[Webkit-unassigned] [Bug 116901] New: ASSERTION FAILED: !m_visibleDescendantStatusDirty on twitter

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=116901

           Summary: ASSERTION FAILED: !m_visibleDescendantStatusDirty on
                    twitter
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: simon.fraser at apple.com
                CC: noam at webkit.org


On Twitter in debug builds it's fairly common to hit:

ASSERTION FAILED: !m_visibleDescendantStatusDirty
/Volumes/SSData/Development/OSX/webkit/OpenSource/Source/WebCore/rendering/RenderLayer.cpp(6038) : bool WebCore::RenderLayer::isVisuallyNonEmpty() const
1   0x102b37960 WTFCrash
2   0x104ace598 WebCore::RenderLayer::isVisuallyNonEmpty() const
3   0x104af956b WebCore::RenderLayerCompositor::requiresCompositingForPosition(WebCore::RenderObject*, WebCore::RenderLayer const*, WebCore::RenderLayer::ViewportConstrainedNotCompositedReason*) const
4   0x104af36dd WebCore::RenderLayerCompositor::requiresCompositingLayer(WebCore::RenderLayer const*, WebCore::RenderLayer::ViewportConstrainedNotCompositedReason*) const
5   0x104af3fba WebCore::RenderLayerCompositor::needsToBeComposited(WebCore::RenderLayer const*, WebCore::RenderLayer::ViewportConstrainedNotCompositedReason*) const
6   0x104af204e WebCore::RenderLayerCompositor::computeCompositingRequirements(WebCore::RenderLayer*, WebCore::RenderLayer*, WebCore::RenderLayerCompositor::OverlapMap*, WebCore::CompositingState&, bool&, bool&)
7   0x104af2377 WebCore::RenderLayerCompositor::computeCompositingRequirements(WebCore::RenderLayer*, WebCore::RenderLayer*, WebCore::RenderLayerCompositor::OverlapMap*, WebCore::CompositingState&, bool&, bool&)
8   0x104af2377 WebCore::RenderLayerCompositor::computeCompositingRequirements(WebCore::RenderLayer*, WebCore::RenderLayer*, WebCore::RenderLayerCompositor::OverlapMap*, WebCore::CompositingState&, bool&, bool&)
9   0x104af1941 WebCore::RenderLayerCompositor::updateCompositingLayers(WebCore::CompositingUpdateType, WebCore::RenderLayer*)
10  0x103dfcd8d WebCore::FrameView::updateCompositingLayersAfterLayout()
11  0x103dfee65 WebCore::FrameView::layout(bool)
12  0x103b548de WebCore::Document::updateLayout()
13  0x103b57c95 WebCore::Document::updateLayoutIgnorePendingStylesheets()
14  0x103cb5c07 WebCore::Element::offsetParent()
15  0x103cb5b55 WebCore::Element::bindingsOffsetParent()
16  0x104338e4f WebCore::jsElementOffsetParent(JSC::ExecState*, JSC::JSValue, JSC::PropertyName)
17  0x1026a1809 JSC::PropertySlot::getValue(JSC::ExecState*, JSC::PropertyName) const

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