error[E0713]: borrow may still be in use when destructor runs --> $DIR/issue-31567.rs:10:26 | LL | fn get_dangling<'a>(v: VecWrapper<'a>) -> &'a u32 { | -- lifetime `'a` defined here LL | let s_inner: &'a S = &*v.0; | ----- ^^^^^ | | | type annotation requires that `*v.0` is borrowed for `'a` LL | &s_inner.0 LL | } | - here, drop of `v` needs exclusive access to `*v.0`, because the type `VecWrapper<'_>` implements the `Drop` trait error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0713`.