.

wcfs/wcfs.go

@@ -960,7 +960,7 @@ func (head *Head) bigopen(ctx context.Context, oid zodb.Oid) (_ *BigFile, err er
 		zbfSize: zbfSize,
 
 		// XXX this is needed only for head/
-		δFtail:  NewΔTailI64(),	// XXX indicate we have coverage starting from zconn.at?
+		δFtail:  NewΔTailI64(zconn.At()),
 		loading: make(map[int64]*blkLoadState),
 	}, nil
 }