From 3e040d66889102fcdb0320ff1abcc64d08715be3 Mon Sep 17 00:00:00 2001
From: hondacrx <prelude_20032002@yahoo.com>
Date: Wed, 29 Sep 2021 19:25:46 -0400
Subject: [PATCH] Core/Movement: shield ChaseMovementGenerator against a
 potential crash

Port From (https://github.com/TrinityCore/TrinityCore/commit/6d9e544c2072b6fba2bf978066edbd3f5c519034)
---
 .../Movement/Generators/ChaseMovementGenerator.cs     | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/Source/Game/Movement/Generators/ChaseMovementGenerator.cs b/Source/Game/Movement/Generators/ChaseMovementGenerator.cs
index 7bba568b9..717f81a0e 100644
--- a/Source/Game/Movement/Generators/ChaseMovementGenerator.cs
+++ b/Source/Game/Movement/Generators/ChaseMovementGenerator.cs
@@ -223,7 +223,11 @@ namespace Game.Movement
             if (target.GetMotionMaster().GetCurrentMovementGeneratorType() != MovementGeneratorType.Chase)
                 return false;
 
-            return ((ChaseMovementGenerator)target.GetMotionMaster().GetCurrentMovementGenerator())._abstractFollower.GetTarget() == owner;
+            ChaseMovementGenerator movement = target.GetMotionMaster().GetCurrentMovementGenerator() as ChaseMovementGenerator;
+            if (movement != null)
+                return movement.GetTarget() == owner;
+
+            return false;
         }
 
         static bool PositionOkay(Unit owner, Unit target, float? minDistance, float? maxDistance, ChaseAngle? angle)
@@ -245,5 +249,10 @@ namespace Game.Movement
             if (creatureOwner.IsAIEnabled && creatureOwner.GetAI() != null)
                 creatureOwner.GetAI().MovementInform(MovementGeneratorType.Chase, (uint)target.GetGUID().GetCounter());
         }
+
+        public Unit GetTarget()
+        {
+            return _abstractFollower.GetTarget();
+        }
     }
 }