simultaneous use default script and script setup cause compile error

[PiscineMolitorPatel]

Version

3.2.4

Reproduction link

https://github.com/vuejs/rfcs/blob/master/active-rfcs/0040-script-setup.md#detailed-design

Steps to reproduce

I must use <script> frist，then use <script setup>, Otherwise it will throw an error.

If I use it like this，the browser will give an error ：Cannot access 'default' before initialization

<script lang="ts" setup>
// do something
</script>

<script lang="ts">
import { defineComponent } from 'vue'
export default defineComponent({
  name: '"MyComponent"
})
</script>

What is expected?

no error

What is actually happening?

Error: Cannot access 'default' before initialization

---

my english is not good, I use translation

中文说明：当我同时使用 script 和 script setup 时，我必须优先使用默认的 script，然后使用 script setup 特性，如果将它们的书写顺序颠倒过来会导致浏览器抛出错误，但在启动服务时不会出现问题

[lidlanca]

export default <script> block, can not be after <script setup>
error
ReferenceError: can't access lexical declaration '__default__' before initialization

input:

<template>

</template>


<script lang="ts" setup>
  // do something
</script>


<script lang="ts">
  import { defineComponent } from 'vue'
  export default defineComponent({
    name:  "MyComponent"
  })
</script>

generated:

import { defineComponent as _defineComponent } from 'vue'


const __sfc__ = _defineComponent({
  ...__default__,  // <-- ReferenceError: can't access lexical declaration '__default__' before initialization
  setup(__props) {

  // do something

return (_ctx,_cache) => {
  return null
}
}

})
  import { defineComponent } from 'vue'
  const __default__ = defineComponent({
    name:  "MyComponent"
  })
__sfc__.__file = "Comp.vue"
export default __sfc__

[posva]

This is mentioned in the RFC

[klwfwdk]

This is mentioned in the RFC

why it works well in js, and only lang="ts" has error.

[Bigfish8]

This is mentioned in the RFC

https://github.com/vuejs/rfcs/blob/script-setup/active-rfcs/0000-script-setup.md
It seems the condition is not mentioned in the RFC.
Do I find the right place?