#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#[derive(Debug, Eq, PartialEq)]
struct SomeErr;
fn main() {
    let x: Option<Result<i32, SomeErr>> = Some(Ok(5));
    let y: Result<Option<i32>, SomeErr> = Ok(Some(5));
    assert_eq!(x.transpose(), y);
}