From ef01ae7fe0652c050ec9af8f70990bb01309ffbc Mon Sep 17 00:00:00 2001
From: Guillaume Gomez <guillaume1.gomez@gmail.com>
Date: Sat, 1 Apr 2017 00:31:37 -0600
Subject: [PATCH] Force footnote references to be sorted by id

---
 src/librustdoc/html/markdown.rs | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/librustdoc/html/markdown.rs b/src/librustdoc/html/markdown.rs
index d1f2948bc25..0b098fb14f1 100644
--- a/src/librustdoc/html/markdown.rs
+++ b/src/librustdoc/html/markdown.rs
@@ -585,11 +585,13 @@ pub fn render(w: &mut fmt::Formatter,
         }
     }
     if !parser.footnotes.is_empty() {
+        let mut v: Vec<_> = parser.footnotes.values().collect();
+        v.sort_by(|a, b| a.1.cmp(&b.1));
         buffer.push_str(&format!("<div class=\"footnotes\"><hr><ol>{}</ol></div>",
-                                 parser.footnotes.values()
-                                                 .map(|&(ref s, _)| s.as_str())
-                                                 .collect::<Vec<_>>()
-                                                 .join("")));
+                                 v.iter()
+                                  .map(|s| s.0.as_str())
+                                  .collect::<Vec<_>>()
+                                  .join("")));
     }
     let mut ret = toc_builder.map_or(Ok(()), |builder| {
         write!(w, "<nav id=\"TOC\">{}</nav>", builder.into_toc())