> From: Денис Редозубов <denis.redozubov@gmail.com>
> Date: Wed, 2 Aug 2017 10:53:20 +0300
> Cc: Eli Zaretskii <eliz@gnu.org>, 27761@debbugs.gnu.org,
>       "Charles A. Roelli" <charles@aurox.ch>

>
> 7324 success_p = get_next_display_element (it);
> (gdb) p it->current
> $7 = {
> pos = {
> charpos = 4138,
> bytepos = 4138
> },
> overlay_string_index = -1,
> string_pos = {
> charpos = 6,
> bytepos = 6
> },
> dpvec_index = -1
> }
> (gdb) p it->sp
> $8 = 2
> (gdb) p it->object
> $9 = Python Exception <type 'exceptions.AttributeError'> 'NoneType' object has no attribute 'value':
>
> (gdb) xtype
> Lisp_String
> (gdb) p it->position
> $10 = {
> charpos = 0,
> bytepos = 0
> }
> (gdb) p it->string
> $11 = Python Exception <type 'exceptions.AttributeError'> 'NoneType' object has no attribute 'value':
>
> (gdb) xstring
> $12 = (struct Lisp_String *) 0x10da1ee10
> " 163"

Thanks.  The "charpos = 6" part puzzles me, because the string is only
4 characters long.  What does this produce:

  (gdb) p *$12
  (gdb) up
  (gdb) p it->current
  (gdb) p it->sp
  (gdb) p it->string
  (gdb) xstring