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// 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.
// Test that cleanup scope for temporaries created in a match
// arm is confined to the match arm itself.
// pretty-expanded FIXME #23616
#![allow(unknown_features)]
#![feature(box_syntax, os)]
use std::os;
struct Test { x: isize }
impl Test {
fn get_x(&self) -> Option<Box<isize>> {
Some(box self.x)
}
}
fn do_something(t: &Test) -> isize {
// The cleanup scope for the result of `t.get_x()` should be the
// arm itself and not the match, otherwise we'll (potentially) get
// a crash trying to free an uninitialized stack slot.
match t {
&Test { x: 2 } if t.get_x().is_some() => {
t.x * 2
}
_ => { 22 }
}
}
pub fn main() {
let t = Test { x: 1 };
do_something(&t);
}
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