fixes/improvements thanks to @Manishearth

src/libserialize/json.rs

@@ -1324,7 +1324,7 @@ impl Stack {
     pub fn is_equal_to(&self, rhs: &[StackElement]) -> bool {
         if self.stack.len() != rhs.len() { return false; }
         for (i, r) in rhs.iter().enumerate() {
-            if &self.get(i) != r { return false; }
+            if self.get(i) != *r { return false; }
         }
         true
     }
@@ -1334,7 +1334,7 @@ impl Stack {
     pub fn starts_with(&self, rhs: &[StackElement]) -> bool {
         if self.stack.len() < rhs.len() { return false; }
         for (i, r) in rhs.iter().enumerate() {
-            if &self.get(i) != r { return false; }
+            if self.get(i) != *r { return false; }
         }
         true
     }
@@ -1345,7 +1345,7 @@ impl Stack {
         if self.stack.len() < rhs.len() { return false; }
         let offset = self.stack.len() - rhs.len();
         for (i, r) in rhs.iter().enumerate() {
-            if &self.get(i + offset) != r { return false; }
+            if self.get(i + offset) != *r { return false; }
         }
         true
     }

src/libstd/sys/unix/os.rs

@@ -141,8 +141,7 @@ pub fn split_paths(unparsed: &OsStr) -> SplitPaths {
     fn is_colon(b: &u8) -> bool { *b == b':' }
     let unparsed = unparsed.as_bytes();
     SplitPaths {
-        iter: unparsed.split(is_colon as fn(&u8) -> bool)
-                      .map(bytes_to_path as fn(&[u8]) -> PathBuf)
+        iter: unparsed.split(is_colon).map(bytes_to_path)
     }
 }
 

src/libtest/stats.rs

@@ -169,7 +169,6 @@ impl Stats for [f64] {
             // This inner loop applies `hi`/`lo` summation to each
             // partial so that the list of partial sums remains exact.
             for mut y in &mut partials {
-                let mut y: f64 = partials[i];
                 if x.abs() < y.abs() {
                     mem::swap(&mut x, &mut y);
                 }