Goal:
  
  A : Type
  P : list A → A → Type
  d : A
  Γ : list A
  a : All_fold P Γ
  p : P Γ d
  b : All_fold P Γ
  p0 : P Γ d
  ============================
   (∀ (H := CoreTactics.block) (e : NoConfusionHom_All_fold A P 
                                      (d :: Γ) (All_fold_cons P a p)
                                      (All_fold_cons P b p0)),
      let H0 := CoreTactics.block in
      noConfusionHom_All_fold_obligation_2 A P (d :: Γ) 
        (All_fold_cons P a p) (All_fold_cons P b p0)
        (noConfusionHom_All_fold_obligation_1 A P 
           (d :: Γ) (All_fold_cons P a p) (All_fold_cons P b p0) e) = e)


DEBUG:Going to execute:
fail 1

Goals:
    A : Type  P : list A → A → Type
  ============================
   (∀ (H := CoreTactics.block) (e : NoConfusionHom_All_fold A P []
                                      (All_fold_nil P) 
                                      (All_fold_nil P)),
      let H0 := CoreTactics.block in
      noConfusionHom_All_fold_obligation_2 A P [] 
        (All_fold_nil P) (All_fold_nil P)
        (noConfusionHom_All_fold_obligation_1 A P [] 
           (All_fold_nil P) (All_fold_nil P) e) = e)

  
  A : Type
  P : list A → A → Type
  d : A
  Γ : list A
  a : All_fold P Γ
  p : P Γ d
  b : All_fold P Γ
  p0 : P Γ d
  ============================
   (∀ (H := CoreTactics.block) (e : NoConfusionHom_All_fold A P 
                                      (d :: Γ) (All_fold_cons P a p)
                                      (All_fold_cons P b p0)),
      let H0 := CoreTactics.block in
      noConfusionHom_All_fold_obligation_2 A P (d :: Γ) 
        (All_fold_cons P a p) (All_fold_cons P b p0)
        (noConfusionHom_All_fold_obligation_1 A P 
           (d :: Γ) (All_fold_cons P a p) (All_fold_cons P b p0) e) = e)


DEBUG:Going to execute:
DepElim.simplify_IH_hyps
Level 4: Backtrace:

Tactic failure (level 1).
Level 3: Backtrace:

Tactic failure.
Level 2: Backtrace:

Tactic failure.

Goals:
    A : Type  P : list A → A → Type
  ============================
   (∀ (H := CoreTactics.block) (e : NoConfusionHom_All_fold A P []
                                      (All_fold_nil P) 
                                      (All_fold_nil P)),
      let H0 := CoreTactics.block in
      noConfusionHom_All_fold_obligation_2 A P [] 
        (All_fold_nil P) (All_fold_nil P)
        (noConfusionHom_All_fold_obligation_1 A P [] 
           (All_fold_nil P) (All_fold_nil P) e) = e)

  
  A : Type
  P : list A → A → Type
  d : A
  Γ : list A
  a : All_fold P Γ
  p : P Γ d
  b : All_fold P Γ
  p0 : P Γ d
  ============================
   (∀ (H := CoreTactics.block) (e : NoConfusionHom_All_fold A P 
                                      (d :: Γ) (All_fold_cons P a p)
                                      (All_fold_cons P b p0)),
      let H0 := CoreTactics.block in
      noConfusionHom_All_fold_obligation_2 A P (d :: Γ) 
        (All_fold_cons P a p) (All_fold_cons P b p0)
        (noConfusionHom_All_fold_obligation_1 A P 
           (d :: Γ) (All_fold_cons P a p) (All_fold_cons P b p0) e) = e)


DEBUG:Going to execute:
repeat
            match goal with
            | hyp:context [ CoreTactics.block ]
              |- _ =>
                  cbn beta in hyp; eqns_specialize_eqs_block hyp;
                   cbn[eq_rect_r eq_rect] in hyp
            end