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
diff --git a/Modules/arraymodule.c b/Modules/arraymodule.c
index d65c144..aa5886f 100644
--- a/Modules/arraymodule.c
+++ b/Modules/arraymodule.c
@@ -2987,7 +2987,8 @@ static PyType_Slot arrayiter_slots[] = {
static PyType_Spec arrayiter_spec = {
.name = "array.arrayiterator",
.basicsize = sizeof(arrayiterobject),
- .flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,
+ .flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
+ Py_TPFLAGS_DISALLOW_INSTANTIATION),
.slots = arrayiter_slots,
};