4 files changed, 9 insertions, 9 deletions
diff --git a/src/libcore/ops/function.rs b/src/libcore/ops/function.rs
index 62bf69336a3..c5b3fbca1a6 100644
--- a/src/libcore/ops/function.rs
+++ b/src/libcore/ops/function.rs
@@ -187,7 +187,7 @@ mod impls {
         where F : FnMut<A>
     {
         type Output = F::Output;
-        extern "rust-call" fn call_once(mut self, args: A) -> F::Output {
+        extern "rust-call" fn call_once(self, args: A) -> F::Output {
             (*self).call_mut(args)
         }
     }
diff --git a/src/libcore/option.rs b/src/libcore/option.rs
index ef41b679410..aecf2ee9325 100644
--- a/src/libcore/option.rs
+++ b/src/libcore/option.rs
@@ -872,7 +872,7 @@ impl<'a, T> IntoIterator for &'a mut Option<T> {
     type Item = &'a mut T;
     type IntoIter = IterMut<'a, T>;
 
-    fn into_iter(mut self) -> IterMut<'a, T> {
+    fn into_iter(self) -> IterMut<'a, T> {
         self.iter_mut()
     }
 }
diff --git a/src/libcore/result.rs b/src/libcore/result.rs
index 88a93492de9..20cfb02afcc 100644
--- a/src/libcore/result.rs
+++ b/src/libcore/result.rs
@@ -909,7 +909,7 @@ impl<'a, T, E> IntoIterator for &'a mut Result<T, E> {
     type Item = &'a mut T;
     type IntoIter = IterMut<'a, T>;
 
-    fn into_iter(mut self) -> IterMut<'a, T> {
+    fn into_iter(self) -> IterMut<'a, T> {
         self.iter_mut()
     }
 }
diff --git a/src/libcore/tests/slice.rs b/src/libcore/tests/slice.rs
index e5d6b53b570..8c31d2e83d3 100644
--- a/src/libcore/tests/slice.rs
+++ b/src/libcore/tests/slice.rs
@@ -105,27 +105,27 @@ fn test_chunks_last() {
 
 #[test]
 fn test_chunks_mut_count() {
-    let mut v: &mut [i32] = &mut [0, 1, 2, 3, 4, 5];
+    let v: &mut [i32] = &mut [0, 1, 2, 3, 4, 5];
     let c = v.chunks_mut(3);
     assert_eq!(c.count(), 2);
 
-    let mut v2: &mut [i32] = &mut [0, 1, 2, 3, 4];
+    let v2: &mut [i32] = &mut [0, 1, 2, 3, 4];
     let c2 = v2.chunks_mut(2);
     assert_eq!(c2.count(), 3);
 
-    let mut v3: &mut [i32] = &mut [];
+    let v3: &mut [i32] = &mut [];
     let c3 = v3.chunks_mut(2);
     assert_eq!(c3.count(), 0);
 }
 
 #[test]
 fn test_chunks_mut_nth() {
-    let mut v: &mut [i32] = &mut [0, 1, 2, 3, 4, 5];
+    let v: &mut [i32] = &mut [0, 1, 2, 3, 4, 5];
     let mut c = v.chunks_mut(2);
     assert_eq!(c.nth(1).unwrap()[1], 3);
     assert_eq!(c.next().unwrap()[0], 4);
 
-    let mut v2: &mut [i32] = &mut [0, 1, 2, 3, 4];
+    let v2: &mut [i32] = &mut [0, 1, 2, 3, 4];
     let mut c2 = v2.chunks_mut(3);
     assert_eq!(c2.nth(1).unwrap()[1], 4);
     assert_eq!(c2.next(), None);
@@ -194,7 +194,7 @@ fn get_range() {
 
 #[test]
 fn get_mut_range() {
-    let mut v: &mut [i32] = &mut [0, 1, 2, 3, 4, 5];
+    let v: &mut [i32] = &mut [0, 1, 2, 3, 4, 5];
     assert_eq!(v.get_mut(..), Some(&mut [0, 1, 2, 3, 4, 5][..]));
     assert_eq!(v.get_mut(..2), Some(&mut [0, 1][..]));
     assert_eq!(v.get_mut(2..), Some(&mut [2, 3, 4, 5][..]));