vite6.0.7 packaging @vue/reactivity exception

[Caaalabash]

Describe the bug

when I upgrade vite from 4.3.9 to 6.0.7 and run build, I found some code are lost：

0. example code

1. change vite version to 5.0.0-beta.9, run npm build

2. change vite version to 5.0.0-beta.10 or 6.0.7, run npm install && npm run build

check the changelog, found this.

Is this a bug in rollup v4? or this is the right behavior？

Reproduction

https://stackblitz.com/edit/vitejs-vite-t5w3pav5?file=utils.ts

Steps to reproduce

System Info

-

Used Package Manager

npm

Logs

Validations

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[Caaalabash]

right behavior of treeshake