From cec8e6d0f7d073d69166a7bc3594772ae51820e2 Mon Sep 17 00:00:00 2001
From: Justin Clark-Casey (justincc)
Date: Tue, 9 Jul 2013 23:52:47 +0100
Subject: If a sensor is in an attachment, avoid throwing an exception if the
 attachee is removed from the scene before we try to retrieve them.

---
 .../Shared/Api/Implementation/Plugins/SensorRepeat.cs          | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'OpenSim/Region/ScriptEngine/Shared')

diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/SensorRepeat.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/SensorRepeat.cs
index 88ab515..6e74227 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/SensorRepeat.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/SensorRepeat.cs
@@ -353,6 +353,11 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api.Plugins
                 // Position of a sensor in a child prim attached to an avatar
                 // will be still wrong. 
                 ScenePresence avatar = m_CmdManager.m_ScriptEngine.World.GetScenePresence(SensePoint.ParentGroup.AttachedAvatar);
+
+                // Don't proceed if the avatar for this attachment has since been removed from the scene.
+                if (avatar == null)
+                    return sensedEntities;
+
                 q = avatar.GetWorldRotation() * q;
             }
 
@@ -480,6 +485,11 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api.Plugins
                 // Position of a sensor in a child prim attached to an avatar
                 // will be still wrong. 
                 ScenePresence avatar = m_CmdManager.m_ScriptEngine.World.GetScenePresence(SensePoint.ParentGroup.AttachedAvatar);
+
+                // Don't proceed if the avatar for this attachment has since been removed from the scene.
+                if (avatar == null)
+                    return sensedEntities;
+
                 q = avatar.GetWorldRotation() * q;
             }
 
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