error: `&'static ()` is forbidden as the type of a const generic parameter --> $DIR/transmute-const-param-static-reference.rs:7:23 | LL | struct Const; | ^^^^^^^^^^^ | = 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