From 6dc51244491d9a127b22f2af96786b12190304af Mon Sep 17 00:00:00 2001
From: asl <asl@opencascade.com>
Date: Fri, 10 Nov 2017 13:21:34 +0300
Subject: [PATCH] patch for crash

---
 src/CurveCreator/CurveCreator_Section.cxx | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/src/CurveCreator/CurveCreator_Section.cxx b/src/CurveCreator/CurveCreator_Section.cxx
index 2b9beda57..0052bcbec 100644
--- a/src/CurveCreator/CurveCreator_Section.cxx
+++ b/src/CurveCreator/CurveCreator_Section.cxx
@@ -35,12 +35,16 @@ Handle(TColgp_HArray1OfPnt) CurveCreator_Section::GetDifferentPoints( int theDim
   Handle(TColgp_HArray1OfPnt) points;
 
   std::vector<gp_Pnt> aTmpPoints;
-  CurveCreator::Coordinates::const_iterator aPIt = myPoints.begin();
-  CurveCreator::Coordinates::const_iterator aPItLast = myPoints.end();
-  const gp_Pnt aFirstPoint(
-    *aPIt, *(aPIt + 1), (theDimension == 2) ? 0 : *(aPIt + 2));
-  gp_Pnt aPoint = aFirstPoint;
-  aTmpPoints.push_back(aPoint);
+
+  if( myPoints.size() > 0 )
+  {
+    CurveCreator::Coordinates::const_iterator aPIt = myPoints.begin();
+    CurveCreator::Coordinates::const_iterator aPItLast = myPoints.end();
+    const gp_Pnt aFirstPoint(
+      *aPIt, *(aPIt + 1), (theDimension == 2) ? 0 : *(aPIt + 2));
+    gp_Pnt aPoint = aFirstPoint;
+    aTmpPoints.push_back(aPoint);
+  }
 
   for (; aPIt != aPItLast; aPIt += theDimension)
   {