error[E0277]: the size for values of type `T` cannot be known at compilation time
  --> $DIR/feature-gate-lazy_normalization_consts.rs:6:23
   |
LL | pub const fn sof<T>() -> usize {
   |                  - required by this bound in `sof`
...
LL | fn test<T>() {
   |         - this type parameter needs to be `std::marker::Sized`
LL |     let _: [u8; sof::<T>()];
   |                       ^ doesn't have a size known at compile-time
   |
   = help: the trait `std::marker::Sized` is not implemented for `T`
   = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
help: consider relaxing the implicit `Sized` restriction
   |
LL | pub const fn sof<T: ?Sized>() -> usize {
   |                   ^^^^^^^^

error: aborting due to previous error

For more information about this error, try `rustc --explain E0277`.