Uh ... 'svn copy wc wc' without RA layer?

So ... it could be that it's 1:00am, but I'm having trouble with a scenario.
 See, I went off into mergeinfoless-copies land thinking that one benefit of
this (besides general correctness) was that 'svn copy wc wc' would no longer
need the RA layer. We'd just set empty mergeinfo if the copy source didn't
have mergeinfo.

But now I'm thinking about this, and I'm wondering how we know the copy
source have mergeinfo. Don't we have to ask the RA layer about this? If we
don't, and the mergeinfo for the copy source lives in some parent directory
we don't have checked out, won't we effectively lose all that mergeinfo on
the copy target when we set svn:mergeinfo=''?

Please tell me I'm underthinking this.

-- 
C. Michael Pilato <cmpilato@collab.net>
CollabNet   <>   www.collab.net   <>   Distributed Development On Demand