Re: MPS: face-cache

[Eli Zaretskii]

> From: Gerd Möllmann <gerd.moellmann@gmail.com>
> Cc: eller.helmut@gmail.com,  emacs-devel@gnu.org
> Date: Sun, 28 Apr 2024 08:28:39 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > But there's also FRAME_FONTSET, e.g. for w32:
> >
> >   #define FRAME_FONTSET(f) ((f)->output_data.w32->fontset)
> >
> > Are we handling it correctly vis-a-vis GC?  fix_frame doesn't do
> > anything with it, AFAICT.  Should it?
> >
> 
> Yeah, I think I see something similar here, but I don't understand it.
> 
> In my case, it looks like a string which is created by Ffont_xlfd_name
> is later garbled. The string is used as the name of a fontset. Fontsets
> are PVEC_CHAR_TABLE, which, AFAIU, are treated like normal vectors
> during old GC. It's a bit confusing to me... Fix_char_table does that
> for the new GC in a similar way.

Maybe it all works because the pseudo-vector's SIZE includes the
extras?