commit de4ae3d4869e88dda8bfbad24880cb398160a7a0
author Victor Stinner <victor.stinner@gmail.com> Sun Dec 04 22:59:09 2016 +0100
committer Victor Stinner <victor.stinner@gmail.com> Sun Dec 04 22:59:09 2016 +0100
tree b8c42842a31f408c9fe09993e19fba49d60b2dcf
parent c8d03187ff85326ab8b24af06f8a4e391365f42a

Backed out changeset b9c9691c72c5

Issue #28858: The change b9c9691c72c5 introduced a regression. It seems like
_PyObject_CallArg1() uses more stack memory than
PyObject_CallFunctionObjArgs().

Objects/odictobject.c

diff --git a/Objects/odictobject.c b/Objects/odictobject.c
index 77fb3a1..22b1f1d 100644
--- a/Objects/odictobject.c
+++ b/Objects/odictobject.c
@@ -1256,7 +1256,7 @@
     if (PyODict_CheckExact(od))
         od_copy = PyODict_New();
     else
-        od_copy = _PyObject_CallNoArg((PyObject *)Py_TYPE(od));
+        od_copy = PyObject_CallFunctionObjArgs((PyObject *)Py_TYPE(od), NULL);
     if (od_copy == NULL)
         return NULL;