From ba5b90d43e8df70063feb894ead21325ade4f2a8 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Thu, 29 Apr 2004 15:57:03 +0000
Subject: [PATCH] Added missing dirtyBound() to billboard section of flatten
 static transforms

---
 src/osgUtil/Simplifier.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/osgUtil/Simplifier.cpp b/src/osgUtil/Simplifier.cpp
index c3339a45e..5090d870b 100644
--- a/src/osgUtil/Simplifier.cpp
+++ b/src/osgUtil/Simplifier.cpp
@@ -812,8 +812,11 @@ public:
         }
 
         //osg::notify(osg::NOTICE)<<"  pNew="<<pNew<<"\tedge_p1"<<edge_p1.get()<<"\tedge_p2"<<edge_p2.get()<<std::endl;
-        for(TriangleSet::iterator teitr=edge->_triangles.begin();
-            teitr!=edge->_triangles.end();
+        
+        // we copy the edge's _triangles to and interate the copy of the triangle set to avoid invalidating iterators.
+        TriangleSet trianglesToRemove = edge->_triangles;
+        for(TriangleSet::iterator teitr=trianglesToRemove.begin();
+            teitr!=trianglesToRemove.end();
             ++teitr)
         {
             Triangle* triangle = const_cast<Triangle*>(teitr->get());