warning: private type `fn(u8) -> u8 {my_const_fn}` in public interface (error E0446)
  --> $DIR/eval-privacy.rs:12:1
   |
LL | / impl<const U: u8> Trait for Const<U>
LL | |
LL | |
LL | |
...  |
LL | |     }
LL | | }
   | |_^
   |
   = note: `#[warn(private_in_public)]` on by default
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>

warning: private type `fn(u8) -> u8 {my_const_fn}` in public interface (error E0446)
  --> $DIR/eval-privacy.rs:12:1
   |
LL | / impl<const U: u8> Trait for Const<U>
LL | |
LL | |
LL | |
...  |
LL | |     }
LL | | }
   | |_^
   |
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>

error[E0446]: private type `fn(u8) -> u8 {my_const_fn}` in public interface
  --> $DIR/eval-privacy.rs:21:5
   |
LL |     type AssocTy = Const<{ my_const_fn(U) }>;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't leak private type
...
LL | const fn my_const_fn(val: u8) -> u8 {
   | ----------------------------------- `fn(u8) -> u8 {my_const_fn}` declared as private

error: aborting due to previous error; 2 warnings emitted

For more information about this error, try `rustc --explain E0446`.