- [ ] I have searched the [issues](https://github.com/vueComponent/ant-design-vue/issues) of this repository and believe that this is not a duplicate. ### Version 1.3.1 ### Environment Google Chrome 71.0.3578.98（正式版本） （64 位） ### Reproduction link [https://vuecomponent.github.io/ant-design-vue/components/form-cn/](https://vuecomponent.github.io/ant-design-vue/components/form-cn/) ### Steps to reproduce Input正常输入内容，文本框中的值触发change时，出错 ### What is expected? 正常输入 ### What is actually happening? 控制台有出错信息 --- webpack-internal:///./node_modules/vue/dist/vue.esm.js:611 [Vue warn]: Error in updated hook: "TypeError: Cannot read property 'cleanUpUselessFields' of undefined" found in  <!-- generated by issue-helper. DO NOT REMOVE -->