Type error when ref-ing a component with an empty props object

[henribru]

Putting a ref on a component that has an empty props object gives a pretty obscure type error, see https://github.com/henribru/volar-bug-repro for a reproduction.

Argument of type '{ ref: string; }' is not assignable to parameter of type '(Partial<{ [x: number]: string; } | {}> & Omit<(Readonly<readonly unknown[] & { [x: number]: string; } & { [iterator]?: IterableIterator<string> | undefined; length?: number | undefined; ... 21 more ...; flat?: unknown[] | undefined; }> | Readonly<...>) & (VNodeProps & ... 2 more ... & Readonly<...>), never>) & Omit...'.\n  Type '{ ref: string; }' is not assignable to type 'Partial<{}> & Omit<(Readonly<readonly unknown[] & { [x: number]: string; } & { [iterator]?: IterableIterator<string> | undefined; length?: number | undefined; toString?: string | undefined; ... 20 more ...; flat?: unknown[] | undefined; }> | Readonly<...>) & (VNodeProps & ... 2 more ... & Readonly<...>), never> & Om...'.

[johnsoncodehk]

@pikax when props option is empty object, $props type seem became array type, is it expected?

[pikax]

@johnsoncodehk I noticed that when I was trying to fix vuejs/core#4051