error[E0530]: let bindings cannot shadow const parameters
  --> $DIR/issue-85348.rs:6:17
   |
LL | impl<const N: usize> ArrayWindowsExample {
   |            - the const parameter `N` is defined here
...
LL |         let mut N;
   |                 ^ cannot be named the same as a const parameter

error[E0412]: cannot find type `ArrayWindowsExample` in this scope
  --> $DIR/issue-85348.rs:3:22
   |
LL | impl<const N: usize> ArrayWindowsExample {
   |                      ^^^^^^^^^^^^^^^^^^^ not found in this scope

error[E0282]: type annotations needed
  --> $DIR/issue-85348.rs:6:13
   |
LL |         let mut N;
   |             ^^^^^
   |
help: consider giving `N` an explicit type
   |
LL |         let mut N: /* Type */;
   |                  ++++++++++++

error: aborting due to 3 previous errors

Some errors have detailed explanations: E0282, E0412, E0530.
For more information about an error, try `rustc --explain E0282`.