From 1241752b9419f118d52229da9ee354cf61e8b551 Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Mon, 22 Feb 2021 17:31:25 +0100
Subject: [PATCH] App: [skip ci] check object status before accessing back
 links

---
 src/App/PropertyLinks.cpp | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/App/PropertyLinks.cpp b/src/App/PropertyLinks.cpp
index c151d2b4eb..44b79a607c 100644
--- a/src/App/PropertyLinks.cpp
+++ b/src/App/PropertyLinks.cpp
@@ -4618,10 +4618,14 @@ void PropertyXLinkContainer::clearDeps() {
     auto owner = dynamic_cast<App::DocumentObject*>(getContainer());
     if(!owner || !owner->getNameInDocument())
         return;
-    for(auto obj : _Deps) {
-        if(obj && obj->getNameInDocument() && obj->getDocument()==owner->getDocument())
-            obj->_removeBackLink(owner);
+#ifndef USE_OLD_DAG
+    if (!owner->testStatus(ObjectStatus::Destroy)) {
+        for(auto obj : _Deps) {
+            if(obj && obj->getNameInDocument() && obj->getDocument()==owner->getDocument())
+                obj->_removeBackLink(owner);
+        }
     }
+#endif
     _Deps.clear();
     _XLinks.clear();
     _LinkRestored = false;