adjacency_list documentations refers to 'stability' problems of vertex descriptors and iterators. it also provides two wrong and one correct ways to remove all vertices from a graph, trying to use the 'correct' way produced an exception from within vector::erase. after looking into the state of the iterators I understand that the 'correct' example isn't correct at all, the iterators still refers to the original offsets in the vertices vector when the current vertex is erased from the graph. i.e. suppose the graph had 7 vertices to begin with and we've already erased the first one, the iterator to current (vi in the example) should point to offset 0 and the end iterator(vi_end in the example) should point to offset 6, instead we have iterators to offsets 1 and 7. am I right? if so, what is the correct way to do it? eyal.