children component doesn't compile successful

[himushroom]

Version

3.0.11

Reproduction link

https://github.com/himushroom/MCalendarPanel

Steps to reproduce

1. git clone https://github.com/himushroom/MCalendarPanel
2. yarn
3. yarn dev
4. see the developer tools Console tab

What is expected?

The children component should be compile.

What is actually happening?

The children component doesn't compile successful.

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This is a npm package 'm-calendar-panel'.
I have modified it according to the issue,but it not work for me.
segementfault:https://segmentfault.com/q/1010000040076170

[posva]

Follow https://new-issue.vuejs.org/?repo=vuejs/vue-next#why-repro. or use the chat/forum to ask questions.