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