From 146c462e1af804c56542f2e33e6769d388d04f04 Mon Sep 17 00:00:00 2001
From: Eduard-Mihai Burtescu <edy.burt@gmail.com>
Date: Tue, 28 Feb 2017 20:12:26 +0200
Subject: [PATCH] rustbuild: use a BTreeMap for the ruleset for determinism.

---
 src/bootstrap/step.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/bootstrap/step.rs b/src/bootstrap/step.rs
index dcd3407e174..01431c50ed7 100644
--- a/src/bootstrap/step.rs
+++ b/src/bootstrap/step.rs
@@ -26,7 +26,7 @@
 //! along with the actual implementation elsewhere. You can find more comments
 //! about how to define rules themselves below.
 
-use std::collections::{HashMap, HashSet};
+use std::collections::{BTreeMap, HashSet};
 use std::mem;
 
 use check::{self, TestKind};
@@ -866,7 +866,7 @@ impl<'a, 'b> Drop for RuleBuilder<'a, 'b> {
 pub struct Rules<'a> {
     build: &'a Build,
     sbuild: Step<'a>,
-    rules: HashMap<&'a str, Rule<'a>>,
+    rules: BTreeMap<&'a str, Rule<'a>>,
 }
 
 impl<'a> Rules<'a> {
@@ -879,7 +879,7 @@ impl<'a> Rules<'a> {
                 host: &build.config.build,
                 name: "",
             },
-            rules: HashMap::new(),
+            rules: BTreeMap::new(),
         }
     }