Submit a new PR describing the new problem.. Request that the old one
be closed in the new one.

maximum entropy writes:
> I submitted a PR a few days ago, and after some more experimentation
> and a rebuild of my system the perceived symptoms have changed.  I
> believe the original PR may have been in error, in that something I
> thought was related to the problem at hand has actually turned out to
> be a red herring.  How do I go about requesting that the original PR
> be closed?
> 
> The PR in question is #4002 in category port-vax.
> 
> Cheers,
> entropy
> 
> --
> entropy -- it's not just a good idea, it's the second law.
> 
> This message may refer to a product containing software developed by
> Christopher G. Demetriou for the NetBSD Project.