| // Copyright 2012-2016 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. |
| |
| // Regression test for Issue #30530: alloca's created for storing |
| // intermediate scratch values during brace-less match arms need to be |
| // initialized with their drop-flag set to "dropped" (or else we end |
| // up running the destructors on garbage data at the end of the |
| // function). |
| |
| pub enum Handler { |
| Default, |
| #[allow(dead_code)] |
| Custom(*mut Box<Fn()>), |
| } |
| |
| fn main() { |
| take(Handler::Default, Box::new(main)); |
| } |
| |
| #[inline(never)] |
| pub fn take(h: Handler, f: Box<Fn()>) -> Box<Fn()> { |
| unsafe { |
| match h { |
| Handler::Custom(ptr) => *Box::from_raw(ptr), |
| Handler::Default => f, |
| } |
| } |
| } |