%Error: t/t_class_param_noinit_bad.v:17:5: Class parameter without default value is never given value (IEEE 1800-2023 6.20.1): 'B'
                                         : ... note: In instance 't'
   17 |     Cls #(1) c;   
      |     ^~~
        ... See the manual at https://verilator.org/verilator_doc.html?v=latest for more assistance.
%Error: t/t_class_param_noinit_bad.v:17:5: Class parameter type without default value is never given value (IEEE 1800-2023 6.20.1): 'T'
                                         : ... note: In instance 't'
   17 |     Cls #(1) c;   
      |     ^~~
%Error: t/t_class_param_noinit_bad.v:11:10: Parameter type without default value is never given value (IEEE 1800-2023 6.20.1): 'T'
                                          : ... note: In instance 't'
   11 |     type T
      |          ^
%Error: Exiting due to