Goal:
  
  A : Type
  P : list A → A → Type
  Q : list A → list A → A → A → Type
  d0 : A
  Γ1 : list A
  d : A
  Γ0 : list A
  X : All_fold P Γ0
  p : P Γ0 d
  IHX : ∀ Γ : list A,
          All2_fold Q Γ Γ0
          → All2_fold (λ (Γ0 Γ' : list A) (d d' : A), P Γ' d' × Q Γ0 Γ' d d')
              Γ Γ0
  H : All2_fold Q Γ1 Γ0
  q : Q Γ1 Γ0 d0 d
  ============================
   (let H := CoreTactics.block in
    let H0 := CoreTactics.block in
    All2_fold (λ (Γ Γ' : list A) (d d' : A), P Γ' d' × Q Γ Γ' d d')
      (d0 :: Γ1) (d :: Γ0))


DEBUG:Going to execute:
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
Level 0: Backtrace:

No matching clauses for match.

Goals:
    A : Type  P : list A → A → Type  Q : list A → list A → A → A → Type
  ============================
   (let H := CoreTactics.block in
    let H0 := CoreTactics.block in
    All2_fold (λ (Γ Γ' : list A) (d d' : A), P Γ' d' × Q Γ Γ' d d') [] [])

  
  A : Type
  P : list A → A → Type
  Q : list A → list A → A → A → Type
  d0 : A
  Γ1 : list A
  d : A
  Γ0 : list A
  X : All_fold P Γ0
  p : P Γ0 d
  IHX : ∀ Γ : list A,
          All2_fold Q Γ Γ0
          → All2_fold (λ (Γ0 Γ' : list A) (d d' : A), P Γ' d' × Q Γ0 Γ' d d')
              Γ Γ0
  H : All2_fold Q Γ1 Γ0
  q : Q Γ1 Γ0 d0 d
  ============================
   (let H := CoreTactics.block in
    let H0 := CoreTactics.block in
    All2_fold (λ (Γ Γ' : list A) (d d' : A), P Γ' d' × Q Γ Γ' d d')
      (d0 :: Γ1) (d :: Γ0))


DEBUG:Going to execute:
DepElim.unblock_dep_elim
Level 0: Backtrace:

No matching clauses for match.

Goals:
    A : Type  P : list A → A → Type  Q : list A → list A → A → A → Type
  ============================
   (let H := CoreTactics.block in
    let H0 := CoreTactics.block in
    All2_fold (λ (Γ Γ' : list A) (d d' : A), P Γ' d' × Q Γ Γ' d d') [] [])

  
  A : Type
  P : list A → A → Type
  Q : list A → list A → A → A → Type
  d0 : A
  Γ1 : list A
  d : A
  Γ0 : list A
  X : All_fold P Γ0
  p : P Γ0 d
  IHX : ∀ Γ : list A,
          All2_fold Q Γ Γ0
          → All2_fold (λ (Γ0 Γ' : list A) (d d' : A), P Γ' d' × Q Γ0 Γ' d d')
              Γ Γ0
  H : All2_fold Q Γ1 Γ0
  q : Q Γ1 Γ0 d0 d
  ============================
   (let H := CoreTactics.block in
    let H0 := CoreTactics.block in
    All2_fold (λ (Γ Γ' : list A) (d d' : A), P Γ' d' × Q Γ Γ' d d')
      (d0 :: Γ1) (d :: Γ0))


DEBUG:Going to execute:
match goal with
           | |- let _ := CoreTactics.block in ?T =>
                 match T with
                 | context [ CoreTactics.block ] =>
                     change T; CoreTactics.intros_until_block
                 end
           | _ => CoreTactics.unblock_goal
           end