type Bar<'a, 'b> = Box<dyn PartialEq<Bar<'a, 'b>>>;
//~^ ERROR cycle detected when expanding type alias
fn bar<'a, 'b>(i: &'a i32) -> Bar<'a, 'b> {
Box::new(i)
}
fn main() {
let meh = 42;
let muh = 42;
assert!(bar(&meh) == bar(&muh));