From cdf8394ccc4adac94aae9ac395d09eb03608ef2d Mon Sep 17 00:00:00 2001
From: Kim Kulling <kimkulling@users.noreply.github.com>
Date: Tue, 25 Jun 2024 00:05:31 +0200
Subject: [PATCH] Fix nullptr dereferencing (#5638)

- closes https://github.com/assimp/assimp/issues/5617
---
 code/AssetLib/FBX/FBXExporter.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/code/AssetLib/FBX/FBXExporter.cpp b/code/AssetLib/FBX/FBXExporter.cpp
index ae210eb1a..50ce3bc2e 100644
--- a/code/AssetLib/FBX/FBXExporter.cpp
+++ b/code/AssetLib/FBX/FBXExporter.cpp
@@ -1051,7 +1051,7 @@ aiNode* get_node_for_mesh(unsigned int meshIndex, aiNode* node)
 aiMatrix4x4 get_world_transform(const aiNode* node, const aiScene* scene)
 {
     std::vector<const aiNode*> node_chain;
-    while (node != scene->mRootNode) {
+    while (node != scene->mRootNode && node != nullptr) {
         node_chain.push_back(node);
         node = node->mParent;
     }