.

wcfs/δbtail_test.go

@@ -609,6 +609,8 @@ func xverifyΔBTail1(t *testing.T, subj string, db *zodb.DB, treeRoot zodb.Oid,
 	}
 
 	// XXX verify δbtail index consistency against @at2
+	// XXX verify that removed keys remain in trackedIdx (holes), so that e.g.
+	// track [k]; k:a->b; k:b->ø; k:ø->c is not missed
 
 
 	// assert δB.ByRoot == {treeRoot -> ...}  if δTok != ø