Optional prop still throws required type error when using function signature.

[youranreus]

Vue version

3.4.31

Link to minimal reproduction

https://play.vuejs.org/#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

Steps to reproduce

use defineComponent in function sgnature to define a genric component with an optional prop

use the component somewhere else.

In my minimal reproduction, just simply remove one of child component`s prop and add it again can repoduce the error.

What is expected?

Optional prop should not throw required type error.

What is actually happening?

Optional prop still throws required type error.

System Info

No response

Any additional comments?

No response

[edison1105]

I can't reproduce it on my local machine with

"vue": "3.5.13",
"typescript": "5.7.2",
"vue-tsc": "2.2.0"

[youranreus]

I can't reproduce it on my local machine with

"vue": "3.5.13",
"typescript": "5.7.2",
"vue-tsc": "2.2.0"

Hi, thanks for your comment. I`ve tried the version same as yours and still has the same error. Can you reproduce it in the vue playground that I provide above?