#![feature(coroutine_trait)] #![feature(coroutines)] use std::ops::Coroutine; fn capture() -> impl Coroutine { let b: [u8] = *(Box::new([]) as Box<[u8]>); //~ERROR he size for values of type `[u8]` cannot be known at compilation time #[coroutine] move || { println!("{:?}", &b); yield; for elem in b.iter() {} } } fn main() { capture(); }