error[E0277]: the trait bound `for<'b> <T as UnsafeCopy<'b, T>>::Item: Deref` is not satisfied
  --> $DIR/hr-associated-type-projection-1.rs:15:17
   |
LL | trait UnsafeCopy<'a, T: Copy>
   |       ---------- required by a bound in this
LL | where
LL |     for<'b> <Self as UnsafeCopy<'b, T>>::Item: std::ops::Deref<Target = T>,
   |                                                --------------------------- required by this bound in `UnsafeCopy`
...
LL |     type Item = T;
   |                 ^ the trait `for<'b> Deref` is not implemented for `<T as UnsafeCopy<'b, T>>::Item`
   |
   = help: the following implementations were found:
             <&T as Deref>
             <&mut T as Deref>

error[E0277]: the trait bound `<T as UnsafeCopy<'b, T>>::Item: Deref` is not satisfied
  --> $DIR/hr-associated-type-projection-1.rs:13:33
   |
LL | impl<T: Copy + std::ops::Deref> UnsafeCopy<'_, T> for T {
   |                                 ^^^^^^^^^^^^^^^^^ the trait `Deref` is not implemented for `<T as UnsafeCopy<'b, T>>::Item`
   |
help: consider further restricting the associated type
   |
LL | impl<T: Copy + std::ops::Deref> UnsafeCopy<'_, T> for T where <T as UnsafeCopy<'b, T>>::Item: Deref {
   |                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0277`.