error[E0505]: cannot move out of `s` because it is borrowed --> $DIR/borrowck-overloaded-index-move-index.rs:50:22 | LL | let mut s = "hello".to_string(); | ----- binding `s` declared here LL | let rs = &mut s; | ------ borrow of `s` occurs here LL | LL | println!("{}", f[s]); | ^ move out of `s` occurs here ... LL | use_mut(rs); | -- borrow later used here error[E0505]: cannot move out of `s` because it is borrowed --> $DIR/borrowck-overloaded-index-move-index.rs:53:7 | LL | let mut s = "hello".to_string(); | ----- binding `s` declared here LL | let rs = &mut s; | ------ borrow of `s` occurs here ... LL | f[s] = 10; | ^ move out of `s` occurs here ... LL | use_mut(rs); | -- borrow later used here error[E0382]: use of moved value: `s` --> $DIR/borrowck-overloaded-index-move-index.rs:53:7 | LL | let mut s = "hello".to_string(); | ----- move occurs because `s` has type `String`, which does not implement the `Copy` trait ... LL | println!("{}", f[s]); | - value moved here ... LL | f[s] = 10; | ^ value used here after move | help: consider cloning the value if the performance cost is acceptable | LL | println!("{}", f[s.clone()]); | ++++++++ error: aborting due to 3 previous errors Some errors have detailed explanations: E0382, E0505. For more information about an error, try `rustc --explain E0382`.