vlib/v/checker/tests/sumtype_init_with_ref_fields_err.vv:10:7: error: reference field `Node.parent` must be initialized
    8 | 
    9 | fn main() {
   10 |     s := Sumtype{}
      |          ~~~~~~~~~
   11 |     dump(s)
   12 | }
vlib/v/checker/tests/sumtype_init_with_ref_fields_err.vv:10:7: error: reference field `Node.left` must be initialized
    8 | 
    9 | fn main() {
   10 |     s := Sumtype{}
      |          ~~~~~~~~~
   11 |     dump(s)
   12 | }
vlib/v/checker/tests/sumtype_init_with_ref_fields_err.vv:10:7: error: reference field `Node.right` must be initialized
    8 | 
    9 | fn main() {
   10 |     s := Sumtype{}
      |          ~~~~~~~~~
   11 |     dump(s)
   12 | }
