Check for null explicitly

2 files changed, 5 insertions, 0 deletions

diff --git a/python/dep_spec_TEST.py b/python/dep_spec_TEST.py
index fb05ba2..9b28d28 100755
--- a/python/dep_spec_TEST.py
+++ b/python/dep_spec_TEST.py
@@ -63,6 +63,8 @@ class TestCase_1_DepSpecs(unittest.TestCase):
         self.assert_(isinstance(self.pds.slot_requirement, SlotExactRequirement))
         self.assertEqual(str(self.pds.slot_requirement.slot), "100")
 
+        self.assertEqual(self.pds2.slot_requirement, None)
+
     def test_05_package(self):
         self.get_depspecs()
         self.assertEqual(str(self.pds.package), "foo/bar")
diff --git a/python/slot_requirement.cc b/python/slot_requirement.cc
index 09453d9..6cde772 100644
--- a/python/slot_requirement.cc
+++ b/python/slot_requirement.cc
@@ -72,6 +72,9 @@ namespace
         static PyObject *
         convert(const std::shared_ptr<const SlotRequirement> & m)
         {
+            if (! m)
+                return Py_None;
+
             SlotRequirementSptrToPythonVisitor v(m);
             m->accept(v);
             return bp::incref(v.obj.ptr());