From 5baba374147de5f701a3685c1dc836e239214ea2 Mon Sep 17 00:00:00 2001
From: Kim Kulling <kim.kulling@googlemail.com>
Date: Wed, 24 Jan 2018 21:43:36 +0100
Subject: [PATCH] closes https://github.com/assimp/assimp/issues/1728: check if
 mesh is a null instance before dereferencing it.

---
 code/XFileImporter.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/code/XFileImporter.cpp b/code/XFileImporter.cpp
index 75be90310..6d1316194 100644
--- a/code/XFileImporter.cpp
+++ b/code/XFileImporter.cpp
@@ -246,6 +246,10 @@ void XFileImporter::CreateMeshes( aiScene* pScene, aiNode* pNode, const std::vec
     for( unsigned int a = 0; a < pMeshes.size(); a++)
     {
         XFile::Mesh* sourceMesh = pMeshes[a];
+        if ( nullptr == sourceMesh ) {
+            continue;
+        }
+
         // first convert its materials so that we can find them with their index afterwards
         ConvertMaterials( pScene, sourceMesh->mMaterials);