1 #![feature(generators, generator_trait)]
3 use std::ops::{Generator, GeneratorState};
6 struct SetToNone<'a: 'b, 'b>(&'b mut Option<&'a i32>);
8 impl<'a, 'b> Drop for SetToNone<'a, 'b> {
14 fn drop_using_generator() -> i32 {
19 let mut g = move |r| {
20 let _s = SetToNone(r);
23 let mut g = Pin::new(&mut g);
25 r = y.as_ref().unwrap();
26 //~^ ERROR cannot borrow `y` as immutable because it is also borrowed as mutable
32 println!("{}", drop_using_generator());