From ecdf8d24b85367b22ba353b4f82299d4af7f1f97 Mon Sep 17 00:00:00 2001
From: Kim Kulling <kimkulling@users.noreply.github.com>
Date: Mon, 7 Oct 2024 10:30:45 +0200
Subject: [PATCH] SplitLargeMeshes: Fix crash (#5799)

- Fix nullptr access when rootnode of the scene is a nullptr. This can happen even if the scene stores any kind of meshes. closes https://github.com/assimp/assimp/issues/5791
---
 code/SplitLargeMeshes.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/code/SplitLargeMeshes.cpp b/code/SplitLargeMeshes.cpp
index 5e21ec6..9a09316 100644
--- a/code/SplitLargeMeshes.cpp
+++ b/code/SplitLargeMeshes.cpp
@@ -113,6 +113,9 @@ void SplitLargeMeshesProcess_Triangle::SetupProperties( const Importer* pImp)
 void SplitLargeMeshesProcess_Triangle::UpdateNode(aiNode* pcNode,
     const std::vector<std::pair<aiMesh*, unsigned int> >& avList)
 {
+    if (pcNode == nullptr) {
+        return;
+    }
     // for every index in out list build a new entry
     std::vector<unsigned int> aiEntries;
     aiEntries.reserve(pcNode->mNumMeshes + 1);
-- 
2.33.0