%Error-UNSUPPORTED: t/t_let_unsup.v:10:10: Unsupported: let typed ports
   10 |    let G(int a) = 30 + a;
      |          ^~~
                    ... For error description see https://verilator.org/warn/UNSUPPORTED?v=latest
%Error-UNSUPPORTED: t/t_let_unsup.v:11:10: Unsupported: let typed ports
   11 |    let H(signed a) = 30 + a;
      |          ^~~~~~
%Error: Exiting due to