vlib/v/checker/tests/for_in_index_type.vv:2:11: error: for in: cannot index `int literal`
    1 | fn main() {
    2 |     for a in 52 {
      |              ~~
    3 |         println(a)
    4 |     }
vlib/v/checker/tests/for_in_index_type.vv:3:3: error: `println` can not print void expressions
    1 | fn main() {
    2 |     for a in 52 {
    3 |         println(a)
      |         ~~~~~~~~~~
    4 |     }
    5 | }