From 5a3401b69f0c3e7ba27aa96481e32b2618b7827e Mon Sep 17 00:00:00 2001
From: Kim Kulling <kimkulling@users.noreply.github.com>
Date: Tue, 2 Nov 2021 10:38:38 +0100
Subject: [PATCH] Update D3MFOpcPackage.cpp

- Log an error in case of a nullptr-exception in reading out the 3MF-Archive
- closes https://github.com/assimp/assimp/issues/4153
---
 code/AssetLib/3MF/D3MFOpcPackage.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/code/AssetLib/3MF/D3MFOpcPackage.cpp b/code/AssetLib/3MF/D3MFOpcPackage.cpp
index ac5b91e67..8d51a7417 100644
--- a/code/AssetLib/3MF/D3MFOpcPackage.cpp
+++ b/code/AssetLib/3MF/D3MFOpcPackage.cpp
@@ -149,7 +149,7 @@ D3MFOpcPackage::D3MFOpcPackage(IOSystem *pIOHandler, const std::string &rFile) :
 
             IOStream *fileStream = mZipArchive->Open(file.c_str());
             if (nullptr == fileStream) {
-                ai_assert(fileStream != nullptr);
+                ASSIMP_LOG_ERROR("Filestream is nullptr.");
                 continue;
             }