error when mergeWith argument is an array

[caikan]

Describe the bug

mergeWith can accept an ObservableInput as an argument, but when the argument is an array (it is a legal ObservableInput), an error will be reported:
You provided 'xxx' where a stream was expected. You can provide an Observable, Promise, ReadableStream, Array, AsyncIterable, or Iterable.

Expected behavior

Treat the array as a normal ObservableInput

Reproduction code

import { EMPTY, mergeWith } from 'rxjs';

EMPTY.pipe(mergeWith([1])).subscribe(console.log);

Reproduction URL

https://stackblitz.com/edit/rxjs-aixohl?file=index.ts

Version

7.8

Environment

No response

Additional context

No response

[mrgreentm]

this is an probleam

[jakovljevic-mladen]

Fixed in #7281.