2 files changed, 26 insertions, 3 deletions

diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs b/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
index 8710c3e..3d4bc3c 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
@@ -3170,6 +3170,9 @@ namespace OpenSim.Region.Framework.Scenes
 
         public void StoreUndoState(bool forGroup)
         {
+            if (ParentGroup == null || ParentGroup.Scene == null)
+                return;
+
             if (Undoing)
             {
 //                m_log.DebugFormat(
@@ -3183,9 +3186,6 @@ 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 c93562d..133fac5 100644
--- a/OpenSim/Region/Framework/Scenes/Tests/SceneObjectUndoRedoTests.cs
+++ b/OpenSim/Region/Framework/Scenes/Tests/SceneObjectUndoRedoTests.cs
@@ -103,6 +103,29 @@ namespace OpenSim.Region.Framework.Scenes.Tests
         }
 
         [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()
         {
             TestHelpers.InMethod();