4 files changed, 7 insertions, 6 deletions
diff --git a/src/libstd/collections/hash/map.rs b/src/libstd/collections/hash/map.rs
index 1b9f8b99017..61b531054a0 100644
--- a/src/libstd/collections/hash/map.rs
+++ b/src/libstd/collections/hash/map.rs
@@ -1570,7 +1570,7 @@ impl<K, V, S, H> Extend<(K, V)> for HashMap<K, V, S>
           S: HashState<Hasher=H>,
           H: hash::Hasher<Output=u64>
 {
-    fn extend<T: Iterator<Item=(K, V)>>(&mut self, iter: T) {
+    fn extend<T: IntoIterator<Item=(K, V)>>(&mut self, iter: T) {
         for (k, v) in iter {
             self.insert(k, v);
         }
diff --git a/src/libstd/collections/hash/set.rs b/src/libstd/collections/hash/set.rs
index 5fbbcb3b347..f5e57b78d2a 100644
--- a/src/libstd/collections/hash/set.rs
+++ b/src/libstd/collections/hash/set.rs
@@ -636,7 +636,7 @@ impl<T, S, H> Extend<T> for HashSet<T, S>
           S: HashState<Hasher=H>,
           H: hash::Hasher<Output=u64>
 {
-    fn extend<I: Iterator<Item=T>>(&mut self, iter: I) {
+    fn extend<I: IntoIterator<Item=T>>(&mut self, iter: I) {
         for k in iter {
             self.insert(k);
         }
diff --git a/src/libstd/path.rs b/src/libstd/path.rs
index 1d992668900..f25cc83b93e 100755
--- a/src/libstd/path.rs
+++ b/src/libstd/path.rs
@@ -110,7 +110,7 @@ use core::prelude::*;
 use ascii::*;
 use borrow::BorrowFrom;
 use cmp;
-use iter;
+use iter::{self, IntoIterator};
 use mem;
 use ops::{self, Deref};
 use string::CowString;
@@ -961,7 +961,7 @@ impl<'a, P: ?Sized + 'a> iter::FromIterator<&'a P> for PathBuf where P: AsPath {
 }
 
 impl<'a, P: ?Sized + 'a> iter::Extend<&'a P> for PathBuf where P: AsPath {
-    fn extend<I: Iterator<Item = &'a P>>(&mut self, iter: I) {
+    fn extend<I: IntoIterator<Item = &'a P>>(&mut self, iter: I) {
         for p in iter {
             self.push(p)
         }
diff --git a/src/libstd/sys/common/wtf8.rs b/src/libstd/sys/common/wtf8.rs
index b610f6c370b..e7cb67c6287 100644
--- a/src/libstd/sys/common/wtf8.rs
+++ b/src/libstd/sys/common/wtf8.rs
@@ -32,7 +32,7 @@ use borrow::Cow;
 use cmp;
 use fmt;
 use hash::{Hash, Writer, Hasher};
-use iter::FromIterator;
+use iter::{FromIterator, IntoIterator};
 use mem;
 use num::Int;
 use ops;
@@ -368,7 +368,8 @@ impl FromIterator<CodePoint> for Wtf8Buf {
 /// This replaces surrogate code point pairs with supplementary code points,
 /// like concatenating ill-formed UTF-16 strings effectively would.
 impl Extend<CodePoint> for Wtf8Buf {
-    fn extend<T: Iterator<Item=CodePoint>>(&mut self, iterator: T) {
+    fn extend<T: IntoIterator<Item=CodePoint>>(&mut self, iterable: T) {
+        let iterator = iterable.into_iter();
         let (low, _high) = iterator.size_hint();
         // Lower bound of one byte per code point (ASCII only)
         self.bytes.reserve(low);