[2.0.0-rc.1]change the binding 'value' (v-model) of a component will trigger another component's observe data changes callback.

[baiyaaaaa]

Vue.js version

2.0.0-rc.1

Reproduction Link

https://jsbin.com/kejonip/edit?html,js,output

Steps to reproduce

input any thing

What is Expected?

nothing alert.

What is actually happening?

alert 'checkboxGroup value change!'