Add some positive tests for dtor struct destructuring

Author: huonw

src/test/run-pass/issue-6344-let.rs

@@ -0,0 +1,22 @@
+// xfail-test #3874
+// 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.
+struct A { x: uint }
+
+impl Drop for A {
+    fn finalize(&self) {}
+}
+
+fn main() {
+    let a = A { x: 0 };
+
+    let A { x: ref x } = a;
+    debug!("%?", x)
+}

src/test/run-pass/issue-6344-match.rs

@@ -0,0 +1,24 @@
+// 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.
+struct A { x: uint }
+
+impl Drop for A {
+    fn finalize(&self) {}
+}
+
+fn main() {
+    let a = A { x: 0 };
+
+    match a {
+        A { x : ref x } => {
+            debug!("%?", x)
+        }
+    }
+}