error: unsatisfied lifetime constraints
  --> $DIR/issue-40510-3.rs:18:9
   |
LL |         || {
   |    _____-
   |   |_____|
   |  ||
LL |  ||         || {
   |  ||_________^
LL | |||             x.push(())
LL | |||         }
   | |||_________^ requires that `'1` must outlive `'2`
LL |  ||     };
   |  ||     -
   |  ||_____|
   |  |______lifetime `'1` represents the closure body
   |         lifetime `'2` appears in return type

error: aborting due to previous error