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error[E0597]: `factorial` does not live long enough
--> $DIR/unboxed-closures-failed-recursive-fn-1.rs:15:17
|
LL | let f = |x: u32| -> u32 {
| --------------- value captured here
LL | let g = factorial.as_ref().unwrap();
| ^^^^^^^^^ borrowed value does not live long enough
...
LL | }
| -
| |
| `factorial` dropped here while still borrowed
| borrow might be used here, when `factorial` is dropped and runs the destructor for type `Option<Box<dyn Fn(u32) -> u32>>`
error[E0506]: cannot assign to `factorial` because it is borrowed
--> $DIR/unboxed-closures-failed-recursive-fn-1.rs:20:5
|
LL | let f = |x: u32| -> u32 {
| --------------- borrow of `factorial` occurs here
LL | let g = factorial.as_ref().unwrap();
| --------- borrow occurs due to use in closure
...
LL | factorial = Some(Box::new(f));
| ^^^^^^^^^
| |
| assignment to borrowed `factorial` occurs here
| borrow later used here
error[E0597]: `factorial` does not live long enough
--> $DIR/unboxed-closures-failed-recursive-fn-1.rs:28:17
|
LL | let mut factorial: Option<Box<dyn Fn(u32) -> u32 + 'static>> = None;
| ----------------------------------------- type annotation requires that `factorial` is borrowed for `'static`
LL |
LL | let f = |x: u32| -> u32 {
| --------------- value captured here
LL | let g = factorial.as_ref().unwrap();
| ^^^^^^^^^ borrowed value does not live long enough
...
LL | }
| - `factorial` dropped here while still borrowed
error[E0506]: cannot assign to `factorial` because it is borrowed
--> $DIR/unboxed-closures-failed-recursive-fn-1.rs:33:5
|
LL | let mut factorial: Option<Box<dyn Fn(u32) -> u32 + 'static>> = None;
| ----------------------------------------- type annotation requires that `factorial` is borrowed for `'static`
LL |
LL | let f = |x: u32| -> u32 {
| --------------- borrow of `factorial` occurs here
LL | let g = factorial.as_ref().unwrap();
| --------- borrow occurs due to use in closure
...
LL | factorial = Some(Box::new(f));
| ^^^^^^^^^ assignment to borrowed `factorial` occurs here
error: aborting due to 4 previous errors
Some errors have detailed explanations: E0506, E0597.
For more information about an error, try `rustc --explain E0506`.
|
