#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use core::mem;
use core::fmt::Debug;
#[repr(C)]
pub struct Struct<T: ?Sized> {
    a: u8,
    b: T,
}
#[derive(Debug)]
#[repr(C, align(4))]
struct Align4(u32);
fn main() {
    assert_eq!(mem::offset_of!(Struct < dyn Debug >, a), 0);
    assert_eq!(mem::offset_of!(Struct < Align4 >, b), 4);
    let value: Struct<Align4> = Struct { a: 1, b: Align4(2) };
    let ref_unsized: &Struct<dyn Debug> = &value;
    let offset_of_b = unsafe {
        (&raw const ref_unsized.b).byte_offset_from_unsigned(ref_unsized)
    };
    assert_eq!(offset_of_b, 4);
}