Previously I had reported a problem evaluating a function after I had changed the mesh coordinates (see https://answers.launchpad.net/dolfin/+question/223696 and https://bugs.launchpad.net/dolfin/+bug/1155271). At that time (I think I was using version 1.1) the solution was to call mesh.intersection_operator().clear() after modifying the mesh coordinates and before evaluating a function defined on the mesh. This continued to work with version 1.2 but intersection_operator no longer seems to exist in version 1.3. What must I do to be able to correctly evaluate a function after modifying the mesh using version 1.3?