bug#11653: 23.2; Segfault with csv-mode

[Eli Zaretskii <eliz@gnu.org>]

> Date: Wed, 13 Jun 2012 10:32:00 -0400
> From: Jordi Gutiérrez Hermoso <jordigh@octave.org>
> Cc: 11653@debbugs.gnu.org
> 
> >> (gdb) bt
> >> #0  0x0000000000438b03 in handle_face_prop (it=0x7fffffffb0c0) at xdisp.c:3693
> >
> > In frame 0, can you show what does the following GDB command print?
> 
> Sure thing:
> 
>     Program received signal SIGSEGV, Segmentation fault.
>     0x0000000000438649 in handle_face_prop (it=0x7fffffffb180) at xdisp.c:3689
>     3689		= (it->current.overlay_string_index >= 0
>     (gdb) p it->current
>     $1 = {
>       pos = {
>         charpos = 1,
>         bytepos = 1
>       },
>       overlay_string_index = 1935,   <<<<<<<<<<<<<<<<<<<<<<<
>       string_pos = {
>         charpos = 0,
>         bytepos = 0

Are there this many overlay strings in the buffer at character
position 1?  If not, this huge number is probably garbage, and is the
cause for the segfault.

Btw, when I tried your recipe, Emacs asked me about the column to sort
by, which was not in your recipe.  Can you double-check if your recipe
is 100% correct and does not omit any important details?