%Error-UNSUPPORTED: t/t_var_ref_static.v:12:22: Unsupported: 'ref static' ports
   12 |    function void crs(const ref static i);
      |                      ^~~~~
                    ... For error description see https://verilator.org/warn/UNSUPPORTED?v=latest
%Error-UNSUPPORTED: t/t_var_ref_static.v:14:21: Unsupported: 'ref static' ports
   14 |    function void rs(ref static i);
      |                     ^~~
%Error: Exiting due to