vlib/v/checker/tests/match_mut_with_immutable_var_err.vv:5:12: error: `i` is immutable, declare it with `mut` to make it mutable
    3 | fn main() {
    4 |     i := Int(0)
    5 |     match mut i {
      |               ^
    6 |         int { i = 1 }
    7 |         u8 { i = 2 }