From e8fca89a2c894164fc3800714eae00b3bc895231 Mon Sep 17 00:00:00 2001
From: Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
Date: Fri, 19 Jun 2015 19:39:33 +0200
Subject: [PATCH] fix dereference of a deleted pointer

---
 common/geometry/shape_poly_set.cpp | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/common/geometry/shape_poly_set.cpp b/common/geometry/shape_poly_set.cpp
index fdf43f457e..5bebf6faec 100644
--- a/common/geometry/shape_poly_set.cpp
+++ b/common/geometry/shape_poly_set.cpp
@@ -447,16 +447,19 @@ void SHAPE_POLY_SET::fractureSingle( ClipperLib::Paths& paths )
     paths.clear();
     Path newPath;
     newPath.push_back(prev);
-    FractureEdge *e;
+    FractureEdge *e, *e_next;
     IntPoint p;
 
-    for( e = root; e->m_next != root; e=e->m_next)
-    {
+    e = root;
+
+    do {
         p = e->m_p1;
         newPath.push_back(p);
         prev = p;
+        e_next = e->m_next;
         delete e;
-    }
+        e = e_next;
+    } while(e->m_next != root);
 
     p = e->m_p1;