error: suggestions on deprecated items are unstable
  --> $DIR/feature-gate-deprecated_suggestion.rs:5:14
   |
LL | #[deprecated(suggestion = "foo")]
   |              ^^^^^^^^^^^^^^^^^^
   |
   = help: add `#![feature(deprecated_suggestion)]` to the crate root
   = note: see #94785 for more details

error: aborting due to 1 previous error