error[E0382]: use of moved value: `f`
  --> $DIR/issue-12127.rs:11:9
   |
LL |         f();
   |         --- `f` moved due to this call
LL |         f();
   |         ^ value used here after move
   |
note: this value implements `FnOnce`, which causes it to be moved when called
  --> $DIR/issue-12127.rs:10:9
   |
LL |         f();
   |         ^
   = note: move occurs because `f` has type `{closure@$DIR/issue-12127.rs:8:24: 8:30}`, which does not implement the `Copy` trait

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0382`.