gh-128262: Allow specialization of calls to classes with __slots__ (GH-128263)

1 files changed, 6 insertions, 2 deletions

diff --git a/Python/executor_cases.c.h b/Python/executor_cases.c.h
index 22335021faa..f7374d52705 100644
--- a/Python/executor_cases.c.h
+++ b/Python/executor_cases.c.h
@@ -4572,7 +4572,9 @@
                 UOP_STAT_INC(uopcode, miss);
                 JUMP_TO_JUMP_TARGET();
             }
-            assert(tp->tp_flags & Py_TPFLAGS_INLINE_VALUES);
+            assert(tp->tp_new == PyBaseObject_Type.tp_new);
+            assert(tp->tp_flags & Py_TPFLAGS_HEAPTYPE);
+            assert(tp->tp_alloc == PyType_GenericAlloc);
             PyHeapTypeObject *cls = (PyHeapTypeObject *)callable_o;
             PyFunctionObject *init_func = (PyFunctionObject *)FT_ATOMIC_LOAD_PTR_ACQUIRE(cls->_spec_cache.init);
             PyCodeObject *code = (PyCodeObject *)init_func->func_code;
@@ -4581,7 +4583,9 @@
                 JUMP_TO_JUMP_TARGET();
             }
             STAT_INC(CALL, hit);
-            PyObject *self_o = _PyType_NewManagedObject(tp);
+            _PyFrame_SetStackPointer(frame, stack_pointer);
+            PyObject *self_o = PyType_GenericAlloc(tp, 0);
+            stack_pointer = _PyFrame_GetStackPointer(frame);
             if (self_o == NULL) {
                 JUMP_TO_ERROR();
             }