Goal:
  
  A : Type
  B : Type
  C : Type
  P : nat → A → B → Type
  Q : B → C → Type
  R : B → C → Type
  l'' : list C
  n : nat
  H1' : list B
  H1 : list C
  H : All2 Q H1' H1
  ============================
   ({| pr1 := []; pr2 := l'' |} = {| pr1 := H1'; pr2 := H1 |}
    → let H := CoreTactics.block in
      let H0 := CoreTactics.block in
      (∀ (n : nat) (x : A) (y : B) (z : C), P n x y → Q y z → R y z)
      → All2 R [] l'')


DEBUG:Going to execute:
destruct p || (case p; clear p)
Level 4: evaluation of term
raised the exception
Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 Q H1' H1)"
in
environment:
A : Type
B : Type
C : Type
P : nat → A → B → Type
Q : B → C → Type
R : B → C → Type
l'' : list C
n : nat
H1' : list B
H1 : list C
H : All2 Q H1' H1


Level 3: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 Q H1' H1)"
in
environment:
A : Type
B : Type
C : Type
P : nat → A → B → Type
Q : B → C → Type
R : B → C → Type
l'' : list C
n : nat
H1' : list B
H1 : list C
H : All2 Q H1' H1

Level 2: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 Q H1' H1)"
in
environment:
A : Type
B : Type
C : Type
P : nat → A → B → Type
Q : B → C → Type
R : B → C → Type
l'' : list C
n : nat
H1' : list B
H1 : list C
H : All2 Q H1' H1

Level 2: evaluation
raised the exception
Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 Q H1' H1)"
in
environment:
A : Type
B : Type
C : Type
P : nat → A → B → Type
Q : B → C → Type
R : B → C → Type
l'' : list C
n : nat
H1' : list B
H1 : list C
H : All2 Q H1' H1


Level 2: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 Q H1' H1)"
in
environment:
A : Type
B : Type
C : Type
P : nat → A → B → Type
Q : B → C → Type
R : B → C → Type
l'' : list C
n : nat
H1' : list B
H1 : list C
H : All2 Q H1' H1

Level 2: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 Q H1' H1)"
in
environment:
A : Type
B : Type
C : Type
P : nat → A → B → Type
Q : B → C → Type
R : B → C → Type
l'' : list C
n : nat
H1' : list B
H1 : list C
H : All2 Q H1' H1

Level 1: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 Q H1' H1)"
in
environment:
A : Type
B : Type
C : Type
P : nat → A → B → Type
Q : B → C → Type
R : B → C → Type
l'' : list C
n : nat
H1' : list B
H1 : list C
H : All2 Q H1' H1

Level 1: evaluation
raised the exception
Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 Q H1' H1)"
in
environment:
A : Type
B : Type
C : Type
P : nat → A → B → Type
Q : B → C → Type
R : B → C → Type
l'' : list C
n : nat
H1' : list B
H1 : list C
H : All2 Q H1' H1


Level 1: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 Q H1' H1)"
in
environment:
A : Type
B : Type
C : Type
P : nat → A → B → Type
Q : B → C → Type
R : B → C → Type
l'' : list C
n : nat
H1' : list B
H1 : list C
H : All2 Q H1' H1

Level 0: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 Q H1' H1)"
in
environment:
A : Type
B : Type
C : Type
P : nat → A → B → Type
Q : B → C → Type
R : B → C → Type
l'' : list C
n : nat
H1' : list B
H1 : list C
H : All2 Q H1' H1