// 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 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. pub struct T; #[unsafe_no_drop_flag] //~^ ERROR unsafe_no_drop_flag has unstable semantics and may be removed pub struct S { pub x: T, } impl Drop for S { fn drop(&mut self) {} } pub fn main() {}