Auto merge of #21677 - japaric:no-range, r=alexcrichton

Note: Do not merge until we get a newer snapshot that includes #21374

There was some type inference fallout (see 4th commit) because type inference with `a..b` is not as good as with `range(a, b)` (see #21672).

r? @alexcrichton

src/liballoc/arc.rs

@@ -37,7 +37,7 @@
 //!
 //! let five = Arc::new(5i);
 //!
-//! for _ in range(0u, 10) {
+//! for _ in 0u..10 {
 //!     let five = five.clone();
 //!
 //!     Thread::spawn(move || {
@@ -54,7 +54,7 @@
 //!
 //! let five = Arc::new(Mutex::new(5i));
 //!
-//! for _ in range(0u, 10) {
+//! for _ in 0u..10 {
 //!     let five = five.clone();
 //!
 //!     Thread::spawn(move || {
@@ -95,10 +95,10 @@ use heap::deallocate;
 /// use std::thread::Thread;
 ///
 /// fn main() {
-///     let numbers: Vec<_> = range(0, 100u32).map(|i| i as f32).collect();
+///     let numbers: Vec<_> = (0..100u32).map(|i| i as f32).collect();
 ///     let shared_numbers = Arc::new(numbers);
 ///
-///     for _ in range(0u, 10) {
+///     for _ in 0u..10 {
 ///         let child_numbers = shared_numbers.clone();
 ///
 ///         Thread::spawn(move || {
@@ -814,6 +814,6 @@ mod tests {
     }
 
     // Make sure deriving works with Arc<T>
-    #[derive(Eq, Ord, PartialEq, PartialOrd, Clone, Show, Default)]
+    #[derive(Eq, Ord, PartialEq, PartialOrd, Clone, Debug, Default)]
     struct Foo { inner: Arc<int> }
 }

src/liballoc/boxed.rs

@@ -29,7 +29,7 @@
 //! Creating a recursive data structure:
 //!
 //! ```
-//! #[derive(Show)]
+//! #[derive(Debug)]
 //! enum List<T> {
 //!     Cons(T, Box<List<T>>),
 //!     Nil,
@@ -250,8 +250,6 @@ impl<T: ?Sized> DerefMut for Box<T> {
     fn deref_mut(&mut self) -> &mut T { &mut **self }
 }
 
-// FIXME(#21363) remove `old_impl_check` when bug is fixed
-#[old_impl_check]
 impl<'a, T> Iterator for Box<Iterator<Item=T> + 'a> {
     type Item = T;
 

src/liballoc/lib.rs

@@ -70,8 +70,6 @@
 #![feature(lang_items, unsafe_destructor)]
 #![feature(box_syntax)]
 #![feature(optin_builtin_traits)]
-// FIXME(#21363) remove `old_impl_check` when bug is fixed
-#![feature(old_impl_check)]
 #![allow(unknown_features)] #![feature(int_uint)]
 #![feature(core)]
 #![feature(hash)]