47 lines
1.2 KiB
Rust
47 lines
1.2 KiB
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// Test that cleanup scope for temporaries created in a match
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// arm is confined to the match arm itself.
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// pretty-expanded FIXME #23616
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#![allow(unknown_features)]
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#![feature(box_syntax, os)]
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use std::os;
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struct Test { x: isize }
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impl Test {
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fn get_x(&self) -> Option<Box<isize>> {
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Some(box self.x)
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}
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}
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fn do_something(t: &Test) -> isize {
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// The cleanup scope for the result of `t.get_x()` should be the
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// arm itself and not the match, otherwise we'll (potentially) get
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// a crash trying to free an uninitialized stack slot.
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match t {
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&Test { x: 2 } if t.get_x().is_some() => {
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t.x * 2
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}
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_ => { 22 }
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}
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}
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pub fn main() {
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let t = Test { x: 1 };
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do_something(&t);
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}
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