spread types may only be created from object types firebase

1function foo<T extends object>(t: T): T {
2  return { ...(t as object) } as T;
3}

1function foo<T extends object>(t: T): T {
2
3  return {
4    ...t    // Error: [ts] Spread types may only be created from object types.
5  }
6}

1... doc.payload.doc.data() as {}