This is overdue, even if range and RangeArgument is still unstable.
The stability attributes are the same ones as the other unstable item
(Bound) here, they don't seem to matter.
#[stable(feature = "rust1", since = "1.0.0")]
pub use self::hash_set::HashSet;
+#[stable(feature = "rust1", since = "1.0.0")]
+pub use core_collections::range;
+
mod hash;
#[stable(feature = "rust1", since = "1.0.0")]
#![feature(char_internals)]
#![feature(collections)]
#![feature(collections_bound)]
+#![feature(collections_range)]
#![feature(compiler_builtins_lib)]
#![feature(const_fn)]
#![feature(core_float)]