From d5c999553ec7c8b5acc526748e877db045d1c967 Mon Sep 17 00:00:00 2001
From: "Justin Clark-Casey (justincc)" <jjustincc@googlemail.com>
Date: Wed, 26 Sep 2012 23:31:10 +0100
Subject: [PATCH] Don't store undo states if a scene object is manipulated when
 it is not in a scene.

Adds regression test for this.
---
 .../Framework/Scenes/SceneObjectPart.cs       |  6 ++---
 .../Scenes/Tests/SceneObjectUndoRedoTests.cs  | 23 +++++++++++++++++++
 2 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs b/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
index a707f135d6..49f55b1379 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
@@ -3150,6 +3150,9 @@ namespace OpenSim.Region.Framework.Scenes
 
         public void StoreUndoState(bool forGroup)
         {
+            if (ParentGroup == null || ParentGroup.Scene == null)
+                return;
+
             if (Undoing)
             {
 //                m_log.DebugFormat(
@@ -3163,9 +3166,6 @@ namespace OpenSim.Region.Framework.Scenes
                 return;
             }
 
-            if (ParentGroup == null)
-                return;
-
             lock (m_undo)
             {
                 if (m_undo.Count > 0)
diff --git a/OpenSim/Region/Framework/Scenes/Tests/SceneObjectUndoRedoTests.cs b/OpenSim/Region/Framework/Scenes/Tests/SceneObjectUndoRedoTests.cs
index c93562d500..133fac573a 100644
--- a/OpenSim/Region/Framework/Scenes/Tests/SceneObjectUndoRedoTests.cs
+++ b/OpenSim/Region/Framework/Scenes/Tests/SceneObjectUndoRedoTests.cs
@@ -102,6 +102,29 @@ namespace OpenSim.Region.Framework.Scenes.Tests
             Assert.That(g1.GroupScale, Is.EqualTo(secondSize));
         }
 
+        [Test]
+        public void TestNoUndoOnObjectsNotInScene()
+        {
+            TestHelpers.InMethod();
+
+            Vector3 firstSize = new Vector3(2, 3, 4);
+            Vector3 secondSize = new Vector3(5, 6, 7);
+            Vector3 thirdSize = new Vector3(8, 9, 10);
+            Vector3 fourthSize = new Vector3(11, 12, 13);
+
+            Scene scene = new SceneHelpers().SetupScene();
+            SceneObjectGroup g1 = SceneHelpers.CreateSceneObject(1, TestHelpers.ParseTail(0x1));
+
+            g1.GroupResize(firstSize);
+            g1.GroupResize(secondSize);
+
+            Assert.That(g1.RootPart.UndoCount, Is.EqualTo(0));
+
+            g1.RootPart.Undo();
+
+            Assert.That(g1.GroupScale, Is.EqualTo(secondSize));
+        }
+
         [Test]
         public void TestUndoBeyondAvailable()
         {