.

wcfs/internal/δbtree/δbtail.go

@@ -80,6 +80,7 @@ func (δB *ΔBTail) Update(δZ *zodb.EventCommit) {
 		return
 
 	zconnNew = db.Open(δZ.rev)
+	defer(zconnNew.close)
 
 	for root, δZ in δbZ:
 		toposort(δZ)
@@ -96,6 +97,11 @@ func (δB *ΔBTail) Update(δZ *zodb.EventCommit) {
 */
 }
 
+// XXX -> Get(root, key, at) -> (valueOid, rev) ?
 func (δB *ΔBTail) LastRevOf(root Tree, key Key, at zodb.Tid) zodb.Tid {
+	panic("TODO") // XXX return 0 as stub?
+}
+
+func (δB *ΔBTail) ForgetPast(revCut zodb.Tid) {
 	panic("TODO")
 }