1error[E0597]: `factorial` does not live long enough
2  --> $DIR/unboxed-closures-failed-recursive-fn-1.rs:15:17
3   |
4LL |     let f = |x: u32| -> u32 {
5   |             --------------- value captured here
6LL |         let g = factorial.as_ref().unwrap();
7   |                 ^^^^^^^^^ borrowed value does not live long enough
8...
9LL | }
10   | -
11   | |
12   | `factorial` dropped here while still borrowed
13   | borrow might be used here, when `factorial` is dropped and runs the destructor for type `Option<Box<dyn Fn(u32) -> u32>>`
14
15error[E0506]: cannot assign to `factorial` because it is borrowed
16  --> $DIR/unboxed-closures-failed-recursive-fn-1.rs:20:5
17   |
18LL |     let f = |x: u32| -> u32 {
19   |             --------------- borrow of `factorial` occurs here
20LL |         let g = factorial.as_ref().unwrap();
21   |                 --------- borrow occurs due to use in closure
22...
23LL |     factorial = Some(Box::new(f));
24   |     ^^^^^^^^^
25   |     |
26   |     assignment to borrowed `factorial` occurs here
27   |     borrow later used here
28
29error[E0597]: `factorial` does not live long enough
30  --> $DIR/unboxed-closures-failed-recursive-fn-1.rs:28:17
31   |
32LL |     let mut factorial: Option<Box<dyn Fn(u32) -> u32 + 'static>> = None;
33   |                        ----------------------------------------- type annotation requires that `factorial` is borrowed for `'static`
34LL |
35LL |     let f = |x: u32| -> u32 {
36   |             --------------- value captured here
37LL |         let g = factorial.as_ref().unwrap();
38   |                 ^^^^^^^^^ borrowed value does not live long enough
39...
40LL | }
41   | - `factorial` dropped here while still borrowed
42
43error[E0506]: cannot assign to `factorial` because it is borrowed
44  --> $DIR/unboxed-closures-failed-recursive-fn-1.rs:33:5
45   |
46LL |     let mut factorial: Option<Box<dyn Fn(u32) -> u32 + 'static>> = None;
47   |                        ----------------------------------------- type annotation requires that `factorial` is borrowed for `'static`
48LL |
49LL |     let f = |x: u32| -> u32 {
50   |             --------------- borrow of `factorial` occurs here
51LL |         let g = factorial.as_ref().unwrap();
52   |                 --------- borrow occurs due to use in closure
53...
54LL |     factorial = Some(Box::new(f));
55   |     ^^^^^^^^^ assignment to borrowed `factorial` occurs here
56
57error: aborting due to 4 previous errors
58
59Some errors have detailed explanations: E0506, E0597.
60For more information about an error, try `rustc --explain E0506`.
61