error[E0119]: conflicting implementations of trait `CoerceUnsized<&Wrapper<_>>` for type `&Wrapper<_>`
  --> $DIR/E0476.rs:9:1
   |
LL | impl<'a, 'b, T, S> CoerceUnsized<&'a Wrapper<T>> for &'b Wrapper<S> where S: Unsize<T> {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: conflicting implementation in crate `core`:
           - impl<'a, 'b, T, U> CoerceUnsized<&'a U> for &'b T
             where 'b: 'a, T: Unsize<U>, T: ?Sized, U: ?Sized;

error[E0476]: lifetime of the source pointer does not outlive lifetime bound of the object type
  --> $DIR/E0476.rs:9:1
   |
LL | impl<'a, 'b, T, S> CoerceUnsized<&'a Wrapper<T>> for &'b Wrapper<S> where S: Unsize<T> {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
note: object type is valid for the lifetime `'a` as defined here
  --> $DIR/E0476.rs:9:6
   |
LL | impl<'a, 'b, T, S> CoerceUnsized<&'a Wrapper<T>> for &'b Wrapper<S> where S: Unsize<T> {}
   |      ^^
note: source pointer is only valid for the lifetime `'b` as defined here
  --> $DIR/E0476.rs:9:10
   |
LL | impl<'a, 'b, T, S> CoerceUnsized<&'a Wrapper<T>> for &'b Wrapper<S> where S: Unsize<T> {}
   |          ^^

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0119, E0476.
For more information about an error, try `rustc --explain E0119`.