src/test/ui/rfc-2632-const-trait-impl/const-trait-bound-opt-out/feature-gate.stock.stderr

error[E0658]: `?const` on trait bounds is experimental
  --> $DIR/feature-gate.rs:12:29
   |
LL | const fn get_assoc_const<S: ?const T>() -> i32 { <S as T>::CONST }
   |                             ^^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/67794
   = help: add `#![feature(const_trait_bound_opt_out)]` to the crate attributes to enable

error: aborting due to previous error

For more information about this error, try `rustc --explain E0658`.