%Error: t/t_class_param_enum_bad.v:20:31: Assign RHS expects a CLASSREFDTYPE 'Converter__Tz2', got CLASSREFDTYPE 'Converter__Tz1'
                                        : ... In instance t
   20 |       Converter#(bit) conv2 = conv1;
      |                               ^~~~~
%Error-ENUMVALUE: t/t_class_param_enum_bad.v:21:19: Implicit conversion to enum 'T' from 'logic[31:0]' (IEEE 1800-2017 6.19.3)
                                                  : ... In instance t
                                                  : ... Suggest use enum's mnemonic, or static cast
   21 |       conv1.toInt(0);
      |                   ^
                  ... For error description see https://verilator.org/warn/ENUMVALUE?v=latest
%Error: Exiting due to