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[Iasonm <>]

auto h_range = CGAL::halfedges_around_source(someVertex, m_M);
  for (auto it = h_range.begin(); it != h_range.end(); it++) {
  //or for(auto hei:h_range){
    auto hei = *it;
  //..
  }

the above code runs for ever and hei oscillates in the loop between two
values. This happens after I have collapsed several edges, consequently I
wonder whether by calling CGAL::Euler::collapse_edge I brake the mesh in
some way and the call to CGAL::halfedges_around_source returns a range
without an ending..



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