From 19aae8e06990af5821c450594a340d90a746fa1b Mon Sep 17 00:00:00 2001
From: Corey Farwell <coreyf@rwell.org>
Date: Tue, 23 Aug 2016 21:34:53 -0400
Subject: [PATCH] Reuse iterator to avoid unnecessary creation.

---
 src/librustc_metadata/decoder.rs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/librustc_metadata/decoder.rs b/src/librustc_metadata/decoder.rs
index ca7f81db6923e..b0335258b4041 100644
--- a/src/librustc_metadata/decoder.rs
+++ b/src/librustc_metadata/decoder.rs
@@ -1449,8 +1449,9 @@ pub fn get_dylib_dependency_formats(cdata: Cmd)
     debug!("found dylib deps: {}", formats.as_str());
     for spec in formats.as_str().split(',') {
         if spec.is_empty() { continue }
-        let cnum = spec.split(':').nth(0).unwrap();
-        let link = spec.split(':').nth(1).unwrap();
+        let mut split = spec.split(':');
+        let cnum = split.next().unwrap();
+        let link = split.next().unwrap();
         let cnum: ast::CrateNum = cnum.parse().unwrap();
         let cnum = cdata.cnum_map.borrow()[cnum];
         result.push((cnum, if link == "d" {