Fix build with rust nightly Dec-20-2014

src/paste/paste.rs

@@ -62,7 +62,8 @@ fn paste(filenames: Vec<String>, serial: bool, delimiters: &str) {
             if name.as_slice() == "-" {
                 box io::stdio::stdin_raw() as Box<Reader>
             } else {
-                box crash_if_err!(1, io::File::open(&Path::new(name))) as Box<Reader>
+                let r = crash_if_err!(1, io::File::open(&Path::new(name)));
+                box r as Box<Reader>
             }
         )
     ).collect();

src/split/split.rs

@@ -221,10 +221,11 @@ fn split(settings: &Settings) -> int {
         if settings.input.as_slice() == "-" {
             box io::stdio::stdin_raw() as Box<Reader>
         } else {
-            box match io::File::open(&Path::new(settings.input.clone())) {
+            let r = match io::File::open(&Path::new(settings.input.clone())) {
                 Ok(a) => a,
                 Err(_) => crash!(1, "cannot open '{}' for reading: No such file or directory", settings.input)
-            } as Box<Reader>
+            };
+            box r as Box<Reader>
         }
     );
 

src/tac/tac.rs

@@ -75,7 +75,8 @@ fn tac(filenames: Vec<String>, before: bool, _: bool, separator: &str) {
             if filename.as_slice() == "-" {
                 box io::stdio::stdin_raw() as Box<Reader>
             } else {
-                box crash_if_err!(1, io::File::open(&Path::new(filename))) as Box<Reader>
+                let r = crash_if_err!(1, io::File::open(&Path::new(filename)));
+                box r as Box<Reader>
             }
         );
         let mut data = crash_if_err!(1, file.read_to_string());

src/uniq/uniq.rs

@@ -196,7 +196,8 @@ fn open_input_file(in_file_name: String) -> io::BufferedReader<Box<Reader+'stati
     } else {
         let path = Path::new(in_file_name);
         let in_file = io::File::open(&path);
-        box crash_if_err!(1, in_file) as Box<Reader>
+        let r = crash_if_err!(1, in_file);
+        box r as Box<Reader>
     };
     io::BufferedReader::new(in_file)
 }
@@ -207,7 +208,8 @@ fn open_output_file(out_file_name: String) -> io::BufferedWriter<Box<Writer+'sta
     } else {
         let path = Path::new(out_file_name);
         let in_file = io::File::create(&path);
-        box crash_if_err!(1, in_file) as Box<Writer>
+        let w = crash_if_err!(1, in_file);
+        box w as Box<Writer>
     };
     io::BufferedWriter::new(out_file)
 }