From 324c2faf957b47d83ffd125eb21855261abab544 Mon Sep 17 00:00:00 2001
From: Azaezel <quillus@hotmail.com>
Date: Mon, 12 Feb 2018 11:48:13 -0600
Subject: [PATCH] don't try to physically interact with a prefab with invalid
 entries

---
 Engine/source/T3D/prefab.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Engine/source/T3D/prefab.cpp b/Engine/source/T3D/prefab.cpp
index 6d357565f..6d32e2fd6 100644
--- a/Engine/source/T3D/prefab.cpp
+++ b/Engine/source/T3D/prefab.cpp
@@ -528,6 +528,11 @@ bool Prefab::isValidChild( SimObject *simobj, bool logWarnings )
 bool Prefab::buildPolyList(PolyListContext context, AbstractPolyList* polyList, const Box3F &box, const SphereF& sphere)
 {
    Vector<SceneObject*> foundObjects;
+   if (mChildGroup.isNull() || mChildGroup->empty())
+   {
+	   Con::warnf("Bad Prefab Config! %s has no valid entries!", getName());
+	   return false;
+   }
    mChildGroup->findObjectByType(foundObjects);
 
    for (S32 i = 0; i < foundObjects.size(); i++)