#![allow(dead_code, deprecated, unused_variables, unused_mut)]
fn bar(x: i32) {}
fn main() {
    let not_bar_ptr = bar;
    assert_eq!(size_of_val(& not_bar_ptr), 0);
    let bar_ptr: fn(i32) = not_bar_ptr;
    assert_eq!(size_of_val(& bar_ptr), size_of::< usize > ());
    let footgun = &bar;
}