bpo-40998: Fix a refleak in create_filter() (GH-23365)
diff --git a/Python/_warnings.c b/Python/_warnings.c
index 8d33fbe..313420c 100644
--- a/Python/_warnings.c
+++ b/Python/_warnings.c
@@ -69,12 +69,14 @@ create_filter(PyObject *category, _Py_Identifier *id, const char *modname)
return NULL;
}
} else {
- modname_obj = Py_None;
+ modname_obj = Py_NewRef(Py_None);
}
/* This assumes the line number is zero for now. */
- return PyTuple_Pack(5, action_str, Py_None,
- category, modname_obj, _PyLong_GetZero());
+ PyObject *filter = PyTuple_Pack(5, action_str, Py_None,
+ category, modname_obj, _PyLong_GetZero());
+ Py_DECREF(modname_obj);
+ return filter;
}
#endif