comment_form() does not pass post_id argument onto comments_open()

I noticed today that comment_form() does not pass the $post_id argument onto comments_open() on line 1550 of comment-template.php. This presents a challenge when one wants to, for whatever reason, display a comment_form() outside of post context (or, perhaps in their own post context).

By simply passing $post_id to comments_open() the form will display correctly.

Comments read:

@param mixed $post_id Post ID to generate the form for, uses the current post if null

In fact, the form will _only_ generate if there is a current post.

Curious to know your thoughts on this.