Rollup merge of #24321 - lstat:16602-needstest, r=pnkfelix

Closes #16602

Author: Manishearth

src/test/run-pass/issue-16602-1.rs

@@ -0,0 +1,15 @@
+// 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.
+
+fn main() {
+    let mut t = [1; 2];
+    t = [t[1] * 2, t[0] * 2];
+    assert_eq!(&t[..], &[2, 2]);
+}

src/test/run-pass/issue-16602-2.rs

@@ -0,0 +1,21 @@
+// 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.
+
+struct A {
+    pub x: u32,
+    pub y: u32,
+}
+
+fn main() {
+    let mut a = A { x: 1, y: 1 };
+    a = A { x: a.y * 2, y: a.x * 2 };
+    assert_eq!(a.x, 2);
+    assert_eq!(a.y, 2);
+}

src/test/run-pass/issue-16602-3.rs

@@ -0,0 +1,34 @@
+// 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.
+
+#[derive(Debug)]
+enum Foo {
+    Bar(u32, u32),
+    Baz(&'static u32, &'static u32)
+}
+
+static NUM: u32 = 100;
+
+fn main () {
+    let mut b = Foo::Baz(&NUM, &NUM);
+    b = Foo::Bar(f(&b), g(&b));
+}
+
+static FNUM: u32 = 1;
+
+fn f (b: &Foo) -> u32 {
+    FNUM
+}
+
+static GNUM: u32 = 2;
+
+fn g (b: &Foo) -> u32 {
+    GNUM
+}