File: issue-87750.rs

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rustc 1.86.0%2Bdfsg1-1
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//@ check-pass

trait PointerFamily {
    type Pointer<T>;
}

struct Rc<T>(Box<T>);
struct RcFamily;

impl PointerFamily for RcFamily {
    type Pointer<T> = Rc<T>;
}

#[allow(dead_code)]
enum Node<T, P: PointerFamily>
where
    P::Pointer<Node<T, P>>: Sized,
{
    Cons(P::Pointer<Node<T, P>>),
}

fn main() {
    let _list: <RcFamily as PointerFamily>::Pointer<Node<i32, RcFamily>>;
}