Re: colours lost

[Madhu <enometh@meer.net>]

* Noam Postavsky  <CAM-tV-9rsqFrrX31dB66m=h6cfW7HrawvhUCLXMtUUqYos78=g@mail.gmail.com> :
Wrote on Wed, 15 May 2019 09:31:42 -0400:

> On Wed, 15 May 2019 at 09:15, Madhu <enometh@meer.net> wrote:
>
>> I haven't figured out what triggers the problem yet, but the clue is
>> it is related to global-font-lock-mode.
>>
>> When the problem described occurs, global-font-lock-mode is t.
>>
>> C-u C-x = on a piece of text which shows the bold face in the *Faces*
>> buffer shows:
>> ,----
>> | There are text properties here:
>> |   button               (t)
>> |   category             help-face-button
>> |   fontified            t
>> |   help-args            (bold)
>> |   read-face-name       bold
>> `----
>>
>> After setting (global-font-lock-mode -1) and reverting *Faces* restores
>> the list-faces-display as expected.
>>
>> Now C-u C-x = shows
>> ,----
>> | There are text properties here:
>> |   button               (t)
>> |   category             help-face-button
>> |   face                 bold
>> |   help-args            (bold)
>> |   read-face-name       bold
>> `----
>>
>> So When the problem occurs all text is "fontified" and faces seem to
>> be ignored.
>
> Sounds like it could be another instance of Bug#35481. Maybe you are
> enabling some minor mode which calls font-lock-add-keywords or
> similar?
>
> See https://debbugs.gnu.org/35481 and also https://debbugs.gnu.org/35044.

I've extracted one twisted test case from my .emacs and it is something
of a mystery.

;; Put this form in a file, say f.el

(eval-after-load 'gnus-sum
  '(progn
     (defadvice gnus-summary-save-article (after rmail-label-prompter-advice activate)
       (if (eq gnus-default-article-saver 'gnus-summary-save-in-rmail)
	   (message "foo")
	 (message "bar"))) ))

Then open a file which does not autoload org-mode but which can be
converted to org-mode. For example I use hyperbole's DEMO file:

emacs -Q -eval '(list-colors-display)' -l f.el ~/elisp/pkg/hyperbole/DEMO

Then with DEMO as the current buffer, do M-x org-mode

Then M-x list-colors-display shows my colours are gone.

(gnus-default-article-saver is a variable defined n gnus-art and may not
be defined when gnus-sum is loaded.)

[Unrelated notes]

1 Although this mailing list is being propagated to the usenet group, the
posts on the usenet group do not seem to make it to the mailing list.

2 Setting mail-user-agent to message-user-agent instead of
sendmail-user-agent drops all the References headers when replying to a
mail from a gnus summary buffer.

--