Vue-Warn when using chips with array of objects

[bhoriuchi]

Steps to reproduce

<template>
  <div>
    <md-chips v-model="chips" md-placeholder="Add chip...">
      <template slot="md-chip" slot-scope="{ chip }">
        {{ chip.name }}
      </template>
    </md-chips>
  </div>
</template>

<script>
export default {
  data () {
    return {
      chips: [
        {id: 'asdfghjkl', name: 'foo'},
        {id: 'lkjhgfdsa', name: 'bar'}
      ]
    }
  }
}
</script>

Which browser?

Mac OSX 10.13.6
Chrome 75
Vue 2.5.2
Vue-material: 1.0.0-beta-11

What is expected?

display chips without warning

What is actually happening?

Warn in dev console. Chips display correctly

vue.esm.js?efeb:628 [Vue warn]: Avoid using non-primitive value as key, use string/number value instead.