---

yaml
---
r: 92667
b: refs/heads/auto
c: eb9eade
h: refs/heads/master
i:
  92665: 686ffb7
  92663: 6b00b61
v: v3

Author: pcwalton

[refs]

@@ -13,7 +13,7 @@ refs/heads/try3: 9387340aab40a73e8424c48fd42f0c521a4875c0
 refs/tags/release-0.3.1: 495bae036dfe5ec6ceafd3312b4dca48741e845b
 refs/tags/release-0.4: e828ea2080499553b97dfe33b3f4d472b4562ad7
 refs/tags/release-0.5: 7e3bcfbf21278251ee936ad53e92e9b719702d73
-refs/heads/auto: 2fa456d4f4980eba1d8efa23e7290dcefb4346d4
+refs/heads/auto: eb9eade1dfe98301b68b8970a642034e6aa8bbe3
 refs/heads/servo: af82457af293e2a842ba6b7759b70288da276167
 refs/tags/release-0.6: b4ebcfa1812664df5e142f0134a5faea3918544c
 refs/tags/0.1: b19db808c2793fe2976759b85a355c3ad8c8b336

branches/auto/src/librustc/middle/freevars.rs

@@ -33,8 +33,8 @@ pub type freevar_info = @~[@freevar_entry];
 pub type freevar_map = @mut HashMap<ast::NodeId, freevar_info>;
 
 struct CollectFreevarsVisitor {
-    seen: @mut HashMap<ast::NodeId, ()>,
-    refs: @mut ~[@freevar_entry],
+    seen: HashMap<ast::NodeId, ()>,
+    refs: ~[@freevar_entry],
     def_map: resolve::DefMap,
 }
 
@@ -90,8 +90,8 @@ impl Visitor<int> for CollectFreevarsVisitor {
 // in order to start the search.
 fn collect_freevars(def_map: resolve::DefMap, blk: ast::P<ast::Block>)
     -> freevar_info {
-    let seen = @mut HashMap::new();
-    let refs = @mut ~[];
+    let seen = HashMap::new();
+    let refs = ~[];
 
     let mut v = CollectFreevarsVisitor {
         seen: seen,
@@ -100,7 +100,11 @@ fn collect_freevars(def_map: resolve::DefMap, blk: ast::P<ast::Block>)
     };
 
     v.visit_block(blk, 1);
-    return @(*refs).clone();
+    let CollectFreevarsVisitor {
+        refs,
+        ..
+    } = v;
+    return @refs;
 }
 
 struct AnnotateFreevarsVisitor {