Goal:
    A : Type  P : list A → A → Type  l : list A  a : All_fold P l
  ============================
   (noConfusionHom_All_fold_obligation_1 A P l a a
      (noConfusionHom_All_fold_obligation_2 A P l a a eq_refl) = eq_refl)


DEBUG:Going to execute:
CoreTactics.on_last_hyp
            ltac:(fun id => CoreTactics.destruct_sigma id; DepElim.depelim id)
Level 4: evaluation returns
destruct id
where
id := e
of type
constr of type tacvalue

Level 2: evaluation returns
idtac of type tacvalue