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 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`.