message: Deleting face neighbor data during derefinement
diff: @@ -3055,6 +3055,8 @@ bool ParMesh::NonconformingDerefinement(Array<double> &elem_error,
  long glob_size = ReduceInt(derefs.Size());
  if (!glob_size) { return false; }
  + DeleteFaceNbrData();
  +
  pncmesh->Derefine(derefs);
  ParMesh* mesh2 = new ParMesh(*pncmesh);
  