From 7f342374fccc4d77e545588694d61708f3b8e6ff Mon Sep 17 00:00:00 2001
From: Andrei Kortunov <andrei.kortunov@yandex.ru>
Date: Wed, 12 Aug 2020 11:16:10 +0400
Subject: [PATCH] Fix crash when using 'showscenegraph 1' console command

---
 apps/openmw/mwworld/worldimp.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/apps/openmw/mwworld/worldimp.cpp b/apps/openmw/mwworld/worldimp.cpp
index 2eec9bf0e..54dbfa7b6 100644
--- a/apps/openmw/mwworld/worldimp.cpp
+++ b/apps/openmw/mwworld/worldimp.cpp
@@ -3633,8 +3633,11 @@ namespace MWWorld
     std::string World::exportSceneGraph(const Ptr &ptr)
     {
         std::string file = mUserDataPath + "/openmw.osgt";
-        mRendering->pagingBlacklistObject(mStore.find(ptr.getCellRef().getRefId()), ptr);
-        mWorldScene->removeFromPagedRefs(ptr);
+        if (!ptr.isEmpty())
+        {
+            mRendering->pagingBlacklistObject(mStore.find(ptr.getCellRef().getRefId()), ptr);
+            mWorldScene->removeFromPagedRefs(ptr);
+        }
         mRendering->exportSceneGraph(ptr, file, "Ascii");
         return file;
     }