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/_sre.c

diff --git a/Modules/_sre.c b/Modules/_sre.c
index 59f7551..9d0fc4a 100644
--- a/Modules/_sre.c
+++ b/Modules/_sre.c
@@ -2690,7 +2690,8 @@ static PyType_Spec pattern_spec = {
     .name = "re.Pattern",
     .basicsize = sizeof(PatternObject),
     .itemsize = sizeof(SRE_CODE),
-    .flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_IMMUTABLETYPE,
+    .flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_IMMUTABLETYPE |
+              Py_TPFLAGS_DISALLOW_INSTANTIATION),
     .slots = pattern_slots,
 };
 
@@ -2755,7 +2756,8 @@ static PyType_Spec match_spec = {
     .name = "re.Match",
     .basicsize = sizeof(MatchObject),
     .itemsize = sizeof(Py_ssize_t),
-    .flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_IMMUTABLETYPE,
+    .flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_IMMUTABLETYPE |
+              Py_TPFLAGS_DISALLOW_INSTANTIATION),
     .slots = match_slots,
 };
 
@@ -2781,7 +2783,8 @@ static PyType_Slot scanner_slots[] = {
 static PyType_Spec scanner_spec = {
     .name = "_" SRE_MODULE ".SRE_Scanner",
     .basicsize = sizeof(ScannerObject),
-    .flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_IMMUTABLETYPE,
+    .flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_IMMUTABLETYPE |
+              Py_TPFLAGS_DISALLOW_INSTANTIATION),
     .slots = scanner_slots,
 };