1 error[E0499]: cannot borrow `f` as mutable more than once at a time
2 --> $DIR/borrowck-call-is-borrow-issue-12224.rs:12:16
5 | - ^^ second mutable borrow occurs here
7 | first mutable borrow occurs here
8 | first borrow later used by call
10 LL | f((Box::new(|| {})))
11 | - second borrow occurs due to use of `f` in closure
13 error[E0596]: cannot borrow `*f` as mutable, as it is behind a `&` reference
14 --> $DIR/borrowck-call-is-borrow-issue-12224.rs:25:5
16 LL | fn test2<F>(f: &F) where F: FnMut() {
17 | -- help: consider changing this to be a mutable reference: `&mut F`
19 | ^^^^ `f` is a `&` reference, so the data it refers to cannot be borrowed as mutable
21 error[E0596]: cannot borrow `f.f` as mutable, as it is behind a `&` reference
22 --> $DIR/borrowck-call-is-borrow-issue-12224.rs:34:5
24 LL | fn test4(f: &Test) {
25 | ----- help: consider changing this to be a mutable reference: `&mut Test<'_>`
27 | ^^^^^^^^^^^^^^^^ `f` is a `&` reference, so the data it refers to cannot be borrowed as mutable
29 error[E0507]: cannot move out of `f`, a captured variable in an `FnMut` closure
30 --> $DIR/borrowck-call-is-borrow-issue-12224.rs:57:13
32 LL | let mut f = move |g: Box<dyn FnMut(isize)>, b: isize| {
33 | ----- captured outer variable
39 | | ^ move occurs because `f` has type `[closure@$DIR/borrowck-call-is-borrow-issue-12224.rs:52:17: 54:6]`, which does not implement the `Copy` trait
42 | |_____- captured by this `FnMut` closure
44 error[E0505]: cannot move out of `f` because it is borrowed
45 --> $DIR/borrowck-call-is-borrow-issue-12224.rs:55:16
48 | - ^^^ move out of `f` occurs here
50 | borrow of `f` occurs here
53 | - move occurs due to use in closure
55 error: aborting due to 5 previous errors
57 Some errors have detailed explanations: E0499, E0505, E0507, E0596.
58 For more information about an error, try `rustc --explain E0499`.