func mapForm(formStruct reflect.Value, form map[string][]string, formfile map[string][]*multipart.FileHeader, errors Errors) the last param is not a pointer,so if has errors,it don't get work
func mapForm(formStruct reflect.Value, form map[string][]string,
formfile map[string][]*multipart.FileHeader, errors Errors)
the last param is not a pointer,so if has errors,it don't get work