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.
diff --git a/Modules/_struct.c b/Modules/_struct.c
index 0539706..0be52d9 100644
--- a/Modules/_struct.c
+++ b/Modules/_struct.c
@@ -1629,7 +1629,7 @@
}
static PyObject *
-unpackiter_len(unpackiterobject *self)
+unpackiter_len(unpackiterobject *self, PyObject *Py_UNUSED(ignored))
{
Py_ssize_t len;
if (self->so == NULL)