error: `&'static ()` is forbidden as the type of a const generic parameter
  --> $DIR/transmute-const-param-static-reference.rs:7:23
   |
LL | struct Const<const P: &'static ()>;
   |                       ^^^^^^^^^^^
   |
   = note: the only supported types are integers, `bool` and `char`
   = help: add `#![feature(adt_const_params)]` to the crate attributes to enable more complex and user defined types

error: aborting due to 1 previous error