Subject: Re: bug#42147: 28.0.50; pure vs side-effect-free, missing optimizations?

From: Mattias Engdegård <[email-masked]>
Date: Sun, 26 Jul 2020 11:05:45 +0200

26 juli 2020 kl. 00.30 skrev Stefan Monnier <[email-masked]>:

> But yes, it's a problem because `C-h o kbd RET` says explicitly that it
> doesn't change the match data :-(

Motivation enough for them to save the match data then.
What about the attached patch?