bug#10035: Crash in check_x_frame in w32fns.c

[Eli Zaretskii]

> From: Juanma Barranquero <lekktu@gmail.com>
> Date: Mon, 14 Nov 2011 18:41:54 +0100
> Cc: cschol2112@googlemail.com, 10035@debbugs.gnu.org
> 
> On Mon, Nov 14, 2011 at 18:08, Eli Zaretskii <eliz@gnu.org> wrote:
> 
> > A reproducible test case would help tremendously, assuming
> > it is feasible for you to come up with one.
> 
> Here is one recipe that works for me:
> 
> cd src
> gdb ..\bin\emacs.exe
> run -Q ChangeLog
> C-o
> C-a

Great, thanks.  It looks like some code is adding a face, but does not
update the row's hash value, and trailing-whitespace is the key.