vite: vue unref error

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Describe the bug

@yyx990803 I think there will be many such problems in this update

<script lang="ts">
  import { defineComponent, ref, unref } from 'vue';
  export default defineComponent({
    name: 'App',
    setup() {
      const count = ref(0);
      console.log(unref(count));
      return {};
    },
  });
</script>

Reproduction

git clone https://github.com/anncwb/vite-bug yarn && yarn serve

System Info

• vite version:beta.41
• Operating System:
• Node version:
• Package manager (npm/yarn/pnpm) and version:

Logs (Optional if provided reproduction)

1. Run vite or vite build with the --debug flag.
2. Provide the error log here.