From bc651cac8d671aee9be876b71d0fa86f94f56b0f Mon Sep 17 00:00:00 2001
From: Ulrik Sverdrup <bluss@users.noreply.github.com>
Date: Mon, 15 Jan 2018 19:59:10 +0100
Subject: core: Stabilize FusedIterator

FusedIterator is a marker trait that promises that the implementing
iterator continues to return `None` from `.next()` once it has returned
`None` once (and/or `.next_back()`, if implemented).

The effects of FusedIterator are already widely available through
`.fuse()`, but with stable `FusedIterator`, stable Rust users can
implement this trait for their iterators when appropriate.
---
 src/libcore/char.rs         |  8 ++++----
 src/libcore/iter/mod.rs     | 42 +++++++++++++++++++++---------------------
 src/libcore/iter/range.rs   |  6 +++---
 src/libcore/iter/sources.rs |  6 +++---
 src/libcore/iter/traits.rs  |  4 ++--
 src/libcore/option.rs       |  6 +++---
 src/libcore/result.rs       |  6 +++---
 src/libcore/slice/mod.rs    | 24 ++++++++++++------------
 src/libcore/str/mod.rs      | 14 +++++++-------
 9 files changed, 58 insertions(+), 58 deletions(-)

(limited to 'src/libcore')

diff --git a/src/libcore/char.rs b/src/libcore/char.rs
index 7215bd2a476..3ff31a7a928 100644
--- a/src/libcore/char.rs
+++ b/src/libcore/char.rs
@@ -643,7 +643,7 @@ impl ExactSizeIterator for EscapeUnicode {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl FusedIterator for EscapeUnicode {}
 
 #[stable(feature = "char_struct_display", since = "1.16.0")]
@@ -756,7 +756,7 @@ impl ExactSizeIterator for EscapeDefault {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl FusedIterator for EscapeDefault {}
 
 #[stable(feature = "char_struct_display", since = "1.16.0")]
@@ -790,7 +790,7 @@ impl Iterator for EscapeDebug {
 #[stable(feature = "char_escape_debug", since = "1.20.0")]
 impl ExactSizeIterator for EscapeDebug { }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl FusedIterator for EscapeDebug {}
 
 #[stable(feature = "char_escape_debug", since = "1.20.0")]
@@ -904,5 +904,5 @@ impl<I: Iterator<Item = u8>> Iterator for DecodeUtf8<I> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<I: FusedIterator<Item = u8>> FusedIterator for DecodeUtf8<I> {}
diff --git a/src/libcore/iter/mod.rs b/src/libcore/iter/mod.rs
index 257d7d6caaa..9a8f7fc4e6a 100644
--- a/src/libcore/iter/mod.rs
+++ b/src/libcore/iter/mod.rs
@@ -344,7 +344,7 @@ pub use self::sources::{Once, once};
 pub use self::traits::{FromIterator, IntoIterator, DoubleEndedIterator, Extend};
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use self::traits::{ExactSizeIterator, Sum, Product};
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 pub use self::traits::FusedIterator;
 #[unstable(feature = "trusted_len", issue = "37572")]
 pub use self::traits::TrustedLen;
@@ -506,7 +506,7 @@ impl<I> ExactSizeIterator for Rev<I>
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<I> FusedIterator for Rev<I>
     where I: FusedIterator + DoubleEndedIterator {}
 
@@ -589,7 +589,7 @@ impl<'a, I, T: 'a> ExactSizeIterator for Cloned<I>
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, I, T: 'a> FusedIterator for Cloned<I>
     where I: FusedIterator<Item=&'a T>, T: Clone
 {}
@@ -662,7 +662,7 @@ impl<I> Iterator for Cycle<I> where I: Clone + Iterator {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<I> FusedIterator for Cycle<I> where I: Clone + Iterator {}
 
 /// An iterator for stepping iterators by a custom amount.
@@ -1002,7 +1002,7 @@ impl<A, B> DoubleEndedIterator for Chain<A, B> where
 }
 
 // Note: *both* must be fused to handle double-ended iterators.
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<A, B> FusedIterator for Chain<A, B>
     where A: FusedIterator,
           B: FusedIterator<Item=A::Item>,
@@ -1262,7 +1262,7 @@ unsafe impl<A, B> TrustedRandomAccess for Zip<A, B>
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<A, B> FusedIterator for Zip<A, B>
     where A: FusedIterator, B: FusedIterator, {}
 
@@ -1404,7 +1404,7 @@ impl<B, I: ExactSizeIterator, F> ExactSizeIterator for Map<I, F>
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<B, I: FusedIterator, F> FusedIterator for Map<I, F>
     where F: FnMut(I::Item) -> B {}
 
@@ -1553,7 +1553,7 @@ impl<I: DoubleEndedIterator, P> DoubleEndedIterator for Filter<I, P>
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<I: FusedIterator, P> FusedIterator for Filter<I, P>
     where P: FnMut(&I::Item) -> bool {}
 
@@ -1663,7 +1663,7 @@ impl<B, I: DoubleEndedIterator, F> DoubleEndedIterator for FilterMap<I, F>
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<B, I: FusedIterator, F> FusedIterator for FilterMap<I, F>
     where F: FnMut(I::Item) -> Option<B> {}
 
@@ -1818,7 +1818,7 @@ unsafe impl<I> TrustedRandomAccess for Enumerate<I>
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<I> FusedIterator for Enumerate<I> where I: FusedIterator {}
 
 #[unstable(feature = "trusted_len", issue = "37572")]
@@ -1938,7 +1938,7 @@ impl<I: Iterator> Iterator for Peekable<I> {
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<I: ExactSizeIterator> ExactSizeIterator for Peekable<I> {}
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<I: FusedIterator> FusedIterator for Peekable<I> {}
 
 impl<I: Iterator> Peekable<I> {
@@ -2072,7 +2072,7 @@ impl<I: Iterator, P> Iterator for SkipWhile<I, P>
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<I, P> FusedIterator for SkipWhile<I, P>
     where I: FusedIterator, P: FnMut(&I::Item) -> bool {}
 
@@ -2151,7 +2151,7 @@ impl<I: Iterator, P> Iterator for TakeWhile<I, P>
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<I, P> FusedIterator for TakeWhile<I, P>
     where I: FusedIterator, P: FnMut(&I::Item) -> bool {}
 
@@ -2290,7 +2290,7 @@ impl<I> DoubleEndedIterator for Skip<I> where I: DoubleEndedIterator + ExactSize
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<I> FusedIterator for Skip<I> where I: FusedIterator {}
 
 /// An iterator that only iterates over the first `n` iterations of `iter`.
@@ -2371,7 +2371,7 @@ impl<I> Iterator for Take<I> where I: Iterator{
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<I> ExactSizeIterator for Take<I> where I: ExactSizeIterator {}
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<I> FusedIterator for Take<I> where I: FusedIterator {}
 
 #[unstable(feature = "trusted_len", issue = "37572")]
@@ -2517,7 +2517,7 @@ impl<I: DoubleEndedIterator, U, F> DoubleEndedIterator for FlatMap<I, U, F>
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<I, U, F> FusedIterator for FlatMap<I, U, F>
     where I: FusedIterator, U: IntoIterator, F: FnMut(I::Item) -> U {}
 
@@ -2605,7 +2605,7 @@ impl<I, U> DoubleEndedIterator for Flatten<I>
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<I, U> FusedIterator for Flatten<I>
     where I: FusedIterator, U: Iterator,
           I::Item: IntoIterator<IntoIter = U, Item = U::Item> {}
@@ -2765,7 +2765,7 @@ pub struct Fuse<I> {
     done: bool
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<I> FusedIterator for Fuse<I> where I: Iterator {}
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -2896,7 +2896,7 @@ unsafe impl<I> TrustedRandomAccess for Fuse<I>
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<I> Iterator for Fuse<I> where I: FusedIterator {
     #[inline]
     fn next(&mut self) -> Option<<I as Iterator>::Item> {
@@ -2938,7 +2938,7 @@ impl<I> Iterator for Fuse<I> where I: FusedIterator {
     }
 }
 
-#[unstable(feature = "fused", reason = "recently added", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<I> DoubleEndedIterator for Fuse<I>
     where I: DoubleEndedIterator + FusedIterator
 {
@@ -3082,6 +3082,6 @@ impl<I: ExactSizeIterator, F> ExactSizeIterator for Inspect<I, F>
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<I: FusedIterator, F> FusedIterator for Inspect<I, F>
     where F: FnMut(&I::Item) {}
diff --git a/src/libcore/iter/range.rs b/src/libcore/iter/range.rs
index 65b38c94dda..7f3b227e8b7 100644
--- a/src/libcore/iter/range.rs
+++ b/src/libcore/iter/range.rs
@@ -295,7 +295,7 @@ impl<A: Step> DoubleEndedIterator for ops::Range<A> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<A: Step> FusedIterator for ops::Range<A> {}
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -322,7 +322,7 @@ impl<A: Step> Iterator for ops::RangeFrom<A> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<A: Step> FusedIterator for ops::RangeFrom<A> {}
 
 #[unstable(feature = "trusted_len", issue = "37572")]
@@ -463,5 +463,5 @@ impl<A: Step> DoubleEndedIterator for ops::RangeInclusive<A> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<A: Step> FusedIterator for ops::RangeInclusive<A> {}
diff --git a/src/libcore/iter/sources.rs b/src/libcore/iter/sources.rs
index dfd42f3e733..149dff83bc0 100644
--- a/src/libcore/iter/sources.rs
+++ b/src/libcore/iter/sources.rs
@@ -41,7 +41,7 @@ impl<A: Clone> DoubleEndedIterator for Repeat<A> {
     fn next_back(&mut self) -> Option<A> { Some(self.element.clone()) }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<A: Clone> FusedIterator for Repeat<A> {}
 
 #[unstable(feature = "trusted_len", issue = "37572")]
@@ -259,7 +259,7 @@ impl<T> ExactSizeIterator for Empty<T> {
 #[unstable(feature = "trusted_len", issue = "37572")]
 unsafe impl<T> TrustedLen for Empty<T> {}
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<T> FusedIterator for Empty<T> {}
 
 // not #[derive] because that adds a Clone bound on T,
@@ -340,7 +340,7 @@ impl<T> ExactSizeIterator for Once<T> {
 #[unstable(feature = "trusted_len", issue = "37572")]
 unsafe impl<T> TrustedLen for Once<T> {}
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<T> FusedIterator for Once<T> {}
 
 /// Creates an iterator that yields an element exactly once.
diff --git a/src/libcore/iter/traits.rs b/src/libcore/iter/traits.rs
index 860742d9eab..a86f4e74706 100644
--- a/src/libcore/iter/traits.rs
+++ b/src/libcore/iter/traits.rs
@@ -959,10 +959,10 @@ impl<T, U, E> Product<Result<U, E>> for Result<T, E>
 /// [`None`]: ../../std/option/enum.Option.html#variant.None
 /// [`Iterator::fuse`]: ../../std/iter/trait.Iterator.html#method.fuse
 /// [`Fuse`]: ../../std/iter/struct.Fuse.html
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 pub trait FusedIterator: Iterator {}
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, I: FusedIterator + ?Sized> FusedIterator for &'a mut I {}
 
 /// An iterator that reports an accurate length using size_hint.
diff --git a/src/libcore/option.rs b/src/libcore/option.rs
index b8fe28d0f0d..99c1d7d9b36 100644
--- a/src/libcore/option.rs
+++ b/src/libcore/option.rs
@@ -1051,7 +1051,7 @@ impl<'a, A> DoubleEndedIterator for Iter<'a, A> {
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<'a, A> ExactSizeIterator for Iter<'a, A> {}
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, A> FusedIterator for Iter<'a, A> {}
 
 #[unstable(feature = "trusted_len", issue = "37572")]
@@ -1096,7 +1096,7 @@ impl<'a, A> DoubleEndedIterator for IterMut<'a, A> {
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<'a, A> ExactSizeIterator for IterMut<'a, A> {}
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, A> FusedIterator for IterMut<'a, A> {}
 #[unstable(feature = "trusted_len", issue = "37572")]
 unsafe impl<'a, A> TrustedLen for IterMut<'a, A> {}
@@ -1133,7 +1133,7 @@ impl<A> DoubleEndedIterator for IntoIter<A> {
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<A> ExactSizeIterator for IntoIter<A> {}
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<A> FusedIterator for IntoIter<A> {}
 
 #[unstable(feature = "trusted_len", issue = "37572")]
diff --git a/src/libcore/result.rs b/src/libcore/result.rs
index 3801db94e15..5131fc837ef 100644
--- a/src/libcore/result.rs
+++ b/src/libcore/result.rs
@@ -1038,7 +1038,7 @@ impl<'a, T> DoubleEndedIterator for Iter<'a, T> {
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<'a, T> ExactSizeIterator for Iter<'a, T> {}
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, T> FusedIterator for Iter<'a, T> {}
 
 #[unstable(feature = "trusted_len", issue = "37572")]
@@ -1082,7 +1082,7 @@ impl<'a, T> DoubleEndedIterator for IterMut<'a, T> {
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<'a, T> ExactSizeIterator for IterMut<'a, T> {}
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, T> FusedIterator for IterMut<'a, T> {}
 
 #[unstable(feature = "trusted_len", issue = "37572")]
@@ -1125,7 +1125,7 @@ impl<T> DoubleEndedIterator for IntoIter<T> {
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<T> ExactSizeIterator for IntoIter<T> {}
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<T> FusedIterator for IntoIter<T> {}
 
 #[unstable(feature = "trusted_len", issue = "37572")]
diff --git a/src/libcore/slice/mod.rs b/src/libcore/slice/mod.rs
index a43ed65907f..02207f1738f 100644
--- a/src/libcore/slice/mod.rs
+++ b/src/libcore/slice/mod.rs
@@ -1461,7 +1461,7 @@ impl<'a, T> ExactSizeIterator for Iter<'a, T> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, T> FusedIterator for Iter<'a, T> {}
 
 #[unstable(feature = "trusted_len", issue = "37572")]
@@ -1589,7 +1589,7 @@ impl<'a, T> ExactSizeIterator for IterMut<'a, T> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, T> FusedIterator for IterMut<'a, T> {}
 
 #[unstable(feature = "trusted_len", issue = "37572")]
@@ -1737,7 +1737,7 @@ impl<'a, T, P> SplitIter for Split<'a, T, P> where P: FnMut(&T) -> bool {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, T, P> FusedIterator for Split<'a, T, P> where P: FnMut(&T) -> bool {}
 
 /// An iterator over the subslices of the vector which are separated
@@ -1835,7 +1835,7 @@ impl<'a, T, P> DoubleEndedIterator for SplitMut<'a, T, P> where
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, T, P> FusedIterator for SplitMut<'a, T, P> where P: FnMut(&T) -> bool {}
 
 /// An iterator over subslices separated by elements that match a predicate
@@ -1892,7 +1892,7 @@ impl<'a, T, P> SplitIter for RSplit<'a, T, P> where P: FnMut(&T) -> bool {
     }
 }
 
-//#[unstable(feature = "fused", issue = "35602")]
+//#[stable(feature = "fused", since = "1.25.0")]
 #[unstable(feature = "slice_rsplit", issue = "41020")]
 impl<'a, T, P> FusedIterator for RSplit<'a, T, P> where P: FnMut(&T) -> bool {}
 
@@ -1951,7 +1951,7 @@ impl<'a, T, P> DoubleEndedIterator for RSplitMut<'a, T, P> where
     }
 }
 
-//#[unstable(feature = "fused", issue = "35602")]
+//#[stable(feature = "fused", since = "1.25.0")]
 #[unstable(feature = "slice_rsplit", issue = "41020")]
 impl<'a, T, P> FusedIterator for RSplitMut<'a, T, P> where P: FnMut(&T) -> bool {}
 
@@ -2088,7 +2088,7 @@ macro_rules! forward_iterator {
             }
         }
 
-        #[unstable(feature = "fused", issue = "35602")]
+        #[stable(feature = "fused", since = "1.25.0")]
         impl<'a, $elem, P> FusedIterator for $name<'a, $elem, P>
             where P: FnMut(&T) -> bool {}
     }
@@ -2194,7 +2194,7 @@ impl<'a, T> DoubleEndedIterator for Windows<'a, T> {
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<'a, T> ExactSizeIterator for Windows<'a, T> {}
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, T> FusedIterator for Windows<'a, T> {}
 
 #[doc(hidden)]
@@ -2313,7 +2313,7 @@ impl<'a, T> DoubleEndedIterator for Chunks<'a, T> {
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<'a, T> ExactSizeIterator for Chunks<'a, T> {}
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, T> FusedIterator for Chunks<'a, T> {}
 
 #[doc(hidden)]
@@ -2429,7 +2429,7 @@ impl<'a, T> DoubleEndedIterator for ChunksMut<'a, T> {
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<'a, T> ExactSizeIterator for ChunksMut<'a, T> {}
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, T> FusedIterator for ChunksMut<'a, T> {}
 
 #[doc(hidden)]
@@ -2539,7 +2539,7 @@ impl<'a, T> ExactSizeIterator for ExactChunks<'a, T> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, T> FusedIterator for ExactChunks<'a, T> {}
 
 #[doc(hidden)]
@@ -2636,7 +2636,7 @@ impl<'a, T> ExactSizeIterator for ExactChunksMut<'a, T> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, T> FusedIterator for ExactChunksMut<'a, T> {}
 
 #[doc(hidden)]
diff --git a/src/libcore/str/mod.rs b/src/libcore/str/mod.rs
index 765b369e4b2..7e919b653f2 100644
--- a/src/libcore/str/mod.rs
+++ b/src/libcore/str/mod.rs
@@ -609,7 +609,7 @@ impl<'a> DoubleEndedIterator for Chars<'a> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a> FusedIterator for Chars<'a> {}
 
 impl<'a> Chars<'a> {
@@ -702,7 +702,7 @@ impl<'a> DoubleEndedIterator for CharIndices<'a> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a> FusedIterator for CharIndices<'a> {}
 
 impl<'a> CharIndices<'a> {
@@ -817,7 +817,7 @@ impl<'a> ExactSizeIterator for Bytes<'a> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a> FusedIterator for Bytes<'a> {}
 
 #[unstable(feature = "trusted_len", issue = "37572")]
@@ -977,10 +977,10 @@ macro_rules! generate_pattern_iterators {
             }
         }
 
-        #[unstable(feature = "fused", issue = "35602")]
+        #[stable(feature = "fused", since = "1.25.0")]
         impl<'a, P: Pattern<'a>> FusedIterator for $forward_iterator<'a, P> {}
 
-        #[unstable(feature = "fused", issue = "35602")]
+        #[stable(feature = "fused", since = "1.25.0")]
         impl<'a, P: Pattern<'a>> FusedIterator for $reverse_iterator<'a, P>
             where P::Searcher: ReverseSearcher<'a> {}
 
@@ -1337,7 +1337,7 @@ impl<'a> DoubleEndedIterator for Lines<'a> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a> FusedIterator for Lines<'a> {}
 
 /// Created with the method [`lines_any`].
@@ -1403,7 +1403,7 @@ impl<'a> DoubleEndedIterator for LinesAny<'a> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 #[allow(deprecated)]
 impl<'a> FusedIterator for LinesAny<'a> {}
 
-- 
cgit 1.4.1-3-g733a5