https://github.com/python/cpython/commit/011979132648d50f83d4506d768dca24de47c8c6
commit: 011979132648d50f83d4506d768dca24de47c8c6
branch: main
author: Mae Hood <22501070+bigliza...@users.noreply.github.com>
committer: methane <songofaca...@gmail.com>
date: 2025-05-01T08:39:26+09:00
summary:
dict: Remove redundant incref of immortal object Py_EMPTY_KEYS (GH-133200)
files:
M Objects/dictobject.c
diff --git a/Objects/dictobject.c b/Objects/dictobject.c
index 00658a8ac35bcf..59b0cf1ce7d422 100644
--- a/Objects/dictobject.c
+++ b/Objects/dictobject.c
@@ -4851,7 +4851,8 @@ dict_new(PyTypeObject *type, PyObject *args, PyObject
*kwds)
d->ma_used = 0;
d->_ma_watcher_tag = 0;
- dictkeys_incref(Py_EMPTY_KEYS);
+ // We don't inc ref empty keys because they're immortal
+ assert((Py_EMPTY_KEYS)->dk_refcnt == _Py_DICT_IMMORTAL_INITIAL_REFCNT);
d->ma_keys = Py_EMPTY_KEYS;
d->ma_values = NULL;
ASSERT_CONSISTENT(d);
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