#![allow(dead_code, deprecated, unused_variables, unused_mut)]
fn some_expensive_computation() -> bool {
    true
}
fn main() {
    debug_assert!(true);
    debug_assert!(some_expensive_computation());
    let x = true;
    debug_assert!(x, "x wasn't true!");
    let a = 3;
    let b = 27;
    debug_assert!(a + b == 30, "a = {}, b = {}", a, b);
}