Rust errors

gistfile1.txt

error: cannot borrow immutable local variable `deck` as mutable
  --> src/main.rs:45:17
   |
44 |     let deck = Deck::new();
   |         ---- use `mut deck` here to make mutable
45 |     let card1 = deck.take().unwrap();
   |                 ^^^^ cannot borrow mutably

error: cannot borrow immutable local variable `deck` as mutable
  --> src/main.rs:46:17
   |
44 |     let deck = Deck::new();
   |         ---- use `mut deck` here to make mutable
45 |     let card1 = deck.take().unwrap();
46 |     let card2 = deck.take().unwrap();
   |                 ^^^^ cannot borrow mutably

error: cannot borrow immutable local variable `deck` as mutable
  --> src/main.rs:47:5
   |
44 |     let deck = Deck::new();
   |         ---- use `mut deck` here to make mutable
...
47 |     deck.shuffle();
   |     ^^^^ cannot borrow mutably

error: aborting due to 3 previous errors

error: Could not compile `deck`.