Re: Why does signaling an error not call set-message-function?

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: Mario Lang <mlang@blind.guru>,  emacs-devel@gnu.org
> Date: Tue, 05 Apr 2022 09:14:58 -0400
> 
> > AFAIR, the set-message-function feature is explicitly for controlling
> > the output that goes via calls to 'message'.  Maybe we should
> > emphasize this in the doc string.
> 
> OTOH which echo-area message goes through `message` and which goes
> through some lower-level C function is largely an implementation detail
> (e.g. in order to know that uncaught errors get displayed without going
> through `message` the user has to read the C code, AFAICT), so I think
> it makes sense to try and make sure we go through `set-message-function`
> whenever possible.

But not when we signal an error, surely?