%Error-UNSUPPORTED: t/t_checker.v:33:1: Unsupported: checker
   33 | checker Chk
      | ^~~~~~~
                    ... For error description see https://verilator.org/warn/UNSUPPORTED?v=latest
%Error-UNSUPPORTED: t/t_checker.v:36:8: Unsupported: checker data declaration
   36 |    bit clk;
      |        ^~~
%Error-UNSUPPORTED: t/t_checker.v:37:8: Unsupported: checker data declaration
   37 |    bit in;
      |        ^~
%Error-UNSUPPORTED: t/t_checker.v:38:8: Unsupported: checker data declaration
   38 |    bit rst;
      |        ^~~
%Error-UNSUPPORTED: t/t_checker.v:39:4: Unsupported: checker rand
   39 |    rand bit randed;   
      |    ^~~~
%Error-UNSUPPORTED: t/t_checker.v:41:8: Unsupported: checker data declaration
   41 |    int counter = 0;
      |        ^~~~~~~
%Error-UNSUPPORTED: t/t_checker.v:43:8: Unsupported: checker data declaration
   43 |    int ival;
      |        ^~~~
%Error-UNSUPPORTED: t/t_checker.v:53:8: Unsupported: checker data declaration
   53 |    int ival2;
      |        ^~~~~
%Error-UNSUPPORTED: t/t_checker.v:61:4: Unsupported: checker default clocking
   61 |    default clocking clk;   
      |    ^~~~~~~
%Error-UNSUPPORTED: t/t_checker.v:62:4: Unsupported: checker default disable iff
   62 |    default disable iff rst;   
      |    ^~~~~~~
%Error-UNSUPPORTED: t/t_checker.v:64:4: Unsupported: checker
   64 |    checker ChkChk;   
      |    ^~~~~~~
%Error-UNSUPPORTED: t/t_checker.v:64:12: Unsupported: recursive checker
   64 |    checker ChkChk;   
      |            ^~~~~~
%Error: Exiting due to