Index: subgraph.hpp
===================================================================
RCS file: /cvsroot/boost/boost/boost/graph/subgraph.hpp,v
retrieving revision 1.40
diff -u -r1.40 subgraph.hpp
--- subgraph.hpp	15 Apr 2004 07:26:57 -0000	1.40
+++ subgraph.hpp	17 Jul 2004 08:57:23 -0000
@@ -186,7 +186,8 @@
     {
       typename std::map<vertex_descriptor, vertex_descriptor>::const_iterator
         i = m_local_vertex.find(u_global);
-      return std::make_pair((*i).second, i != m_local_vertex.end());
+      bool valid = i != m_local_vertex.end();
+      return std::make_pair((valid ? (*i).second : u_global), valid);
     }
 
     // Return the parent graph.