Add 'feature' and 'since' to stability attributes

5 files changed, 85 insertions, 73 deletions

diff --git a/src/liballoc/arc.rs b/src/liballoc/arc.rs
index c0cd034abfa..34322f7950c 100644
--- a/src/liballoc/arc.rs
+++ b/src/liballoc/arc.rs
@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![stable]
+#![stable(feature = "grandfathered", since = "1.0.0")]
 
 //! Threadsafe reference-counted boxes (the `Arc<T>` type).
 //!
@@ -110,7 +110,7 @@ use heap::deallocate;
 /// }
 /// ```
 #[unsafe_no_drop_flag]
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 pub struct Arc<T> {
     // FIXME #12808: strange name to try to avoid interfering with
     // field accesses of the contained type via Deref
@@ -126,7 +126,8 @@ unsafe impl<T: Sync + Send> Sync for Arc<T> { }
 /// Weak pointers will not keep the data inside of the `Arc` alive, and can be used to break cycles
 /// between `Arc` pointers.
 #[unsafe_no_drop_flag]
-#[unstable = "Weak pointers may not belong in this module."]
+#[unstable(feature = "unnamed_feature", since = "1.0.0",
+           reason = "Weak pointers may not belong in this module.")]
 pub struct Weak<T> {
     // FIXME #12808: strange name to try to avoid interfering with
     // field accesses of the contained type via Deref
@@ -156,7 +157,7 @@ impl<T> Arc<T> {
     /// let five = Arc::new(5i);
     /// ```
     #[inline]
-    #[stable]
+    #[stable(feature = "grandfathered", since = "1.0.0")]
     pub fn new(data: T) -> Arc<T> {
         // Start the weak pointer count as 1 which is the weak pointer that's
         // held by all the strong pointers (kinda), see std/rc.rs for more info
@@ -179,7 +180,8 @@ impl<T> Arc<T> {
     ///
     /// let weak_five = five.downgrade();
     /// ```
-    #[unstable = "Weak pointers may not belong in this module."]
+    #[unstable(feature = "unnamed_feature", since = "1.0.0",
+               reason = "Weak pointers may not belong in this module.")]
     pub fn downgrade(&self) -> Weak<T> {
         // See the clone() impl for why this is relaxed
         self.inner().weak.fetch_add(1, Relaxed);
@@ -200,15 +202,15 @@ impl<T> Arc<T> {
 
 /// Get the number of weak references to this value.
 #[inline]
-#[unstable]
+#[unstable(feature = "unnamed_feature", since = "1.0.0")]
 pub fn weak_count<T>(this: &Arc<T>) -> uint { this.inner().weak.load(SeqCst) - 1 }
 
 /// Get the number of strong references to this value.
 #[inline]
-#[unstable]
+#[unstable(feature = "unnamed_feature", since = "1.0.0")]
 pub fn strong_count<T>(this: &Arc<T>) -> uint { this.inner().strong.load(SeqCst) }
 
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T> Clone for Arc<T> {
     /// Makes a clone of the `Arc<T>`.
     ///
@@ -245,7 +247,7 @@ impl<T> BorrowFrom<Arc<T>> for T {
     }
 }
 
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T> Deref for Arc<T> {
     type Target = T;
 
@@ -271,7 +273,7 @@ impl<T: Send + Sync + Clone> Arc<T> {
     /// let mut_five = five.make_unique();
     /// ```
     #[inline]
-    #[unstable]
+    #[unstable(feature = "unnamed_feature", since = "1.0.0")]
     pub fn make_unique(&mut self) -> &mut T {
         // Note that we hold a strong reference, which also counts as a weak reference, so we only
         // clone if there is an additional reference of either kind.
@@ -289,7 +291,7 @@ impl<T: Send + Sync + Clone> Arc<T> {
 }
 
 #[unsafe_destructor]
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T: Sync + Send> Drop for Arc<T> {
     /// Drops the `Arc<T>`.
     ///
@@ -355,7 +357,8 @@ impl<T: Sync + Send> Drop for Arc<T> {
     }
 }
 
-#[unstable = "Weak pointers may not belong in this module."]
+#[unstable(feature = "unnamed_feature", since = "1.0.0",
+           reason = "Weak pointers may not belong in this module.")]
 impl<T: Sync + Send> Weak<T> {
     /// Upgrades a weak reference to a strong reference.
     ///
@@ -393,7 +396,8 @@ impl<T: Sync + Send> Weak<T> {
     }
 }
 
-#[unstable = "Weak pointers may not belong in this module."]
+#[unstable(feature = "unnamed_feature", since = "1.0.0",
+           reason = "Weak pointers may not belong in this module.")]
 impl<T: Sync + Send> Clone for Weak<T> {
     /// Makes a clone of the `Weak<T>`.
     ///
@@ -417,7 +421,7 @@ impl<T: Sync + Send> Clone for Weak<T> {
 }
 
 #[unsafe_destructor]
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T: Sync + Send> Drop for Weak<T> {
     /// Drops the `Weak<T>`.
     ///
@@ -460,7 +464,7 @@ impl<T: Sync + Send> Drop for Weak<T> {
     }
 }
 
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T: PartialEq> PartialEq for Arc<T> {
     /// Equality for two `Arc<T>`s.
     ///
@@ -492,7 +496,7 @@ impl<T: PartialEq> PartialEq for Arc<T> {
     /// ```
     fn ne(&self, other: &Arc<T>) -> bool { *(*self) != *(*other) }
 }
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T: PartialOrd> PartialOrd for Arc<T> {
     /// Partial comparison for two `Arc<T>`s.
     ///
@@ -571,11 +575,11 @@ impl<T: PartialOrd> PartialOrd for Arc<T> {
     /// ```
     fn ge(&self, other: &Arc<T>) -> bool { *(*self) >= *(*other) }
 }
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T: Ord> Ord for Arc<T> {
     fn cmp(&self, other: &Arc<T>) -> Ordering { (**self).cmp(&**other) }
 }
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T: Eq> Eq for Arc<T> {}
 
 impl<T: fmt::Show> fmt::Show for Arc<T> {
@@ -584,16 +588,16 @@ impl<T: fmt::Show> fmt::Show for Arc<T> {
     }
 }
 
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T: fmt::String> fmt::String for Arc<T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         fmt::String::fmt(&**self, f)
     }
 }
 
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T: Default + Sync + Send> Default for Arc<T> {
-    #[stable]
+    #[stable(feature = "grandfathered", since = "1.0.0")]
     fn default() -> Arc<T> { Arc::new(Default::default()) }
 }
 
diff --git a/src/liballoc/boxed.rs b/src/liballoc/boxed.rs
index a2cc98c7d01..6f41ccbf415 100644
--- a/src/liballoc/boxed.rs
+++ b/src/liballoc/boxed.rs
@@ -10,7 +10,7 @@
 
 //! A unique pointer type.
 
-#![stable]
+#![stable(feature = "grandfathered", since = "1.0.0")]
 
 use core::any::Any;
 use core::clone::Clone;
@@ -44,35 +44,36 @@ use core::ops::{Deref, DerefMut};
 /// }
 /// ```
 #[lang = "exchange_heap"]
-#[unstable = "may be renamed; uncertain about custom allocator design"]
+#[unstable(feature = "unnamed_feature", since = "1.0.0",
+           reason = "may be renamed; uncertain about custom allocator design")]
 pub static HEAP: () = ();
 
 /// A type that represents a uniquely-owned value.
 #[lang = "owned_box"]
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 pub struct Box<T>(Unique<T>);
 
 impl<T> Box<T> {
     /// Moves `x` into a freshly allocated box on the global exchange heap.
-    #[stable]
+    #[stable(feature = "grandfathered", since = "1.0.0")]
     pub fn new(x: T) -> Box<T> {
         box x
     }
 }
 
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T: Default> Default for Box<T> {
-    #[stable]
+    #[stable(feature = "grandfathered", since = "1.0.0")]
     fn default() -> Box<T> { box Default::default() }
 }
 
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T> Default for Box<[T]> {
-    #[stable]
+    #[stable(feature = "grandfathered", since = "1.0.0")]
     fn default() -> Box<[T]> { box [] }
 }
 
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T: Clone> Clone for Box<T> {
     /// Returns a copy of the owned box.
     #[inline]
@@ -85,14 +86,14 @@ impl<T: Clone> Clone for Box<T> {
     }
 }
 
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T: ?Sized + PartialEq> PartialEq for Box<T> {
     #[inline]
     fn eq(&self, other: &Box<T>) -> bool { PartialEq::eq(&**self, &**other) }
     #[inline]
     fn ne(&self, other: &Box<T>) -> bool { PartialEq::ne(&**self, &**other) }
 }
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T: ?Sized + PartialOrd> PartialOrd for Box<T> {
     #[inline]
     fn partial_cmp(&self, other: &Box<T>) -> Option<Ordering> {
@@ -107,14 +108,14 @@ impl<T: ?Sized + PartialOrd> PartialOrd for Box<T> {
     #[inline]
     fn gt(&self, other: &Box<T>) -> bool { PartialOrd::gt(&**self, &**other) }
 }
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T: ?Sized + Ord> Ord for Box<T> {
     #[inline]
     fn cmp(&self, other: &Box<T>) -> Ordering {
         Ord::cmp(&**self, &**other)
     }
 }
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T: ?Sized + Eq> Eq for Box<T> {}
 
 impl<S: hash::Hasher, T: ?Sized + Hash<S>> Hash<S> for Box<T> {
@@ -125,19 +126,20 @@ impl<S: hash::Hasher, T: ?Sized + Hash<S>> Hash<S> for Box<T> {
 }
 
 /// Extension methods for an owning `Any` trait object.
-#[unstable = "this trait will likely disappear once compiler bugs blocking \
-              a direct impl on `Box<Any>` have been fixed "]
+#[unstable(feature = "unnamed_feature", since = "1.0.0",
+           reason = "this trait will likely disappear once compiler bugs blocking \
+                     a direct impl on `Box<Any>` have been fixed ")]
 // FIXME(#18737): this should be a direct impl on `Box<Any>`. If you're
 //                removing this please make sure that you can downcase on
 //                `Box<Any + Send>` as well as `Box<Any>`
 pub trait BoxAny {
     /// Returns the boxed value if it is of type `T`, or
     /// `Err(Self)` if it isn't.
-    #[stable]
+    #[stable(feature = "grandfathered", since = "1.0.0")]
     fn downcast<T: 'static>(self) -> Result<Box<T>, Self>;
 }
 
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl BoxAny for Box<Any> {
     #[inline]
     fn downcast<T: 'static>(self) -> Result<Box<T>, Box<Any>> {
@@ -162,7 +164,7 @@ impl<T: ?Sized + fmt::Show> fmt::Show for Box<T> {
     }
 }
 
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T: ?Sized + fmt::String> fmt::String for Box<T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         fmt::String::fmt(&**self, f)
@@ -175,14 +177,14 @@ impl fmt::Show for Box<Any> {
     }
 }
 
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T: ?Sized> Deref for Box<T> {
     type Target = T;
 
     fn deref(&self) -> &T { &**self }
 }
 
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T: ?Sized> DerefMut for Box<T> {
     fn deref_mut(&mut self) -> &mut T { &mut **self }
 }
diff --git a/src/liballoc/heap.rs b/src/liballoc/heap.rs
index bd5b43b782e..0cb97410562 100644
--- a/src/liballoc/heap.rs
+++ b/src/liballoc/heap.rs
@@ -80,7 +80,7 @@ pub fn usable_size(size: uint, align: uint) -> uint {
 ///
 /// These statistics may be inconsistent if other threads use the allocator
 /// during the call.
-#[unstable]
+#[unstable(feature = "unnamed_feature", since = "1.0.0")]
 pub fn stats_print() {
     imp::stats_print();
 }
diff --git a/src/liballoc/lib.rs b/src/liballoc/lib.rs
index 811e32e747d..84527893374 100644
--- a/src/liballoc/lib.rs
+++ b/src/liballoc/lib.rs
@@ -57,7 +57,7 @@
 //! default global allocator. It is not compatible with the libc allocator API.
 
 #![crate_name = "alloc"]
-#![unstable]
+#![unstable(feature = "unnamed_feature", since = "1.0.0")]
 #![staged_api]
 #![crate_type = "rlib"]
 #![doc(html_logo_url = "http://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
diff --git a/src/liballoc/rc.rs b/src/liballoc/rc.rs
index 7191a7af346..0b8c518a3a5 100644
--- a/src/liballoc/rc.rs
+++ b/src/liballoc/rc.rs
@@ -142,7 +142,7 @@
 //! }
 //! ```
 
-#![stable]
+#![stable(feature = "grandfathered", since = "1.0.0")]
 
 use core::borrow::BorrowFrom;
 use core::cell::Cell;
@@ -173,8 +173,8 @@ struct RcBox<T> {
 ///
 /// See the [module level documentation](../index.html) for more details.
 #[unsafe_no_drop_flag]
-#[stable]
 #[cfg(stage0)] // NOTE remove impl after next snapshot
+#[stable(feature = "grandfathered", since = "1.0.0")]
 pub struct Rc<T> {
     // FIXME #12808: strange names to try to avoid interfering with field accesses of the contained
     // type via Deref
@@ -187,7 +187,7 @@ pub struct Rc<T> {
 ///
 /// See the [module level documentation](../index.html) for more details.
 #[unsafe_no_drop_flag]
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 #[cfg(not(stage0))] // NOTE remove cfg after next snapshot
 pub struct Rc<T> {
     // FIXME #12808: strange names to try to avoid interfering with field accesses of the contained
@@ -211,8 +211,8 @@ impl<T> Rc<T> {
     ///
     /// let five = Rc::new(5i);
     /// ```
-    #[stable]
     #[cfg(stage0)] // NOTE remove after next snapshot
+    #[stable(feature = "grandfathered", since = "1.0.0")]
     pub fn new(value: T) -> Rc<T> {
         unsafe {
             Rc {
@@ -239,7 +239,7 @@ impl<T> Rc<T> {
     ///
     /// let five = Rc::new(5i);
     /// ```
-    #[stable]
+    #[stable(feature = "grandfathered", since = "1.0.0")]
     #[cfg(not(stage0))] // NOTE remove cfg after next snapshot
     pub fn new(value: T) -> Rc<T> {
         unsafe {
@@ -268,7 +268,8 @@ impl<T> Rc<T> {
     /// let weak_five = five.downgrade();
     /// ```
     #[cfg(stage0)] // NOTE remove after next snapshot
-    #[unstable = "Weak pointers may not belong in this module"]
+    #[unstable(feature = "unnamed_feature", since = "1.0.0",
+               reason = "Weak pointers may not belong in this module")]
     pub fn downgrade(&self) -> Weak<T> {
         self.inc_weak();
         Weak {
@@ -290,7 +291,8 @@ impl<T> Rc<T> {
     /// let weak_five = five.downgrade();
     /// ```
     #[cfg(not(stage0))] // NOTE remove cfg after next snapshot
-    #[unstable = "Weak pointers may not belong in this module"]
+    #[unstable(feature = "unnamed_feature", since = "1.0.0",
+               reason = "Weak pointers may not belong in this module")]
     pub fn downgrade(&self) -> Weak<T> {
         self.inc_weak();
         Weak { _ptr: self._ptr }
@@ -299,12 +301,12 @@ impl<T> Rc<T> {
 
 /// Get the number of weak references to this value.
 #[inline]
-#[unstable]
+#[unstable(feature = "unnamed_feature", since = "1.0.0")]
 pub fn weak_count<T>(this: &Rc<T>) -> uint { this.weak() - 1 }
 
 /// Get the number of strong references to this value.
 #[inline]
-#[unstable]
+#[unstable(feature = "unnamed_feature", since = "1.0.0")]
 pub fn strong_count<T>(this: &Rc<T>) -> uint { this.strong() }
 
 /// Returns true if there are no other `Rc` or `Weak<T>` values that share the same inner value.
@@ -320,7 +322,7 @@ pub fn strong_count<T>(this: &Rc<T>) -> uint { this.strong() }
 /// rc::is_unique(&five);
 /// ```
 #[inline]
-#[unstable]
+#[unstable(feature = "unnamed_feature", since = "1.0.0")]
 pub fn is_unique<T>(rc: &Rc<T>) -> bool {
     weak_count(rc) == 0 && strong_count(rc) == 1
 }
@@ -342,7 +344,7 @@ pub fn is_unique<T>(rc: &Rc<T>) -> bool {
 /// assert_eq!(rc::try_unwrap(x), Err(Rc::new(4u)));
 /// ```
 #[inline]
-#[unstable]
+#[unstable(feature = "unnamed_feature", since = "1.0.0")]
 pub fn try_unwrap<T>(rc: Rc<T>) -> Result<T, Rc<T>> {
     if is_unique(&rc) {
         unsafe {
@@ -376,7 +378,7 @@ pub fn try_unwrap<T>(rc: Rc<T>) -> Result<T, Rc<T>> {
 /// assert!(rc::get_mut(&mut x).is_none());
 /// ```
 #[inline]
-#[unstable]
+#[unstable(feature = "unnamed_feature", since = "1.0.0")]
 pub fn get_mut<'a, T>(rc: &'a mut Rc<T>) -> Option<&'a mut T> {
     if is_unique(rc) {
         let inner = unsafe { &mut **rc._ptr };
@@ -402,7 +404,7 @@ impl<T: Clone> Rc<T> {
     /// let mut_five = five.make_unique();
     /// ```
     #[inline]
-    #[unstable]
+    #[unstable(feature = "unnamed_feature", since = "1.0.0")]
     pub fn make_unique(&mut self) -> &mut T {
         if !is_unique(self) {
             *self = Rc::new((**self).clone())
@@ -422,7 +424,7 @@ impl<T> BorrowFrom<Rc<T>> for T {
     }
 }
 
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T> Deref for Rc<T> {
     type Target = T;
 
@@ -433,7 +435,7 @@ impl<T> Deref for Rc<T> {
 }
 
 #[unsafe_destructor]
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T> Drop for Rc<T> {
     /// Drops the `Rc<T>`.
     ///
@@ -481,7 +483,7 @@ impl<T> Drop for Rc<T> {
     }
 }
 
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T> Clone for Rc<T> {
     /// Makes a clone of the `Rc<T>`.
     ///
@@ -524,7 +526,7 @@ impl<T> Clone for Rc<T> {
     }
 }
 
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T: Default> Default for Rc<T> {
     /// Creates a new `Rc<T>`, with the `Default` value for `T`.
     ///
@@ -537,13 +539,13 @@ impl<T: Default> Default for Rc<T> {
     /// let x: Rc<int> = Default::default();
     /// ```
     #[inline]
-    #[stable]
+    #[stable(feature = "grandfathered", since = "1.0.0")]
     fn default() -> Rc<T> {
         Rc::new(Default::default())
     }
 }
 
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T: PartialEq> PartialEq for Rc<T> {
     /// Equality for two `Rc<T>`s.
     ///
@@ -578,10 +580,10 @@ impl<T: PartialEq> PartialEq for Rc<T> {
     fn ne(&self, other: &Rc<T>) -> bool { **self != **other }
 }
 
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T: Eq> Eq for Rc<T> {}
 
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T: PartialOrd> PartialOrd for Rc<T> {
     /// Partial comparison for two `Rc<T>`s.
     ///
@@ -666,7 +668,7 @@ impl<T: PartialOrd> PartialOrd for Rc<T> {
     fn ge(&self, other: &Rc<T>) -> bool { **self >= **other }
 }
 
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T: Ord> Ord for Rc<T> {
     /// Comparison for two `Rc<T>`s.
     ///
@@ -693,14 +695,14 @@ impl<S: hash::Hasher, T: Hash<S>> Hash<S> for Rc<T> {
     }
 }
 
-#[unstable = "Show is experimental."]
+#[unstable(feature = "unnamed_feature", since = "1.0.0", reason = "Show is experimental.")]
 impl<T: fmt::Show> fmt::Show for Rc<T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         write!(f, "Rc({:?})", **self)
     }
 }
 
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T: fmt::String> fmt::String for Rc<T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         fmt::String::fmt(&**self, f)
@@ -713,8 +715,9 @@ impl<T: fmt::String> fmt::String for Rc<T> {
 ///
 /// See the [module level documentation](../index.html) for more.
 #[unsafe_no_drop_flag]
-#[unstable = "Weak pointers may not belong in this module."]
 #[cfg(stage0)] // NOTE remove impl after next snapshot
+#[unstable(feature = "unnamed_feature", since = "1.0.0",
+           reason = "Weak pointers may not belong in this module.")]
 pub struct Weak<T> {
     // FIXME #12808: strange names to try to avoid interfering with
     // field accesses of the contained type via Deref
@@ -729,7 +732,8 @@ pub struct Weak<T> {
 ///
 /// See the [module level documentation](../index.html) for more.
 #[unsafe_no_drop_flag]
-#[unstable = "Weak pointers may not belong in this module."]
+#[unstable(feature = "unnamed_feature", since = "1.0.0",
+           reason = "Weak pointers may not belong in this module.")]
 #[cfg(not(stage0))] // NOTE remove cfg after next snapshot
 pub struct Weak<T> {
     // FIXME #12808: strange names to try to avoid interfering with
@@ -746,7 +750,8 @@ impl<T> !marker::Send for Weak<T> {}
 impl<T> !marker::Sync for Weak<T> {}
 
 
-#[unstable = "Weak pointers may not belong in this module."]
+#[unstable(feature = "unnamed_feature", since = "1.0.0",
+           reason = "Weak pointers may not belong in this module.")]
 impl<T> Weak<T> {
     /// Upgrades a weak reference to a strong reference.
     ///
@@ -804,7 +809,7 @@ impl<T> Weak<T> {
 }
 
 #[unsafe_destructor]
-#[stable]
+#[stable(feature = "grandfathered", since = "1.0.0")]
 impl<T> Drop for Weak<T> {
     /// Drops the `Weak<T>`.
     ///
@@ -847,7 +852,8 @@ impl<T> Drop for Weak<T> {
     }
 }
 
-#[unstable = "Weak pointers may not belong in this module."]
+#[unstable(feature = "unnamed_feature", since = "1.0.0",
+           reason = "Weak pointers may not belong in this module.")]
 impl<T> Clone for Weak<T> {
     /// Makes a clone of the `Weak<T>`.
     ///
@@ -890,7 +896,7 @@ impl<T> Clone for Weak<T> {
     }
 }
 
-#[unstable = "Show is experimental."]
+#[unstable(feature = "unnamed_feature", since = "1.0.0", reason = "Show is experimental.")]
 impl<T: fmt::Show> fmt::Show for Weak<T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         write!(f, "(Weak)")