src/test/ui/borrowck/borrowck-unboxed-closures.stderr

   1 error[E0502]: cannot borrow `f` as immutable because it is also borrowed as mutable
   2   --> $DIR/borrowck-unboxed-closures.rs:3:5
   3    |
   4 LL |     let g = &mut f;
   5    |             ------ mutable borrow occurs here
   6 LL |     f(1, 2);
   7    |     ^ immutable borrow occurs here
   8 LL |     use_mut(g);
   9    |             - mutable borrow later used here
  10
  11 error[E0596]: cannot borrow `f` as mutable, as it is not declared as mutable
  12   --> $DIR/borrowck-unboxed-closures.rs:7:5
  13    |
  14 LL | fn b<F:FnMut(isize, isize) -> isize>(f: F) {
  15    |                                      - help: consider changing this to be mutable: `mut f`
  16 LL |     f(1, 2);
  17    |     ^ cannot borrow as mutable
  18
  19 error[E0382]: use of moved value: `f`
  20   --> $DIR/borrowck-unboxed-closures.rs:12:5
  21    |
  22 LL | fn c<F:FnOnce(isize, isize) -> isize>(f: F) {
  23    |                                       - move occurs because `f` has type `F`, which does not implement the `Copy` trait
  24 LL |     f(1, 2);
  25    |     ------- `f` moved due to this call
  26 LL |     f(1, 2);
  27    |     ^ value used here after move
  28    |
  29 note: this value implements `FnOnce`, which causes it to be moved when called
  30   --> $DIR/borrowck-unboxed-closures.rs:11:5
  31    |
  32 LL |     f(1, 2);
  33    |     ^
  34 help: consider further restricting this bound
  35    |
  36 LL | fn c<F:FnOnce(isize, isize) -> isize + Copy>(f: F) {
  37    |                                      ++++++
  38
  39 error: aborting due to 3 previous errors
  40
  41 Some errors have detailed explanations: E0382, E0502, E0596.
  42 For more information about an error, try `rustc --explain E0382`.