adjacency_matrix::add_vertex always aborts in Debug mode ?

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Description

template < typename D, typename VP, typename EP, typename GP, typename A >
inline typename adjacency_matrix< D, VP, EP, GP, A >::vertex_descriptor
add_vertex(adjacency_matrix< D, VP, EP, GP, A >& g)
{
    // UNDER CONSTRUCTION
    BOOST_ASSERT(false);
    return *vertices(g).first;
}

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