Goal:
    A : Type  P : A → Type  Q : A → Type  l : list A
  ============================
   (All P l → All (λ x : A, P x → Q x) l → All Q l)


DEBUG:Going to execute:
induction 1; inversion 1; constructor
Level 1: evaluation returns
inversion_clear H
where
H := Allx
of type
constr of type tacvalue