rustc: Check for null before dropping ~objects. #5192

src/test/run-pass/unique-object-move.rs

@@ -0,0 +1,24 @@
+// Copyright 2012 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.
+
+// Issue #5192
+
+pub trait EventLoop { }
+
+pub struct UvEventLoop {
+    uvio: int
+}
+
+impl EventLoop for UvEventLoop { }
+
+pub fn main() {
+    let loop_: ~EventLoop = ~UvEventLoop { uvio: 0 } as ~EventLoop;
+    let loop2_ = loop_;
+}