error[E0597]: `v` does not live long enough
  --> tests/ui/test_client_cannot_outlive_handler.rs:7:19
   |
4  |     let mut client = {
   |         ---------- borrow later stored here
5  |         let v = vec![1, 2, 3];
   |             - binding `v` declared here
6  |         let handler = |_: &mut Client<'_>, _| {
   |                       ----------------------- value captured here
7  |             dbg!(&v);
   |                   ^ borrowed value does not live long enough
...
13 |     };
   |     - `v` dropped here while still borrowed