Subject: Re: bug#55744: infinite loop

From: Eli Zaretskii <[email-masked]>
Date: Tue, 07 Jun 2022 05:28:08 +0300

> Cc: [email-masked], [email-masked]
> From: Richard Stallman <[email-masked]>
> Date: Mon, 06 Jun 2022 18:15:06 -0400
> 
>   > That's a regexp with a lot of backtracking, I think (i.e., elements that
>   > can be matched both by the ?'s as well as the two *'s).  So matching
>   > this will be slow, which results in the hangs you're seeing when Emacs
>   > is trying to match that to the text in the buffer.
> 
> Would it make sense to say more about this point in the Emacs Lisp Manual
> where it describes regexps?

I think we already do, see the node "Regexp Problems" there.