---

yaml
---
r: 40386
b: refs/heads/dist-snap
c: b7c04d1
h: refs/heads/master
v: v3

Author: nikomatsakis

[refs]

@@ -7,7 +7,7 @@ refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/ndm: f3868061cd7988080c30d6d5bf352a5a5fe2460b
 refs/heads/try2: a810c03263670238bccd64cabb12a23a46e3a278
 refs/heads/incoming: e90142e536c150df0d9b4b2f11352152177509b5
-refs/heads/dist-snap: f4a5a76aa4596b3892dced83e3e2bea082e20c48
+refs/heads/dist-snap: b7c04d152b92f137cd452ea45dcb9d2568953c86
 refs/tags/release-0.2: c870d2dffb391e14efb05aa27898f1f6333a9596
 refs/tags/release-0.3: b5f0d0f648d9a6153664837026ba1be43d3e2503
 refs/heads/try3: 9387340aab40a73e8424c48fd42f0c521a4875c0

branches/dist-snap/src/librustc/middle/mem_categorization.rs

@@ -797,7 +797,8 @@ impl &mem_categorization_ctxt {
 
           deref_comp(_) => {
             // fixed-length vectors have no deref
-            comp(expr, base_cmt, base_cmt.ty, mt.mutbl, mt.ty)
+            let m = self.inherited_mutability(base_cmt.mutbl, mt.mutbl);
+            comp(expr, base_cmt, base_cmt.ty, m, mt.ty)
           }
         };
 

branches/dist-snap/src/test/run-pass/mutability-inherits-through-fixed-length-vec.rs

@@ -0,0 +1,16 @@
+fn test1() {
+    let mut ints = [0, ..32];
+    ints[0] += 1;
+    assert ints[0] == 1;
+}
+
+fn test2() {
+    let mut ints = [0, ..32];
+    for vec::each_mut(ints) |i| { *i += 22; }
+    for ints.each |i| { assert *i == 22; }
+}
+
+fn main() {
+    test1();
+    test2();
+}