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`.