error[E0637]: `'_` cannot be used here
  --> $DIR/normalizing_with_unconstrained_impl_params.rs:9:32
   |
LL | struct ConstChunksExact<'a, T: '_, const assert: usize> {}
   |                                ^^ `'_` is a reserved lifetime name

error[E0308]: mismatched types
  --> $DIR/normalizing_with_unconstrained_impl_params.rs:13:83
   |
LL | impl<'a, T: std::fmt::Debug, const N: usize> Iterator for ConstChunksExact<'a, T, {}> {
   |                                                                                   ^^ expected `usize`, found `()`

error[E0046]: not all trait items implemented, missing: `Item`
  --> $DIR/normalizing_with_unconstrained_impl_params.rs:4:1
   |
LL | impl<'a, T: std::fmt::Debug, const N: usize> Iterator for ConstChunksExact<'a, T, { N }> {
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ missing `Item` in implementation
   |
   = help: implement the missing item: `type Item = /* Type */;`

error[E0392]: lifetime parameter `'a` is never used
  --> $DIR/normalizing_with_unconstrained_impl_params.rs:9:25
   |
LL | struct ConstChunksExact<'a, T: '_, const assert: usize> {}
   |                         ^^ unused lifetime parameter
   |
   = help: consider removing `'a`, referring to it in a field, or using a marker such as `PhantomData`

error[E0392]: type parameter `T` is never used
  --> $DIR/normalizing_with_unconstrained_impl_params.rs:9:29
   |
LL | struct ConstChunksExact<'a, T: '_, const assert: usize> {}
   |                             ^ unused type parameter
   |
   = help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`

error[E0207]: the const parameter `N` is not constrained by the impl trait, self type, or predicates
  --> $DIR/normalizing_with_unconstrained_impl_params.rs:13:30
   |
LL | impl<'a, T: std::fmt::Debug, const N: usize> Iterator for ConstChunksExact<'a, T, {}> {
   |                              ^^^^^^^^^^^^^^ unconstrained const parameter
   |
   = note: expressions using a const parameter must map each value to a distinct output value
   = note: proving the result of expressions other than the parameter are unique is not supported

error[E0308]: mismatched types
  --> $DIR/normalizing_with_unconstrained_impl_params.rs:6:27
   |
LL |     fn next(&mut self) -> Option<Self::Item> {}
   |        ----               ^^^^^^^^^^^^^^^^^^ expected `Option<_>`, found `()`
   |        |
   |        implicitly returns `()` as its body has no tail or `return` expression
   |
   = note:   expected enum `Option<_>`
           found unit type `()`

error: aborting due to 7 previous errors

Some errors have detailed explanations: E0046, E0207, E0308, E0392, E0637.
For more information about an error, try `rustc --explain E0046`.