Hi, I'm trying to learn how to use the Boost Graph Library. Here is a very simple code example. #include <boost/graph/adjacency_list.hpp> #include <string> int main( void ) { using namespace std; using namespace boost; typedef adjacency_list< listS, vecS, directedS, // Vertex properties property< vertex_name_t, std::string >, // Edge properties property< edge_weight_t, int > > Graph; Graph graph; // Graph traits used to access graph's iterator types graph_traits< Graph >::vertex_descriptor a, b; a = add_vertex( graph ); b = add_vertex( graph ); graph_traits< Graph >::edge_descriptor ed; bool inserted; tie( ed, inserted ) = add_edge( a, b, graph ); // LINE 26 return 0; } When I compile this with g++ v4, I get on my Debian Etch system the warning for line 26: /usr/include/boost/graph/detail/adjacency_list.hpp:263: warning: 'p$m_value' is used uninitialized in this function Line 263 in adjacency_list.hpp looks as follows: inline stored_edge_property(Vertex target, const Property& p = Property()) : stored_edge<Vertex>(target), m_property(new Property(p)) { } What am I doing wrong and how can I fix that? Thank you. Regards, Paul