Incorrect runtime prop type inference when using `Prettify`

[lozinsky]

Vue version

3.5.15-3.5.16, 3.5.19-3.5.21

Link to minimal reproduction

https://play.vuejs.org/#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

Steps to reproduce

1. Open the reproduction link
2. Check the developer console
3. You will see the runtime prop validation warning:

Invalid prop: type check failed for prop "placement". Expected Object, got String with value "bottom".

What is expected?

There should be no prop validation warning.

What is actually happening?

Before version 3.5.15, the runtime type was inferred as null when using a complex type like Prettify. Now, it is inferred as Object, which doesn’t seem correct for runtime type checking in this case.

System Info

Any additional comments?

This issue may be related to #13245, #12876.

[edison1105]

duplicate of #13847