.

wcfs/δbtail.go

@@ -482,13 +482,13 @@ func diffT(ctx context.Context, a, b *Tree, δZTC SetOid) (δ map[Key]Value, err
 					return nil, fmt.Errorf("BUG or btree corrupt: [%v] has " +
 							"duplicate entries: %v, %v", k, vprev, v)
 				}
-				if v != VDEL {
-					δ[k] =v
-				}
+				delete(δ, k)
 			}
 		}
 
 		// XXX process keys from δ outside of already tracked nodes
+		// XXX only deleted keys - no - delete can be from untracked
+		// node and on tracked it is seen as addition
 	}
 
 	return δ, nil