error[E0275]: overflow evaluating the requirement `<T as Foo>::Item: Sized`
  --> $DIR/projection-bound-cycle.rs:46:5
   |
LL | struct OnlySized<T> where T: Sized { f: T }
   |                  - required by this bound in `OnlySized`
...
LL |     type Assoc = OnlySized<<T as Foo>::Item>;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to previous error

For more information about this error, try `rustc --explain E0275`.