vlib/v/checker/tests/wrong_option_unwrap_err.vv:3:14: error: `or` block must provide a value of type `string`, not `none`
    1 | fn main() {
    2 |     a := ?string('c')
    3 |     b := a or { none }
      |                 ~~~~
    4 |     println(b)
    5 | }