bug#61658: 30.0.50; server-eval-at might handle unreadable results better

[Eli Zaretskii]

> From: Sean Whitton <spwhitton@spwhitton.name>
> Cc: 61658@debbugs.gnu.org
> Date: Thu, 23 Feb 2023 10:27:11 -0700
> 
> On Thu 23 Feb 2023 at 08:24AM +02, Eli Zaretskii wrote:
> 
> > So you want server.el to catch the error and re-throw it with a
> > different signal in this particular case?  Or am I misunderstanding?
> 
> Yes, that's what I'd like to do.

But then just define-error isn't enough, is it?