svnsync: Error while replaying commit

I see a lot of reports of this error, but little in the way of
clear information as to what it might mean, or how to fix it:

$ svnsync sync file://`pwd`/dest
Committed revision 1.
Copied properties for revision 1.
Transmitting file data .....................
[...]
Committed revision 79.
Copied properties for revision 79.
Transmitting file data .......................
Committed revision 80.
Copied properties for revision 80.
svnsync: Error while replaying commit

Huh?

If I look at the source server log, revs 81 & 82 are "missing"
in the trunk. I imagine they are/were in a branch, which AFAIK
is no longer available. Is there any way to get around this?
Assuming that's the problem, of course.
Received on 2012-03-30 15:58:43 CEST