error: lifetime may not live long enough --> $DIR/coroutine-region-requirements.rs:12:51 | LL | fn dangle(x: &mut i32) -> &'static mut i32 { | - let's call the lifetime of this reference `'1` ... LL | CoroutineState::Complete(c) => return c, | ^ returning this value requires that `'1` must outlive `'static` error: aborting due to previous error