error: `[usize; 1]` is forbidden as the type of a const generic parameter
  --> $DIR/different_byref.rs:8:23
   |
LL | struct Const<const V: [usize; 1]> {}
   |                       ^^^^^^^^^^
   |
   = note: the only supported types are integers, `bool` and `char`
   = help: more complex types are supported with `#[feature(const_generics)]`

error: aborting due to previous error