From 75bbeb8f691be00a47bf2eaaa828c2a4ea7200d8 Mon Sep 17 00:00:00 2001
From: Ovahlord <dreadkiller@gmx.de>
Date: Sun, 3 Feb 2019 20:51:59 +0100
Subject: [PATCH] Core/Movement: do not trigger an assert when receiving
 movement opcodes without movers (packet hack protection)

---
 src/server/game/Handlers/MovementHandler.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/server/game/Handlers/MovementHandler.cpp b/src/server/game/Handlers/MovementHandler.cpp
index 453dc261a1c..ae05ab2fc37 100644
--- a/src/server/game/Handlers/MovementHandler.cpp
+++ b/src/server/game/Handlers/MovementHandler.cpp
@@ -293,7 +293,9 @@ void WorldSession::HandleMovementOpcodes(WorldPacket& recvPacket)
 
     Unit* mover = _player->m_unitMovedByMe;
 
-    ASSERT(mover != nullptr);                      // there must always be a mover
+    // there must always be a mover
+    if (!mover)
+        return;
 
     Player* plrMover = mover->ToPlayer();