error: lifetime may not live long enough
  --> $DIR/issue-10291.rs:3:9
   |
LL | fn test<'x>(x: &'x isize) {
   |         -- lifetime `'x` defined here
LL |     drop::<Box<dyn for<'z> FnMut(&'z isize) -> &'z isize>>(Box::new(|z| {
LL |         x
   |         ^ returning this value requires that `'x` must outlive `'static`
   |
   = help: consider replacing `'x` with `'static`

error: aborting due to previous error