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bug#50785: 28.0.50; error doesn't use help-key-binding face from substit
From: |
Lars Ingebrigtsen |
Subject: |
bug#50785: 28.0.50; error doesn't use help-key-binding face from substitute-command-keys |
Date: |
Mon, 29 Aug 2022 18:29:37 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) |
Lars Ingebrigtsen <larsi@gnus.org> writes:
> Hm... is `error' stripping text properties before displaying, by any
> chance? If so, is there any particular reason why that would make sense
> in general? Hm... perhaps the idea is that `error' is used in
> low-level circumstances, so we don't want to rely on faces etc actually
> working?
>
> Anybody know?
The error message are output (by default) by print_error_message. It
simply does `princ' on the string with a PRINTCHARFUN of t, which is the
minibuffer. And if you do that, then you lose the text properties:
(defun foo2 ()
(interactive)
(princ (substitute-command-keys "Use \\[next-line]") t))
We probably don't want to change something as fundamental as that, so if
we want to fix this, we have to change print_error_message to just call
Fmessage instead, I guess?
- bug#50785: 28.0.50; error doesn't use help-key-binding face from substitute-command-keys,
Lars Ingebrigtsen <=