#![feature(pin)]
use std::marker::Pinned;

struct Hoge {
    _pin: Pinned
}

fn b(a: Hoge) -> Hoge {
    println!("{:p}", &a);
    a
}

fn main() {
  let a = Hoge {_pin: Pinned};
  println!("{:p}", &a);
  let a = b(a);
  println!("{:p}", &a);
}