%Error: t/t_class_param_noinit_bad.v:13:7: Class parameter without default value is never given value (IEEE 1800-2023 6.20.1): 'B'
                                         : ... note: In instance 't'
   13 |       Cls #(1) c;   
      |       ^~~
%Error: t/t_class_param_noinit_bad.v:13:7: Class parameter type without default value is never given value (IEEE 1800-2023 6.20.1): 'T'
                                         : ... note: In instance 't'
   13 |       Cls #(1) c;   
      |       ^~~
%Error: Verilator internal fault, sorry. Suggest trying --debug --gdbbt
%Error: Command Failed