Nuxt has some difficulties since the update of vue@2.0.6, I'm looking into it.
It's due of a change in https://github.com/vuejs/vue/commit/cb4854a50e7a44f52f54dd4707b356e3b8bf0def#diff-b92dd5290072b5c2c54f2515cc1ab572R21
<!--cmty--><!--cmty_prevent_hook--><div align="right"><sub><em>This bug report is available on <a href="https://nuxtjs.cmty.io">Nuxt.js</a> community (<a href="https://nuxtjs.cmty.io/nuxt/nuxt.js/issues/c1">#c1</a>)</em></sub></div>