error[E0658]: `crate` in paths is experimental (see issue #45477)
  --> $DIR/feature-gate-crate_in_paths.rs:14:15
   |
LL |     let _ = ::crate::S; //~ ERROR `crate` in paths is experimental
   |               ^^^^^
   |
   = help: add #![feature(crate_in_paths)] to the crate attributes to enable

error: aborting due to previous error

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