Goal:
  
  A : Type
  B : Type
  C : Type
  Q : C → Type
  P : C → A → Prop
  x : A
  xs : list A
  y : C
  X : Q y
  h1 : list A
  h : All (P y) h1
  ============================
   (x :: xs = h1
    → let H := CoreTactics.block in let H0 := CoreTactics.block in P y x)


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
                                  (All (P y) h1)"
in
environment:
A : Type
B : Type
C : Type
Q : C → Type
P : C → A → Prop
x : A
xs : list A
y : C
X : Q y
h1 : list A
h : All (P y) h1


Level 3: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All (P y) h1)"
in
environment:
A : Type
B : Type
C : Type
Q : C → Type
P : C → A → Prop
x : A
xs : list A
y : C
X : Q y
h1 : list A
h : All (P y) h1

Level 2: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All (P y) h1)"
in
environment:
A : Type
B : Type
C : Type
Q : C → Type
P : C → A → Prop
x : A
xs : list A
y : C
X : Q y
h1 : list A
h : All (P y) h1

Level 2: evaluation
raised the exception
Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All (P y) h1)"
in
environment:
A : Type
B : Type
C : Type
Q : C → Type
P : C → A → Prop
x : A
xs : list A
y : C
X : Q y
h1 : list A
h : All (P y) h1


Level 2: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All (P y) h1)"
in
environment:
A : Type
B : Type
C : Type
Q : C → Type
P : C → A → Prop
x : A
xs : list A
y : C
X : Q y
h1 : list A
h : All (P y) h1

Level 2: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All (P y) h1)"
in
environment:
A : Type
B : Type
C : Type
Q : C → Type
P : C → A → Prop
x : A
xs : list A
y : C
X : Q y
h1 : list A
h : All (P y) h1

Level 1: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All (P y) h1)"
in
environment:
A : Type
B : Type
C : Type
Q : C → Type
P : C → A → Prop
x : A
xs : list A
y : C
X : Q y
h1 : list A
h : All (P y) h1

Level 1: evaluation
raised the exception
Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All (P y) h1)"
in
environment:
A : Type
B : Type
C : Type
Q : C → Type
P : C → A → Prop
x : A
xs : list A
y : C
X : Q y
h1 : list A
h : All (P y) h1


Level 1: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All (P y) h1)"
in
environment:
A : Type
B : Type
C : Type
Q : C → Type
P : C → A → Prop
x : A
xs : list A
y : C
X : Q y
h1 : list A
h : All (P y) h1

Level 0: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All (P y) h1)"
in
environment:
A : Type
B : Type
C : Type
Q : C → Type
P : C → A → Prop
x : A
xs : list A
y : C
X : Q y
h1 : list A
h : All (P y) h1