error: this range is empty so it will yield no values
  --> $DIR/reversed_empty_ranges_unfixable.rs:7:13
   |
LL |     let _ = (42 + 10..42 + 10).map(|x| x / 2).find(|&x| x == 21);
   |             ^^^^^^^^^^^^^^^^^^
   |
   = note: `-D clippy::reversed-empty-ranges` implied by `-D warnings`

error: this range is reversed and using it to index a slice will panic at run-time
  --> $DIR/reversed_empty_ranges_unfixable.rs:10:18
   |
LL |     let _ = &arr[3usize..=1usize];
   |                  ^^^^^^^^^^^^^^^

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:13:14
   |
LL |     for _ in ANSWER..ANSWER {}
   |              ^^^^^^^^^^^^^^

error: aborting due to 4 previous errors