42 lines
832 B
Rust
42 lines
832 B
Rust
|
// run-pass
|
||
|
|
|
||
|
|
use std::cell::RefCell;
|
||
|
|
|
||
|
|
struct S<'a>(i32, &'a RefCell<Vec<i32>>);
|
||
|
|
|
||
|
|
impl<'a> Drop for S<'a> {
|
||
|
|
fn drop(&mut self) {
|
||
|
|
self.1.borrow_mut().push(self.0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
fn test(drops: &RefCell<Vec<i32>>) {
|
||
|
|
let mut foo = None;
|
||
|
|
let pfoo: *mut _ = &mut foo;
|
||
|
|
|
||
|
|
match foo {
|
||
|
|
None => (),
|
||
|
|
_ => return,
|
||
|
|
}
|
||
|
|
|
||
|
|
// Both S(0) and S(1) should be dropped, but aren't.
|
||
|
|
unsafe { *pfoo = Some((S(0, drops), S(1, drops))); }
|
||
|
|
|
||
|
|
match foo {
|
||
|
|
Some((_x, _)) => {}
|
||
|
|
_ => {}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
fn main() {
|
||
|
|
let drops = RefCell::new(Vec::new());
|
||
|
|
test(&drops);
|
||
|
|
|
||
|
|
// Ideally, we want this...
|
||
|
|
//assert_eq!(*drops.borrow(), &[0, 1]);
|
||
|
|
|
||
|
|
// But the delayed access through the raw pointer confuses drop elaboration,
|
||
|
|
// causing S(1) to be leaked.
|
||
|
|
assert_eq!(*drops.borrow(), &[0]);
|
||
|
|
}
|