From 583b28e164755633833a1bef4337323c5d2cdfd0 Mon Sep 17 00:00:00 2001
From: azv <azv@opencascade.com>
Date: Thu, 2 Apr 2015 09:24:09 +0300
Subject: [PATCH] Issue #433: Mirror constraint problem

The empty items are removed from mirroring list
---
 .../SketchSolver_ConstraintGroup.cpp             | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/SketchSolver/SketchSolver_ConstraintGroup.cpp b/src/SketchSolver/SketchSolver_ConstraintGroup.cpp
index f54067afa..6462775d4 100644
--- a/src/SketchSolver/SketchSolver_ConstraintGroup.cpp
+++ b/src/SketchSolver/SketchSolver_ConstraintGroup.cpp
@@ -662,6 +662,22 @@ bool SketchSolver_ConstraintGroup::changeMirrorConstraint(
 
   std::list<ObjectPtr> aBaseList = aBaseRefList->list();
   std::list<ObjectPtr> aMirroredList = aMirroredRefList->list();
+  // remove all empty items
+  std::list<ObjectPtr>::iterator anIt = aBaseList.begin();
+  std::list<ObjectPtr>::iterator aTmpIt;
+  while (anIt != aBaseList.end()) {
+    aTmpIt = anIt;
+    anIt++;
+    if (!(*aTmpIt))
+      aBaseList.erase(aTmpIt);
+  }
+  anIt = aMirroredList.begin();
+  while (anIt != aMirroredList.end()) {
+    aTmpIt = anIt;
+    anIt++;
+    if (!(*aTmpIt))
+      aMirroredList.erase(aTmpIt);
+  }
   if (aBaseList.empty() || aBaseList.size() != aMirroredList.size())
     return false;
 
-- 
2.39.2