bpo-33012: Fix invalid function cast warnings with gcc 8 for METH_NOARGS. (GH-6030)

METH_NOARGS functions need only a single argument but they are cast
into a PyCFunction, which takes two arguments.  This triggers an
invalid function cast warning in gcc8 due to the argument mismatch.
Fix this by adding a dummy unused argument.

1 files changed, 3 insertions, 3 deletions

diff --git a/Objects/sliceobject.c b/Objects/sliceobject.c
index 59f084d1a6..2288df5149 100644
--- a/Objects/sliceobject.c
+++ b/Objects/sliceobject.c
@@ -36,13 +36,13 @@ ellipsis_repr(PyObject *op)
 }
 
 static PyObject *
-ellipsis_reduce(PyObject *op)
+ellipsis_reduce(PyObject *op, PyObject *Py_UNUSED(ignored))
 {
     return PyUnicode_FromString("Ellipsis");
 }
 
 static PyMethodDef ellipsis_methods[] = {
-    {"__reduce__", (PyCFunction)ellipsis_reduce, METH_NOARGS, NULL},
+    {"__reduce__", ellipsis_reduce, METH_NOARGS, NULL},
     {NULL, NULL}
 };
 
@@ -546,7 +546,7 @@ S. Out of bounds indices are clipped in a manner consistent with the\n\
 handling of normal slices.");
 
 static PyObject *
-slice_reduce(PySliceObject* self)
+slice_reduce(PySliceObject* self, PyObject *Py_UNUSED(ignored))
 {
     return Py_BuildValue("O(OOO)", Py_TYPE(self), self->start, self->stop, self->step);
 }