Goal:
    A : Type  RA : ReflectEq A  x : list A  y : list A
  ============================
   (reflectProp (x = y) (eqb_list eqb x y))


DEBUG:Going to execute:
clear H
Level 4: Backtrace:

y is used in conclusion.
Level 4: Backtrace:

y is used in conclusion.