.

wcfs/δbtail.go

@@ -520,6 +520,8 @@ func diffT(ctx context.Context, a, b *Tree, δZTC SetOid, trackIdx map[zodb.Oid]
 		defer b.PDeactivate()
 		bv  = b.Entryv() // key↑
 	}
+	fmt.Printf("  av: %s\n", strVTreeEntry(av))
+	fmt.Printf("  bv: %v\n", strVTreeEntry(bv))
 
 	δ = map[Key]ΔValue{}
 
@@ -995,3 +997,22 @@ func δassertSlice(δ interface { Head() zodb.Tid; Tail() zodb.Tid }, lo, hi zod
 		panicf("invalid slice: (%s, %s];  (tail, head] = (%s, %s]", lo, hi, tail, head)
 	}
 }
+
+
+func strVTreeEntry(v []TreeEntry) string {
+	s := ""
+	for _, e := range v {
+		if s != "" {
+			s += " "
+		}
+		c := e.Child()
+		ckind := "?"
+		switch c.(type) {
+		case *Tree:   ckind = "T"
+		case *Bucket: ckind = "B"
+		}
+
+		s += fmt.Sprintf("%v %s%s", e.Key(), ckind, c.POid())
+	}
+	return s
+}