error[E0502]: cannot borrow `my_stuff` as mutable because it is also borrowed as immutable --> $DIR/hashmap-iter-value-lifetime.rs:7:5 | LL | let (_, thing) = my_stuff.iter().next().unwrap(); | -------- immutable borrow occurs here LL | LL | my_stuff.clear(); | ^^^^^^^^ mutable borrow occurs here LL | LL | println!("{}", *thing); | ------ immutable borrow later used here error: aborting due to previous error For more information about this error, try `rustc --explain E0502`.