... Use "/* verilator lint_off CASTCONST */" and lint_on around source to disable this message.
%Warning-CASTCONST: t/t_castdyn_castconst_bad.v:21:11: $cast will always return one as 'CLASSREFDTYPE 'Base'' is always castable from 'CLASSREFDTYPE 'Base''
: ... In instance t
: ... Suggest static cast
21 | i = $cast(b, b);
| ^~~~~
%Warning-CASTCONST: t/t_castdyn_castconst_bad.v:22:11: $cast will always return zero as 'CLASSREFDTYPE 'Base'' is not castable from 'CLASSREFDTYPE 'Other''