error[E0658]: `cfg(version)` is experimental and subject to change
  --> $DIR/feature-gate-cfg-version.rs:5:7
   |
LL | #[cfg(version("1.42"))]
   |       ^^^^^^^^^^^^^^^
   |
   = note: see issue #64796 <https://github.com/rust-lang/rust/issues/64796> for more information
   = help: add `#![feature(cfg_version)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date

error[E0658]: `cfg(version)` is experimental and subject to change
  --> $DIR/feature-gate-cfg-version.rs:10:18
   |
LL |     assert!(cfg!(version("1.42")));
   |                  ^^^^^^^^^^^^^^^
   |
   = note: see issue #64796 <https://github.com/rust-lang/rust/issues/64796> for more information
   = help: add `#![feature(cfg_version)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date

error: aborting due to 2 previous errors

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