commit c06a6d0958e2eb4449605069b9c10d656ab756e8
author Serhiy Storchaka <storchaka@gmail.com> Sat Dec 19 20:07:48 2015 +0200
committer Serhiy Storchaka <storchaka@gmail.com> Sat Dec 19 20:07:48 2015 +0200
tree 3be097cf344ed6c277ca77bd37f253f5c66d3a7d
parent 6f3d5da36cb6f7a7472c69f92de16682e5a82620

Issue #25421: __sizeof__ methods of builtin types now use dynamic basic size.
This allows sys.getsize() to work correctly with their subclasses with
__slots__ defined.

Objects/setobject.c

diff --git a/Objects/setobject.c b/Objects/setobject.c
index 8a58d65..a9ebbec 100644
--- a/Objects/setobject.c
+++ b/Objects/setobject.c
@@ -1985,7 +1985,7 @@
 {
     Py_ssize_t res;
 
-    res = sizeof(PySetObject);
+    res = _PyObject_SIZE(Py_TYPE(so));
     if (so->table != so->smalltable)
         res = res + (so->mask + 1) * sizeof(setentry);
     return PyInt_FromSsize_t(res);