error: unnecessary parentheses around index expression
  --> $DIR/issue-96606.rs:4:17
   |
LL |     let _ = arr[(0)];
   |                 ^ ^
   |
note: the lint level is defined here
  --> $DIR/issue-96606.rs:1:8
   |
LL | #[deny(unused)]
   |        ^^^^^^
   = note: `#[deny(unused_parens)]` implied by `#[deny(unused)]`
help: remove these parentheses
   |
LL -     let _ = arr[(0)];
LL +     let _ = arr[0];
   |

error: unnecessary braces around index expression
  --> $DIR/issue-96606.rs:5:17
   |
LL |     let _ = arr[{0}];
   |                 ^ ^
   |
   = note: `#[deny(unused_braces)]` implied by `#[deny(unused)]`
help: remove these braces
   |
LL -     let _ = arr[{0}];
LL +     let _ = arr[0];
   |

error: aborting due to 2 previous errors