.

wcfs/internal/xbtree/δbtail.go

@@ -781,7 +781,6 @@ func (δTtail *_ΔTtail) forgetPast(revCut zodb.Tid) {
 // at  must ∈ (tail, head]
 func (δBtail *ΔBtail) GetAt(root zodb.Oid, key Key, at zodb.Tid) (value Value, rev zodb.Tid, valueExact, revExact bool, err error) {
 	defer xerr.Contextf(&err, "δBtail: root<%s>: get %d @%s", root, key, at)
-	// XXX key not tracked		-> panic
 
 	tail := δBtail.Tail()
 	head := δBtail.Head()
@@ -805,6 +804,7 @@ func (δBtail *ΔBtail) GetAt(root zodb.Oid, key Key, at zodb.Tid) (value Value,
 	if δTtail == nil {
 		panicf("δBtail: root<%s> not tracked", root)
 	}
+	// TODO key not tracked	-> panic  (check key ∈ lastRevOf  -- see vvv)
 
 	// TODO -> index lastRevOf(key) | linear scan ↓ looking for change ≤ at
 	for i := len(δTtail.vδT)-1; i >= 0; i-- {