unierr: Is it necessary to allow err is nil?

[GGXXLL]

Now, unierr.InvalidArgumentErr(nil) will panic. Hope allow err is nil. Is it necessary? such as:

func (h *Handler) Find(writer http.ResponseWriter, request *http.Request) {
	encoder := srvhttp.NewResponseEncoder(writer)
	id := request.URL.Query().Get("id")
	if id == "" {
		// return {"code":3,"message":"InvalidArgumentErr"}
		// unierr.InvalidArgumentErr(nil)

		// return {"code":3,"message":"id is required"}
		// unierr.InvalidArgumentErr(nil, "id is required")

		// return {"code":3,"message":"id is required"}
		encoder.EncodeError(unierr.InvalidArgumentErr(nil,"id is required"))
		return
	}
	m := map[string]interface{}{}
	h.gorm.Table("track").Where("id=?", id).Order("id desc").Find(&m)

	encoder.EncodeResponse(m)
}

[Reasno]

I think it is reasonable to allow nil errors.