---

yaml
---
r: 183931
b: refs/heads/master
c: d801a4d
h: refs/heads/master
i:
  183929: 3d65b78
  183927: 8529721
v: v3

Author: nikomatsakis

[refs]

@@ -1,5 +1,5 @@
 ---
-refs/heads/master: 1735e41d1cbbe0666e188ccf3a064e5c8afb482c
+refs/heads/master: d801a4da7cc8672c3b7655ccad218ab892b8dd9b
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
 refs/heads/snap-stage3: 522d09dfecbeca1595f25ac58c6d0178bbd21d7d
 refs/heads/try: ccf8fedf1cffcb8f6f3581d53d220039e192fe77

trunk/src/libcore/iter.rs

@@ -62,6 +62,7 @@ use clone::Clone;
 use cmp;
 use cmp::Ord;
 use default::Default;
+use marker;
 use mem;
 use num::{ToPrimitive, Int};
 use ops::{Add, Deref, FnMut};
@@ -947,7 +948,7 @@ pub trait IteratorExt: Iterator + Sized {
         FromB: Default + Extend<B>,
         Self: Iterator<Item=(A, B)>,
     {
-        struct SizeHint<A>(usize, Option<usize>);
+        struct SizeHint<A>(usize, Option<usize>, marker::PhantomData<A>);
         impl<A> Iterator for SizeHint<A> {
             type Item = A;
 
@@ -961,8 +962,8 @@ pub trait IteratorExt: Iterator + Sized {
         let mut ts: FromA = Default::default();
         let mut us: FromB = Default::default();
 
-        ts.extend(SizeHint(lo, hi));
-        us.extend(SizeHint(lo, hi));
+        ts.extend(SizeHint(lo, hi, marker::PhantomData));
+        us.extend(SizeHint(lo, hi, marker::PhantomData));
 
         for (t, u) in self {
             ts.extend(Some(t).into_iter());
@@ -2047,8 +2048,8 @@ pub struct Scan<I, St, F> {
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
-impl<B, I: Iterator, St, F> Iterator for Scan<I, St, F> where
-    F: FnMut(&mut St, I::Item) -> Option<B>,
+impl<A, B, I: Iterator<Item=A>, St, F> Iterator for Scan<I, St, F> where
+    F: FnMut(&mut St, A) -> Option<B>,
 {
     type Item = B;