21 lines
650 B
Rust
21 lines
650 B
Rust
#![feature(coroutines, coroutine_trait)]
|
|
|
|
use std::cell::RefCell;
|
|
use std::ops::Coroutine;
|
|
use std::pin::Pin;
|
|
|
|
fn main() {
|
|
let (mut gen, cell);
|
|
cell = Box::new(RefCell::new(0));
|
|
let ref_ = Box::leak(Box::new(Some(cell.borrow_mut())));
|
|
//~^ ERROR `*cell` does not live long enough [E0597]
|
|
// the upvar is the non-dropck `&mut Option<Ref<'a, i32>>`.
|
|
gen = || {
|
|
// but the coroutine can use it to drop a `Ref<'a, i32>`.
|
|
let _d = ref_.take(); //~ ERROR `ref_` does not live long enough
|
|
yield;
|
|
};
|
|
Pin::new(&mut gen).resume(());
|
|
// drops the RefCell and then the Ref, leading to use-after-free
|
|
}
|