Keep the fields of RangeInclusive unstable.

src/liballoc/lib.rs

@@ -123,6 +123,7 @@
 #![feature(on_unimplemented)]
 #![feature(exact_chunks)]
 #![feature(pointer_methods)]
+#![feature(inclusive_range_fields)]
 
 #![cfg_attr(not(test), feature(fn_traits, placement_new_protocol, swap_with_slice, i128))]
 #![cfg_attr(test, feature(test, box_heap))]

src/liballoc/tests/lib.rs

@@ -29,6 +29,7 @@
 #![feature(unboxed_closures)]
 #![feature(unicode)]
 #![feature(exact_chunks)]
+#![feature(inclusive_range_fields)]
 
 extern crate alloc_system;
 extern crate std_unicode;

src/libcore/ops/range.rs

@@ -283,6 +283,8 @@ impl<Idx: PartialOrd<Idx>> RangeTo<Idx> {
 /// # Examples
 ///
 /// ```
+/// #![feature(inclusive_range_fields)]
+///
 /// assert_eq!((3..=5), std::ops::RangeInclusive { start: 3, end: 5 });
 /// assert_eq!(3 + 4 + 5, (3..=5).sum());
 ///
@@ -294,10 +296,10 @@ impl<Idx: PartialOrd<Idx>> RangeTo<Idx> {
 #[stable(feature = "inclusive_range", since = "1.26.0")]
 pub struct RangeInclusive<Idx> {
     /// The lower bound of the range (inclusive).
-    #[stable(feature = "inclusive_range", since = "1.26.0")]
+    #[unstable(feature = "inclusive_range_fields", issue = "49022")]
     pub start: Idx,
     /// The upper bound of the range (inclusive).
-    #[stable(feature = "inclusive_range", since = "1.26.0")]
+    #[unstable(feature = "inclusive_range_fields", issue = "49022")]
     pub end: Idx,
 }
 

src/libcore/tests/lib.rs

@@ -47,6 +47,7 @@
 #![feature(exact_chunks)]
 #![feature(atomic_nand)]
 #![feature(reverse_bits)]
+#![feature(inclusive_range_fields)]
 
 extern crate core;
 extern crate test;

src/librustc/lib.rs

@@ -75,6 +75,7 @@
 #![feature(trusted_len)]
 #![feature(catch_expr)]
 #![feature(test)]
+#![feature(inclusive_range_fields)]
 
 #![recursion_limit="512"]
 

src/librustc_mir/lib.rs

@@ -39,6 +39,7 @@ Rust MIR: a lowered representation of Rust. Also: an experiment!
 #![feature(nonzero)]
 #![feature(underscore_lifetimes)]
 #![cfg_attr(stage0, feature(never_type))]
+#![feature(inclusive_range_fields)]
 
 extern crate arena;
 #[macro_use]

src/librustc_trans/lib.rs

@@ -33,6 +33,7 @@
 #![feature(slice_patterns)]
 #![feature(conservative_impl_trait)]
 #![feature(optin_builtin_traits)]
+#![feature(inclusive_range_fields)]
 
 use rustc::dep_graph::WorkProduct;
 use syntax_pos::symbol::Symbol;