<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: y2 &gt;= y1 in WebCore::RenderElement::drawLineForBoxSide"
   href="https://bugs.webkit.org/show_bug.cgi?id=151038">151038</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>ASSERTION FAILED: y2 &gt;= y1 in WebCore::RenderElement::drawLineForBoxSide
          </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>rhodovan.u-szeged&#64;partner.samsung.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>zalan&#64;apple.com
          </td>
        </tr>

        <tr>
          <th>Blocks</th>
          <td>116980
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=265066" name="attach_265066" title="Test">attachment 265066</a> <a href="attachment.cgi?id=265066&amp;action=edit" title="Test">[details]</a></span>
Test

Load the attached test with debug MiniBrowser:

&lt;style&gt;
* {    
    vertical-align:super;
    outline-style:double;
}
&lt;/style&gt;
&lt;mark&gt;
    &lt;mark&gt;aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
        &lt;textarea&gt;&lt;/textarea&gt;aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
    &lt;/mark&gt;
&lt;/mark&gt;


OS: Ubuntu 15.04 x86_64
Checked build: debug EFL
Checked version: 009fb33


Backtrace:

ASSERTION FAILED: y2 &gt;= y1
../../Source/WebCore/rendering/RenderElement.cpp(1994) : void WebCore::RenderElement::drawLineForBoxSide(WebCore::GraphicsContext&amp;, const WebCore::FloatRect&amp;, WebCore::BoxSide, WebCore::Color, WebCore::EBorderStyle, float, float, bool) const
1   0x7feef70c3f97 WTFCrash
2   0x7feefda68a27 WebCore::RenderElement::drawLineForBoxSide(WebCore::GraphicsContext&amp;, WebCore::FloatRect const&amp;, WebCore::BoxSide, WebCore::Color, WebCore::EBorderStyle, float, float, bool) const
3   0x7feefda67c09 WebCore::RenderElement::drawLineForBoxSide(WebCore::GraphicsContext&amp;, WebCore::FloatRect const&amp;, WebCore::BoxSide, WebCore::Color, WebCore::EBorderStyle, float, float, bool) const
4   0x7feefdac3ec4 WebCore::RenderInline::paintOutlineForLine(WebCore::GraphicsContext&amp;, WebCore::LayoutPoint const&amp;, WebCore::LayoutRect const&amp;, WebCore::LayoutRect const&amp;, WebCore::LayoutRect const&amp;, WebCore::Color)
5   0x7feefdac2f01 WebCore::RenderInline::paintOutline(WebCore::PaintInfo&amp;, WebCore::LayoutPoint const&amp;)
6   0x7feefdb1f3dd WebCore::RenderLineBoxList::paint(WebCore::RenderBoxModelObject*, WebCore::PaintInfo&amp;, WebCore::LayoutPoint const&amp;) const
7   0x7feefd9f15a9 WebCore::RenderBlockFlow::paintInlineChildren(WebCore::PaintInfo&amp;, WebCore::LayoutPoint const&amp;)
8   0x7feefd9b6630 WebCore::RenderBlock::paintContents(WebCore::PaintInfo&amp;, WebCore::LayoutPoint const&amp;)
9   0x7feefd9b73b9 WebCore::RenderBlock::paintObject(WebCore::PaintInfo&amp;, WebCore::LayoutPoint const&amp;)
10  0x7feefd9b6487 WebCore::RenderBlock::paint(WebCore::PaintInfo&amp;, WebCore::LayoutPoint const&amp;)
11  0x7feefd9b6bab WebCore::RenderBlock::paintChild(WebCore::RenderBox&amp;, WebCore::PaintInfo&amp;, WebCore::LayoutPoint const&amp;, WebCore::PaintInfo&amp;, bool, WebCore::RenderBlock::PaintBlockType)
12  0x7feefd9b677d WebCore::RenderBlock::paintChildren(WebCore::PaintInfo&amp;, WebCore::LayoutPoint const&amp;, WebCore::PaintInfo&amp;, bool)
13  0x7feefd9b670a WebCore::RenderBlock::paintContents(WebCore::PaintInfo&amp;, WebCore::LayoutPoint const&amp;)
14  0x7feefd9b73b9 WebCore::RenderBlock::paintObject(WebCore::PaintInfo&amp;, WebCore::LayoutPoint const&amp;)
15  0x7feefd9b6487 WebCore::RenderBlock::paint(WebCore::PaintInfo&amp;, WebCore::LayoutPoint const&amp;)
16  0x7feefdaddae1 WebCore::RenderLayer::paintForegroundForFragmentsWithPhase(WebCore::PaintPhase, WTF::Vector&lt;WebCore::LayerFragment, 1ul, WTF::CrashOnOverflow, 16ul&gt; const&amp;, WebCore::GraphicsContext&amp;, WebCore::RenderLayer::LayerPaintingInfo const&amp;, unsigned int, WebCore::RenderObject*)
17  0x7feefdadd82a WebCore::RenderLayer::paintForegroundForFragments(WTF::Vector&lt;WebCore::LayerFragment, 1ul, WTF::CrashOnOverflow, 16ul&gt; const&amp;, WebCore::GraphicsContext&amp;, WebCore::GraphicsContext&amp;, WebCore::LayoutRect const&amp;, bool, WebCore::RenderLayer::LayerPaintingInfo const&amp;, unsigned int, WebCore::RenderObject*, bool)
18  0x7feefdadb8f3 WebCore::RenderLayer::paintLayerContents(WebCore::GraphicsContext&amp;, WebCore::RenderLayer::LayerPaintingInfo const&amp;, unsigned int)
19  0x7feefdada0d1 WebCore::RenderLayer::paintLayerContentsAndReflection(WebCore::GraphicsContext&amp;, WebCore::RenderLayer::LayerPaintingInfo const&amp;, unsigned int)
20  0x7feefdad9fae WebCore::RenderLayer::paintLayer(WebCore::GraphicsContext&amp;, WebCore::RenderLayer::LayerPaintingInfo const&amp;, unsigned int)
21  0x7feefdadc167 WebCore::RenderLayer::paintList(WTF::Vector&lt;WebCore::RenderLayer*, 0ul, WTF::CrashOnOverflow, 16ul&gt;*, WebCore::GraphicsContext&amp;, WebCore::RenderLayer::LayerPaintingInfo const&amp;, unsigned int)
22  0x7feefdadb9c0 WebCore::RenderLayer::paintLayerContents(WebCore::GraphicsContext&amp;, WebCore::RenderLayer::LayerPaintingInfo const&amp;, unsigned int)
23  0x7feefdb021f6 WebCore::RenderLayerBacking::paintIntoLayer(WebCore::GraphicsLayer const*, WebCore::GraphicsContext&amp;, WebCore::IntRect const&amp;, unsigned int, unsigned int)
24  0x7feefdb02560 WebCore::RenderLayerBacking::paintContents(WebCore::GraphicsLayer const*, WebCore::GraphicsContext&amp;, unsigned int, WebCore::FloatRect const&amp;)
25  0x7feefd8ee832 WebCore::GraphicsLayer::paintGraphicsLayerContents(WebCore::GraphicsContext&amp;, WebCore::FloatRect const&amp;)
26  0x7feefde57767 WebCore::CoordinatedGraphicsLayer::tiledBackingStorePaint(WebCore::GraphicsContext&amp;, WebCore::IntRect const&amp;)
27  0x7feefe82c4fe WebCore::Tile::paintToSurfaceContext(WebCore::GraphicsContext&amp;)
28  0x7feefde624eb WebCore::UpdateAtlasSurfaceClient::paintToSurfaceContext(WebCore::GraphicsContext&amp;)
29  0x7feefcec1f67 WebKit::WebCoordinatedSurface::paintToSurface(WebCore::IntRect const&amp;, WebCore::CoordinatedSurface::Client*)
30  0x7feefde62229 WebCore::UpdateAtlas::paintOnAvailableBuffer(WebCore::IntSize const&amp;, unsigned int&amp;, WebCore::IntPoint&amp;, WebCore::CoordinatedSurface::Client*)
31  0x7feefde4bfaf WebCore::CompositingCoordinator::paintToSurface(WebCore::IntSize const&amp;, unsigned int, unsigned int&amp;, WebCore::IntPoint&amp;, WebCore::CoordinatedSurface::Client*)
Aborted (core dumped)

Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007feef70c3f9c in WTFCrash () at ../../Source/WTF/wtf/Assertions.cpp:321
321     *(int *)(uintptr_t)0xbbadbeef = 0;
#0  0x00007feef70c3f9c in WTFCrash () at ../../Source/WTF/wtf/Assertions.cpp:321
#1  0x00007feefda68a27 in WebCore::RenderElement::drawLineForBoxSide (this=0x7feede7e3680, graphicsContext=..., rect=..., side=WebCore::BSRight, color=..., borderStyle=WebCore::SOLID, adjacentWidth1=-1, adjacentWidth2=-1, antialias=false) at ../../Source/WebCore/rendering/RenderElement.cpp:1994
#2  0x00007feefda67c09 in WebCore::RenderElement::drawLineForBoxSide (this=0x7feede7e3680, graphicsContext=..., rect=..., side=WebCore::BSRight, color=..., borderStyle=WebCore::DOUBLE, adjacentWidth1=-3, adjacentWidth2=-3, antialias=false) at ../../Source/WebCore/rendering/RenderElement.cpp:1916
#3  0x00007feefdac3ec4 in WebCore::RenderInline::paintOutlineForLine (this=0x7feede7e3680, graphicsContext=..., paintOffset=..., lastline=..., thisline=..., nextline=..., outlineColor=...) at ../../Source/WebCore/rendering/RenderInline.cpp:1644
#4  0x00007feefdac2f01 in WebCore::RenderInline::paintOutline (this=0x7feede7e3680, paintInfo=..., paintOffset=...) at ../../Source/WebCore/rendering/RenderInline.cpp:1595
#5  0x00007feefdb1f3dd in WebCore::RenderLineBoxList::paint (this=0x7feede7b7380, renderer=0x7feede7b72e0, paintInfo=..., paintOffset=...) at ../../Source/WebCore/rendering/RenderLineBoxList.cpp:279
#6  0x00007feefd9f15a9 in WebCore::RenderBlockFlow::paintInlineChildren (this=0x7feede7b72e0, paintInfo=..., paintOffset=...) at ../../Source/WebCore/rendering/RenderBlockFlow.cpp:3485
#7  0x00007feefd9b6630 in WebCore::RenderBlock::paintContents (this=0x7feede7b72e0, paintInfo=..., paintOffset=...) at ../../Source/WebCore/rendering/RenderBlock.cpp:1441
#8  0x00007feefd9b73b9 in WebCore::RenderBlock::paintObject (this=0x7feede7b72e0, paintInfo=..., paintOffset=...) at ../../Source/WebCore/rendering/RenderBlock.cpp:1590
#9  0x00007feefd9b6487 in WebCore::RenderBlock::paint (this=0x7feede7b72e0, paintInfo=..., paintOffset=...) at ../../Source/WebCore/rendering/RenderBlock.cpp:1420
#10 0x00007feefd9b6bab in WebCore::RenderBlock::paintChild (this=0x7feede7b7228, child=..., paintInfo=..., paintOffset=..., paintInfoForChild=..., usePrintRect=false, paintType=WebCore::RenderBlock::PaintAsBlock) at ../../Source/WebCore/rendering/RenderBlock.cpp:1494
#11 0x00007feefd9b677d in WebCore::RenderBlock::paintChildren (this=0x7feede7b7228, paintInfo=..., paintOffset=..., paintInfoForChild=..., usePrintRect=false) at ../../Source/WebCore/rendering/RenderBlock.cpp:1461
#12 0x00007feefd9b670a in WebCore::RenderBlock::paintContents (this=0x7feede7b7228, paintInfo=..., paintOffset=...) at ../../Source/WebCore/rendering/RenderBlock.cpp:1454
#13 0x00007feefd9b73b9 in WebCore::RenderBlock::paintObject (this=0x7feede7b7228, paintInfo=..., paintOffset=...) at ../../Source/WebCore/rendering/RenderBlock.cpp:1590
#14 0x00007feefd9b6487 in WebCore::RenderBlock::paint (this=0x7feede7b7228, paintInfo=..., paintOffset=...) at ../../Source/WebCore/rendering/RenderBlock.cpp:1420
#15 0x00007feefdaddae1 in WebCore::RenderLayer::paintForegroundForFragmentsWithPhase (this=0x7feede6fe7e0, phase=WebCore::PaintPhaseChildOutlines, layerFragments=..., context=..., localPaintingInfo=..., paintBehavior=0, subtreePaintRootForRenderer=0x0) at ../../Source/WebCore/rendering/RenderLayer.cpp:4738
#16 0x00007feefdadd82a in WebCore::RenderLayer::paintForegroundForFragments (this=0x7feede6fe7e0, layerFragments=..., context=..., transparencyLayerContext=..., transparencyPaintDirtyRect=..., haveTransparency=false, localPaintingInfo=..., paintBehavior=0, subtreePaintRootForRenderer=0x0, selectionOnly=false) at ../../Source/WebCore/rendering/RenderLayer.cpp:4716
#17 0x00007feefdadb8f3 in WebCore::RenderLayer::paintLayerContents (this=0x7feede6fe7e0, originalContext=..., paintingInfo=..., paintFlags=96) at ../../Source/WebCore/rendering/RenderLayer.cpp:4331
#18 0x00007feefdada0d1 in WebCore::RenderLayer::paintLayerContentsAndReflection (this=0x7feede6fe7e0, context=..., paintingInfo=..., paintFlags=96) at ../../Source/WebCore/rendering/RenderLayer.cpp:3987
#19 0x00007feefdad9fae in WebCore::RenderLayer::paintLayer (this=0x7feede6fe7e0, context=..., paintingInfo=..., paintFlags=96) at ../../Source/WebCore/rendering/RenderLayer.cpp:3969
#20 0x00007feefdadc167 in WebCore::RenderLayer::paintList (this=0x7feede6fe5a0, list=0x7feede7aac40, context=..., paintingInfo=..., paintFlags=96) at ../../Source/WebCore/rendering/RenderLayer.cpp:4436
#21 0x00007feefdadb9c0 in WebCore::RenderLayer::paintLayerContents (this=0x7feede6fe5a0, originalContext=..., paintingInfo=..., paintFlags=96) at ../../Source/WebCore/rendering/RenderLayer.cpp:4342
#22 0x00007feefdb021f6 in WebCore::RenderLayerBacking::paintIntoLayer (this=0x7feede7d9498, graphicsLayer=0x7feede42e000, context=..., paintDirtyRect=..., paintBehavior=0, paintingPhase=3) at ../../Source/WebCore/rendering/RenderLayerBacking.cpp:2303
#23 0x00007feefdb02560 in WebCore::RenderLayerBacking::paintContents (this=0x7feede7d9498, graphicsLayer=0x7feede42e000, context=..., paintingPhase=3, clip=...) at ../../Source/WebCore/rendering/RenderLayerBacking.cpp:2341
#24 0x00007feefd8ee832 in WebCore::GraphicsLayer::paintGraphicsLayerContents (this=0x7feede42e000, context=..., clip=...) at ../../Source/WebCore/platform/graphics/GraphicsLayer.cpp:413
#25 0x00007feefde57767 in WebCore::CoordinatedGraphicsLayer::tiledBackingStorePaint (this=0x7feede42e000, context=..., rect=...) at ../../Source/WebCore/platform/graphics/texmap/coordinated/CoordinatedGraphicsLayer.cpp:876
#26 0x00007feefe82c4fe in WebCore::Tile::paintToSurfaceContext (this=0x9b9310, context=...) at ../../Source/WebCore/platform/graphics/texmap/coordinated/Tile.cpp:100
#27 0x00007feefde624eb in WebCore::UpdateAtlasSurfaceClient::paintToSurfaceContext (this=0x7ffe6a8db330, context=...) at ../../Source/WebCore/platform/graphics/texmap/coordinated/UpdateAtlas.cpp:50
#28 0x00007feefcec1f67 in WebKit::WebCoordinatedSurface::paintToSurface (this=0x7feede7d6730, rect=..., client=0x7ffe6a8db330) at ../../Source/WebKit2/Shared/CoordinatedGraphics/WebCoordinatedSurface.cpp:190
#29 0x00007feefde62229 in WebCore::UpdateAtlas::paintOnAvailableBuffer (this=0x903d00, size=..., atlasID=&#64;0x7ffe6a8db490: 1, offset=..., client=0x9b9310) at ../../Source/WebCore/platform/graphics/texmap/coordinated/UpdateAtlas.cpp:110
#30 0x00007feefde4bfaf in WebCore::CompositingCoordinator::paintToSurface (this=0x7feede6e0000, size=..., flags=0, atlasID=&#64;0x7ffe6a8db490: 1, offset=..., client=0x9b9310) at ../../Source/WebCore/platform/graphics/texmap/coordinated/CompositingCoordinator.cpp:383
#31 0x00007feefde57c48 in WebCore::CoordinatedGraphicsLayer::paintToSurface (this=0x7feede42e000, size=..., atlas=&#64;0x7ffe6a8db490: 1, offset=..., client=0x9b9310) at ../../Source/WebCore/platform/graphics/texmap/coordinated/CoordinatedGraphicsLayer.cpp:926
#32 0x00007feefe82c2a6 in WebCore::Tile::updateBackBuffer (this=0x9b9310) at ../../Source/WebCore/platform/graphics/texmap/coordinated/Tile.cpp:75
#33 0x00007feefde5cdd7 in WebCore::TiledBackingStore::updateTileBuffers (this=0x7feede7a8be0) at ../../Source/WebCore/platform/graphics/texmap/coordinated/TiledBackingStore.cpp:100
#34 0x00007feefde5d712 in WebCore::TiledBackingStore::createTiles (this=0x7feede7a8be0, visibleRect=..., scaledContentsRect=...) at ../../Source/WebCore/platform/graphics/texmap/coordinated/TiledBackingStore.cpp:234
#35 0x00007feefde5cac9 in WebCore::TiledBackingStore::createTilesIfNeeded (this=0x7feede7a8be0, unscaledVisibleRect=..., contentsRect=...) at ../../Source/WebCore/platform/graphics/texmap/coordinated/TiledBackingStore.cpp:64
#36 0x00007feefde5818a in WebCore::CoordinatedGraphicsLayer::updateContentBuffers (this=0x7feede42e000) at ../../Source/WebCore/platform/graphics/texmap/coordinated/CoordinatedGraphicsLayer.cpp:995
#37 0x00007feefde57fa8 in WebCore::CoordinatedGraphicsLayer::updateContentBuffersIncludingSubLayers (this=0x7feede42e000) at ../../Source/WebCore/platform/graphics/texmap/coordinated/CoordinatedGraphicsLayer.cpp:967
#38 0x00007feefde57ff9 in WebCore::CoordinatedGraphicsLayer::updateContentBuffersIncludingSubLayers (this=0x7feede448cc0) at ../../Source/WebCore/platform/graphics/texmap/coordinated/CoordinatedGraphicsLayer.cpp:970
#39 0x00007feefde57ff9 in WebCore::CoordinatedGraphicsLayer::updateContentBuffersIncludingSubLayers (this=0x7feede41d140) at ../../Source/WebCore/platform/graphics/texmap/coordinated/CoordinatedGraphicsLayer.cpp:970
#40 0x00007feefde4a7fb in WebCore::CompositingCoordinator::flushPendingLayerChanges (this=0x7feede6e0000) at ../../Source/WebCore/platform/graphics/texmap/coordinated/CompositingCoordinator.cpp:99
#41 0x00007feefcf79bc4 in WebKit::CoordinatedLayerTreeHost::performScheduledLayerFlush (this=0x7feede7e2210) at ../../Source/WebKit2/WebProcess/WebPage/CoordinatedGraphics/CoordinatedLayerTreeHost.cpp:212
#42 0x00007feefcf79c7c in WebKit::CoordinatedLayerTreeHost::layerFlushTimerFired (this=0x7feede7e2210) at ../../Source/WebKit2/WebProcess/WebPage/CoordinatedGraphics/CoordinatedLayerTreeHost.cpp:227
#43 0x00007feefcf7b4c5 in std::_Mem_fn&lt;void (WebKit::CoordinatedLayerTreeHost::*)()&gt;::operator()&lt;, void&gt;(WebKit::CoordinatedLayerTreeHost*) const (this=0x87d5f0, __object=0x7feede7e2210) at /usr/include/c++/4.9/functional:569
#44 0x00007feefcf7b377 in std::_Bind&lt;std::_Mem_fn&lt;void (WebKit::CoordinatedLayerTreeHost::*)()&gt; (WebKit::CoordinatedLayerTreeHost*)&gt;::__call&lt;void, , 0ul&gt;(std::tuple&lt;&gt;&amp;&amp;, std::_Index_tuple&lt;0ul&gt;) (this=0x87d5f0, __args=&lt;unknown type in webkit/WebKitBuild/Debug/lib/libewebkit2.so.1, CU 0x1050706f, DIE 0x10678ff8&gt;) at /usr/include/c++/4.9/functional:1264
#45 0x00007feefcf7b1ef in std::_Bind&lt;std::_Mem_fn&lt;void (WebKit::CoordinatedLayerTreeHost::*)()&gt; (WebKit::CoordinatedLayerTreeHost*)&gt;::operator()&lt;, void&gt;() (this=0x87d5f0) at /usr/include/c++/4.9/functional:1323
#46 0x00007feefcf7af48 in std::_Function_handler&lt;void (), std::_Bind&lt;std::_Mem_fn&lt;void (WebKit::CoordinatedLayerTreeHost::*)()&gt; (WebKit::CoordinatedLayerTreeHost*)&gt; &gt;::_M_invoke(std::_Any_data const&amp;) (__functor=...) at /usr/include/c++/4.9/functional:2039
#47 0x00007feefc9d9a82 in std::function&lt;void ()&gt;::operator()() const (this=0x7feede7e2280) at /usr/include/c++/4.9/functional:2439
#48 0x00007feefca8629a in WebCore::Timer::fired (this=0x7feede7e2248) at ../../Source/WebCore/platform/Timer.h:133
#49 0x00007feefd87ec39 in WebCore::ThreadTimers::sharedTimerFiredInternal (this=0x7feede7d6258) at ../../Source/WebCore/platform/ThreadTimers.cpp:121
#50 0x00007feefd87e827 in WebCore::ThreadTimers::&lt;lambda()&gt;::operator()(void) const (__closure=0x87ca30) at ../../Source/WebCore/platform/ThreadTimers.cpp:73
#51 0x00007feefd87ee4a in std::_Function_handler&lt;void(), WebCore::ThreadTimers::setSharedTimer(WebCore::SharedTimer*)::&lt;lambda()&gt; &gt;::_M_invoke(const std::_Any_data &amp;) (__functor=...) at /usr/include/c++/4.9/functional:2039
#52 0x00007feefc9d9a82 in std::function&lt;void ()&gt;::operator()() const (this=0x7fef0274d9e8 &lt;WebCore::MainThreadSharedTimer::singleton()::instance+8&gt;) at /usr/include/c++/4.9/functional:2439
#53 0x00007feefe611675 in WebCore::MainThreadSharedTimer::fired (this=0x7fef0274d9e0 &lt;WebCore::MainThreadSharedTimer::singleton()::instance&gt;) at ../../Source/WebCore/platform/MainThreadSharedTimer.cpp:52
#54 0x00007feefe81f1bc in WebCore::timerEvent () at ../../Source/WebCore/platform/efl/MainThreadSharedTimerEfl.cpp:44
#55 0x00007feef4a85d1e in _ecore_call_task_cb (data=&lt;optimized out&gt;, func=&lt;optimized out&gt;) at lib/ecore/ecore_private.h:336
#56 _ecore_timer_expired_call (when=841399.04560129903) at lib/ecore/ecore_timer.c:733
#57 0x00007feef4a85e6b in _ecore_timer_expired_timers_call (when=841399.04560129903) at lib/ecore/ecore_timer.c:686
#58 0x00007feef4a81b41 in _ecore_main_loop_iterate_internal (once_only=once_only&#64;entry=0) at lib/ecore/ecore_main.c:1812
#59 0x00007feef4a81fc7 in ecore_main_loop_begin () at lib/ecore/ecore_main.c:983
#60 0x00007feef711ee8d in WTF::RunLoop::run () at ../../Source/WTF/wtf/efl/RunLoopEfl.cpp:49
#61 0x00007feefcf7ee1b in WebKit::ChildProcessMain&lt;WebKit::WebProcess, WebKit::WebProcessMain&gt; (argc=2, argv=0x7ffe6a8dbdb8) at ../../Source/WebKit2/Shared/unix/ChildProcessMain.h:61
#62 0x00007feefcf7ea29 in WebKit::WebProcessMainUnix (argc=2, argv=0x7ffe6a8dbdb8) at ../../Source/WebKit2/WebProcess/efl/WebProcessMainEfl.cpp:161
#63 0x00000000004008ea in main (argc=2, argv=0x7ffe6a8dbdb8) at ../../Source/WebKit2/WebProcess/EntryPoint/unix/WebProcessMain.cpp:44</pre>
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