src/main.rs:22:31: 22:35 error: cannot borrow `*self` as mutable more than once at a time
src/main.rs:22         while let Some(msg) = self.next_packet() {
                                             ^~~~
src/main.rs:22:31: 22:35 note: previous borrow of `*self` occurs here; the mutable borrow prevents subsequent moves, borrows, or modification of `*self` until the borrow ends
src/main.rs:22         while let Some(msg) = self.next_packet() {
                                             ^~~~