Augmenting `ComponentCustomOptions` with a function causes `TS2769` when using augmention

[6XGate]

Version

2.7.14

Reproduction link

github.com

Steps to reproduce

1. Augment the ComponentCustomOptions interface with a new optional member function. Example: funcOption?: (...) => ....
2. Use the new member function in defineComponent. Example defineComponent({ name: 'CompName', funcOption: (...) => ... }).
3. Run a build with type-checking. Example: npm run build with vite and vue-tsc installed and setup.

---

Using the repro link:

1. Clone the repo
2. Run npm ci
3. Run npm run build

What is expected?

That the build would succeed without error.

What is actually happening?

A TS2769 error results when built. It seems TypeScript is attempting to use the functional component overload rather than one of the normal overloads.

[6XGate]

Just discovered the same issue with augment ComponentOptions as well.

[rudyxu1102]

It will work if you change the return value of the funcOption.

const HomeView = defineComponent({
  name: 'HomeView',
  components: { TheWelcome },
  funcOption: route => {
    return {}
  }
})