From ec862b907aff99a4f256b946764f349f4d1d0c5c Mon Sep 17 00:00:00 2001
From: Armin Rigo <arigo@tunes.org>
Date: Sat, 24 Sep 2005 22:58:41 +0000
Subject: [PATCH] (pedronis, arigo) segfault when a class contain a non-list
 value in the (undocumented) special attribute __slotnames__.

---
 Objects/typeobject.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Objects/typeobject.c b/Objects/typeobject.c
index 41488a4a18..88c4a15d67 100644
--- a/Objects/typeobject.c
+++ b/Objects/typeobject.c
@@ -2522,7 +2522,7 @@ slotnames(PyObject *cls)
 
 	clsdict = ((PyTypeObject *)cls)->tp_dict;
 	slotnames = PyDict_GetItemString(clsdict, "__slotnames__");
-	if (slotnames != NULL) {
+	if (slotnames != NULL && PyList_Check(slotnames)) {
 		Py_INCREF(slotnames);
 		return slotnames;
 	}
-- 
2.49.0