1 files changed, 2 insertions, 2 deletions
diff --git a/compiler/rustc_serialize/src/serialize.rs b/compiler/rustc_serialize/src/serialize.rs
index e32e4493726..6671c7c0fa6 100644
--- a/compiler/rustc_serialize/src/serialize.rs
+++ b/compiler/rustc_serialize/src/serialize.rs
@@ -500,8 +500,8 @@ impl<D: Decoder, const N: usize> Decodable<D> for [u8; N] {
         d.read_seq(|d, len| {
             assert!(len == N);
             let mut v = [0u8; N];
-            for i in 0..len {
-                v[i] = d.read_seq_elt(|d| Decodable::decode(d))?;
+            for x in &mut v {
+                *x = d.read_seq_elt(|d| Decodable::decode(d))?;
             }
             Ok(v)
         })