1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
// check-fail
// known-bug: unknown
// This gives us problems because `for<'a> I::Item<'a>: Debug` should mean "for
// all 'a where I::Item<'a> is WF", but really means "for all 'a possible"
use std::fmt::Debug;
pub trait LendingIterator {
type Item<'this>
where
Self: 'this;
}
pub struct WindowsMut<'x> {
slice: &'x (),
}
impl<'y> LendingIterator for WindowsMut<'y> {
type Item<'this> = &'this mut () where 'y: 'this;
}
fn print_items<I>(_iter: I)
where
I: LendingIterator,
for<'a> I::Item<'a>: Debug,
{
}
fn main() {
let slice = &mut ();
let windows = WindowsMut { slice };
print_items::<WindowsMut<'_>>(windows);
}
|
