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// This test should never pass!
use std::cell::RefCell;
use std::rc::Rc;
trait Swap: Sized {
fn swap(self, other: Self);
}
impl<T> Swap for Rc<RefCell<T>> {
fn swap(self, other: Self) {
<RefCell<T>>::swap(&self, &other);
}
}
fn hide<'a, 'b: 'a, T: 'static>(x: Rc<RefCell<&'b T>>) -> impl Swap + 'a {
x
//~^ ERROR hidden type for `impl Swap + 'a` captures lifetime that does not appear in bounds
}
fn dangle() -> &'static [i32; 3] {
let long = Rc::new(RefCell::new(&[4, 5, 6]));
let x = [1, 2, 3];
let short = Rc::new(RefCell::new(&x));
hide(long.clone()).swap(hide(short));
let res: &'static [i32; 3] = *long.borrow();
res
}
fn main() {
println!("{:?}", dangle());
}
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