funind_errors.lean:4:7-4:26: error: unknown identifier 'doesNotExist.induct'
funind_errors.lean:22:7-22:23: error: invalid field notation, type is not of the form (C ...) where C is a constant
  takeWhile
has type
  (?m → Bool) → Array ?m → Array ?m
takeWhile.foo.induct.{u_1} {α : Type u_1} (p : α → Bool) (as : Array α) (motive : Nat → Array α → Prop)
  (case1 :
    ∀ (i : Nat) (r : Array α) (h : i < as.size),
      let a := as.get i h;
      p a = true → motive (i + 1) (r.push a) → motive i r)
  (case2 :
    ∀ (i : Nat) (r : Array α) (h : i < as.size),
      let a := as.get i h;
      ¬p a = true → motive i r)
  (case3 : ∀ (i : Nat) (r : Array α), ¬i < as.size → motive i r) (i : Nat) (r : Array α) : motive i r
funind_errors.lean:38:7-38:20: error: invalid field notation, type is not of the form (C ...) where C is a constant
  idEven
has type
  Even ?m → Even ?m
funind_errors.lean:45:7-45:19: error: invalid field notation, type is not of the form (C ...) where C is a constant
  idAcc
has type
  Acc ?m ?m → Acc ?m ?m