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From: Richard Stallman <rms@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Buffer size limitation in insdel.c
Date: Sat, 25 Sep 2010 05:40:39 -0400
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Xref: news.gmane.org gmane.emacs.devel:130834
Archived-At: <http://permalink.gmane.org/gmane.emacs.devel/130834>

    The reason for this code is that many places use an int to hold buffer
    positions.  All these places are bugs; they should use EMACS_INT
    instead.  This code hides those bugs.

I'd say it prevents them from really being bugs.

If people want to fix those places to handle larger buffers,
I have no objections.  However, I doubt your physical memory will
support very many 2-gig strings.