diff --git a/src/doc/unstable-book/src/library-features/iterator-for-each.md b/src/doc/unstable-book/src/library-features/iterator-for-each.md
deleted file mode 100644
index ebeb5f6a1de51..0000000000000
--- a/src/doc/unstable-book/src/library-features/iterator-for-each.md
+++ /dev/null
@@ -1,17 +0,0 @@
-# `iterator_for_each`
-
-The tracking issue for this feature is: [#42986]
-
-[#42986]: https://github.com/rust-lang/rust/issues/42986
-
-------------------------
-
-To call a closure on each element of an iterator, you can use `for_each`:
-
-```rust
-#![feature(iterator_for_each)]
-
-fn main() {
-    (0..10).for_each(|i| println!("{}", i));
-}
-```
diff --git a/src/libcore/iter/iterator.rs b/src/libcore/iter/iterator.rs
index 7c009114afefb..edafd0ce2c227 100644
--- a/src/libcore/iter/iterator.rs
+++ b/src/libcore/iter/iterator.rs
@@ -498,8 +498,6 @@ pub trait Iterator {
     /// Basic usage:
     ///
     /// ```
-    /// #![feature(iterator_for_each)]
-    ///
     /// use std::sync::mpsc::channel;
     ///
     /// let (tx, rx) = channel();
@@ -514,15 +512,13 @@ pub trait Iterator {
     /// might be preferable to keep a functional style with longer iterators:
     ///
     /// ```
-    /// #![feature(iterator_for_each)]
-    ///
     /// (0..5).flat_map(|x| x * 100 .. x * 110)
     ///       .enumerate()
     ///       .filter(|&(i, x)| (i + x) % 3 == 0)
     ///       .for_each(|(i, x)| println!("{}:{}", i, x));
     /// ```
     #[inline]
-    #[unstable(feature = "iterator_for_each", issue = "42986")]
+    #[stable(feature = "iterator_for_each", since = "1.22.0")]
     fn for_each<F>(self, mut f: F) where
         Self: Sized, F: FnMut(Self::Item),
     {
diff --git a/src/tools/rls b/src/tools/rls
index 52d48656f93ee..7221e38023c41 160000
--- a/src/tools/rls
+++ b/src/tools/rls
@@ -1 +1 @@
-Subproject commit 52d48656f93eeeb2c568e6c1048e64168e5b209f
+Subproject commit 7221e38023c41ff2532ebbf54a7da296fd488b50