script setup: ref imported from a .vue file doesn't work after build #2735
Description
Version
3.0.4
Reproduction link
https://github.com/stephanedemotte/_issue-vue3-script-setup
Steps to reproduce
Create a fresh vitejs app
helloworld.vue
<template>
<div>
HelloWorld [{{ isActiveTpl }}]
</div>
</template>
<script>
import { ref } from 'vue'
export const isActive = ref(false)
</script>
<script setup>
const isActiveTpl = isActive
</script>
app.vue
<template>
<div>
App [{{ isActive }}]
</div>
</template>
<script setup>
import { isActive } from './components/HelloWorld.vue'
</script>
What is expected?
the value should be: true / false
What is actually happening?
After build the ref variable output a weird value
If i try to do isActive = !isActive on app.vue, i've got no error on dev, but got Error: Illegal reassignment to import 'isActive' when i try to build
Builded link
http://test-vue-export.gaidaandsteph.com/