commit 9746cda705decebc0ba572d95612796afd06dcd4
author Erlend Egeberg Aasland <erlend.aasland@innova.no> Fri Apr 30 16:04:57 2021 +0200
committer GitHub <noreply@github.com> Fri Apr 30 16:04:57 2021 +0200
tree d21d7082061099687919b8e744250bb39cf5613d
parent 387397f8a4244c983f4568c16a28842e3268fe5d

bpo-43916: Apply Py_TPFLAGS_DISALLOW_INSTANTIATION to selected types (GH-25748)

Apply Py_TPFLAGS_DISALLOW_INSTANTIATION to the following types:

* _dbm.dbm
* _gdbm.gdbm
* _multibytecodec.MultibyteCodec
* _sre..SRE_Scanner
* _thread._localdummy
* _thread.lock
* _winapi.Overlapped
* array.arrayiterator
* functools.KeyWrapper
* functools._lru_list_elem
* pyexpat.xmlparser
* re.Match
* re.Pattern
* unicodedata.UCD
* zlib.Compress
* zlib.Decompress

Modules/_functoolsmodule.c

diff --git a/Modules/_functoolsmodule.c b/Modules/_functoolsmodule.c
index eea542e..19cfa9b 100644
--- a/Modules/_functoolsmodule.c
+++ b/Modules/_functoolsmodule.c
@@ -546,7 +546,7 @@ static PyType_Slot keyobject_type_slots[] = {
 static PyType_Spec keyobject_type_spec = {
     .name = "functools.KeyWrapper",
     .basicsize = sizeof(keyobject),
-    .flags = Py_TPFLAGS_DEFAULT,
+    .flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_DISALLOW_INSTANTIATION,
     .slots = keyobject_type_slots
 };
 
@@ -766,7 +766,7 @@ static PyType_Slot lru_list_elem_type_slots[] = {
 static PyType_Spec lru_list_elem_type_spec = {
     .name = "functools._lru_list_elem",
     .basicsize = sizeof(lru_list_elem),
-    .flags = Py_TPFLAGS_DEFAULT,
+    .flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_DISALLOW_INSTANTIATION,
     .slots = lru_list_elem_type_slots
 };