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// This issue reproduces an ICE on compile (E.g. fails on 2018-12-19 nightly).
// "cannot relate bound region: ReLateBound(DebruijnIndex(1), BrAnon(1)) <= '_#1r"
// run-pass
// edition:2018
#![feature(generators,generator_trait)]
use std::ops::Generator;
fn with<F>(f: F) -> impl Generator<Yield=(), Return=()>
where F: Fn() -> ()
{
move || {
loop {
match f() {
_ => yield,
}
}
}
}
fn main() {
let data = &vec![1];
|| { //~ WARN unused generator that must be used
let _to_pin = with(move || println!("{:p}", data));
loop {
yield
}
};
}
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