From 9fcabdbcf7d88029e20d9a6876b8323b2c3c6c0c Mon Sep 17 00:00:00 2001
From: mpv <mpv@opencascade.com>
Date: Thu, 23 Jun 2016 19:36:39 +0300
Subject: [PATCH] Fix for crash on changing of creation modes or already
 created arc

---
 src/ModelAPI/ModelAPI_Tools.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/ModelAPI/ModelAPI_Tools.cpp b/src/ModelAPI/ModelAPI_Tools.cpp
index 8d0b8f018..7a7bbecb7 100755
--- a/src/ModelAPI/ModelAPI_Tools.cpp
+++ b/src/ModelAPI/ModelAPI_Tools.cpp
@@ -359,6 +359,8 @@ bool hasSubResults(const ResultPtr& theResult)
 
 void allResults(const FeaturePtr& theFeature, std::list<ResultPtr>& theResults)
 {
+  if (!theFeature.get()) // safety: for empty feature no results
+    return;
   const std::list<std::shared_ptr<ModelAPI_Result> >& aResults = theFeature->results();
   std::list<std::shared_ptr<ModelAPI_Result> >::const_iterator aRIter = aResults.begin();
   for (; aRIter != aResults.cend(); aRIter++) {
-- 
2.39.2