vlib/v/checker/tests/generics_struct_infer_err.vv:7:10: error: could not infer generic type `U` in generic struct `Foo[T, U]`
    5 | 
    6 | fn main() {
    7 |     st11 := Foo{
      |             ~~~~
    8 |         a: 'two'
    9 |     }