Added ASSERT(!document.childNeedsDistributionRecalc) to NodeRenderingTraversal::parent

Source/core/css/resolver/ElementResolveContext.cpp

Index: Source/core/css/resolver/ElementResolveContext.cpp
diff --git a/Source/core/css/resolver/ElementResolveContext.cpp b/Source/core/css/resolver/ElementResolveContext.cpp
index 40008283689d0ecd3035fb2dba264d1b7621c678..6c031d8215fc1bf76140f3885a360355512bd7ad 100644
--- a/Source/core/css/resolver/ElementResolveContext.cpp
+++ b/Source/core/css/resolver/ElementResolveContext.cpp
@@ -44,6 +44,7 @@ ElementResolveContext::ElementResolveContext(Element& element)
     , m_distributedToInsertionPoint(false)
 {
     NodeRenderingTraversal::ParentDetails parentDetails;
+    element.document().updateDistributionForNodeIfNeeded(&element);

[esprehn, 2014/08/06 17:16:37]

This isn't the right place for this, we should have already updated distribution
for the entire document at the start of recalcStyle which is where
ElementResolveContext is used.

What's the crash stack you're trying to fix?

     m_parentNode = NodeRenderingTraversal::parent(&element, &parentDetails);
     m_distributedToInsertionPoint = parentDetails.insertionPoint();