Re: buffer-face-set changes the fringe, is it a bug?

[Eli Zaretskii]

> Date: Mon, 6 Jul 2020 14:22:16 +0200 (CEST)
> From: Gregory Heytings via "Emacs development discussions." 
> <emacs-devel@gnu.org>
> 
> So it seems that it's only when a face remapping takes place that an 
> omitted face in [1] means using the default face.  Before the face 
> remapping takes place, the fringe face is used instead.

No, it uses the default face, but the result is produced slightly
differently (not by actually merging the two faces).