From 27e87b8f48efe91f73b72f59c1ede36bbaf1de7c Mon Sep 17 00:00:00 2001
From: mpv <mpv@opencascade.com>
Date: Thu, 2 Jul 2015 12:05:28 +0300
Subject: [PATCH] Fix for issue #712

---
 src/Model/Model_AttributeRefList.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Model/Model_AttributeRefList.cpp b/src/Model/Model_AttributeRefList.cpp
index d8b6fc005..534e52750 100644
--- a/src/Model/Model_AttributeRefList.cpp
+++ b/src/Model/Model_AttributeRefList.cpp
@@ -95,7 +95,7 @@ bool Model_AttributeRefList::isInList(const ObjectPtr& theObj)
       owner()->document());
   if (aDoc) {
     std::shared_ptr<Model_Data> aData = std::dynamic_pointer_cast<Model_Data>(theObj->data());
-    if (aData.get()) {
+    if (aData.get() && aData->isValid()) {
       TDF_Label anObjLab = aData->label().Father();
       const TDF_LabelList& aList = myRef->List();
       for (TDF_ListIteratorOfLabelList aLIter(aList); aLIter.More(); aLIter.Next()) {
-- 
2.39.2