tests/ui/traits/object/dyn-iter-box-and-ref-impl-iter.rs

//! Regression test for <https://github.com/rust-lang/rust/issues/20953>.
//! Ensure both boxed and ref Iterator trait object implement Iterator.

//@ run-pass
#![allow(unused_mut)]
#![allow(unused_variables)]
fn main() {
    let mut shrinker: Box<dyn Iterator<Item=i32>> = Box::new(vec![1].into_iter());
    println!("{:?}", shrinker.next());
    for v in shrinker { assert!(false); }

    let mut shrinker: &mut dyn Iterator<Item=i32> = &mut vec![1].into_iter();
    println!("{:?}", shrinker.next());
    for v in shrinker { assert!(false); }
}