Avoid a possible race condition where the XEngine script compile thread could complete but see OnRezScript() insert a new job and complete before it set m_CurrentCompile = null

If the above happened, it would mean the new script would not compile until some  script was added for compilation.

1 files changed, 8 insertions, 0 deletions

diff --git a/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs b/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
index 7ff82e6..ccd5d99 100644
--- a/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
+++ b/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
@@ -1101,7 +1101,15 @@ namespace OpenSim.Region.ScriptEngine.XEngine
                 // due to a race condition
                 //
                 lock (m_CompileQueue)
+                {
                     m_CurrentCompile = null;
+
+                    // This is to avoid a situation where the m_CompileQueue while loop above could complete but 
+                    // OnRezScript() place a new script on the queue and check m_CurrentCompile = null before we hit 
+                    // this section.
+                    if (m_CompileQueue.Count > 0)
+                        m_CurrentCompile = m_ThreadPool.QueueWorkItem(DoOnRezScriptQueue, null);
+                }
             }
 
             return null;