src/test/ui/feature-gate-doc_cfg.stderr

   1 error: #[doc(cfg(...))] is experimental (see issue #43781)
   2   --> $DIR/feature-gate-doc_cfg.rs:11:1
   3    |
   4 11 | #[doc(cfg(unix))] //~ ERROR: #[doc(cfg(...))] is experimental
   5    | ^^^^^^^^^^^^^^^^^
   6    |
   7    = help: add #![feature(doc_cfg)] to the crate attributes to enable
   8
   9 error: aborting due to previous error
  10