1 files changed, 5 insertions, 7 deletions
diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index 8e3fbe3..56d771f 100644
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -979,12 +979,6 @@ static PyObject *
 call_trampoline(PyThreadState *tstate, PyObject* callback,
                 PyFrameObject *frame, int what, PyObject *arg)
 {
-
-    PyObject *stack[3];
-    stack[0] = (PyObject *)frame;
-    stack[1] = whatstrings[what];
-    stack[2] = (arg != NULL) ? arg : Py_None;
-
     /* Discard any previous modifications the frame's fast locals */
     if (frame->f_fast_as_locals) {
         if (PyFrame_FastToLocalsWithError(frame) < 0) {
@@ -993,7 +987,11 @@ call_trampoline(PyThreadState *tstate, PyObject* callback,
     }
 
     /* call the Python-level function */
-    PyObject *result = _PyObject_FastCallTstate(tstate, callback, stack, 3);
+    if (arg == NULL) {
+        arg = Py_None;
+    }
+    PyObject *args[3] = {(PyObject *)frame, whatstrings[what], arg};
+    PyObject *result = _PyObject_VectorcallTstate(tstate, callback, args, 3, NULL);
 
     PyFrame_LocalsToFast(frame, 1);
     return result;