> Not sure I understand: are you saying that hello.art uses an extension
> of some image files, but is not an image?  If so, why is that a bug --
> these things can happen with any file, and removing an extension just
> because there's one example to the contrary isn't necessarily a good
> idea.
> 
> Or did I miss something?

Sorry if this was unclear.

Extensions and actual content don't necessary match the auto-mode-alist mapping.

If the extension does not match Emacs' expectations, it should not freeze it for
a minute and almost halt the computer to a grind.

In other words, Emacs should fail gracefully when image-mode does not make sense
with the actual content of the file.

Does that make sense?

-- 
Pierre Neidhardt
https://ambrevar.xyz/