You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: reversed_empty_ranges_unfixable.rs
    path of file: ./repos/rust-clippy/tests/ui
    
    the code of the file until where you have to start completion: #![warn(clippy::reversed_empty_ranges)]

const ANSWER: i32 = 42;
const SOME_NU
    
fn main() {
    let arr = [1, 2, 3, 4, 5];
    let _ = &arr[3usize..=1usize];
    //~^ ERROR: this range is reversed and using it to index a slice will panic at run-tim
    //~| NOTE: `-D clippy::reversed-empty-ranges` implied by `-D warnings`
    let _ = &arr[SOME_NUM..1];
    //~^ ERROR: this range is reversed and using it to index a slice will panic at run-tim

    for _ in ANSWER..ANSWER {}
    //~^ ERROR: this range is empty so it will yield no values

    // Should not be linted, see issue #5689
    let _ = (42 + 10..42 + 10).map(|x| x / 2).find(|&x| x == 21);
}