44 lines
1.1 KiB
Rust
44 lines
1.1 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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use std::{os, run};
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use std::io::process;
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struct Test { x: int }
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impl Test {
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fn get_x(&self) -> Option<~int> {
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Some(~self.x)
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}
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}
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fn do_something(t: &Test) -> int {
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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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