boost BGL: smallest_last_vertex_ordering asserts false if a graph has no vertices

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For example, the follow code asserts false from bucketsort.

typedef boost::adjacency_list<
        boost::vecS, // outedgelist
        boost::vecS, // vertexlist
        > Graph;
typedef Graph::vertex_descriptor VertexDesc;
Graph graph;
boost::vector_property_map<VertexDesc> order;
boost::smallest_last_vertex_ordering(graph, order);

Is this expected?

edited 20 secs ago

Guvante

10.9k

asked 57 secs ago

Joe C

125

boost BGL: smallest_last_vertex_ordering asserts false if a graph has no vertices