Set unstable feature names appropriately

* `core` - for the core crate
* `hash` - hashing
* `io` - io
* `path` - path
* `alloc` - alloc crate
* `rand` - rand crate
* `collections` - collections crate
* `std_misc` - other parts of std
* `test` - test crate
* `rustc_private` - everything else

1 files changed, 2 insertions, 1 deletions

diff --git a/src/driver/driver.rs b/src/driver/driver.rs
index 6e436ec41d5..601f130341b 100644
--- a/src/driver/driver.rs
+++ b/src/driver/driver.rs
@@ -9,7 +9,8 @@
 // except according to those terms.
 
 #![allow(unknown_features)]
-#![feature(unnamed_feature)]
+#![cfg_attr(rustc, feature(rustc_private))]
+#![cfg_attr(rustdoc, feature(rustdoc))]
 
 #[cfg(rustdoc)]
 extern crate "rustdoc" as this;