%Warning-CONSTRAINTIGN: t/t_constraint_mode.v:10:4: Constraint ignored (unsupported)
   10 |    constraint a { one > 0 && one < 2; }
      |    ^~~~~~~~~~
                        ... For warning description see https://verilator.org/warn/CONSTRAINTIGN?v=latest
                        ... Use "/* verilator lint_off CONSTRAINTIGN */" and lint_on around source to disable this message.
%Warning-CONSTRAINTIGN: t/t_constraint_mode.v:14:11: rand_mode ignored (unsupported)
                                                   : ... In instance t
   14 |       one.rand_mode(0);
      |           ^~~~~~~~~
%Warning-CONSTRAINTIGN: t/t_constraint_mode.v:15:11: rand_mode ignored (unsupported)
                                                   : ... In instance t
   15 |       one.rand_mode(1);
      |           ^~~~~~~~~
%Warning-CONSTRAINTIGN: t/t_constraint_mode.v:16:15: rand_mode ignored (unsupported)
                                                   : ... In instance t
   16 |       if (one.rand_mode() != 1) $stop;
      |               ^~~~~~~~~
%Warning-CONSTRAINTIGN: t/t_constraint_mode.v:19:9: constraint_mode ignored (unsupported)
                                                  : ... In instance t
   19 |       a.constraint_mode(1);
      |         ^~~~~~~~~~~~~~~
%Warning-CONSTRAINTIGN: t/t_constraint_mode.v:20:9: constraint_mode ignored (unsupported)
                                                  : ... In instance t
   20 |       a.constraint_mode(0);
      |         ^~~~~~~~~~~~~~~
%Warning-CONSTRAINTIGN: t/t_constraint_mode.v:21:13: constraint_mode ignored (unsupported)
                                                   : ... In instance t
   21 |       if (a.constraint_mode() != 0) $stop;
      |             ^~~~~~~~~~~~~~~
%Warning-CONSTRAINTIGN: t/t_constraint_mode.v:41:13: rand_mode ignored (unsupported)
                                                   : ... In instance t
   41 |       p.one.rand_mode(0);
      |             ^~~~~~~~~
%Warning-CONSTRAINTIGN: t/t_constraint_mode.v:42:13: rand_mode ignored (unsupported)
                                                   : ... In instance t
   42 |       p.one.rand_mode(1);
      |             ^~~~~~~~~
%Warning-CONSTRAINTIGN: t/t_constraint_mode.v:43:17: rand_mode ignored (unsupported)
                                                   : ... In instance t
   43 |       if (p.one.rand_mode() != 1) $stop;
      |                 ^~~~~~~~~
%Warning-CONSTRAINTIGN: t/t_constraint_mode.v:46:11: constraint_mode ignored (unsupported)
                                                   : ... In instance t
   46 |       p.a.constraint_mode(1);
      |           ^~~~~~~~~~~~~~~
%Warning-CONSTRAINTIGN: t/t_constraint_mode.v:47:11: constraint_mode ignored (unsupported)
                                                   : ... In instance t
   47 |       p.a.constraint_mode(0);
      |           ^~~~~~~~~~~~~~~
%Warning-CONSTRAINTIGN: t/t_constraint_mode.v:48:15: constraint_mode ignored (unsupported)
                                                   : ... In instance t
   48 |       if (p.a.constraint_mode() != 0) $stop;
      |               ^~~~~~~~~~~~~~~
%Error: Exiting due to