bug#6974: Emacs doesn't like Swedish ä (on w32)

[Eli Zaretskii]

> Date: Fri, 03 Sep 2010 18:23:33 +0200
> From: Andreas Röhler <andreas.roehler@easy-emacs.de>
> CC: bug-gnu-emacs@gnu.org
> 
> >   M-: (unencodable-char-position (point-min) (point-max) 'utf-8) RET
> >
> > It should show you the first position in the buffer where you have a
> > character that cannot be encoded by UTF-8.  If all the characters can
> > be encoded by UTF-8, this will evaluate to nil.
> 
> With buffer narrowed to the code from screen-shot it says:
> 
> 3993 (#o7631, #xf99)

Well, what is at buffer position 3993?