commit 55edd0c185ad2d895b5d73e47d67049bc156b654
author Siddhesh Poyarekar <siddhesh.poyarekar@gmail.com> Mon Apr 30 00:29:33 2018 +0530
committer Serhiy Storchaka <storchaka@gmail.com> Sun Apr 29 21:59:33 2018 +0300
tree d609dfc924b59b89816a610ba86cd3e6c34a641c
parent 9f3535c9cde8813ce631d6ebe4d790682f594828

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.

Objects/iterobject.c

diff --git a/Objects/iterobject.c b/Objects/iterobject.c
index 252169a..5f5ebfc 100644
--- a/Objects/iterobject.c
+++ b/Objects/iterobject.c
@@ -78,7 +78,7 @@
 }
 
 static PyObject *
-iter_len(seqiterobject *it)
+iter_len(seqiterobject *it, PyObject *Py_UNUSED(ignored))
 {
     Py_ssize_t seqsize, len;
 
@@ -101,7 +101,7 @@
 PyDoc_STRVAR(length_hint_doc, "Private method returning an estimate of len(list(it)).");
 
 static PyObject *
-iter_reduce(seqiterobject *it)
+iter_reduce(seqiterobject *it, PyObject *Py_UNUSED(ignored))
 {
     if (it->it_seq != NULL)
         return Py_BuildValue("N(O)n", _PyObject_GetBuiltin("iter"),
@@ -240,7 +240,7 @@
 }
 
 static PyObject *
-calliter_reduce(calliterobject *it)
+calliter_reduce(calliterobject *it, PyObject *Py_UNUSED(ignored))
 {
     if (it->it_callable != NULL && it->it_sentinel != NULL)
         return Py_BuildValue("N(OO)", _PyObject_GetBuiltin("iter"),