Compaction returns success, but files are never compacted

From Alk:

And actually memcached logs have this:

Fri Jun 6 18:14:45.752964 PDT 3: (saslbucket) Warning: failed to compact database with name=/data/saslbucket/928.couch.1 error=no such file errno=none

But notably either it's not returning failure back to ns_server or ns_server doesn't care. Added to my todo list that I need to check if ns_server isn't doing something right.