error[E0277]: the type `str` cannot be indexed by `{integer}`
  --> $DIR/str-idx.rs:3:19
   |
LL |     let _: u8 = s[4];
   |                   ^ string indices are ranges of `usize`
   |
   = help: the trait `SliceIndex<str>` is not implemented for `{integer}`
   = note: you can use `.chars().nth()` or `.bytes().nth()`
           for more information, see chapter 8 in The Book: <https://doc.rust-lang.org/book/ch08-02-strings.html#indexing-into-strings>
   = help: the trait `SliceIndex<[T]>` is implemented for `usize`
   = note: required because of the requirements on the impl of `Index<{integer}>` for `str`

error[E0277]: the type `str` cannot be indexed by `{integer}`
  --> $DIR/str-idx.rs:4:19
   |
LL |     let _ = s.get(4);
   |               --- ^ string indices are ranges of `usize`
   |               |
   |               required by a bound introduced by this call
   |
   = help: the trait `SliceIndex<str>` is not implemented for `{integer}`
   = note: you can use `.chars().nth()` or `.bytes().nth()`
           for more information, see chapter 8 in The Book: <https://doc.rust-lang.org/book/ch08-02-strings.html#indexing-into-strings>
   = help: the trait `SliceIndex<[T]>` is implemented for `usize`
note: required by a bound in `core::str::<impl str>::get`
  --> $SRC_DIR/core/src/str/mod.rs:LL:COL
   |
LL |     pub const fn get<I: ~const SliceIndex<str>>(&self, i: I) -> Option<&I::Output> {
   |                         ^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `core::str::<impl str>::get`

error[E0277]: the type `str` cannot be indexed by `{integer}`
  --> $DIR/str-idx.rs:5:29
   |
LL |     let _ = s.get_unchecked(4);
   |               ------------- ^ string indices are ranges of `usize`
   |               |
   |               required by a bound introduced by this call
   |
   = help: the trait `SliceIndex<str>` is not implemented for `{integer}`
   = note: you can use `.chars().nth()` or `.bytes().nth()`
           for more information, see chapter 8 in The Book: <https://doc.rust-lang.org/book/ch08-02-strings.html#indexing-into-strings>
   = help: the trait `SliceIndex<[T]>` is implemented for `usize`
note: required by a bound in `core::str::<impl str>::get_unchecked`
  --> $SRC_DIR/core/src/str/mod.rs:LL:COL
   |
LL |     pub const unsafe fn get_unchecked<I: ~const SliceIndex<str>>(&self, i: I) -> &I::Output {
   |                                          ^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `core::str::<impl str>::get_unchecked`

error[E0277]: the type `str` cannot be indexed by `char`
  --> $DIR/str-idx.rs:6:19
   |
LL |     let _: u8 = s['c'];
   |                   ^^^ string indices are ranges of `usize`
   |
   = help: the trait `SliceIndex<str>` is not implemented for `char`
   = note: required because of the requirements on the impl of `Index<char>` for `str`

error: aborting due to 4 previous errors

For more information about this error, try `rustc --explain E0277`.