bug#19993: 25.0.50; Unicode fonts defective on Windows

[Eli Zaretskii]

> Date: Tue, 10 Mar 2015 19:05:54 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 19993@debbugs.gnu.org
> 
> > Date: Tue, 10 Mar 2015 09:29:56 -0700
> > From: Ilya Zakharevich <ilya@math.berkeley.edu>
> > Cc: 19993@debbugs.gnu.org
> > 
> > Choosing the first font which has a subset of a character “identified”
> > is not a reasonable thing to do.
> 
> See my other messages: I'm not sure we actually do that.  It's
> possible that the subrange test is used only as a filter, after we
> already identified the candidate fonts.

In fact, it's almost certainly a filter: at least my reading of
ww32font.c:font_matches_spec is that if the font spec specifies a
script, then fonts that do NOT have the corresponding subrange bit set
are rejected.