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

[Eli Zaretskii]

> From: Sean Whitton <spwhitton@spwhitton.name>
> Date: Mon, 20 Feb 2023 09:25:34 -0700
> 
> I use server-eval-at to call a function, in another daemon, which
> returns a buffer.  So, server-eval-at tries (read "#<buffer *foo*>")
> which of course fails, and indeed signals an error.
> 
> I wonder if server-eval-at should return a special value to indicate
> that the remote computation returned something that is not readably
> printable?  Or signal a particular error, which the caller might catch?

Why can't you make that function return something more sensible?  Or
even just nil?