error[E0658]: lint reasons are experimental
  --> $DIR/feature-gate-lint-reasons.rs:1:28
   |
LL | #![warn(nonstandard_style, reason = "the standard should be respected")]
   |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/54503
   = help: add `#![feature(lint_reasons)]` to the crate attributes to enable

error: aborting due to previous error

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