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error[E0499]: cannot borrow `f` as mutable more than once at a time
--> $DIR/borrowck-call-is-borrow-issue-12224.rs:12:16
|
LL | f(Box::new(|| {
| - ^^ second mutable borrow occurs here
| |
| first mutable borrow occurs here
| first borrow later used by call
LL |
LL | f((Box::new(|| {})))
| - second borrow occurs due to use of `f` in closure
error[E0596]: cannot borrow `*f` as mutable, as it is behind a `&` reference
--> $DIR/borrowck-call-is-borrow-issue-12224.rs:25:5
|
LL | (*f)();
| ^^^^ `f` is a `&` reference, so the data it refers to cannot be borrowed as mutable
|
help: consider changing this to be a mutable reference
|
LL | fn test2<F>(f: &mut F) where F: FnMut() {
| +++
error[E0596]: cannot borrow `f.f` as mutable, as it is behind a `&` reference
--> $DIR/borrowck-call-is-borrow-issue-12224.rs:34:5
|
LL | f.f.call_mut(())
| ^^^ `f` is a `&` reference, so the data it refers to cannot be borrowed as mutable
|
help: consider changing this to be a mutable reference
|
LL | fn test4(f: &mut Test) {
| +++
error[E0507]: cannot move out of `f`, a captured variable in an `FnMut` closure
--> $DIR/borrowck-call-is-borrow-issue-12224.rs:57:13
|
LL | let mut f = move |g: Box<dyn FnMut(isize)>, b: isize| {
| ----- captured outer variable
...
LL | f(Box::new(|a| {
| --- captured by this `FnMut` closure
LL |
LL | foo(f);
| ^ move occurs because `f` has type `[closure@$DIR/borrowck-call-is-borrow-issue-12224.rs:52:17: 52:58]`, which does not implement the `Copy` trait
error[E0505]: cannot move out of `f` because it is borrowed
--> $DIR/borrowck-call-is-borrow-issue-12224.rs:55:16
|
LL | let mut f = move |g: Box<dyn FnMut(isize)>, b: isize| {
| ----- binding `f` declared here
...
LL | f(Box::new(|a| {
| - ^^^ move out of `f` occurs here
| |
| borrow of `f` occurs here
LL |
LL | foo(f);
| - move occurs due to use in closure
error: aborting due to 5 previous errors
Some errors have detailed explanations: E0499, E0505, E0507, E0596.
For more information about an error, try `rustc --explain E0499`.
|
