1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
//@ run-pass
#![allow(stable_features)]
#![allow(unused_imports)]
// Test that cleanup scope for temporaries created in a match
// arm is confined to the match arm itself.
#![feature(os)]
use std::os;
struct Test { x: isize }
impl Test {
fn get_x(&self) -> Option<Box<isize>> {
Some(Box::new(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);
}
|
