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// Issue 36278: On an unsized struct with >1 level of nontrivial
// nesting, ensure we are computing dynamic size of prefix correctly.
use std::mem;
const SZ: usize = 100;
struct P<T: ?Sized>(#[allow(dead_code)] [u8; SZ], T);
type Ack<T> = P<P<T>>;
fn main() {
let size_of_sized;
let size_of_unsized;
let x: Box<Ack<[u8; 0]>> = Box::new(P([0; SZ], P([0; SZ], [0; 0])));
size_of_sized = mem::size_of_val::<Ack<_>>(&x);
let align_of_sized = mem::align_of_val::<Ack<_>>(&x);
let y: Box<Ack<[u8]>> = x;
size_of_unsized = mem::size_of_val::<Ack<_>>(&y);
assert_eq!(size_of_sized, size_of_unsized);
assert_eq!(align_of_sized, 1);
assert_eq!(mem::align_of_val::<Ack<_>>(&y), 1);
}
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