From 23924c58707ee2a2aef039163edbbcc5d0746508 Mon Sep 17 00:00:00 2001
From: Ciaran McCreesh <ciaran.mccreesh@googlemail.com>
Date: Sat, 16 Jul 2011 23:51:39 +0100
Subject: Check for null explicitly

---
 python/dep_spec_TEST.py    | 2 ++
 python/slot_requirement.cc | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/python/dep_spec_TEST.py b/python/dep_spec_TEST.py
index fb05ba232..9b28d2828 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 09453d968..6cde77286 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());
-- 
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