1 error[E0277]: the type `[{integer}]` cannot be indexed by `i32`
2 --> $DIR/index-help.rs:3:7
5 | ^^^^ slice indices are of type `usize` or ranges of `usize`
7 = help: the trait `SliceIndex<[{integer}]>` is not implemented for `i32`
8 = help: the trait `SliceIndex<[T]>` is implemented for `usize`
9 = note: required for `Vec<{integer}>` to implement `Index<i32>`
11 error: aborting due to previous error
13 For more information about this error, try `rustc --explain E0277`.