From 8ed0680bb9726a2290b1df644f46df30048fc67d Mon Sep 17 00:00:00 2001
From: UbitUmarov
Date: Wed, 6 Nov 2019 23:40:53 +0000
Subject: handle null refs on llSubStringIndex()

---
 OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs | 4 ++++
 1 file changed, 4 insertions(+)

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

diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
index 8ddd175..d4cbbce 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
@@ -5846,6 +5846,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         public LSL_Integer llSubStringIndex(string source, string pattern)
         {
             m_host.AddScriptLPS(1);
+            if (string.IsNullOrEmpty(source))
+                return -1;
+            if (string.IsNullOrEmpty(pattern))
+                return 0;
             return source.IndexOf(pattern);
         }
 
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