From 374b4dd23d6d35b4ce83be2bc26690a2c2cdf581 Mon Sep 17 00:00:00 2001
From: mpv <mpv@opencascade.com>
Date: Fri, 3 Jul 2015 16:40:52 +0300
Subject: [PATCH] Fix for 671: if it is not case, do not use it as reference to
 objects

---
 src/Model/Model_Data.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/Model/Model_Data.cpp b/src/Model/Model_Data.cpp
index 36f012028..347a21820 100644
--- a/src/Model/Model_Data.cpp
+++ b/src/Model/Model_Data.cpp
@@ -378,12 +378,22 @@ void Model_Data::updateConcealmentFlag()
   }
 }
 
+#include <Model_Validator.h>
+
 void Model_Data::referencesToObjects(
   std::list<std::pair<std::string, std::list<ObjectPtr> > >& theRefs)
 {
+  static Model_ValidatorsFactory* aValidators = 
+    static_cast<Model_ValidatorsFactory*>(ModelAPI_Session::get()->validators());
+  FeaturePtr aMyFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(myObject);
+
   std::map<std::string, std::shared_ptr<ModelAPI_Attribute> >::iterator anAttr = myAttrs.begin();
   std::list<ObjectPtr> aReferenced; // not inside of cycle to avoid excess memory menagement
   for(; anAttr != myAttrs.end(); anAttr++) {
+    // skip not-case attributres, that really may refer to anything not-used (issue 671)
+    if (aMyFeature.get() && !aValidators->isCase(aMyFeature, anAttr->second->id()))
+      continue;
+
     std::string aType = anAttr->second->attributeType();
     if (aType == ModelAPI_AttributeReference::typeId()) { // reference to object
       std::shared_ptr<ModelAPI_AttributeReference> aRef = std::dynamic_pointer_cast<
-- 
2.39.2