error[E0658]: the `#[deprecated_safe]` attribute is an experimental feature --> $DIR/feature-gate-deprecated_safe.rs:1:1 | LL | #[deprecated_safe(since = "TBD", note = "...")] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = note: see issue #94978 for more information = help: add `#![feature(deprecated_safe)]` to the crate attributes to enable error[E0658]: the `#[deprecated_safe]` attribute is an experimental feature --> $DIR/feature-gate-deprecated_safe.rs:4:1 | LL | #[deprecated_safe(since = "TBD", note = "...")] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = note: see issue #94978 for more information = help: add `#![feature(deprecated_safe)]` to the crate attributes to enable error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0658`.