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// 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);
}
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