Add some missing stability attributes on struct fields.

src/libcore/str/mod.rs

@@ -939,6 +939,7 @@ impl<'a, P: Pattern<'a>> Iterator for SplitStr<'a, P> {
     type Item = &'a str;
 
     #[inline]
+    #[allow(deprecated)]
     fn next(&mut self) -> Option<&'a str> {
         Iterator::next(&mut self.0)
     }

src/libstd/sync/mpsc/mod.rs

@@ -384,7 +384,7 @@ impl<T> !Sync for SyncSender<T> {}
 /// contains the data being sent as a payload so it can be recovered.
 #[stable(feature = "rust1", since = "1.0.0")]
 #[derive(PartialEq, Eq, Clone, Copy)]
-pub struct SendError<T>(pub T);
+pub struct SendError<T>(#[stable(feature = "rust1", since = "1.0.0")] pub T);
 
 /// An error returned from the `recv` function on a `Receiver`.
 ///

src/libstd/thread_local/mod.rs

@@ -105,10 +105,12 @@ pub struct Key<T> {
     // This is trivially devirtualizable by LLVM because we never store anything
     // to this field and rustc can declare the `static` as constant as well.
     #[doc(hidden)]
+    #[unstable(feature = "thread_local_internals")]
     pub inner: fn() -> &'static __impl::KeyInner<UnsafeCell<Option<T>>>,
 
     // initialization routine to invoke to create a value
     #[doc(hidden)]
+    #[unstable(feature = "thread_local_internals")]
     pub init: fn() -> T,
 }