Test case

src/test/run-pass/issue-4542.rs

@@ -0,0 +1,27 @@
+// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+fn main() {
+    let a = &~1;
+    let mut c: ~int;
+    match copy *a {
+        b => c = b
+    };
+    log(error, *c);
+    log(error, *a);
+
+/*
+    for os::args().each |arg| {
+        match copy *arg {
+            s => { }
+        }
+    }
+*/
+}