diff --git a/src/libcollections/binary_heap.rs b/src/libcollections/binary_heap.rs
index b9f5c6fcab909..fe9b60c393f09 100644
--- a/src/libcollections/binary_heap.rs
+++ b/src/libcollections/binary_heap.rs
@@ -223,19 +223,19 @@ pub struct BinaryHeap<T> {
 /// on `BinaryHeap`. See its documentation for details.
 ///
 /// [`peek_mut()`]: struct.BinaryHeap.html#method.peek_mut
-#[unstable(feature = "binary_heap_peek_mut", issue = "34392")]
+#[stable(feature = "binary_heap_peek_mut", since = "1.12.0")]
 pub struct PeekMut<'a, T: 'a + Ord> {
     heap: &'a mut BinaryHeap<T>
 }
 
-#[unstable(feature = "binary_heap_peek_mut", issue = "34392")]
+#[stable(feature = "binary_heap_peek_mut", since = "1.12.0")]
 impl<'a, T: Ord> Drop for PeekMut<'a, T> {
     fn drop(&mut self) {
         self.heap.sift_down(0);
     }
 }
 
-#[unstable(feature = "binary_heap_peek_mut", issue = "34392")]
+#[stable(feature = "binary_heap_peek_mut", since = "1.12.0")]
 impl<'a, T: Ord> Deref for PeekMut<'a, T> {
     type Target = T;
     fn deref(&self) -> &T {
@@ -243,7 +243,7 @@ impl<'a, T: Ord> Deref for PeekMut<'a, T> {
     }
 }
 
-#[unstable(feature = "binary_heap_peek_mut", issue = "34392")]
+#[stable(feature = "binary_heap_peek_mut", since = "1.12.0")]
 impl<'a, T: Ord> DerefMut for PeekMut<'a, T> {
     fn deref_mut(&mut self) -> &mut T {
         &mut self.heap.data[0]
@@ -366,7 +366,6 @@ impl<T: Ord> BinaryHeap<T> {
     /// Basic usage:
     ///
     /// ```
-    /// #![feature(binary_heap_peek_mut)]
     /// use std::collections::BinaryHeap;
     /// let mut heap = BinaryHeap::new();
     /// assert!(heap.peek_mut().is_none());
@@ -380,7 +379,7 @@ impl<T: Ord> BinaryHeap<T> {
     /// }
     /// assert_eq!(heap.peek(), Some(&2));
     /// ```
-    #[unstable(feature = "binary_heap_peek_mut", issue = "34392")]
+    #[stable(feature = "binary_heap_peek_mut", since = "1.12.0")]
     pub fn peek_mut(&mut self) -> Option<PeekMut<T>> {
         if self.is_empty() {
             None
diff --git a/src/libcollections/btree/map.rs b/src/libcollections/btree/map.rs
index c3a7d4023754a..a2e2ad37acb84 100644
--- a/src/libcollections/btree/map.rs
+++ b/src/libcollections/btree/map.rs
@@ -1981,8 +1981,6 @@ impl<'a, K: Ord, V> VacantEntry<'a, K, V> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(map_entry_recover_keys)]
-    ///
     /// use std::collections::BTreeMap;
     /// use std::collections::btree_map::Entry;
     ///
@@ -1992,7 +1990,7 @@ impl<'a, K: Ord, V> VacantEntry<'a, K, V> {
     ///     v.into_key();
     /// }
     /// ```
-    #[unstable(feature = "map_entry_recover_keys", issue = "34285")]
+    #[stable(feature = "map_entry_recover_keys2", since = "1.12.0")]
     pub fn into_key(self) -> K {
         self.key
     }
@@ -2074,13 +2072,18 @@ impl<'a, K: Ord, V> OccupiedEntry<'a, K, V> {
         self.handle.reborrow().into_kv().0
     }
 
+    /// Deprecated, renamed to `remove_entry`
+    #[unstable(feature = "map_entry_recover_keys", issue = "34285")]
+    #[rustc_deprecated(since = "1.12.0", reason = "renamed to `remove_entry`")]
+    pub fn remove_pair(self) -> (K, V) {
+        self.remove_entry()
+    }
+
     /// Take ownership of the key and value from the map.
     ///
     /// # Examples
     ///
     /// ```
-    /// #![feature(map_entry_recover_keys)]
-    ///
     /// use std::collections::BTreeMap;
     /// use std::collections::btree_map::Entry;
     ///
@@ -2089,14 +2092,14 @@ impl<'a, K: Ord, V> OccupiedEntry<'a, K, V> {
     ///
     /// if let Entry::Occupied(o) = map.entry("poneyland") {
     ///     // We delete the entry from the map.
-    ///     o.remove_pair();
+    ///     o.remove_entry();
     /// }
     ///
     /// // If now try to get the value, it will panic:
     /// // println!("{}", map["poneyland"]);
     /// ```
-    #[unstable(feature = "map_entry_recover_keys", issue = "34285")]
-    pub fn remove_pair(self) -> (K, V) {
+    #[stable(feature = "map_entry_recover_keys2", since = "1.12.0")]
+    pub fn remove_entry(self) -> (K, V) {
         self.remove_kv()
     }
 
diff --git a/src/libcollections/linked_list.rs b/src/libcollections/linked_list.rs
index 6842f02e0e19b..73aa67849fd2a 100644
--- a/src/libcollections/linked_list.rs
+++ b/src/libcollections/linked_list.rs
@@ -379,8 +379,6 @@ impl<T> LinkedList<T> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(linked_list_contains)]
-    ///
     /// use std::collections::LinkedList;
     ///
     /// let mut list: LinkedList<u32> = LinkedList::new();
@@ -392,8 +390,7 @@ impl<T> LinkedList<T> {
     /// assert_eq!(list.contains(&0), true);
     /// assert_eq!(list.contains(&10), false);
     /// ```
-    #[unstable(feature = "linked_list_contains", reason = "recently added",
-               issue = "32630")]
+    #[stable(feature = "linked_list_contains", since = "1.12.0")]
     pub fn contains(&self, x: &T) -> bool
         where T: PartialEq<T>
     {
diff --git a/src/libcollections/vec_deque.rs b/src/libcollections/vec_deque.rs
index 9c3792afa2f1c..aa42daec4c2d1 100644
--- a/src/libcollections/vec_deque.rs
+++ b/src/libcollections/vec_deque.rs
@@ -938,8 +938,6 @@ impl<T> VecDeque<T> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(vec_deque_contains)]
-    ///
     /// use std::collections::VecDeque;
     ///
     /// let mut vector: VecDeque<u32> = VecDeque::new();
@@ -950,8 +948,7 @@ impl<T> VecDeque<T> {
     /// assert_eq!(vector.contains(&1), true);
     /// assert_eq!(vector.contains(&10), false);
     /// ```
-    #[unstable(feature = "vec_deque_contains", reason = "recently added",
-               issue = "32630")]
+    #[stable(feature = "vec_deque_contains", since = "1.12.0")]
     pub fn contains(&self, x: &T) -> bool
         where T: PartialEq<T>
     {
diff --git a/src/libcollectionstest/lib.rs b/src/libcollectionstest/lib.rs
index ab3231b2b9955..f448fcf2dbf99 100644
--- a/src/libcollectionstest/lib.rs
+++ b/src/libcollectionstest/lib.rs
@@ -11,7 +11,6 @@
 #![deny(warnings)]
 
 #![feature(binary_heap_extras)]
-#![feature(binary_heap_peek_mut)]
 #![feature(box_syntax)]
 #![feature(btree_range)]
 #![feature(collections)]
@@ -19,7 +18,6 @@
 #![feature(const_fn)]
 #![feature(fn_traits)]
 #![feature(enumset)]
-#![feature(linked_list_contains)]
 #![feature(pattern)]
 #![feature(rand)]
 #![feature(step_by)]
@@ -27,7 +25,6 @@
 #![feature(test)]
 #![feature(unboxed_closures)]
 #![feature(unicode)]
-#![feature(vec_deque_contains)]
 #![feature(vec_into_iter_as_slice)]
 
 extern crate collections;
diff --git a/src/libcore/cell.rs b/src/libcore/cell.rs
index 17ec325e257b0..a388012e1daf2 100644
--- a/src/libcore/cell.rs
+++ b/src/libcore/cell.rs
@@ -233,10 +233,28 @@ impl<T:Copy> Cell<T> {
     /// ```
     #[inline]
     #[unstable(feature = "as_unsafe_cell", issue = "27708")]
+    #[rustc_deprecated(since = "1.12.0", reason = "renamed to as_ptr")]
     pub fn as_unsafe_cell(&self) -> &UnsafeCell<T> {
         &self.value
     }
 
+    /// Returns a raw pointer to the underlying data in this cell.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::cell::Cell;
+    ///
+    /// let c = Cell::new(5);
+    ///
+    /// let ptr = c.as_ptr();
+    /// ```
+    #[inline]
+    #[stable(feature = "cell_as_ptr", since = "1.12.0")]
+    pub fn as_ptr(&self) -> *mut T {
+        self.value.get()
+    }
+
     /// Returns a mutable reference to the underlying data.
     ///
     /// This call borrows `Cell` mutably (at compile-time) which guarantees
@@ -653,10 +671,28 @@ impl<T: ?Sized> RefCell<T> {
     /// ```
     #[inline]
     #[unstable(feature = "as_unsafe_cell", issue = "27708")]
+    #[rustc_deprecated(since = "1.12.0", reason = "renamed to as_ptr")]
     pub unsafe fn as_unsafe_cell(&self) -> &UnsafeCell<T> {
         &self.value
     }
 
+    /// Returns a raw pointer to the underlying data in this cell.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::cell::RefCell;
+    ///
+    /// let c = RefCell::new(5);
+    ///
+    /// let ptr = c.as_ptr();
+    /// ```
+    #[inline]
+    #[stable(feature = "cell_as_ptr", since = "1.12.0")]
+    pub fn as_ptr(&self) -> *mut T {
+        self.value.get()
+    }
+
     /// Returns a mutable reference to the underlying data.
     ///
     /// This call borrows `RefCell` mutably (at compile-time) so there is no
diff --git a/src/libcore/iter/traits.rs b/src/libcore/iter/traits.rs
index 4cbabe3f5edaf..cb509156e325e 100644
--- a/src/libcore/iter/traits.rs
+++ b/src/libcore/iter/traits.rs
@@ -563,10 +563,11 @@ impl<'a, I: ExactSizeIterator + ?Sized> ExactSizeIterator for &'a mut I {}
 /// implement the trait can be generated by the `sum` method. Like
 /// `FromIterator` this trait should rarely be called directly and instead
 /// interacted with through `Iterator::sum`.
-#[unstable(feature = "iter_arith_traits", issue = "34529")]
+#[stable(feature = "iter_arith_traits", since = "1.12.0")]
 pub trait Sum<A = Self>: Sized {
     /// Method which takes an iterator and generates `Self` from the elements by
     /// "summing up" the items.
+    #[stable(feature = "iter_arith_traits", since = "1.12.0")]
     fn sum<I: Iterator<Item=A>>(iter: I) -> Self;
 }
 
@@ -577,16 +578,17 @@ pub trait Sum<A = Self>: Sized {
 /// which implement the trait can be generated by the `product` method. Like
 /// `FromIterator` this trait should rarely be called directly and instead
 /// interacted with through `Iterator::product`.
-#[unstable(feature = "iter_arith_traits", issue = "34529")]
+#[stable(feature = "iter_arith_traits", since = "1.12.0")]
 pub trait Product<A = Self>: Sized {
     /// Method which takes an iterator and generates `Self` from the elements by
     /// multiplying the items.
+    #[stable(feature = "iter_arith_traits", since = "1.12.0")]
     fn product<I: Iterator<Item=A>>(iter: I) -> Self;
 }
 
 macro_rules! integer_sum_product {
     ($($a:ident)*) => ($(
-        #[unstable(feature = "iter_arith_traits", issue = "34529")]
+        #[stable(feature = "iter_arith_traits", since = "1.12.0")]
         impl Sum for $a {
             fn sum<I: Iterator<Item=$a>>(iter: I) -> $a {
                 iter.fold(0, |a, b| {
@@ -595,7 +597,7 @@ macro_rules! integer_sum_product {
             }
         }
 
-        #[unstable(feature = "iter_arith_traits", issue = "34529")]
+        #[stable(feature = "iter_arith_traits", since = "1.12.0")]
         impl Product for $a {
             fn product<I: Iterator<Item=$a>>(iter: I) -> $a {
                 iter.fold(1, |a, b| {
@@ -604,7 +606,7 @@ macro_rules! integer_sum_product {
             }
         }
 
-        #[unstable(feature = "iter_arith_traits", issue = "34529")]
+        #[stable(feature = "iter_arith_traits", since = "1.12.0")]
         impl<'a> Sum<&'a $a> for $a {
             fn sum<I: Iterator<Item=&'a $a>>(iter: I) -> $a {
                 iter.fold(0, |a, b| {
@@ -613,7 +615,7 @@ macro_rules! integer_sum_product {
             }
         }
 
-        #[unstable(feature = "iter_arith_traits", issue = "34529")]
+        #[stable(feature = "iter_arith_traits", since = "1.12.0")]
         impl<'a> Product<&'a $a> for $a {
             fn product<I: Iterator<Item=&'a $a>>(iter: I) -> $a {
                 iter.fold(1, |a, b| {
@@ -626,28 +628,28 @@ macro_rules! integer_sum_product {
 
 macro_rules! float_sum_product {
     ($($a:ident)*) => ($(
-        #[unstable(feature = "iter_arith_traits", issue = "34529")]
+        #[stable(feature = "iter_arith_traits", since = "1.12.0")]
         impl Sum for $a {
             fn sum<I: Iterator<Item=$a>>(iter: I) -> $a {
                 iter.fold(0.0, |a, b| a + b)
             }
         }
 
-        #[unstable(feature = "iter_arith_traits", issue = "34529")]
+        #[stable(feature = "iter_arith_traits", since = "1.12.0")]
         impl Product for $a {
             fn product<I: Iterator<Item=$a>>(iter: I) -> $a {
                 iter.fold(1.0, |a, b| a * b)
             }
         }
 
-        #[unstable(feature = "iter_arith_traits", issue = "34529")]
+        #[stable(feature = "iter_arith_traits", since = "1.12.0")]
         impl<'a> Sum<&'a $a> for $a {
             fn sum<I: Iterator<Item=&'a $a>>(iter: I) -> $a {
                 iter.fold(0.0, |a, b| a + *b)
             }
         }
 
-        #[unstable(feature = "iter_arith_traits", issue = "34529")]
+        #[stable(feature = "iter_arith_traits", since = "1.12.0")]
         impl<'a> Product<&'a $a> for $a {
             fn product<I: Iterator<Item=&'a $a>>(iter: I) -> $a {
                 iter.fold(1.0, |a, b| a * *b)
diff --git a/src/libcoretest/cell.rs b/src/libcoretest/cell.rs
index a635620d12abd..a7c230ba979be 100644
--- a/src/libcoretest/cell.rs
+++ b/src/libcoretest/cell.rs
@@ -176,21 +176,21 @@ fn ref_mut_map_accessor() {
 }
 
 #[test]
-fn as_unsafe_cell() {
+fn as_ptr() {
     let c1: Cell<usize> = Cell::new(0);
     c1.set(1);
-    assert_eq!(1, unsafe { *c1.as_unsafe_cell().get() });
+    assert_eq!(1, unsafe { *c1.as_ptr() });
 
     let c2: Cell<usize> = Cell::new(0);
-    unsafe { *c2.as_unsafe_cell().get() = 1; }
+    unsafe { *c2.as_ptr() = 1; }
     assert_eq!(1, c2.get());
 
     let r1: RefCell<usize> = RefCell::new(0);
     *r1.borrow_mut() = 1;
-    assert_eq!(1, unsafe { *r1.as_unsafe_cell().get() });
+    assert_eq!(1, unsafe { *r1.as_ptr() });
 
     let r2: RefCell<usize> = RefCell::new(0);
-    unsafe { *r2.as_unsafe_cell().get() = 1; }
+    unsafe { *r2.as_ptr() = 1; }
     assert_eq!(1, *r2.borrow());
 }
 
diff --git a/src/libcoretest/lib.rs b/src/libcoretest/lib.rs
index 9428b4096bfec..9116344c57938 100644
--- a/src/libcoretest/lib.rs
+++ b/src/libcoretest/lib.rs
@@ -10,7 +10,6 @@
 
 #![deny(warnings)]
 
-#![feature(as_unsafe_cell)]
 #![feature(borrow_state)]
 #![feature(box_syntax)]
 #![feature(cell_extras)]
diff --git a/src/libstd/collections/hash/map.rs b/src/libstd/collections/hash/map.rs
index 8039421ae7730..94710a9190f03 100644
--- a/src/libstd/collections/hash/map.rs
+++ b/src/libstd/collections/hash/map.rs
@@ -1640,13 +1640,18 @@ impl<'a, K, V> OccupiedEntry<'a, K, V> {
         self.elem.read().0
     }
 
+    /// Deprecated, renamed to `remove_entry`
+    #[unstable(feature = "map_entry_recover_keys", issue = "34285")]
+    #[rustc_deprecated(since = "1.12.0", reason = "renamed to `remove_entry`")]
+    pub fn remove_pair(self) -> (K, V) {
+        self.remove_entry()
+    }
+
     /// Take the ownership of the key and value from the map.
     ///
     /// # Examples
     ///
     /// ```
-    /// #![feature(map_entry_recover_keys)]
-    ///
     /// use std::collections::HashMap;
     /// use std::collections::hash_map::Entry;
     ///
@@ -1655,13 +1660,13 @@ impl<'a, K, V> OccupiedEntry<'a, K, V> {
     ///
     /// if let Entry::Occupied(o) = map.entry("poneyland") {
     ///     // We delete the entry from the map.
-    ///     o.remove_pair();
+    ///     o.remove_entry();
     /// }
     ///
     /// assert_eq!(map.contains_key("poneyland"), false);
     /// ```
-    #[unstable(feature = "map_entry_recover_keys", issue = "34285")]
-    pub fn remove_pair(self) -> (K, V) {
+    #[stable(feature = "map_entry_recover_keys2", since = "1.12.0")]
+    pub fn remove_entry(self) -> (K, V) {
         pop_internal(self.elem)
     }
 
@@ -1808,8 +1813,6 @@ impl<'a, K: 'a, V: 'a> VacantEntry<'a, K, V> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(map_entry_recover_keys)]
-    ///
     /// use std::collections::HashMap;
     /// use std::collections::hash_map::Entry;
     ///
@@ -1819,7 +1822,7 @@ impl<'a, K: 'a, V: 'a> VacantEntry<'a, K, V> {
     ///     v.into_key();
     /// }
     /// ```
-    #[unstable(feature = "map_entry_recover_keys", issue = "34285")]
+    #[stable(feature = "map_entry_recover_keys2", since = "1.12.0")]
     pub fn into_key(self) -> K {
         self.key
     }
diff --git a/src/libstd/net/ip.rs b/src/libstd/net/ip.rs
index 2a8bd0c88beb6..4c3b993497cf5 100644
--- a/src/libstd/net/ip.rs
+++ b/src/libstd/net/ip.rs
@@ -63,8 +63,7 @@ impl IpAddr {
     /// Returns true for the special 'unspecified' address ([IPv4], [IPv6]).
     /// [IPv4]: ../../std/net/struct.Ipv4Addr.html#method.is_unspecified
     /// [IPv6]: ../../std/net/struct.Ipv6Addr.html#method.is_unspecified
-    #[unstable(feature="ip", issue="27709",
-               reason="recently added and depends on unstable Ipv4Addr.is_unspecified()")]
+    #[stable(feature = "ip_shared", since = "1.12.0")]
     pub fn is_unspecified(&self) -> bool {
         match *self {
             IpAddr::V4(ref a) => a.is_unspecified(),
@@ -75,7 +74,7 @@ impl IpAddr {
     /// Returns true if this is a loopback address ([IPv4], [IPv6]).
     /// [IPv4]: ../../std/net/struct.Ipv4Addr.html#method.is_loopback
     /// [IPv6]: ../../std/net/struct.Ipv6Addr.html#method.is_loopback
-    #[unstable(feature="ip", reason="recently added", issue="27709")]
+    #[stable(feature = "ip_shared", since = "1.12.0")]
     pub fn is_loopback(&self) -> bool {
         match *self {
             IpAddr::V4(ref a) => a.is_loopback(),
@@ -86,8 +85,6 @@ impl IpAddr {
     /// Returns true if the address appears to be globally routable ([IPv4], [IPv6]).
     /// [IPv4]: ../../std/net/struct.Ipv4Addr.html#method.is_global
     /// [IPv6]: ../../std/net/struct.Ipv6Addr.html#method.is_global
-    #[unstable(feature="ip", issue="27709",
-               reason="recently added and depends on unstable Ip{v4,v6}Addr.is_global()")]
     pub fn is_global(&self) -> bool {
         match *self {
             IpAddr::V4(ref a) => a.is_global(),
@@ -98,7 +95,7 @@ impl IpAddr {
     /// Returns true if this is a multicast address ([IPv4], [IPv6]).
     /// [IPv4]: ../../std/net/struct.Ipv4Addr.html#method.is_multicast
     /// [IPv6]: ../../std/net/struct.Ipv6Addr.html#method.is_multicast
-    #[unstable(feature="ip", reason="recently added", issue="27709")]
+    #[stable(feature = "ip_shared", since = "1.12.0")]
     pub fn is_multicast(&self) -> bool {
         match *self {
             IpAddr::V4(ref a) => a.is_multicast(),
@@ -109,8 +106,6 @@ impl IpAddr {
     /// Returns true if this address is in a range designated for documentation ([IPv4], [IPv6]).
     /// [IPv4]: ../../std/net/struct.Ipv4Addr.html#method.is_documentation
     /// [IPv6]: ../../std/net/struct.Ipv6Addr.html#method.is_documentation
-    #[unstable(feature="ip", issue="27709",
-               reason="recently added and depends on unstable Ipv6Addr.is_documentation()")]
     pub fn is_documentation(&self) -> bool {
         match *self {
             IpAddr::V4(ref a) => a.is_documentation(),
@@ -147,6 +142,7 @@ impl Ipv4Addr {
     /// This property is defined in _UNIX Network Programming, Second Edition_,
     /// W. Richard Stevens, p. 891; see also [ip7]
     /// [ip7][http://man7.org/linux/man-pages/man7/ip.7.html]
+    #[stable(feature = "ip_shared", since = "1.12.0")]
     pub fn is_unspecified(&self) -> bool {
         self.inner.s_addr == 0
     }
@@ -515,8 +511,7 @@ impl Ipv6Addr {
     }
 
     /// Returns the sixteen eight-bit integers the IPv6 address consists of.
-    #[unstable(feature = "ipv6_to_octets", reason = "needs some testing",
-               issue = "32313")]
+    #[stable(feature = "ipv6_to_octets", since = "1.12.0")]
     pub fn octets(&self) -> [u8; 16] {
         self.inner.s6_addr
     }
diff --git a/src/libstd/sync/mpsc/mod.rs b/src/libstd/sync/mpsc/mod.rs
index 11f785dffd16a..d8b8c6a77a266 100644
--- a/src/libstd/sync/mpsc/mod.rs
+++ b/src/libstd/sync/mpsc/mod.rs
@@ -394,13 +394,15 @@ pub enum TryRecvError {
 /// This enumeration is the list of possible errors that `recv_timeout` could
 /// not return data when called.
 #[derive(PartialEq, Eq, Clone, Copy, Debug)]
-#[unstable(feature = "mpsc_recv_timeout", issue = "34029")]
+#[stable(feature = "mpsc_recv_timeout", since = "1.12.0")]
 pub enum RecvTimeoutError {
     /// This channel is currently empty, but the sender(s) have not yet
     /// disconnected, so data may yet become available.
+    #[stable(feature = "mpsc_recv_timeout", since = "1.12.0")]
     Timeout,
     /// This channel's sending half has become disconnected, and there will
     /// never be any more data received on this channel
+    #[stable(feature = "mpsc_recv_timeout", since = "1.12.0")]
     Disconnected,
 }
 
@@ -912,8 +914,6 @@ impl<T> Receiver<T> {
     /// # Examples
     ///
     /// ```no_run
-    /// #![feature(mpsc_recv_timeout)]
-    ///
     /// use std::sync::mpsc::{self, RecvTimeoutError};
     /// use std::time::Duration;
     ///
@@ -922,7 +922,7 @@ impl<T> Receiver<T> {
     /// let timeout = Duration::from_millis(100);
     /// assert_eq!(Err(RecvTimeoutError::Timeout), recv.recv_timeout(timeout));
     /// ```
-    #[unstable(feature = "mpsc_recv_timeout", issue = "34029")]
+    #[stable(feature = "mpsc_recv_timeout", since = "1.12.0")]
     pub fn recv_timeout(&self, timeout: Duration) -> Result<T, RecvTimeoutError> {
         // Do an optimistic try_recv to avoid the performance impact of
         // Instant::now() in the full-channel case.
diff --git a/src/libstd/sys/unix/ext/process.rs b/src/libstd/sys/unix/ext/process.rs
index 430ec5f94a6f8..dd70ba2e490ad 100644
--- a/src/libstd/sys/unix/ext/process.rs
+++ b/src/libstd/sys/unix/ext/process.rs
@@ -114,7 +114,7 @@ impl CommandExt for process::Command {
 pub trait ExitStatusExt {
     /// Creates a new `ExitStatus` from the raw underlying `i32` return value of
     /// a process.
-    #[unstable(feature = "exit_status_from", issue = "32713")]
+    #[stable(feature = "exit_status_from", since = "1.12.0")]
     fn from_raw(raw: i32) -> Self;
 
     /// If the process was terminated by a signal, returns that signal.
diff --git a/src/libstd/sys/windows/ext/process.rs b/src/libstd/sys/windows/ext/process.rs
index 56c6a73d4f82b..98166bf8cda09 100644
--- a/src/libstd/sys/windows/ext/process.rs
+++ b/src/libstd/sys/windows/ext/process.rs
@@ -83,10 +83,11 @@ impl IntoRawHandle for process::ChildStderr {
 }
 
 /// Windows-specific extensions to `std::process::ExitStatus`
-#[unstable(feature = "exit_status_from", issue = "32713")]
+#[stable(feature = "exit_status_from", since = "1.12.0")]
 pub trait ExitStatusExt {
     /// Creates a new `ExitStatus` from the raw underlying `u32` return value of
     /// a process.
+    #[stable(feature = "exit_status_from", since = "1.12.0")]
     fn from_raw(raw: u32) -> Self;
 }
 
diff --git a/src/libtest/lib.rs b/src/libtest/lib.rs
index 850127d9f2950..2b4193306ddf5 100644
--- a/src/libtest/lib.rs
+++ b/src/libtest/lib.rs
@@ -42,7 +42,6 @@
 #![feature(staged_api)]
 #![feature(question_mark)]
 #![feature(panic_unwind)]
-#![feature(mpsc_recv_timeout)]
 
 extern crate getopts;
 extern crate term;