From: Felix Dietrich <felix.dietrich@sperrhaken.name>
To: help-gnu-emacs@gnu.org
Subject: Re: how to track down "invalid face attribute" errors?
Date: Wed, 05 Oct 2022 13:29:33 +0200 [thread overview]
Message-ID: <87h70icxuq.fsf@sperrhaken.name> (raw)
In-Reply-To: <87lepvalvl.fsf@sperrhaken.name> (Felix Dietrich's message of "Tue, 04 Oct 2022 13:06:38 +0200")
Felix Dietrich <felix.dietrich@sperrhaken.name> writes:
> Felix Dietrich <felix.dietrich@sperrhaken.name> writes:
>
>> Emanuel Berg <incal@dataswamp.org> writes:
>>
>>> Isn't it better to initialize the faces first, and if it is
>>> attempted to define [a face] using invalid attributes, then that
>>> would be an error?
>>
>> This already happens to a degree for named faces: if you use ‘defface’
>> to create a face with :foreground set to nil, subsequent calls to
>> ‘face-attribute’ for :foreground on that face will return ‘unspecified’:
>>
>> #+begin_src emacs-lisp
>> (progn
>> (defface my/test '((t . (:foreground nil))) "test face")
>> (face-attribute 'my/test :foreground))
>> #+end_src
>
> I was not correct with my assumption: when you ‘defface’ a face with an
> invalid :foreground value this will produce an error, but enough of the
> face with the invalid value remains that later creations of new frames
> using ‘make-frame-command’ will fail with that same error:
>
> #+begin_src emacs-lisp
> (progn
> (ignore-errors
> (defface my/test03 '((t . (:foreground nil))) "test face"))
> (make-frame-command))
> #+end_src
>
> This produces the error “(wrong-type-argument stringp :bla)”.
I copied the wrong snippet from my experiments. It should have been
this:
#+begin_src emacs-lisp
(progn
(ignore-errors
(defface my/test '((t . (:foreground :bla))) "test face"))
(make-frame-command))
#+end_src
--
Felix Dietrich
next prev parent reply other threads:[~2022-10-05 11:29 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-25 12:03 how to track down "invalid face attribute" errors? Eric S Fraga
2022-09-25 13:00 ` Emanuel Berg
2022-09-26 9:04 ` Eric S Fraga
2022-09-26 9:40 ` Robert Pluim
2022-09-26 9:50 ` Fraga, Eric
2022-09-27 11:12 ` Felix Dietrich
2022-09-27 14:08 ` Robert Pluim
2022-10-05 12:32 ` Felix Dietrich
2022-10-05 13:31 ` Robert Pluim
2022-10-05 13:51 ` Eli Zaretskii
2022-10-06 14:58 ` Felix Dietrich
2022-09-28 11:41 ` Stefan Monnier via Users list for the GNU Emacs text editor
2022-09-28 15:04 ` Robert Pluim
2022-09-29 16:32 ` Emanuel Berg
2022-10-03 19:19 ` Felix Dietrich
2022-10-03 22:46 ` Emanuel Berg
2022-10-04 11:06 ` Felix Dietrich
2022-10-05 11:29 ` Felix Dietrich [this message]
2022-09-25 14:01 ` Eli Zaretskii
2022-09-25 15:53 ` Eric S Fraga
2022-09-25 16:06 ` Eli Zaretskii
2022-09-25 17:20 ` Eric S Fraga
2022-09-25 14:26 ` Felix Dietrich
2022-09-25 15:51 ` Fraga, Eric
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