vlib/v/checker/tests/union_unsafe_fields.vv:12:9: warning: reading a union field (or its address) requires `unsafe`
   10 |     }
   11 |     u.f = 3.3 // ok
   12 |     _ := u.u
      |            ^
   13 |     return &u.f
   14 | }
vlib/v/checker/tests/union_unsafe_fields.vv:13:12: warning: reading a union field (or its address) requires `unsafe`
   11 |     u.f = 3.3 // ok
   12 |     _ := u.u
   13 |     return &u.f
      |               ^
   14 | }
vlib/v/checker/tests/union_unsafe_fields.vv:13:9: error: fn `f` expects you to return a non reference type `f32`, but you are returning `&f32` instead
   11 |     u.f = 3.3 // ok
   12 |     _ := u.u
   13 |     return &u.f
      |            ^
   14 | }
Details: use `return *pointer` instead of `return pointer`, and just `return value` instead of `return &value`