Merge 98763

Source/WebCore/rendering/RenderBlock.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 818 matching lines @@
             inlineRunEnd = curr;
             if (curr->isInline())
                 sawInline = true;
             curr = curr->nextSibling();
         }
     } while (!sawInline);
 }
 
 void RenderBlock::deleteLineBoxTree()
 {
+    if (containsFloats()) {
+        // Clear references to originating lines, since the lines are being deleted
+        const FloatingObjectSet& floatingObjectSet = m_floatingObjects->set();
+        FloatingObjectSetIterator end = floatingObjectSet.end();
+        for (FloatingObjectSetIterator it = floatingObjectSet.begin(); it != end; ++it) {
+            ASSERT(!((*it)->m_originatingLine) || (*it)->m_originatingLine->renderer() == this);
+            (*it)->m_originatingLine = 0;
+        }
+    }
     m_lineBoxes.deleteLineBoxTree(renderArena());
 }
 
 RootInlineBox* RenderBlock::createRootInlineBox() 
 {
     return new (renderArena()) RootInlineBox(this);
 }
 
 RootInlineBox* RenderBlock::createAndAppendRootInlineBox()
 {
@@ skipping 5761 matching lines @@
 }
 
 String ValueToString<RenderBlock::FloatingObject*>::string(const RenderBlock::FloatingObject* floatingObject)
 {
     return String::format("%p (%dx%d %dx%d)", floatingObject, floatingObject->x(), floatingObject->y(), floatingObject->maxX(), floatingObject->maxY());
 }
 
 #endif
 
 } // namespace WebCore