1 error: unsatisfied lifetime constraints
2 --> $DIR/issue-40510-3.rs:18:9
7 | |return type of closure is [closure@$DIR/issue-40510-3.rs:18:9: 20:10 x:&'2 mut std::vec::Vec<()>]
8 | lifetime `'1` represents this closure's body
12 | |_________^ returning this value requires that `'1` must outlive `'2`
14 = note: closure implements `FnMut`, so references to captured variables can't escape the closure
16 error: aborting due to previous error