error: unconstrained generic constant
  --> $DIR/abstract-consts-as-cast-5.rs:5:11
   |
LL |     bar::<{ N as usize as usize }>();
   |           ^^^^^^^^^^^^^^^^^^^^^^^
   |
help: try adding a `where` bound
   |
LL | fn foo<const N: u8>(a: [(); N as usize]) where [(); { N as usize as usize }]: {
   |                                          ++++++++++++++++++++++++++++++++++++

error: aborting due to 1 previous error