rust/tests/ui/traits/object/bounds-cycle-4.rs

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// Check that we don't have a cycle when we try to normalize `Self::U` in the
// bound below. Make sure that having a lifetime on the trait object doesn't break things
//@ check-pass
trait Is {
type T;
}
impl<U> Is for U {
type T = U;
}
trait Obj<'a> {
type U: Is<T = Self::V>;
type V;
}
fn is_obj<'a, T: ?Sized + Obj<'a>>(_: &T) {}
fn f<'a>(x: &dyn Obj<'a, U = i32, V = i32>) {
is_obj(x)
}
fn main() {}