error: this range is reversed and using it to index a slice will panic at run-time
  --> $DIR/reversed_empty_ranges_unfixable.rs:8:18
   |
LL |     let _ = &arr[3usize..=1usize];
   |                  ^^^^^^^^^^^^^^^
   |
   = note: `-D clippy::reversed-empty-ranges` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::reversed_empty_ranges)]`

error: this range is reversed and using it to index a slice will panic at run-time
  --> $DIR/reversed_empty_ranges_unfixable.rs:11:18
   |
LL |     let _ = &arr[SOME_NUM..1];
   |                  ^^^^^^^^^^^

error: this range is empty so it will yield no values
  --> $DIR/reversed_empty_ranges_unfixable.rs:14:14
   |
LL |     for _ in ANSWER..ANSWER {}
   |              ^^^^^^^^^^^^^^

error: aborting due to 3 previous errors