Use the public (since Py3.8) C-API function in the vectorcall code instead of a private function that is now removed in Py3.13.

scoder · scoder · commit e1d06dc8c9be · 2023-07-23T14:21:33.000+02:00
diff --git a/Cython/Utility/ObjectHandling.c b/Cython/Utility/ObjectHandling.c
@@ -2317,7 +2317,7 @@ static CYTHON_INLINE PyObject* __Pyx_PyObject_FastCallDict(PyObject *func, PyObj
     #endif
 
     #if CYTHON_VECTORCALL
-    vectorcallfunc f = _PyVectorcall_Function(func);
+    vectorcallfunc f = PyVectorcall_Function(func);
     if (f) {
         return f(func, args, (size_t)nargs, kwargs);
     }

Original file line number	Diff line number	Diff line change
`@@ -2317,7 +2317,7 @@ static CYTHON_INLINE PyObject* __Pyx_PyObject_FastCallDict(PyObject *func, PyObj`
`2317`	`2317`	`#endif`
`2318`	`2318`
`2319`	`2319`	`#if CYTHON_VECTORCALL`
`2320`		`- vectorcallfunc f = _PyVectorcall_Function(func);`
	`2320`	`+ vectorcallfunc f = PyVectorcall_Function(func);`
`2321`	`2321`	`if (f) {`
`2322`	`2322`	`return f(func, args, (size_t)nargs, kwargs);`
`2323`	`2323`	`}`