new Vue cannot infer mixin types

This issue has been created since 2022-08-08.

Version

2.7.8

Reproduction link

codesandbox.io

Steps to reproduce

open CodeSandBox, and see line 14 in main.ts

What is expected?

type check without error.

What is actually happening?

Property 'helloThere' does not exist on type 'CombinedVueInstance<Vue<Record<string, any>, Record<string, any>, never, never, (event: string, ...args: any[]) => Vue<Record<string, any>, Record<string, any>, never, never, ...>>, ... 4 more ..., {}>'.ts(2339)

More Details About Repo
Owner Name vuejs
Repo Name vue
Full Name vuejs/vue
Language TypeScript
Created Date 2013-07-29
Updated Date 2022-09-27
Star Count 199644
Watcher Count 6098
Fork Count 32848
Issue Count 587

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