blob: 38b757fac29a81511833b5b7af0e10d36c06e6da (
plain)
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
39
40
41
42
43
44
45
|
// run-pass
// Regression test for incorrect DropAndReplace behavior introduced in #60840
// and fixed in #61373. When combined with the optimization implemented in
// #60187, this produced incorrect code for coroutines when a saved local was
// re-assigned.
#![feature(coroutines, coroutine_trait)]
use std::ops::{Coroutine, CoroutineState};
use std::pin::Pin;
#[derive(Debug, PartialEq)]
struct Foo(i32);
impl Drop for Foo {
fn drop(&mut self) {}
}
fn main() {
let mut a = || {
let mut x = Foo(4);
yield;
assert_eq!(x.0, 4);
// At one point this tricked our dataflow analysis into thinking `x` was
// StorageDead after the assignment.
x = Foo(5);
assert_eq!(x.0, 5);
{
let y = Foo(6);
yield;
assert_eq!(y.0, 6);
}
assert_eq!(x.0, 5);
};
loop {
match Pin::new(&mut a).resume(()) {
CoroutineState::Complete(()) => break,
_ => (),
}
}
}
|
