From f175052b8079da90b68d1c8667e6d3fdf06548f4 Mon Sep 17 00:00:00 2001
From: azv <azv@opencascade.com>
Date: Mon, 17 Aug 2015 15:40:20 +0300
Subject: [PATCH] Avoid removing distance entity from list of SolveSpace
 entities (issue #848)

---
 src/SketchSolver/SketchSolver_Storage.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/SketchSolver/SketchSolver_Storage.cpp b/src/SketchSolver/SketchSolver_Storage.cpp
index 2f2700fd2..a716b6859 100644
--- a/src/SketchSolver/SketchSolver_Storage.cpp
+++ b/src/SketchSolver/SketchSolver_Storage.cpp
@@ -215,8 +215,10 @@ void SketchSolver_Storage::removeUnusedEntities()
         int aPos = Search(aSubs[i], myEntities);
         if (aPos >= 0 && aPos < (int)myEntities.size()) {
           for (int j = 0; j < 4; j++)
-            if (myEntities[aPos].point[j] != 0)
+            if (myEntities[aPos].point[j] != SLVS_E_UNKNOWN)
               anUnusedEntities.erase(myEntities[aPos].point[j]);
+          if (myEntities[aPos].distance != SLVS_E_UNKNOWN)
+            anUnusedEntities.erase(myEntities[aPos].distance);
         }
       }
     }
-- 
2.39.2