bug#66326: 29.1.50; There should be a way to promote warnings to errors

[Eli Zaretskii]

> From: Spencer Baugh <sbaugh@janestreet.com>
> Cc: sbaugh@catern.com,  66326@debbugs.gnu.org
> Date: Thu, 19 Oct 2023 10:50:59 -0400
> 
> >> What is the good reason that we delay warnings?
> >
> > Because Emacs is not yet able to display stuff reliably, for example.
> > Or the display environment was not yet set up completely.
> 
> Right.  But that is not a concern for errors.

It is a concern for displaying anything and everything.

> So there's no need to do extra work to delay errors in warnings.el.

Yes, there is.

> >> But OK, attached is a new patch which adds an option to immediately
> >> raise the warnings converted into errors during startup, instead of
> >> delaying them.  So the default is to delay the error until after
> >> startup.  Does this work?
> >
> > Did you test that?  If you did, what happens with delayed warnings
> > when the new option is nil?
> 
> They continue to be delayed.  If a warning is turned into an error, the
> error is signaled by delayed-warnings-hook, run by after-init-hook.

Delayed and shown how?  Can you show a screenshot or post the contents
of the buffer with the error message?