mirror of
https://github.com/rust-lang/rust
synced 2024-11-05 20:45:15 +00:00
26 lines
602 B
Rust
26 lines
602 B
Rust
// run-pass
|
|
|
|
// Check that when a `let`-binding occurs in a loop, its associated
|
|
// drop-flag is reinitialized (to indicate "needs-drop" at the end of
|
|
// the owning variable's scope).
|
|
|
|
struct A<'a>(&'a mut i32);
|
|
|
|
impl<'a> Drop for A<'a> {
|
|
fn drop(&mut self) {
|
|
*self.0 += 1;
|
|
}
|
|
}
|
|
|
|
fn main() {
|
|
let mut cnt = 0;
|
|
for i in 0..2 {
|
|
let a = A(&mut cnt);
|
|
if i == 1 { // Note that
|
|
break; // both this break
|
|
} // and also
|
|
drop(a); // this move of `a`
|
|
// are necessary to expose the bug
|
|
}
|
|
assert_eq!(cnt, 2);
|
|
}
|