diff --git a/src/base64/base64.rs b/src/base64/base64.rs
index e09b08c18..713e48894 100644
--- a/src/base64/base64.rs
+++ b/src/base64/base64.rs
@@ -104,7 +104,7 @@ fn decode(input: &mut Reader, ignore_garbage: bool) {
     let slice =
         if ignore_garbage {
             to_decode.as_slice()
-                .trim_chars(|c: char| {
+                .trim_chars(|&: c: char| {
                     let num = match c.to_ascii_opt() {
                         Some(ascii) => ascii.as_byte(),
                         None => return false
diff --git a/src/du/du.rs b/src/du/du.rs
index 819afa524..f98ff1a40 100644
--- a/src/du/du.rs
+++ b/src/du/du.rs
@@ -62,7 +62,7 @@ fn du(path: &Path, mut my_stat: Stat,
             let this_stat = Stat{path: f.clone(), fstat: safe_unwrap!(fs::lstat(&f))};
             if this_stat.fstat.kind == FileType::Directory {
                 let oa_clone = options.clone();
-                futures.push(Future::spawn(proc() { du(&f, this_stat, oa_clone, depth + 1) }))
+                futures.push(Future::spawn(move || { du(&f, this_stat, oa_clone, depth + 1) }))
             } else {
                 my_stat.fstat.size += this_stat.fstat.size;
                 my_stat.fstat.unstable.blocks += this_stat.fstat.unstable.blocks;
diff --git a/src/fmt/parasplit.rs b/src/fmt/parasplit.rs
index d4094b2ba..9680484c9 100644
--- a/src/fmt/parasplit.rs
+++ b/src/fmt/parasplit.rs
@@ -528,7 +528,7 @@ impl<'a> Iterator<WordInfo<'a>> for WordSplit<'a> {
         let mut word_nchars = 0;
         self.position =
             match self.string.slice_from(word_start)
-            .find(|x: char| if !x.is_whitespace() { word_nchars += char_width(x); false } else { true }) {
+            .find(|&mut: x: char| if !x.is_whitespace() { word_nchars += char_width(x); false } else { true }) {
                 None => self.length,
                 Some(s) => s + word_start
             };
diff --git a/src/fold/fold.rs b/src/fold/fold.rs
index ba8c4ca56..34fc38078 100644
--- a/src/fold/fold.rs
+++ b/src/fold/fold.rs
@@ -124,7 +124,7 @@ fn fold_file<T: io::Reader>(file: BufferedReader<T>, bytes: bool, spaces: bool,
                 let slice = {
                     let slice = line.slice(i, i + width);
                     if spaces && i + width < len {
-                        match slice.rfind(|ch: char| ch.is_whitespace()) {
+                        match slice.rfind(|&: ch: char| ch.is_whitespace()) {
                             Some(m) => slice.slice_to(m + 1),
                             None => slice
                         }
diff --git a/src/mv/mv.rs b/src/mv/mv.rs
index e3dabd008..4b5bc0b84 100644
--- a/src/mv/mv.rs
+++ b/src/mv/mv.rs
@@ -160,7 +160,7 @@ pub fn uumain(args: Vec<String>) -> int {
         verbose: matches.opt_present("v"),
     };
 
-    let string_to_path = |s: &String| { Path::new(s.as_slice()) };
+    let string_to_path = |&: s: &String| { Path::new(s.as_slice()) };
     let paths: Vec<Path> = matches.free.iter().map(string_to_path).collect();
 
     if matches.opt_present("version") {