bug#17893: 24.4.50; (error "Marker does not point anywhere")

[Eli Zaretskii]

> From: Stefan Monnier <monnier@IRO.UMontreal.CA>
> Cc: charles@aurox.ch (Charles A. Roelli), 17893@debbugs.gnu.org
> Date: Sat, 25 Nov 2017 11:48:19 -0500
> 
> > What is missing is a way of methodically walking all the markers
> > reachable from the cloned buffer's local variables, and changing each
> > marker to point to the cloned buffer instead of the parent buffer.
> 
> I think this is equivalent to the halting problem.

Yes, I know.  But that doesn't mean it is, and certainly not that the
problem couldn't be described.