%Error: t/t_class_param_enum_bad.v:25:40: Assign RHS expects a CLASSREFDTYPE 'Converter__Tz2', got CLASSREFDTYPE 'Converter__Tz1'
                                        : ... note: In instance 't'
   25 |     automatic Converter #(bit) conv2 = conv1;
      |                                        ^~~~~
        ... See the manual at https://verilator.org/verilator_doc.html?v=latest for more assistance.
%Error-ENUMVALUE: t/t_class_param_enum_bad.v:26:17: Implicit conversion to enum 'enum{}$unit::enum_t' from 'bit[31:0]' (IEEE 1800-2023 6.19.3)
                                                  : ... note: In instance 't'
                                                  : ... Suggest use enum's mnemonic, or static cast
   26 |     conv1.toInt(0);
      |                 ^
                  ... For error description see https://verilator.org/warn/ENUMVALUE?v=latest
%Error: Exiting due to