mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-01 06:51:58 +00:00
26 lines
641 B
Rust
26 lines
641 B
Rust
// Regression test for #31567: cached results of projections were
|
|
// causing region relations not to be enforced at all the places where
|
|
// they have to be enforced.
|
|
|
|
struct VecWrapper<'a>(&'a mut S);
|
|
|
|
struct S(Box<u32>);
|
|
|
|
fn get_dangling<'a>(v: VecWrapper<'a>) -> &'a u32 {
|
|
let s_inner: &'a S = &*v.0; //~ ERROR borrow may still be in use when destructor runs [E0713]
|
|
&s_inner.0
|
|
}
|
|
|
|
impl<'a> Drop for VecWrapper<'a> {
|
|
fn drop(&mut self) {
|
|
*self.0 = S(Box::new(0));
|
|
}
|
|
}
|
|
|
|
fn main() {
|
|
let mut s = S(Box::new(11));
|
|
let vw = VecWrapper(&mut s);
|
|
let dangling = get_dangling(vw);
|
|
println!("{}", dangling);
|
|
}
|