bug#11653: 23.2; Segfault with csv-mode

[Eli Zaretskii <eliz@gnu.org>]

> Date: Fri, 15 Jun 2012 21:30:56 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> 
> > Date: Fri, 15 Jun 2012 21:13:16 +0300
> > From: Eli Zaretskii <eliz@gnu.org>
> > Cc: 11653@debbugs.gnu.org
> > 
> > > Date: Wed, 13 Jun 2012 12:12:33 -0400
> > > From: Jordi Gutiérrez Hermoso <jordigh@octave.org>
> > > Cc: 11653@debbugs.gnu.org
> > > 
> > > I thought the <RET> handled it for me, because the function
> > > csv-sort-fields queries you for a value. Yes, the default of 1 is
> > > what's necessary.
> > 
> > Sorry, I cannot reproduce this no matter how hard I try.
> 
> Correction: I succeeded in reproducing this (on GNU/Linux TTY
> session).

Heh, it looks like we never had more than 16 overlay strings loaded at
the same time in the last 4.5 years since the offending code was
introduced (in Emacs 22.2)...  csv-mode has some bug whereby no less
than 2479 overlay strings are present at buffer position 1, which
triggers the bug.

Fixed in revision 108625 on the trunk.