1 error[E0502]: cannot borrow `f` as immutable because it is also borrowed as mutable
2 --> $DIR/borrowck-unboxed-closures.rs:3:5
5 | ------ mutable borrow occurs here
7 | ^ immutable borrow occurs here
9 | - mutable borrow later used here
11 error[E0596]: cannot borrow `f` as mutable, as it is not declared as mutable
12 --> $DIR/borrowck-unboxed-closures.rs:7:5
15 | ^ cannot borrow as mutable
17 help: consider changing this to be mutable
19 LL | fn b<F:FnMut(isize, isize) -> isize>(mut f: F) {
22 error[E0382]: use of moved value: `f`
23 --> $DIR/borrowck-unboxed-closures.rs:12:5
25 LL | fn c<F:FnOnce(isize, isize) -> isize>(f: F) {
26 | - move occurs because `f` has type `F`, which does not implement the `Copy` trait
28 | ------- `f` moved due to this call
30 | ^ value used here after move
32 note: this value implements `FnOnce`, which causes it to be moved when called
33 --> $DIR/borrowck-unboxed-closures.rs:11:5
37 help: consider further restricting this bound
39 LL | fn c<F:FnOnce(isize, isize) -> isize + Copy>(f: F) {
42 error: aborting due to 3 previous errors
44 Some errors have detailed explanations: E0382, E0502, E0596.
45 For more information about an error, try `rustc --explain E0382`.