diff --git a/benches/bench_log.rs b/benches/bench_log.rs
index 61e15b4a..65796ca2 100644
--- a/benches/bench_log.rs
+++ b/benches/bench_log.rs
@@ -1,4 +1,4 @@
-#![feature(custom_derive, collections, core, io, plugin, test)]
+#![feature(custom_derive, collections, core, plugin, test)]
 #![allow(non_camel_case_types)]
 #![plugin(serde_macros)]
 
diff --git a/benches/bench_map.rs b/benches/bench_map.rs
index 50b243d4..601a7640 100644
--- a/benches/bench_map.rs
+++ b/benches/bench_map.rs
@@ -1,4 +1,4 @@
-#![feature(custom_derive, core, plugin, test)]
+#![feature(custom_derive, plugin, test)]
 #![plugin(serde_macros)]
 
 extern crate serde;
@@ -403,7 +403,7 @@ fn bench_decoder_000(b: &mut Bencher) {
 fn bench_decoder_003(b: &mut Bencher) {
     b.iter(|| {
         let mut m: HashMap<String, isize> = HashMap::new();
-        for i in range(0, 3) {
+        for i in (0 .. 3) {
             m.insert(i.to_string(), i);
         }
         run_decoder(decoder::IsizeDecoder::new(m.clone()), m)
@@ -414,7 +414,7 @@ fn bench_decoder_003(b: &mut Bencher) {
 fn bench_decoder_100(b: &mut Bencher) {
     b.iter(|| {
         let mut m: HashMap<String, isize> = HashMap::new();
-        for i in range(0, 100) {
+        for i in (0 .. 100) {
             m.insert(i.to_string(), i);
         }
         run_decoder(decoder::IsizeDecoder::new(m.clone()), m)
@@ -443,7 +443,7 @@ fn bench_deserializer_000(b: &mut Bencher) {
 fn bench_deserializer_003(b: &mut Bencher) {
     b.iter(|| {
         let mut m: HashMap<String, isize> = HashMap::new();
-        for i in range(0, 3) {
+        for i in (0 .. 3) {
             m.insert(i.to_string(), i);
         }
         run_deserializer(deserializer::IsizeDeserializer::new(m.clone()), m)
@@ -454,7 +454,7 @@ fn bench_deserializer_003(b: &mut Bencher) {
 fn bench_deserializer_100(b: &mut Bencher) {
     b.iter(|| {
         let mut m: HashMap<String, isize> = HashMap::new();
-        for i in range(0, 100) {
+        for i in (0 .. 100) {
             m.insert(i.to_string(), i);
         }
         run_deserializer(deserializer::IsizeDeserializer::new(m.clone()), m)
diff --git a/benches/bench_vec.rs b/benches/bench_vec.rs
index 90706963..2d96548b 100644
--- a/benches/bench_vec.rs
+++ b/benches/bench_vec.rs
@@ -1,4 +1,4 @@
-#![feature(core, plugin, test)]
+#![feature(plugin, test)]
 #![plugin(serde_macros)]
 
 extern crate serde;
@@ -537,7 +537,7 @@ fn bench_decoder_usize_003(b: &mut Bencher) {
 #[bench]
 fn bench_decoder_usize_100(b: &mut Bencher) {
     b.iter(|| {
-        let v: Vec<usize> = range(0, 100).collect();
+        let v: Vec<usize> = (0 .. 100).collect();
         run_decoder(decoder::UsizeDecoder::new(v.clone()), v)
     })
 }
@@ -561,7 +561,7 @@ fn bench_decoder_u8_003(b: &mut Bencher) {
 #[bench]
 fn bench_decoder_u8_100(b: &mut Bencher) {
     b.iter(|| {
-        let v: Vec<u8> = range(0u8, 100).collect();
+        let v: Vec<u8> = (0 .. 100).collect();
         run_decoder(decoder::U8Decoder::new(v.clone()), v)
     })
 }
@@ -585,7 +585,7 @@ fn bench_deserializer_usize_003(b: &mut Bencher) {
 #[bench]
 fn bench_deserializer_usize_100(b: &mut Bencher) {
     b.iter(|| {
-        let v: Vec<usize> = range(0, 100).collect();
+        let v: Vec<usize> = (0 .. 100).collect();
         run_deserializer(deserializer::Deserializer::new(v.clone()), v)
     })
 }
@@ -609,7 +609,7 @@ fn bench_deserializer_u8_003(b: &mut Bencher) {
 #[bench]
 fn bench_deserializer_u8_100(b: &mut Bencher) {
     b.iter(|| {
-        let v: Vec<u8> = range(0u8, 100).collect();
+        let v: Vec<u8> = (0 .. 100).collect();
         run_deserializer(deserializer::Deserializer::new(v.clone()), v)
     })
 }
diff --git a/serde_macros/src/de.rs b/serde_macros/src/de.rs
index ea2d68bf..ff512979 100644
--- a/serde_macros/src/de.rs
+++ b/serde_macros/src/de.rs
@@ -289,7 +289,7 @@ fn deserialize_seq(
     struct_path: ast::Path,
     fields: usize,
 ) -> P<ast::Expr> {
-    let let_values: Vec<P<_>> = (0 .. fields)
+    let let_values: Vec<P<ast::Stmt>> = (0 .. fields)
         .map(|i| {
             let name = builder.id(format!("__field{}", i));
             quote_stmt!(cx,
@@ -299,7 +299,7 @@ fn deserialize_seq(
                         return Err(::serde::de::Error::end_of_stream_error());
                     }
                 };
-            )
+            ).unwrap()
         })
         .collect();
 
@@ -659,7 +659,7 @@ fn deserialize_map(
 
     // Declare each field.
     let let_values: Vec<P<ast::Stmt>> = field_names.iter()
-        .map(|field_name| quote_stmt!(cx, let mut $field_name = None;))
+        .map(|field_name| quote_stmt!(cx, let mut $field_name = None;).unwrap())
         .collect();
 
     // Match arms to extract a value for a field.
@@ -692,7 +692,7 @@ fn deserialize_map(
                     Some($field_name) => $field_name,
                     None => $missing_expr,
                 };
-            )
+            ).unwrap()
         })
         .collect();
 
diff --git a/src/lib.rs b/src/lib.rs
index 85fd10c5..60257b97 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,4 @@
-#![feature(core, io, std_misc, unicode)]
+#![feature(core, std_misc, unicode)]
 
 extern crate unicode;