Subject: Re: bug#13814: 24.3.50; Dynamic variables shadowing prevent defvar

From: Eli Zaretskii <[email-masked]>
Date: Wed, 25 Aug 2021 19:03:31 +0300

> Cc: [email-masked], Jorgen Schaefer <[email-masked]>
> Date: Wed, 25 Aug 2021 10:41:09 -0400
> From:  Stefan Monnier via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <[email-masked]>
> 
> > That's being defeatist -- surely theory implies that time travel should
> > be available any day now...
> 
> I heard it was available in early versions of Emacs,

Emacs supports that since eons ago: see Antinews in the manual.