#0  0x40243ab1 in kill () from /lib/libc.so.6
#1  0x40020982 in pthread_kill () from /lib/libpthread.so.0
#2  0x40020e6d in raise () from /lib/libpthread.so.0
#3  0x40244edb in abort () from /lib/libc.so.6
#4  0x400b051d in _STL::__stl_debug_engine<bool>::_Terminate() () at ../stlport/stl/debug/_debug.c:322
#5  0x400b0033 in _STL::__stl_debug_engine<bool>::_Assert(char const*, char const*, int) (__expr=0x0, __f=0x0, __l=0)
    at ../stlport/stl/debug/_debug.c:307
#6  0x0804c7bb in _STL::_DBG_iter<_STL::__list<boost::list_edge<unsigned, boost::no_property>, _STL::allocator<boost::list_edge<unsigned, boost::no_property> > >, _STL::_Nonconst_traits<boost::list_edge<unsigned, boost::no_property> > >::operator*() const (this=0x8056c0c)
    at /usr/local/STLport-4.5.3/stlport/stl/debug/_iterator.h:251
#7  0x0804b71f in _STL::_DBG_iter<_STL::__list<boost::list_edge<unsigned, boost::no_property>, _STL::allocator<boost::list_edge<unsigned, boost::no_property> > >, _STL::_Nonconst_traits<boost::list_edge<unsigned, boost::no_property> > >::operator->() const (this=0x8056c0c)
    at /usr/local/STLport-4.5.3/stlport/stl/debug/_iterator.h:255
#8  0x0804beac in boost::detail::sei_<unsigned, _STL::_DBG_iter<_STL::__list<boost::list_edge<unsigned, boost::no_property>, _STL::allocator<boost::list_edge<unsigned, boost::no_property> > >, _STL::_Nonconst_traits<boost::list_edge<unsigned, boost::no_property> > >, boost::no_property>::get_property() (this=0x8056c08) at /ive/witt/systems/boost/boost/graph/detail/adjacency_list.hpp:252
#9  0x0804b10e in apply<boost::detail::edge_desc_impl<boost::undirected_tag, size_t>, boost::detail::adj_list_gen<boost::adjacency_list<boost::vecS, boost::vecS, boost::undirectedS, boost::no_property, boost::no_property, boost::no_property, boost::listS>, boost::vecS, boost::vecS, boost::undirectedS, boost::no_property, boost::no_property, boost::no_property, boost::listS>::config> (e=
      {<edge_base<boost::undirected_tag,unsigned int>> = {m_source = 0, m_target = 1}, m_eproperty = 0x8056d50}, g_=@0xbfffef34)
    at /ive/witt/systems/boost/boost/graph/detail/adjacency_list.hpp:638
#10 0x0804a437 in boost::undirected_graph_helper<boost::detail::adj_list_gen<boost::adjacency_list<boost::vecS, boost::vecS, boost::undirectedS, boost::no_property, boost::no_property, boost::no_property, boost::listS>, boost::vecS, boost::vecS, boost::undirectedS, boost::no_property, boost::no_property, boost::no_property, boost::listS>::config>::remove_edge(boost::detail::edge_desc_impl<boost::undirected_tag, unsigned>)
    (this=0xbfffef34, e={<edge_base<boost::undirected_tag,unsigned int>> = {m_source = 0, m_target = 1}, m_eproperty = 0x8056d50})
    at /ive/witt/systems/boost/boost/graph/detail/adjacency_list.hpp:705
#11 0x08049e54 in remove_edge<boost::detail::edge_desc_impl<boost::undirected_tag, size_t>, boost::detail::adj_list_gen<boost::adjacency_list<boost::vecS, boost::vecS, boost::undirectedS, boost::no_property, boost::no_property, boost::no_property, boost::listS>, boost::vecS, boost::vecS, boost::undirectedS, boost::no_property, boost::no_property, boost::no_property, boost::listS>::config> (e=
      {<edge_base<boost::undirected_tag,unsigned int>> = {m_source = 0, m_target = 1}, m_eproperty = 0x8056d50}, g_=@0xbfffef34)
    at /ive/witt/systems/boost/boost/graph/detail/adjacency_list.hpp:721
#12 0x08049ba1 in main () at bgl.cpp:36
#13 0x402329ed in __libc_start_main () from /lib/libc.so.6