gistfile1.txt

use std::marker::PhantomData;

#[derive(Debug)]
struct S<'a> {
    _pd: PhantomData<&'a mut &'a ()>
}

impl<'a> Drop for S<'a> { fn drop(&mut self) {} }

impl<'a> S<'a> {
    fn feed(&self, data: &'a [u8]) {
        drop(data);
    }
}

fn main() {
    let data = vec![];
    let s = S { _pd: PhantomData };
    // let data = vec![];
   
    s.feed(&data);
    dbg!(&s);
    
    drop(s);
    drop(data);
}