gmain.c:3641
#43 0x00007fffeb440638 in g_main_context_iterate (context=0x677bc0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3712
#44 0x00007fffeb440a3a in g_main_loop_run (loop=0x709730) at gmain.c:3906
#45 0x00007ffff30693ea in WTF::RunLoop::run () at ../../Source/WTF/wtf/gtk/RunLoopGtk.cpp:59
#46 0x00007ffff2fa2874 in WebKit::ChildProcessMain<WebKit::WebProcess, WebKit::WebProcessMain> (argc=2, argv=0x7fffffffda58) at ../../Source/WebKit2/Shared/unix/ChildProcessMain.h:61
#47 0x00007ffff2fa26d9 in WebKit::WebProcessMainUnix (argc=2, argv=0x7fffffffda58) at ../../Source/WebKit2/WebProcess/gtk/WebProcessMainGtk.cpp:73
#48 0x000000000040085d in main (argc=2, argv=0x7fffffffda58) at ../../Source/WebKit2/WebProcess/EntryPoint/unix/WebProcessMain.cpp:32

[Brent Fulgham]

This issue no longer occurs under GuardMalloc or ASAN as of r204037. If you believe there is still a bug, please reopen this issue with a revised test case.