This was only ever a gag, right? I tried it in the early hours of the meme and got something to the effect of “you didn’t attach an image, so I don’t have anything to work from.”

I once accidentally got a version of this. Was asking it to change the wheels on a picture of a car, and provided a link to the original image. I guess it was blocked from accessing the url, but it assumed that it could and generated a random car image with the wheels in the color I'd requested. I imagine the same approach would work for making it think you'd provided an image here.

They patched it.