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From: Glenn Morris <rgm@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Change in face-spec-set
Date: Mon, 29 Oct 2007 02:39:25 -0400
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Richard Stallman wrote:

> Because face-spec-set is supposed to completely override the settings
> of the face, setting it from zero.
>
> With the current code, and without my patch, does that work?

Give me a test case starting from emacs -Q and I'll tell you.

If I try to guess what you might mean, then with the current code:

emacs -Q
(describe-face 'font-lock-warning-face)
  -> weight = bold

(face-spec-set 'font-lock-warning-face '((t :underline t)))
(make-frame)

On new frame:
(describe-face 'font-lock-warning-face)
  -> weight = unspecified

Is this the kind of thing you are talking about?