bug#6621: Emacs crash when trying to report emacs crash

[Eli Zaretskii]

> Date: Tue, 13 Jul 2010 19:15:33 +0300
> From: Yair F <yair.f.lists@gmail.com>
> Cc: 6621@debbugs.gnu.org
> 
> (gdb) frame 7
> #7  0x0809c519 in get_next_display_element (it=0xbfffc338) at xdisp.c:6051
> 6051              it->face_id = FACE_FOR_CHAR (it->f, face, it->c,
> pos, it->string);
> (gdb) pit
> cur=150[276] pos=150[276] start=128[235] end=3160 stop=3160 face=13 MB
> ch=[4195671,2]
> vpos=6 hpos=15 y=102 lvy=561 x=98 vx=0-640 w=0 a+d=13+4=17 max=13+4=17

Strange.  Looks like the iterator indeed loaded this value 4195671
somehow.  But it claims that the character took 2 bytes, which is
correct for HET, but incorrect for such large values.  Perhaps
Handa-san will have ideas.