init data by access props is undefinded

code example:

<template>
  <span>{{ test }}-{{ local }}</span>
</template>

<script>
import { Component, Prop, Vue } from 'vue-property-decorator';

@Component
export default class HelloWorld extends Vue {
  @Prop({default: ()=>({aaa: 456})}) msg;

  local = JSON.parse(JSON.stringify(this.msg));

  get test() {
    return this.msg.aaa;
  }
}
</script>

this code is works in lower version. recent days,i want to upgrade my dependencies, but get problems with this code.

[farazshuja]

Added in tsconfig.json, now its working fine for me "useDefineForClassFields": false,

tested on typescript v. 4.7.4

[kagaricyan]

I decide rewrite all class component using composition api