error[E0502]: cannot borrow `s` as immutable because it is also borrowed as mutable
  --> $DIR/borrowck-overloaded-call.rs:59:5
   |
LL |     let sp = &mut s;
   |              ------ mutable borrow occurs here
LL |     s(3);
   |     ^ immutable borrow occurs here
LL |     use_mut(sp);
   |             -- mutable borrow later used here

error[E0596]: cannot borrow `s` as mutable, as it is not declared as mutable
  --> $DIR/borrowck-overloaded-call.rs:67:5
   |
LL |     s(3);
   |     ^ cannot borrow as mutable
   |
help: consider changing this to be mutable
   |
LL |     let mut s = SFnMut {
   |         +++

error[E0382]: use of moved value: `s`
  --> $DIR/borrowck-overloaded-call.rs:75:5
   |
LL |     let s = SFnOnce {
   |         - move occurs because `s` has type `SFnOnce`, which does not implement the `Copy` trait
...
LL |     s(" world".to_string());
   |     - value moved here
LL |     s(" world".to_string());
   |     ^ value used here after move
   |
note: if `SFnOnce` implemented `Clone`, you could clone the value
  --> $DIR/borrowck-overloaded-call.rs:41:1
   |
LL | struct SFnOnce {
   | ^^^^^^^^^^^^^^ consider implementing `Clone` for this type
...
LL |     s(" world".to_string());
   |     - you could clone this value

error: aborting due to 3 previous errors

Some errors have detailed explanations: E0382, E0502, E0596.
For more information about an error, try `rustc --explain E0382`.