Add tests of move-into-dead-array restriction.

Author: pnkfelix

src/test/compile-fail/move-into-dead-array-1.rs

@@ -0,0 +1,25 @@
+// Copyright 2015 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.
+
+// Ensure that we cannot move into an uninitialized fixed-size array.
+
+struct D { _x: u8 }
+
+fn d() -> D { D { _x: 0 } }
+
+fn main() {
+    foo(1);
+    foo(3);
+}
+
+fn foo(i: usize) {
+    let mut a: [D; 4];
+    a[i] = d();        //~ ERROR use of possibly uninitialized variable: `a`
+}

src/test/compile-fail/move-into-dead-array-2.rs

@@ -0,0 +1,25 @@
+// Copyright 2015 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.
+
+// Ensure that we cannot move into an uninitialized fixed-size array.
+
+struct D { _x: u8 }
+
+fn d() -> D { D { _x: 0 } }
+
+fn main() {
+    foo([d(), d(), d(), d()], 1);
+    foo([d(), d(), d(), d()], 3);
+}
+
+fn foo(mut a: [D; 4], i: usize) {
+    drop(a);
+    a[i] = d(); //~ ERROR use of moved value: `a`
+}