diff --git a/src/liballoc/tests/lib.rs b/src/liballoc/tests/lib.rs
index 1c8ff316e55aa..081c473768f1f 100644
--- a/src/liballoc/tests/lib.rs
+++ b/src/liballoc/tests/lib.rs
@@ -25,7 +25,6 @@
 #![feature(try_reserve)]
 #![feature(unboxed_closures)]
 #![feature(exact_chunks)]
-#![feature(inclusive_range_methods)]
 
 extern crate alloc_system;
 extern crate core;
diff --git a/src/libcore/ops/range.rs b/src/libcore/ops/range.rs
index 1f84631ada3a1..7c6e2447bdb7f 100644
--- a/src/libcore/ops/range.rs
+++ b/src/libcore/ops/range.rs
@@ -318,8 +318,6 @@ impl<Idx: PartialOrd<Idx>> RangeTo<Idx> {
 /// # Examples
 ///
 /// ```
-/// #![feature(inclusive_range_methods)]
-///
 /// assert_eq!((3..=5), std::ops::RangeInclusive::new(3, 5));
 /// assert_eq!(3 + 4 + 5, (3..=5).sum());
 ///
@@ -345,12 +343,11 @@ impl<Idx> RangeInclusive<Idx> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(inclusive_range_methods)]
     /// use std::ops::RangeInclusive;
     ///
     /// assert_eq!(3..=5, RangeInclusive::new(3, 5));
     /// ```
-    #[unstable(feature = "inclusive_range_methods", issue = "49022")]
+    #[stable(feature = "inclusive_range_methods", since = "1.27.0")]
     #[inline]
     pub const fn new(start: Idx, end: Idx) -> Self {
         Self { start, end }
@@ -363,17 +360,18 @@ impl<Idx> RangeInclusive<Idx> {
     /// whether the inclusive range is empty, use the [`is_empty()`] method
     /// instead of comparing `start() > end()`.
     ///
+    /// Note: the value returned by this method is unspecified after the range
+    /// has been iterated to exhaustion.
+    ///
     /// [`end()`]: #method.end
     /// [`is_empty()`]: #method.is_empty
     ///
     /// # Examples
     ///
     /// ```
-    /// #![feature(inclusive_range_methods)]
-    ///
     /// assert_eq!((3..=5).start(), &3);
     /// ```
-    #[unstable(feature = "inclusive_range_methods", issue = "49022")]
+    #[stable(feature = "inclusive_range_methods", since = "1.27.0")]
     #[inline]
     pub fn start(&self) -> &Idx {
         &self.start
@@ -386,32 +384,34 @@ impl<Idx> RangeInclusive<Idx> {
     /// whether the inclusive range is empty, use the [`is_empty()`] method
     /// instead of comparing `start() > end()`.
     ///
+    /// Note: the value returned by this method is unspecified after the range
+    /// has been iterated to exhaustion.
+    ///
     /// [`start()`]: #method.start
     /// [`is_empty()`]: #method.is_empty
     ///
     /// # Examples
     ///
     /// ```
-    /// #![feature(inclusive_range_methods)]
-    ///
     /// assert_eq!((3..=5).end(), &5);
     /// ```
-    #[unstable(feature = "inclusive_range_methods", issue = "49022")]
+    #[stable(feature = "inclusive_range_methods", since = "1.27.0")]
     #[inline]
     pub fn end(&self) -> &Idx {
         &self.end
     }
 
-    /// Destructures the RangeInclusive into (lower bound, upper (inclusive) bound).
+    /// Destructures the `RangeInclusive` into (lower bound, upper (inclusive) bound).
+    ///
+    /// Note: the value returned by this method is unspecified after the range
+    /// has been iterated to exhaustion.
     ///
     /// # Examples
     ///
     /// ```
-    /// #![feature(inclusive_range_methods)]
-    ///
     /// assert_eq!((3..=5).into_inner(), (3, 5));
     /// ```
-    #[unstable(feature = "inclusive_range_methods", issue = "49022")]
+    #[stable(feature = "inclusive_range_methods", since = "1.27.0")]
     #[inline]
     pub fn into_inner(self) -> (Idx, Idx) {
         (self.start, self.end)
diff --git a/src/libcore/tests/lib.rs b/src/libcore/tests/lib.rs
index 8c481338945ff..cd6b5c6a4ad4c 100644
--- a/src/libcore/tests/lib.rs
+++ b/src/libcore/tests/lib.rs
@@ -42,7 +42,6 @@
 #![feature(try_trait)]
 #![feature(exact_chunks)]
 #![feature(reverse_bits)]
-#![feature(inclusive_range_methods)]
 #![feature(iterator_find_map)]
 #![feature(slice_internals)]
 
diff --git a/src/librustc/lib.rs b/src/librustc/lib.rs
index bbd684982fa41..1d53a305193fa 100644
--- a/src/librustc/lib.rs
+++ b/src/librustc/lib.rs
@@ -68,7 +68,6 @@
 #![feature(trusted_len)]
 #![feature(catch_expr)]
 #![feature(test)]
-#![feature(inclusive_range_methods)]
 
 #![recursion_limit="512"]
 
diff --git a/src/librustc_codegen_llvm/lib.rs b/src/librustc_codegen_llvm/lib.rs
index bd053da4bd303..0b0bab96dfdfd 100644
--- a/src/librustc_codegen_llvm/lib.rs
+++ b/src/librustc_codegen_llvm/lib.rs
@@ -29,7 +29,6 @@
 #![feature(rustc_diagnostic_macros)]
 #![feature(slice_sort_by_cached_key)]
 #![feature(optin_builtin_traits)]
-#![feature(inclusive_range_methods)]
 
 use rustc::dep_graph::WorkProduct;
 use syntax_pos::symbol::Symbol;
diff --git a/src/librustc_mir/lib.rs b/src/librustc_mir/lib.rs
index d9b6c406e2012..3bf9453fb513c 100644
--- a/src/librustc_mir/lib.rs
+++ b/src/librustc_mir/lib.rs
@@ -29,7 +29,6 @@ Rust MIR: a lowered representation of Rust. Also: an experiment!
 #![feature(exhaustive_patterns)]
 #![feature(range_contains)]
 #![feature(rustc_diagnostic_macros)]
-#![feature(inclusive_range_methods)]
 #![feature(crate_visibility_modifier)]
 #![feature(never_type)]
 #![feature(specialization)]
diff --git a/src/librustc_target/lib.rs b/src/librustc_target/lib.rs
index 45f2ee13bbdc9..8f4911574398b 100644
--- a/src/librustc_target/lib.rs
+++ b/src/librustc_target/lib.rs
@@ -29,7 +29,6 @@
 #![feature(const_fn)]
 #![feature(fs_read_write)]
 #![feature(inclusive_range)]
-#![feature(inclusive_range_methods)]
 #![feature(slice_patterns)]
 
 #[macro_use]