error[E0596]: cannot borrow data in an index of `HashMap<&str, String>` as mutable
  --> $DIR/index-mut-help.rs:11:5
   |
LL |     map["peter"].clear();
   |     ^^^^^^^^^^^^^^^^^^^^ cannot borrow as mutable
   |
   = help: trait `IndexMut` is required to modify indexed content, but it is not implemented for `HashMap<&str, String>`

error[E0594]: cannot assign to data in an index of `HashMap<&str, String>`
  --> $DIR/index-mut-help.rs:12:5
   |
LL |     map["peter"] = "0".to_string();
   |     ^^^^^^^^^^^^ cannot assign
   |
   = help: trait `IndexMut` is required to modify indexed content, but it is not implemented for `HashMap<&str, String>`

error[E0596]: cannot borrow data in an index of `HashMap<&str, String>` as mutable
  --> $DIR/index-mut-help.rs:13:13
   |
LL |     let _ = &mut map["peter"];
   |             ^^^^^^^^^^^^^^^^^ cannot borrow as mutable
   |
   = help: trait `IndexMut` is required to modify indexed content, but it is not implemented for `HashMap<&str, String>`

error: aborting due to 3 previous errors

Some errors have detailed explanations: E0594, E0596.
For more information about an error, try `rustc --explain E0594`.