no suggestion to enable const generics features

[lcnr]

struct Bar<T, const N: T>(T);

results in

error[E0770]: the type of const parameters must not depend on other generic parameters
 --> src/lib.rs:1:24
  |
1 | struct Bar<T, const N: T, const M: u64 = N>(T);
  |                        ^ the type must not depend on the parameter `T`

For more information about this error, try `rustc --explain E0770`.
error: could not compile `playground` (lib) due to 1 previous error

It should suggest using feature(generic_const_parameter_types, adt_const_params) on nightly