Fixed errors in libstd.

2 files changed, 2 insertions, 2 deletions

diff --git a/src/libstd/error.rs b/src/libstd/error.rs
index d1c2bfb96b3..401552a6ec4 100644
--- a/src/libstd/error.rs
+++ b/src/libstd/error.rs
@@ -514,7 +514,7 @@ mod tests {
     #[test]
     fn downcasting() {
         let mut a = A;
-        let mut a = &mut a as &mut (Error + 'static);
+        let a = &mut a as &mut (Error + 'static);
         assert_eq!(a.downcast_ref::<A>(), Some(&A));
         assert_eq!(a.downcast_ref::<B>(), None);
         assert_eq!(a.downcast_mut::<A>(), Some(&mut A));
diff --git a/src/libstd/io/cursor.rs b/src/libstd/io/cursor.rs
index 616b4f47ed3..d986021a18b 100644
--- a/src/libstd/io/cursor.rs
+++ b/src/libstd/io/cursor.rs
@@ -456,7 +456,7 @@ mod tests {
     #[test]
     fn test_slice_reader() {
         let in_buf = vec![0, 1, 2, 3, 4, 5, 6, 7];
-        let mut reader = &mut &in_buf[..];
+        let reader = &mut &in_buf[..];
         let mut buf = [];
         assert_eq!(reader.read(&mut buf).unwrap(), 0);
         let mut buf = [0];