Add regression test for issue #18412

Author: bkoropoff

src/test/run-pass/issue-18412.rs

@@ -0,0 +1,36 @@
+// Copyright 2014 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.
+
+#![feature(tuple_indexing)]
+
+// Test that non-static methods can be assigned to local variables as
+// function pointers.
+
+trait Foo {
+    fn foo(&self) -> uint;
+}
+
+struct A(uint);
+
+impl A {
+    fn bar(&self) -> uint { self.0 }
+}
+
+impl Foo for A {
+    fn foo(&self) -> uint { self.bar() }
+}
+
+fn main() {
+    let f = A::bar;
+    let g = Foo::foo;
+    let a = A(42);
+
+    assert_eq!(f(&a), g(&a));
+}