error[E0308]: mismatched types
  --> $DIR/generic-param-mismatch.rs:2:5
   |
LL | fn test<const N: usize, const M: usize>() -> [u8; M] {
   |                                              ------- expected `[u8; M]` because of return type
LL |     [0; N]
   |     ^^^^^^ expected `M`, found `N`
   |
   = note: expected array `[u8; M]`
              found array `[u8; N]`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0308`.