1 files changed, 2 insertions, 0 deletions
diff --git a/boost/python/refcount.hpp b/boost/python/refcount.hpp
index 5ba5433c22..aa6aa5dbb6 100755
--- a/boost/python/refcount.hpp
+++ b/boost/python/refcount.hpp
@@ -27,12 +27,14 @@ inline T* xincref(T* p)
 template <class T>
 inline void decref(T* p)
 {
+    assert( Py_REFCNT(python::upcast<PyObject>(p)) > 0 );
     Py_DECREF(python::upcast<PyObject>(p));
 }
 
 template <class T>
 inline void xdecref(T* p)
 {
+    assert( !p || Py_REFCNT(python::upcast<PyObject>(p)) > 0 );
     Py_XDECREF(python::upcast<PyObject>(p));
 }