From 589d845093d9a31bee24a013c19d6ff4071ba205 Mon Sep 17 00:00:00 2001
From: hondacrx <prelude_20032002@yahoo.com>
Date: Thu, 16 Dec 2021 12:43:45 -0500
Subject: [PATCH] Core/Movement: Fix assertion triggered in
 SplineChainMovementGenerator

Port From (https://github.com/TrinityCore/TrinityCore/commit/6e28ecd22ea5ba8a7a2d0b08217aa68010b1cfc4)
---
 .../Movement/Generators/SplineChainMovementGenerator.cs    | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Source/Game/Movement/Generators/SplineChainMovementGenerator.cs b/Source/Game/Movement/Generators/SplineChainMovementGenerator.cs
index 031bb60f9..8b4e49cfe 100644
--- a/Source/Game/Movement/Generators/SplineChainMovementGenerator.cs
+++ b/Source/Game/Movement/Generators/SplineChainMovementGenerator.cs
@@ -69,6 +69,13 @@ namespace Game.Movement
                 return;
             }
 
+            if (_nextIndex >= _chainSize)
+            {
+                Log.outWarn(LogFilter.Movement, $"SplineChainMovementGenerator::Initialize: couldn't initialize generator, _nextIndex is >= _chainSize ({owner.GetGUID()})");
+                _msToNext = 0;
+                return;
+            }
+
             if (_nextFirstWP != 0) // this is a resumed movegen that has to start with a partial spline
             {