In Mesh_domain_with_polyline_features_3, the type FT must be taken from the geom traits, and not from the base, because the concept MeshDomain_3 does not ask for the type FT.
In Mesh_domain_with_polyline_features_3, the type FT must be taken from the geom traits, and not from the base, because the concept MeshDomain_3 does not ask for the type FT.