bug#58334: 29.0.50; ASAN heap use after free in gui_produce_glyphs

[Eli Zaretskii]

> Date: Thu, 6 Oct 2022 20:36:22 +0200
> Cc: 58334@debbugs.gnu.org, luangruo@yahoo.com
> From: Gerd Möllmann <gerd.moellmann@gmail.com>
> 
> On 22-10-06 20:30 , Eli Zaretskii wrote:
> > Actually, I no longer think this will help, because redisplay_internal
> > sets inhibit_free_realized_faces to zero at the beginning...
> 
> Yeah, I've seen the specbind right now.
> 
> > Any way of figuring out which face is it that triggers the ASAN?  Is
> > it one of the basic faces, or some non-basic face?
> 
> I'm afraid no.  What about the idea to additionally check for inhibited 
> GC?  That is, free faces only if not imhibit_free and not imhibit_gc?

I don't see how "GC inhibited" is related, except by chance.  It
sounds wrong to conflate the two.