mirror of
https://github.com/rust-lang/rust.git
synced 2024-12-05 13:13:40 +00:00
37 lines
871 B
Rust
37 lines
871 B
Rust
// check that panics in destructors during assignment do not leave
|
|
// destroyed values lying around for other destructors to observe.
|
|
|
|
// run-fail
|
|
// error-pattern:panicking destructors ftw!
|
|
// ignore-emscripten no processes
|
|
|
|
struct Observer<'a>(&'a mut FilledOnDrop);
|
|
|
|
struct FilledOnDrop(u32);
|
|
impl Drop for FilledOnDrop {
|
|
fn drop(&mut self) {
|
|
if self.0 == 0 {
|
|
// this is only set during the destructor - safe
|
|
// code should not be able to observe this.
|
|
self.0 = 0x1c1c1c1c;
|
|
panic!("panicking destructors ftw!");
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<'a> Drop for Observer<'a> {
|
|
fn drop(&mut self) {
|
|
assert_eq!(self.0 .0, 1);
|
|
}
|
|
}
|
|
|
|
fn foo(b: &mut Observer) {
|
|
*b.0 = FilledOnDrop(1);
|
|
}
|
|
|
|
fn main() {
|
|
let mut bomb = FilledOnDrop(0);
|
|
let mut observer = Observer(&mut bomb);
|
|
foo(&mut observer);
|
|
}
|