Re: Strange code in emacs.c

[Eli Zaretskii <eliz@gnu.org>]

> Cc: emacs-devel@gnu.org
> From: Paul Eggert <eggert@cs.ucla.edu>
> Date: Wed, 3 Oct 2018 10:36:35 -0700
> 
> > Don't we mean to set emacs_re_safe_alloca like this instead:
> > 
> >        emacs_re_safe_alloca = min (lim - extra, SIZE_MAX) / ratio;
> >        emacs_re_safe_alloca = max (emacs_re_safe_alloca * min_ratio, MAX_ALLOCA);
> 
> Yes, that sounds better to me too. Also, that SIZE_MAX should be changed to min 
> (SIZE_MAX, PTRDIFF_MAX) to avoid (unlikely) integer-overflow issues.

OK, will do.

> Should this fix be put into master or into the emacs-26 branch?

It's a bit scary to do this on emacs-26, as the effect is a dramatic
increase in stack usage by regex routines on most platforms.  So I
thought about doing this on master.  But I'm eager to be convinced by
good arguments to the contrary ;-)