Fix enum_type_object type on Python 3.11

vstinner · stefanseefeld · commit a218babc8dae · 2022-04-26T09:42:26.000-04:00
The enum_type_object type inherits from PyLong_Type which is not tracked by the GC. Instances doesn't have to be tracked by the GC: remove the Py_TPFLAGS_HAVE_GC flag. The Python C API documentation says: "To create a container type, the tp_flags field of the type object must include the Py_TPFLAGS_HAVE_GC and provide an implementation of the tp_traverse handler." https://docs.python.org/dev/c-api/gcsupport.html The new exception was introduced in Python 3.11 by: python/cpython#88429
diff --git a/src/object/enum.cpp b/src/object/enum.cpp
@@ -113,7 +113,6 @@ static PyTypeObject enum_type_object = {
 #if PY_VERSION_HEX < 0x03000000
     | Py_TPFLAGS_CHECKTYPES
 #endif
-    | Py_TPFLAGS_HAVE_GC
     | Py_TPFLAGS_BASETYPE,                  /* tp_flags */
     0,                                      /* tp_doc */
     0,                                      /* tp_traverse */
