bug#16691: 24.3.50; emacs_backtrace.txt

[Eli Zaretskii]

> Date: Sat, 08 Feb 2014 21:06:14 +0100
> From: martin rudalics <rudalics@gmx.at>
> CC: Juanma Barranquero <lekktu@gmail.com>, drew.adams@oracle.com, 
>  16691@debbugs.gnu.org, control@debbugs.gnu.org
> 
> > Since this started happening only lately, Martin, could you please see
> > if some of your changes could possibly disrupt the glyph row's hash
> > values?
> 
> If you told me how I could have done that, maybe.  I don't have the
> slightest idea.

I don't know if you did that.  I just took a look at the latest
changes preceding the first revno where Drew reported this.

As to how this could happen: did any of your changes affect the 'used'
field of the glyph_row structure, under any circumstances?