case inl hzero =>
  simp only [hzero, decide_eq_false, Bool.false_and]
  calc
    UInt.getBit (α:=α) 1 i
      = UInt.getBit (α:=α) 0 i := by rw [UInt.eq_of_length_eq_zero hzero 1 0]
    _ = false := UInt.getBit_zero i
α : Type
inst✝¹ : (n : Nat) → OfNat α n
inst✝ : UInt α
i : Nat
hzero : length α = 0
⊢ UInt.getBit 1 i = (decide (0 < length α) && decide (i = 0))
no goals