error[E0499]: cannot borrow `scope1` as mutable more than once at a time --> $DIR/handle_scope_lifetime_3.rs:8:22 | 7 | let mut _scope2 = v8::EscapableHandleScope::new(&mut scope1); | ----------- first mutable borrow occurs here 8 | v8::Integer::new(&mut scope1, 123) | ^^^^^^^^^^^ second mutable borrow occurs here 9 | }; | - first borrow might be used here, when `_scope2` is dropped and runs the `Drop` code for type `EscapableHandleScope`