bug#18438: 24.4.50; assertion failed in bidi.c

[Eli Zaretskii]

> Date: Sun, 19 Oct 2014 11:37:54 -0400
> From: Ken Brown <kbrown@cornell.edu>
> CC: aidalgol@amuri.net, 18438@debbugs.gnu.org
> 
> What about your earlier suggestion (from 
> http://debbugs.gnu.org/cgi/bugreport.cgi?bug=18438#139) to force a 64-bit 
> compare instruction for 'type', with the latter in a 64-bit register:

Surely worth trying, but I'd like first to see one or 2 more detailed
backtraces like the last one, in case some pattern emerges from what
we see there.