XY DENG

### Describe the bug ```javascript "use strict"; function e(e) { return e && "object" == typeof e && "default" in e ? e.default : e } let run = false...

 if 'v-model' was used in the functional component, the 'this' will be null. [@see](https://github.com/vuejs/jsx/pull/80#issuecomment-574550058)