rustdoc: hang/OOM with recursive type #102910
Description
I tried this code from tests/ui/recursion/issue-38591-non-regular-dropck-recursion.rs
struct S<T> {
t: T,
s: Box<S<fn(u: T)>>,
}
fn f(x: S<u32>) {}
fn main() {
// Force instantiation.
f as fn(_);
}