---

yaml
---
r: 13106
b: refs/heads/master
c: 6dc4bc5
h: refs/heads/master
v: v3

Author: nikomatsakis

[refs]

@@ -1,5 +1,5 @@
 ---
-refs/heads/master: 862976c267b3cc7a03efe5b7936b9025227447a4
+refs/heads/master: 6dc4bc517ad0283aa28c72a3f15d3b5611882987
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
 refs/heads/snap-stage3: 4a81779abd786ff22d71434c6d9a5917ea4cdfff
 refs/heads/try: 2898dcc5d97da9427ac367542382b6239d9c0bbf

trunk/src/test/run-pass/borrowck-preserve-box-sometimes-needed.rs

@@ -0,0 +1,16 @@
+// xfail-fast   (compile-flags unsupported on windows)
+// compile-flags:--borrowck=err
+// exec-env:RUST_POISON_ON_FREE=1
+
+fn switcher(x: option<@int>) {
+    let mut x = x;
+    alt x {
+      some(@y) { copy y; x = none; }
+      none { }
+    }
+}
+
+fn main() {
+    switcher(none);
+    switcher(some(@3));
+}