Goal:
  
  A : Type
  B : Type
  C : Type
  R : A → B → C → Type
  x : A
  y : B
  z : C
  l : list A
  l' : list B
  l'' : list C
  r : R x y z
  a : All3 R l l' l''
  r0 : R x y z
  b : All3 R l l' l''
  ============================
   (let H := CoreTactics.block in
    NoConfusionHom_All3 A B C R (x :: l) (y :: l') 
      (z :: l'') (All3_cons r a) (All3_cons r0 b)
    → let H0 := CoreTactics.block in All3_cons r a = All3_cons r0 b)


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 2: Backtrace:

No matching clauses for match.

Goals:
    A : Type  B : Type  C : Type  R : A → B → C → Type
  ============================
   (let H := CoreTactics.block in
    NoConfusionHom_All3 A B C R [] [] [] All3_nil All3_nil
    → let H0 := CoreTactics.block in All3_nil = All3_nil)

  
  A : Type
  B : Type
  C : Type
  R : A → B → C → Type
  x : A
  y : B
  z : C
  l : list A
  l' : list B
  l'' : list C
  r : R x y z
  a : All3 R l l' l''
  r0 : R x y z
  b : All3 R l l' l''
  ============================
   (let H := CoreTactics.block in
    NoConfusionHom_All3 A B C R (x :: l) (y :: l') 
      (z :: l'') (All3_cons r a) (All3_cons r0 b)
    → let H0 := CoreTactics.block in All3_cons r a = All3_cons r0 b)


DEBUG:Going to execute:
DepElim.unblock_dep_elim
Level 2: Backtrace:

No matching clauses for match.

Goals:
    A : Type  B : Type  C : Type  R : A → B → C → Type
  ============================
   (let H := CoreTactics.block in
    NoConfusionHom_All3 A B C R [] [] [] All3_nil All3_nil
    → let H0 := CoreTactics.block in All3_nil = All3_nil)

  
  A : Type
  B : Type
  C : Type
  R : A → B → C → Type
  x : A
  y : B
  z : C
  l : list A
  l' : list B
  l'' : list C
  r : R x y z
  a : All3 R l l' l''
  r0 : R x y z
  b : All3 R l l' l''
  ============================
   (let H := CoreTactics.block in
    NoConfusionHom_All3 A B C R (x :: l) (y :: l') 
      (z :: l'') (All3_cons r a) (All3_cons r0 b)
    → let H0 := CoreTactics.block in All3_cons r a = All3_cons r0 b)


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