(Contributed by Victor Stinner in :issue:`39573`.)
-* Since :c:func:`Py_SIZE()` is changed to the inline static function,
- ``Py_SIZE(obj) = new_size`` must be replaced with ``Py_SET_SIZE(obj, new_size)``:
- see :c:func:`Py_SET_SIZE()` (available since Python 3.9). For backward
- compatibility, this macro can be used::
-
- #if PY_VERSION_HEX < 0x030900A4
- # define Py_SET_SIZE(obj, size) ((Py_SIZE(obj) = (size)), (void)0)
- #endif
-
- (Contributed by Victor Stinner in :issue:`39573`.)
-
* Calling :c:func:`PyDict_GetItem` without :term:`GIL` held had been allowed
for historical reason. It is no longer allowed.
(Contributed by Victor Stinner in :issue:`40839`.)