fn main() {
    match 1 { //~ ERROR non-exhaustive patterns
        //~^ patterns `i32::MIN..=3_i32` and `5_i32..=i32::MAX` not covered
        //~| the matched value is of type `i32`
        x => {} //~ this pattern doesn't introduce a new catch-all binding
        //~^ HELP ensure that all possible cases are being handled
        //~| HELP if you meant to introduce a binding, use a different name
    }
    const x: i32 = 4; //~ NOTE constant `x` defined here
}