vlib/v/checker/tests/reference_return.vv:6:9: error: fn `f` expects you to return a reference type `&Aa`, but you are returning `Aa` instead
    4 | 
    5 | fn f() &Aa {
    6 |     return Aa{
      |            ~~~
    7 |         a: 1
    8 |     }
