bug#16457: 24.3.50; crash rendering Arabic Uthmani script

[Eli Zaretskii]

> Date: Wed, 15 Jan 2014 21:24:54 +0400
> From: Dmitry Antipov <dmantipov@yandex.ru>
> 
> Run 'emacs -Q', then visit attached file and eval '(move-to-column 10)' ==>
> 
> #0  0x00000034d9e0f62b in raise (sig=11) at 
> ../nptl/sysdeps/unix/sysv/linux/pt-raise.c:37
> #1  0x00000000005644fb in terminate_due_to_signal (sig=11, 
> backtrace_limit=40) at ../../trunk/src/emacs.c:378
> #2  0x000000000058e5c8 in handle_fatal_signal (sig=11) at 
> ../../trunk/src/sysdep.c:1628
> #3  0x000000000058e59d in deliver_thread_signal (sig=11, handler=0x58e5ae 
> <handle_fatal_signal>) at ../../trunk/src/sysdep.c:1602
> #4  0x000000000058e5fe in deliver_fatal_thread_signal (sig=11) at 
> ../../trunk/src/sysdep.c:1640
> #5  <signal handler called>
> #6  0x000000000056134d in PSEUDOVECTOR_TYPEP (a=0x400000000d000040, code=14) 
> at ../../trunk/src/lisp.h:2377
> #7  0x00000000005613bd in PSEUDOVECTORP (a=..., code=14) at 
> ../../trunk/src/lisp.h:2391
> #8  0x00000000005614d4 in SUB_CHAR_TABLE_P (a=...) at 
> ../../trunk/src/lisp.h:2449
> #9  0x00000000004fb65a in char_table_ref (table=..., c=4195104) at 
> ../../trunk/src/chartab.c:251
> #10 0x00000000005605f8 in CHAR_TABLE_REF (ct=..., idx=4195104) at 
> ../../trunk/src/lisp.h:1466
> #11 0x00000000006846d3 in composition_compute_stop_pos 
> (cmp_it=0x7fffa4063870, charpos=14, bytepos=26, endpos=101, string=...)
>      at ../../trunk/src/composite.c:1039
> #12 0x00000000005c14ad in scan_for_column (endpos=0x7fffa4063988, 
> goalcol=0x7fffa4063978, prevcol=0x7fffa4063980)
>      at ../../trunk/src/indent.c:601
> #13 0x00000000005c26a7 in Fmove_to_column (column=..., force=...) at 
> ../../trunk/src/indent.c:989

Looks similar to #15984, although this is a GUI session.