vlib/v/checker/tests/generic_sumtype_decl_err_c.vv:7:27: error: generic type name `T` of generic struct `Just[T]` is not mentioned in sumtype `Maybe[B]`
    5 | struct Nothing {}
    6 | 
    7 | type Maybe[B] = Nothing | Just[T]
      |                           ~~~~~~~
    8 | 
    9 | fn main() {
