From 3fd1827084c1119a3f6be77eb61f03af54001447 Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@e8eeb9e2-ec13-0410-a4a9-efa5cf37419d>
Date: Mon, 2 Jan 2012 14:03:55 +0000
Subject: [PATCH] + check for null shape before calling BRep_Tool::IsClosed

git-svn-id: https://free-cad.svn.sourceforge.net/svnroot/free-cad/trunk@5379 e8eeb9e2-ec13-0410-a4a9-efa5cf37419d
---
 src/Mod/Part/App/TopoShapeEdgePyImp.cpp | 4 +++-
 src/Mod/Part/App/TopoShapePyImp.cpp     | 2 ++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/Mod/Part/App/TopoShapeEdgePyImp.cpp b/src/Mod/Part/App/TopoShapeEdgePyImp.cpp
index ad7791ede..b69049e6e 100644
--- a/src/Mod/Part/App/TopoShapeEdgePyImp.cpp
+++ b/src/Mod/Part/App/TopoShapeEdgePyImp.cpp
@@ -123,7 +123,7 @@ int TopoShapeEdgePy::PyInit(PyObject* args, PyObject* /*kwd*/)
     PyErr_Clear();
     if (PyArg_ParseTuple(args, "O!", &(Part::TopoShapePy::Type), &pcObj)) {
         TopoShape* shape = static_cast<TopoShapePy*>(pcObj)->getTopoShapePtr();
-        if (shape && shape->_Shape.ShapeType() == TopAbs_EDGE) {
+        if (shape && !shape->_Shape.IsNull() && shape->_Shape.ShapeType() == TopAbs_EDGE) {
             this->getTopoShapePtr()->_Shape = shape->_Shape;
             return 0;
         }
@@ -507,6 +507,8 @@ Py::Object TopoShapeEdgePy::getCenterOfMass(void) const
 
 Py::Boolean TopoShapeEdgePy::getClosed(void) const
 {
+    if (getTopoShapePtr()->_Shape.IsNull())
+        throw Py::Exception("Cannot determine the 'Closed'' flag of an empty shape");
     Standard_Boolean ok = BRep_Tool::IsClosed(getTopoShapePtr()->_Shape);
     return Py::Boolean(ok ? true : false);
 }
diff --git a/src/Mod/Part/App/TopoShapePyImp.cpp b/src/Mod/Part/App/TopoShapePyImp.cpp
index 37b7c18b8..598e7ad8b 100644
--- a/src/Mod/Part/App/TopoShapePyImp.cpp
+++ b/src/Mod/Part/App/TopoShapePyImp.cpp
@@ -1030,6 +1030,8 @@ PyObject*  TopoShapePy::isClosed(PyObject *args)
     if (!PyArg_ParseTuple(args, ""))
         return NULL;
     try {
+        if (getTopoShapePtr()->_Shape.IsNull())
+            Standard_Failure::Raise("Cannot determine the 'Closed'' flag of an empty shape");
         return Py_BuildValue("O", (getTopoShapePtr()->isClosed() ? Py_True : Py_False));
     }
     catch (...) {