#![allow(unused)]

use std::sync::Arc;

struct S<'a> {
    data: &'a u32,
}

impl<'a> S<'a> {
    fn get(&self) -> u32 {
        *self.data
    }

    // This works
    fn make_and_run(&self) -> u32{
        let cl = || {self.get()};

        cl()
    }

    // This does not ...
    fn make(&self) -> Arc<Box<dyn Fn() -> u32 + 'a>> {
        let cl = || {self.get()};
        Arc::new(Box::new(cl))
    }
}

fn main() {
    let mut i = 1;
    let mut s = S {data: & i};

    println!("data = {}", s.get());
    println!("data = {}", s.make_and_run())
}