rust/tests/ui/const-generics/issue-80471.stderr

warning: the feature `adt_const_params` is incomplete and may not be safe to use and/or cause compiler crashes
  --> $DIR/issue-80471.rs:1:12
   |
LL | #![feature(adt_const_params)]
   |            ^^^^^^^^^^^^^^^^
   |
   = note: see issue #95174 <https://github.com/rust-lang/rust/issues/95174> for more information
   = note: `#[warn(incomplete_features)]` on by default

error[E0741]: `Nat` must implement `ConstParamTy` to be used as the type of a const generic parameter
  --> $DIR/issue-80471.rs:10:17
   |
LL | fn foo<const N: Nat>() {}
   |                 ^^^
   |
help: add `#[derive(ConstParamTy)]` to the struct
   |
LL + #[derive(ConstParamTy)]
LL | enum Nat {
   |

error: aborting due to previous error; 1 warning emitted

For more information about this error, try `rustc --explain E0741`.