func_errors.m:011: Error: some but not all arguments have modes.
func_errors.m:011:   The arguments without modes are the second and the return
func_errors.m:011:   value.
func_errors.m:012: Error: some but not all arguments have modes.
func_errors.m:012:   The argument without a mode is the return value.
func_errors.m:013: Error: some but not all arguments have modes.
func_errors.m:013:   The arguments without modes are the first and second.
func_errors.m:017: Error: predicate `p'/2 declares a determinism without
func_errors.m:017:   declaring the modes of its arguments.
func_errors.m:019: Error: some but not all arguments have modes.
func_errors.m:019:   The arguments without modes are the second and third.