#![feature(coroutines, coroutine_trait)] use std::ops::Coroutine; use std::pin::Pin; fn main() { let _b = { let a = 3; Pin::new(&mut || yield &a).resume(()) //~^ ERROR: `a` does not live long enough }; let _b = { let a = 3; || { yield &a //~^ ERROR: `a` does not live long enough } }; }