5 impl Index<i32> for X {
8 fn index(&self, _: i32) -> &() {
14 let x = vec![1, 2, 3];
15 x[x.len() -1]; //~ ERROR negative integers cannot be used to index on a
17 x[x.len() -1]; //~ ERROR negative integers cannot be used to index on a
19 x[x.len() -1]; //~ ERROR negative integers cannot be used to index on a