error[E0445]: private trait `Foo` in public interface
  --> $DIR/E0445.rs:15:1
   |
15 | pub trait Bar : Foo {}
   | ^^^^^^^^^^^^^^^^^^^^^^ can't leak private trait

error[E0445]: private trait `Foo` in public interface
  --> $DIR/E0445.rs:18:1
   |
18 | pub struct Bar2<T: Foo>(pub T);
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't leak private trait

error[E0445]: private trait `Foo` in public interface
  --> $DIR/E0445.rs:21:1
   |
21 | pub fn foo<T: Foo> (t: T) {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't leak private trait

error: aborting due to 3 previous errors

If you want more information on this error, try using "rustc --explain E0445"