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


DEBUG:Going to execute:
fun tac => match goal with
                      | H:?f ?a = ?f' ?a' |- _ => tac H
                      end