### Version 3.0.0-alpha.4 ### Reproduction link [https://codesandbox.io/s/github/vuejs/vue-next-webpack-preview](https://codesandbox.io/s/github/vuejs/vue-next-webpack-preview) ### Steps to reproduce How is it possible to use a render function in a component? using render() { return h("div", "children");} on the same level as setup does not work. ### What is expected? children should be rendered ### What is actually happening? Nothing happens. <!-- generated by vue-issues. DO NOT REMOVE -->