.

wcfs/δbtail.go

@@ -534,8 +534,10 @@ func diffT(ctx context.Context, a, b *Tree, δZTC SetOid, trackIdx map[zodb.Oid]
 	aChildren := map[zodb.Oid]Node{}
 	for _, __ := range av {
 		child := __.Child()
-		if δZTC.Has(child.POid()) {
-			aChildren[child.POid()] = child // InvalidOid = embedded bucket
+		coid  := child.POid()
+		if δZTC.Has(coid) ||
+		   (len(av) == 1 && coid == zodb.InvalidOid) /* embedded bucket */ {
+			aChildren[coid] = child
 		}
 	}
 	fmt.Printf("  aChildren: %v\n", aChildren)