[3.6] bpo-33029: Fix signatures of getter and setter functions. (GH-10746) (GH-10749)

Fix also return type for few other functions (clear, releasebuffer).
(cherry picked from commit d4f9cf5545d6d8844e0726552ef2e366f5cc3abd)

23 files changed, 125 insertions, 119 deletions

diff --git a/Modules/_asynciomodule.c b/Modules/_asynciomodule.c
index 2a6c16da85..39786cc5f6 100644
--- a/Modules/_asynciomodule.c
+++ b/Modules/_asynciomodule.c
@@ -625,7 +625,7 @@ _asyncio_Future_done_impl(FutureObj *self)
 }
 
 static PyObject *
-FutureObj_get_blocking(FutureObj *fut)
+FutureObj_get_blocking(FutureObj *fut, void *Py_UNUSED(ignored))
 {
     if (fut->fut_blocking) {
         Py_RETURN_TRUE;
@@ -636,7 +636,7 @@ FutureObj_get_blocking(FutureObj *fut)
 }
 
 static int
-FutureObj_set_blocking(FutureObj *fut, PyObject *val)
+FutureObj_set_blocking(FutureObj *fut, PyObject *val, void *Py_UNUSED(ignored))
 {
     int is_true = PyObject_IsTrue(val);
     if (is_true < 0) {
@@ -647,7 +647,7 @@ FutureObj_set_blocking(FutureObj *fut, PyObject *val)
 }
 
 static PyObject *
-FutureObj_get_log_traceback(FutureObj *fut)
+FutureObj_get_log_traceback(FutureObj *fut, void *Py_UNUSED(ignored))
 {
     if (fut->fut_log_tb) {
         Py_RETURN_TRUE;
@@ -658,7 +658,7 @@ FutureObj_get_log_traceback(FutureObj *fut)
 }
 
 static int
-FutureObj_set_log_traceback(FutureObj *fut, PyObject *val)
+FutureObj_set_log_traceback(FutureObj *fut, PyObject *val, void *Py_UNUSED(ignored))
 {
     int is_true = PyObject_IsTrue(val);
     if (is_true < 0) {
@@ -669,7 +669,7 @@ FutureObj_set_log_traceback(FutureObj *fut, PyObject *val)
 }
 
 static PyObject *
-FutureObj_get_loop(FutureObj *fut)
+FutureObj_get_loop(FutureObj *fut, void *Py_UNUSED(ignored))
 {
     if (fut->fut_loop == NULL) {
         Py_RETURN_NONE;
@@ -679,7 +679,7 @@ FutureObj_get_loop(FutureObj *fut)
 }
 
 static PyObject *
-FutureObj_get_callbacks(FutureObj *fut)
+FutureObj_get_callbacks(FutureObj *fut, void *Py_UNUSED(ignored))
 {
     if (fut->fut_callbacks == NULL) {
         Py_RETURN_NONE;
@@ -689,7 +689,7 @@ FutureObj_get_callbacks(FutureObj *fut)
 }
 
 static PyObject *
-FutureObj_get_result(FutureObj *fut)
+FutureObj_get_result(FutureObj *fut, void *Py_UNUSED(ignored))
 {
     if (fut->fut_result == NULL) {
         Py_RETURN_NONE;
@@ -699,7 +699,7 @@ FutureObj_get_result(FutureObj *fut)
 }
 
 static PyObject *
-FutureObj_get_exception(FutureObj *fut)
+FutureObj_get_exception(FutureObj *fut, void *Py_UNUSED(ignored))
 {
     if (fut->fut_exception == NULL) {
         Py_RETURN_NONE;
@@ -709,7 +709,7 @@ FutureObj_get_exception(FutureObj *fut)
 }
 
 static PyObject *
-FutureObj_get_source_traceback(FutureObj *fut)
+FutureObj_get_source_traceback(FutureObj *fut, void *Py_UNUSED(ignored))
 {
     if (fut->fut_source_tb == NULL) {
         Py_RETURN_NONE;
@@ -719,7 +719,7 @@ FutureObj_get_source_traceback(FutureObj *fut)
 }
 
 static PyObject *
-FutureObj_get_state(FutureObj *fut)
+FutureObj_get_state(FutureObj *fut, void *Py_UNUSED(ignored))
 {
     _Py_IDENTIFIER(PENDING);
     _Py_IDENTIFIER(CANCELLED);
@@ -1207,7 +1207,7 @@ TaskStepMethWrapper_traverse(TaskStepMethWrapper *o,
 }
 
 static PyObject *
-TaskStepMethWrapper_get___self__(TaskStepMethWrapper *o)
+TaskStepMethWrapper_get___self__(TaskStepMethWrapper *o, void *Py_UNUSED(ignored))
 {
     if (o->sw_task) {
         Py_INCREF(o->sw_task);
@@ -1387,7 +1387,7 @@ TaskObj_traverse(TaskObj *task, visitproc visit, void *arg)
 }
 
 static PyObject *
-TaskObj_get_log_destroy_pending(TaskObj *task)
+TaskObj_get_log_destroy_pending(TaskObj *task, void *Py_UNUSED(ignored))
 {
     if (task->task_log_destroy_pending) {
         Py_RETURN_TRUE;
@@ -1398,7 +1398,7 @@ TaskObj_get_log_destroy_pending(TaskObj *task)
 }
 
 static int
-TaskObj_set_log_destroy_pending(TaskObj *task, PyObject *val)
+TaskObj_set_log_destroy_pending(TaskObj *task, PyObject *val, void *Py_UNUSED(ignored))
 {
     int is_true = PyObject_IsTrue(val);
     if (is_true < 0) {
@@ -1409,7 +1409,7 @@ TaskObj_set_log_destroy_pending(TaskObj *task, PyObject *val)
 }
 
 static PyObject *
-TaskObj_get_must_cancel(TaskObj *task)
+TaskObj_get_must_cancel(TaskObj *task, void *Py_UNUSED(ignored))
 {
     if (task->task_must_cancel) {
         Py_RETURN_TRUE;
@@ -1420,7 +1420,7 @@ TaskObj_get_must_cancel(TaskObj *task)
 }
 
 static PyObject *
-TaskObj_get_coro(TaskObj *task)
+TaskObj_get_coro(TaskObj *task, void *Py_UNUSED(ignored))
 {
     if (task->task_coro) {
         Py_INCREF(task->task_coro);
@@ -1431,7 +1431,7 @@ TaskObj_get_coro(TaskObj *task)
 }
 
 static PyObject *
-TaskObj_get_fut_waiter(TaskObj *task)
+TaskObj_get_fut_waiter(TaskObj *task, void *Py_UNUSED(ignored))
 {
     if (task->task_fut_waiter) {
         Py_INCREF(task->task_fut_waiter);
diff --git a/Modules/_collectionsmodule.c b/Modules/_collectionsmodule.c
index 85037d0027..4fbf3bdb14 100644
--- a/Modules/_collectionsmodule.c
+++ b/Modules/_collectionsmodule.c
@@ -1539,7 +1539,7 @@ deque_bool(dequeobject *deque)
 }
 
 static PyObject *
-deque_get_maxlen(dequeobject *deque)
+deque_get_maxlen(dequeobject *deque, void *Py_UNUSED(ignored))
 {
     if (deque->maxlen < 0)
         Py_RETURN_NONE;
diff --git a/Modules/_csv.c b/Modules/_csv.c
index 5d0044a237..5324fa6bb6 100644
--- a/Modules/_csv.c
+++ b/Modules/_csv.c
@@ -160,31 +160,31 @@ get_nullchar_as_None(Py_UCS4 c)
 }
 
 static PyObject *
-Dialect_get_lineterminator(DialectObj *self)
+Dialect_get_lineterminator(DialectObj *self, void *Py_UNUSED(ignored))
 {
     return get_string(self->lineterminator);
 }
 
 static PyObject *
-Dialect_get_delimiter(DialectObj *self)
+Dialect_get_delimiter(DialectObj *self, void *Py_UNUSED(ignored))
 {
     return get_nullchar_as_None(self->delimiter);
 }
 
 static PyObject *
-Dialect_get_escapechar(DialectObj *self)
+Dialect_get_escapechar(DialectObj *self, void *Py_UNUSED(ignored))
 {
     return get_nullchar_as_None(self->escapechar);
 }
 
 static PyObject *
-Dialect_get_quotechar(DialectObj *self)
+Dialect_get_quotechar(DialectObj *self, void *Py_UNUSED(ignored))
 {
     return get_nullchar_as_None(self->quotechar);
 }
 
 static PyObject *
-Dialect_get_quoting(DialectObj *self)
+Dialect_get_quoting(DialectObj *self, void *Py_UNUSED(ignored))
 {
     return PyLong_FromLong(self->quoting);
 }
diff --git a/Modules/_ctypes/_ctypes.c b/Modules/_ctypes/_ctypes.c
index 69d73f5a95..c5b499c7aa 100644
--- a/Modules/_ctypes/_ctypes.c
+++ b/Modules/_ctypes/_ctypes.c
@@ -1163,7 +1163,7 @@ PyTypeObject PyCPointerType_Type = {
 */
 
 static int
-CharArray_set_raw(CDataObject *self, PyObject *value)
+CharArray_set_raw(CDataObject *self, PyObject *value, void *Py_UNUSED(ignored))
 {
     char *ptr;
     Py_ssize_t size;
@@ -1189,13 +1189,13 @@ CharArray_set_raw(CDataObject *self, PyObject *value)
 }
 
 static PyObject *
-CharArray_get_raw(CDataObject *self)
+CharArray_get_raw(CDataObject *self, void *Py_UNUSED(ignored))
 {
     return PyBytes_FromStringAndSize(self->b_ptr, self->b_size);
 }
 
 static PyObject *
-CharArray_get_value(CDataObject *self)
+CharArray_get_value(CDataObject *self, void *Py_UNUSED(ignored))
 {
     Py_ssize_t i;
     char *ptr = self->b_ptr;
@@ -1206,7 +1206,7 @@ CharArray_get_value(CDataObject *self)
 }
 
 static int
-CharArray_set_value(CDataObject *self, PyObject *value)
+CharArray_set_value(CDataObject *self, PyObject *value, void *Py_UNUSED(ignored))
 {
     char *ptr;
     Py_ssize_t size;
@@ -1251,7 +1251,7 @@ static PyGetSetDef CharArray_getsets[] = {
 
 #ifdef CTYPES_UNICODE
 static PyObject *
-WCharArray_get_value(CDataObject *self)
+WCharArray_get_value(CDataObject *self, void *Py_UNUSED(ignored))
 {
     Py_ssize_t i;
     wchar_t *ptr = (wchar_t *)self->b_ptr;
@@ -1262,7 +1262,7 @@ WCharArray_get_value(CDataObject *self)
 }
 
 static int
-WCharArray_set_value(CDataObject *self, PyObject *value)
+WCharArray_set_value(CDataObject *self, PyObject *value, void *Py_UNUSED(ignored))
 {
     Py_ssize_t result = 0;
     Py_UNICODE *wstr;
@@ -3049,7 +3049,7 @@ GenericPyCData_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
 */
 
 static int
-PyCFuncPtr_set_errcheck(PyCFuncPtrObject *self, PyObject *ob)
+PyCFuncPtr_set_errcheck(PyCFuncPtrObject *self, PyObject *ob, void *Py_UNUSED(ignored))
 {
     if (ob && !PyCallable_Check(ob)) {
         PyErr_SetString(PyExc_TypeError,
@@ -3062,7 +3062,7 @@ PyCFuncPtr_set_errcheck(PyCFuncPtrObject *self, PyObject *ob)
 }
 
 static PyObject *
-PyCFuncPtr_get_errcheck(PyCFuncPtrObject *self)
+PyCFuncPtr_get_errcheck(PyCFuncPtrObject *self, void *Py_UNUSED(ignored))
 {
     if (self->errcheck) {
         Py_INCREF(self->errcheck);
@@ -3073,7 +3073,7 @@ PyCFuncPtr_get_errcheck(PyCFuncPtrObject *self)
 }
 
 static int
-PyCFuncPtr_set_restype(PyCFuncPtrObject *self, PyObject *ob)
+PyCFuncPtr_set_restype(PyCFuncPtrObject *self, PyObject *ob, void *Py_UNUSED(ignored))
 {
     if (ob == NULL) {
         Py_CLEAR(self->restype);
@@ -3094,7 +3094,7 @@ PyCFuncPtr_set_restype(PyCFuncPtrObject *self, PyObject *ob)
 }
 
 static PyObject *
-PyCFuncPtr_get_restype(PyCFuncPtrObject *self)
+PyCFuncPtr_get_restype(PyCFuncPtrObject *self, void *Py_UNUSED(ignored))
 {
     StgDictObject *dict;
     if (self->restype) {
@@ -3113,7 +3113,7 @@ PyCFuncPtr_get_restype(PyCFuncPtrObject *self)
 }
 
 static int
-PyCFuncPtr_set_argtypes(PyCFuncPtrObject *self, PyObject *ob)
+PyCFuncPtr_set_argtypes(PyCFuncPtrObject *self, PyObject *ob, void *Py_UNUSED(ignored))
 {
     PyObject *converters;
 
@@ -3132,7 +3132,7 @@ PyCFuncPtr_set_argtypes(PyCFuncPtrObject *self, PyObject *ob)
 }
 
 static PyObject *
-PyCFuncPtr_get_argtypes(PyCFuncPtrObject *self)
+PyCFuncPtr_get_argtypes(PyCFuncPtrObject *self, void *Py_UNUSED(ignored))
 {
     StgDictObject *dict;
     if (self->argtypes) {
@@ -4678,7 +4678,7 @@ PyCArrayType_from_ctype(PyObject *itemtype, Py_ssize_t length)
 */
 
 static int
-Simple_set_value(CDataObject *self, PyObject *value)
+Simple_set_value(CDataObject *self, PyObject *value, void *Py_UNUSED(ignored))
 {
     PyObject *result;
     StgDictObject *dict = PyObject_stgdict((PyObject *)self);
@@ -4705,12 +4705,12 @@ Simple_init(CDataObject *self, PyObject *args, PyObject *kw)
     if (!PyArg_UnpackTuple(args, "__init__", 0, 1, &value))
         return -1;
     if (value)
-        return Simple_set_value(self, value);
+        return Simple_set_value(self, value, NULL);
     return 0;
 }
 
 static PyObject *
-Simple_get_value(CDataObject *self)
+Simple_get_value(CDataObject *self, void *Py_UNUSED(ignored))
 {
     StgDictObject *dict;
     dict = PyObject_stgdict((PyObject *)self);
@@ -4733,7 +4733,7 @@ Simple_from_outparm(PyObject *self, PyObject *args)
         return self;
     }
     /* call stgdict->getfunc */
-    return Simple_get_value((CDataObject *)self);
+    return Simple_get_value((CDataObject *)self, NULL);
 }
 
 static PyMethodDef Simple_methods[] = {
@@ -4770,7 +4770,7 @@ Simple_repr(CDataObject *self)
                                    Py_TYPE(self)->tp_name, self);
     }
 
-    val = Simple_get_value(self);
+    val = Simple_get_value(self, NULL);
     if (val == NULL)
         return NULL;
 
diff --git a/Modules/_cursesmodule.c b/Modules/_cursesmodule.c
index 4ac702aa2f..8b46466d6f 100644
--- a/Modules/_cursesmodule.c
+++ b/Modules/_cursesmodule.c
@@ -1976,7 +1976,7 @@ PyCursesWindow_get_encoding(PyCursesWindowObject *self, void *closure)
 }
 
 static int
-PyCursesWindow_set_encoding(PyCursesWindowObject *self, PyObject *value)
+PyCursesWindow_set_encoding(PyCursesWindowObject *self, PyObject *value, void *Py_UNUSED(ignored))
 {
     PyObject *ascii;
     char *encoding;
diff --git a/Modules/_io/bytesio.c b/Modules/_io/bytesio.c
index 6c54de733b..d5884fa533 100644
--- a/Modules/_io/bytesio.c
+++ b/Modules/_io/bytesio.c
@@ -201,7 +201,7 @@ write_bytes(bytesio *self, const char *bytes, Py_ssize_t len)
 }
 
 static PyObject *
-bytesio_get_closed(bytesio *self)
+bytesio_get_closed(bytesio *self, void *Py_UNUSED(ignored))
 {
     if (self->buf == NULL) {
         Py_RETURN_TRUE;
diff --git a/Modules/_pickle.c b/Modules/_pickle.c
index 6830d93f50..389bb6701c 100644
--- a/Modules/_pickle.c
+++ b/Modules/_pickle.c
@@ -4476,13 +4476,13 @@ PicklerMemoProxy_New(PicklerObject *pickler)
 /*****************************************************************************/
 
 static PyObject *
-Pickler_get_memo(PicklerObject *self)
+Pickler_get_memo(PicklerObject *self, void *Py_UNUSED(ignored))
 {
     return PicklerMemoProxy_New(self);
 }
 
 static int
-Pickler_set_memo(PicklerObject *self, PyObject *obj)
+Pickler_set_memo(PicklerObject *self, PyObject *obj, void *Py_UNUSED(ignored))
 {
     PyMemoTable *new_memo = NULL;
 
@@ -4544,7 +4544,7 @@ Pickler_set_memo(PicklerObject *self, PyObject *obj)
 }
 
 static PyObject *
-Pickler_get_persid(PicklerObject *self)
+Pickler_get_persid(PicklerObject *self, void *Py_UNUSED(ignored))
 {
     if (self->pers_func == NULL) {
         PyErr_SetString(PyExc_AttributeError, "persistent_id");
@@ -4554,7 +4554,7 @@ Pickler_get_persid(PicklerObject *self)
 }
 
 static int
-Pickler_set_persid(PicklerObject *self, PyObject *value)
+Pickler_set_persid(PicklerObject *self, PyObject *value, void *Py_UNUSED(ignored))
 {
     if (value == NULL) {
         PyErr_SetString(PyExc_TypeError,
@@ -6908,13 +6908,13 @@ UnpicklerMemoProxy_New(UnpicklerObject *unpickler)
 
 
 static PyObject *
-Unpickler_get_memo(UnpicklerObject *self)
+Unpickler_get_memo(UnpicklerObject *self, void *Py_UNUSED(ignored))
 {
     return UnpicklerMemoProxy_New(self);
 }
 
 static int
-Unpickler_set_memo(UnpicklerObject *self, PyObject *obj)
+Unpickler_set_memo(UnpicklerObject *self, PyObject *obj, void *Py_UNUSED(ignored))
 {
     PyObject **new_memo;
     size_t new_memo_size = 0;
@@ -6991,7 +6991,7 @@ Unpickler_set_memo(UnpicklerObject *self, PyObject *obj)
 }
 
 static PyObject *
-Unpickler_get_persload(UnpicklerObject *self)
+Unpickler_get_persload(UnpicklerObject *self, void *Py_UNUSED(ignored))
 {
     if (self->pers_func == NULL) {
         PyErr_SetString(PyExc_AttributeError, "persistent_load");
@@ -7001,7 +7001,7 @@ Unpickler_get_persload(UnpicklerObject *self)
 }
 
 static int
-Unpickler_set_persload(UnpicklerObject *self, PyObject *value)
+Unpickler_set_persload(UnpicklerObject *self, PyObject *value, void *Py_UNUSED(ignored))
 {
     if (value == NULL) {
         PyErr_SetString(PyExc_TypeError,
diff --git a/Modules/_sqlite/connection.c b/Modules/_sqlite/connection.c
index f503288336..d86caef7ab 100644
--- a/Modules/_sqlite/connection.c
+++ b/Modules/_sqlite/connection.c
@@ -51,7 +51,7 @@ static const char * const begin_statements[] = {
     NULL
 };
 
-static int pysqlite_connection_set_isolation_level(pysqlite_Connection* self, PyObject* isolation_level);
+static int pysqlite_connection_set_isolation_level(pysqlite_Connection* self, PyObject* isolation_level, void *Py_UNUSED(ignored));
 static void _pysqlite_drop_unused_cursor_references(pysqlite_Connection* self);
 
 
@@ -136,7 +136,7 @@ int pysqlite_connection_init(pysqlite_Connection* self, PyObject* args, PyObject
         Py_INCREF(isolation_level);
     }
     self->isolation_level = NULL;
-    if (pysqlite_connection_set_isolation_level(self, isolation_level) < 0) {
+    if (pysqlite_connection_set_isolation_level(self, isolation_level, NULL) < 0) {
         Py_DECREF(isolation_level);
         return -1;
     }
@@ -1162,7 +1162,8 @@ static PyObject* pysqlite_connection_get_in_transaction(pysqlite_Connection* sel
     Py_RETURN_FALSE;
 }
 
-static int pysqlite_connection_set_isolation_level(pysqlite_Connection* self, PyObject* isolation_level)
+static int
+pysqlite_connection_set_isolation_level(pysqlite_Connection* self, PyObject* isolation_level, void *Py_UNUSED(ignored))
 {
     if (isolation_level == Py_None) {
         PyObject *res = pysqlite_connection_commit(self, NULL);
diff --git a/Modules/_sqlite/row.c b/Modules/_sqlite/row.c
index 53342f3444..8c53f89f1b 100644
--- a/Modules/_sqlite/row.c
+++ b/Modules/_sqlite/row.c
@@ -150,7 +150,8 @@ PyObject* pysqlite_row_subscript(pysqlite_Row* self, PyObject* idx)
     }
 }
 
-Py_ssize_t pysqlite_row_length(pysqlite_Row* self, PyObject* args, PyObject* kwargs)
+static Py_ssize_t
+pysqlite_row_length(pysqlite_Row* self)
 {
     return PyTuple_GET_SIZE(self->data);
 }
diff --git a/Modules/_sre.c b/Modules/_sre.c
index d09249672f..a4b7e72153 100644
--- a/Modules/_sre.c
+++ b/Modules/_sre.c
@@ -1424,7 +1424,7 @@ PyDoc_STRVAR(pattern_doc, "Compiled regular expression objects");
 
 /* PatternObject's 'groupindex' method. */
 static PyObject *
-pattern_groupindex(PatternObject *self)
+pattern_groupindex(PatternObject *self, void *Py_UNUSED(ignored))
 {
     return PyDictProxy_New(self->groupindex);
 }
@@ -2426,7 +2426,7 @@ PyDoc_STRVAR(match_group_doc,
     For 0 returns the entire match.");
 
 static PyObject *
-match_lastindex_get(MatchObject *self)
+match_lastindex_get(MatchObject *self, void *Py_UNUSED(ignored))
 {
     if (self->lastindex >= 0)
         return PyLong_FromSsize_t(self->lastindex);
@@ -2435,7 +2435,7 @@ match_lastindex_get(MatchObject *self)
 }
 
 static PyObject *
-match_lastgroup_get(MatchObject *self)
+match_lastgroup_get(MatchObject *self, void *Py_UNUSED(ignored))
 {
     if (self->pattern->indexgroup && self->lastindex >= 0) {
         PyObject* result = PySequence_GetItem(
@@ -2450,7 +2450,7 @@ match_lastgroup_get(MatchObject *self)
 }
 
 static PyObject *
-match_regs_get(MatchObject *self)
+match_regs_get(MatchObject *self, void *Py_UNUSED(ignored))
 {
     if (self->regs) {
         Py_INCREF(self->regs);
diff --git a/Modules/_testbuffer.c b/Modules/_testbuffer.c
index 669794df01..a16b96db04 100644
--- a/Modules/_testbuffer.c
+++ b/Modules/_testbuffer.c
@@ -1531,7 +1531,7 @@ ndarray_getbuf(NDArrayObject *self, Py_buffer *view, int flags)
     return 0;
 }
 
-static int
+static void
 ndarray_releasebuf(NDArrayObject *self, Py_buffer *view)
 {
     if (!ND_IS_CONSUMER(self)) {
@@ -1539,8 +1539,6 @@ ndarray_releasebuf(NDArrayObject *self, Py_buffer *view)
         if (--ndbuf->exports == 0 && ndbuf != self->head)
             ndbuf_delete(self, ndbuf);
     }
-
-    return 0;
 }
 
 static PyBufferProcs ndarray_as_buffer = {
diff --git a/Modules/_tkinter.c b/Modules/_tkinter.c
index 080b44f785..473e601556 100644
--- a/Modules/_tkinter.c
+++ b/Modules/_tkinter.c
@@ -864,7 +864,7 @@ PyTclObject_string(PyTclObject *self, void *ignored)
 }
 
 static PyObject *
-PyTclObject_str(PyTclObject *self, void *ignored)
+PyTclObject_str(PyTclObject *self)
 {
     if (self->string) {
         Py_INCREF(self->string);
@@ -877,7 +877,7 @@ PyTclObject_str(PyTclObject *self, void *ignored)
 static PyObject *
 PyTclObject_repr(PyTclObject *self)
 {
-    PyObject *repr, *str = PyTclObject_str(self, NULL);
+    PyObject *repr, *str = PyTclObject_str(self);
     if (str == NULL)
         return NULL;
     repr = PyUnicode_FromFormat("<%s object: %R>",
diff --git a/Modules/cjkcodecs/multibytecodec.c b/Modules/cjkcodecs/multibytecodec.c
index d6efc77d20..e85ec56e0a 100644
--- a/Modules/cjkcodecs/multibytecodec.c
+++ b/Modules/cjkcodecs/multibytecodec.c
@@ -108,7 +108,7 @@ call_error_callback(PyObject *errors, PyObject *exc)
 }
 
 static PyObject *
-codecctx_errors_get(MultibyteStatefulCodecContext *self)
+codecctx_errors_get(MultibyteStatefulCodecContext *self, void *Py_UNUSED(ignored))
 {
     const char *errors;
 
diff --git a/Modules/mmapmodule.c b/Modules/mmapmodule.c
index 721e5ed32e..dec670fa0b 100644
--- a/Modules/mmapmodule.c
+++ b/Modules/mmapmodule.c
@@ -681,7 +681,7 @@ mmap_move_method(mmap_object *self, PyObject *args)
 }
 
 static PyObject *
-mmap_closed_get(mmap_object *self)
+mmap_closed_get(mmap_object *self, void *Py_UNUSED(ignored))
 {
 #ifdef MS_WINDOWS
     return PyBool_FromLong(self->map_handle == NULL ? 1 : 0);
diff --git a/Modules/selectmodule.c b/Modules/selectmodule.c
index 5438b697dd..f02f5ae4e1 100644
--- a/Modules/selectmodule.c
+++ b/Modules/selectmodule.c
@@ -1026,7 +1026,7 @@ Close the devpoll file descriptor. Further operations on the devpoll\n\
 object will raise an exception.");
 
 static PyObject*
-devpoll_get_closed(devpollObject *self)
+devpoll_get_closed(devpollObject *self, void *Py_UNUSED(ignored))
 {
     if (self->fd_devpoll < 0)
         Py_RETURN_TRUE;
@@ -1345,7 +1345,7 @@ Close the epoll control file descriptor. Further operations on the epoll\n\
 object will raise an exception.");
 
 static PyObject*
-pyepoll_get_closed(pyEpoll_Object *self)
+pyepoll_get_closed(pyEpoll_Object *self, void *Py_UNUSED(ignored))
 {
     if (self->epfd < 0)
         Py_RETURN_TRUE;
@@ -2091,7 +2091,7 @@ Close the kqueue control file descriptor. Further operations on the kqueue\n\
 object will raise an exception.");
 
 static PyObject*
-kqueue_queue_get_closed(kqueue_queue_Object *self)
+kqueue_queue_get_closed(kqueue_queue_Object *self, void *Py_UNUSED(ignored))
 {
     if (self->kqfd < 0)
         Py_RETURN_TRUE;
diff --git a/Modules/xxsubtype.c b/Modules/xxsubtype.c
index 11242d7391..d2593b12d6 100644
--- a/Modules/xxsubtype.c
+++ b/Modules/xxsubtype.c
@@ -89,7 +89,7 @@ spamlist_init(spamlistobject *self, PyObject *args, PyObject *kwds)
 }
 
 static PyObject *
-spamlist_state_get(spamlistobject *self)
+spamlist_state_get(spamlistobject *self, void *Py_UNUSED(ignored))
 {
     return PyLong_FromLong(self->state);
 }
diff --git a/Objects/descrobject.c b/Objects/descrobject.c
index 9020ccd325..9d258cf111 100644
--- a/Objects/descrobject.c
+++ b/Objects/descrobject.c
@@ -378,7 +378,7 @@ calculate_qualname(PyDescrObject *descr)
 }
 
 static PyObject *
-descr_get_qualname(PyDescrObject *descr)
+descr_get_qualname(PyDescrObject *descr, void *Py_UNUSED(ignored))
 {
     if (descr->d_qualname == NULL)
         descr->d_qualname = calculate_qualname(descr);
@@ -1118,7 +1118,7 @@ static PyMemberDef wrapper_members[] = {
 };
 
 static PyObject *
-wrapper_objclass(wrapperobject *wp)
+wrapper_objclass(wrapperobject *wp, void *Py_UNUSED(ignored))
 {
     PyObject *c = (PyObject *)PyDescr_TYPE(wp->descr);
 
@@ -1127,7 +1127,7 @@ wrapper_objclass(wrapperobject *wp)
 }
 
 static PyObject *
-wrapper_name(wrapperobject *wp)
+wrapper_name(wrapperobject *wp, void *Py_UNUSED(ignored))
 {
     const char *s = wp->descr->d_base->name;
 
@@ -1135,21 +1135,21 @@ wrapper_name(wrapperobject *wp)
 }
 
 static PyObject *
-wrapper_doc(wrapperobject *wp, void *closure)
+wrapper_doc(wrapperobject *wp, void *Py_UNUSED(ignored))
 {
     return _PyType_GetDocFromInternalDoc(wp->descr->d_base->name, wp->descr->d_base->doc);
 }
 
 static PyObject *
-wrapper_text_signature(wrapperobject *wp, void *closure)
+wrapper_text_signature(wrapperobject *wp, void *Py_UNUSED(ignored))
 {
     return _PyType_GetTextSignatureFromInternalDoc(wp->descr->d_base->name, wp->descr->d_base->doc);
 }
 
 static PyObject *
-wrapper_qualname(wrapperobject *wp)
+wrapper_qualname(wrapperobject *wp, void *Py_UNUSED(ignored))
 {
-    return descr_get_qualname((PyDescrObject *)wp->descr);
+    return descr_get_qualname((PyDescrObject *)wp->descr, NULL);
 }
 
 static PyGetSetDef wrapper_getsets[] = {
diff --git a/Objects/exceptions.c b/Objects/exceptions.c
index 3bec50ea69..6f3b986d32 100644
--- a/Objects/exceptions.c
+++ b/Objects/exceptions.c
@@ -181,7 +181,7 @@ static PyMethodDef BaseException_methods[] = {
 };
 
 static PyObject *
-BaseException_get_args(PyBaseExceptionObject *self)
+BaseException_get_args(PyBaseExceptionObject *self, void *Py_UNUSED(ignored))
 {
     if (self->args == NULL) {
         Py_INCREF(Py_None);
@@ -192,7 +192,7 @@ BaseException_get_args(PyBaseExceptionObject *self)
 }
 
 static int
-BaseException_set_args(PyBaseExceptionObject *self, PyObject *val)
+BaseException_set_args(PyBaseExceptionObject *self, PyObject *val, void *Py_UNUSED(ignored))
 {
     PyObject *seq;
     if (val == NULL) {
@@ -207,7 +207,7 @@ BaseException_set_args(PyBaseExceptionObject *self, PyObject *val)
 }
 
 static PyObject *
-BaseException_get_tb(PyBaseExceptionObject *self)
+BaseException_get_tb(PyBaseExceptionObject *self, void *Py_UNUSED(ignored))
 {
     if (self->traceback == NULL) {
         Py_INCREF(Py_None);
@@ -218,7 +218,7 @@ BaseException_get_tb(PyBaseExceptionObject *self)
 }
 
 static int
-BaseException_set_tb(PyBaseExceptionObject *self, PyObject *tb)
+BaseException_set_tb(PyBaseExceptionObject *self, PyObject *tb, void *Py_UNUSED(ignored))
 {
     if (tb == NULL) {
         PyErr_SetString(PyExc_TypeError, "__traceback__ may not be deleted");
@@ -236,7 +236,8 @@ BaseException_set_tb(PyBaseExceptionObject *self, PyObject *tb)
 }
 
 static PyObject *
-BaseException_get_context(PyObject *self) {
+BaseException_get_context(PyObject *self, void *Py_UNUSED(ignored))
+{
     PyObject *res = PyException_GetContext(self);
     if (res)
         return res;  /* new reference already returned above */
@@ -244,7 +245,8 @@ BaseException_get_context(PyObject *self) {
 }
 
 static int
-BaseException_set_context(PyObject *self, PyObject *arg) {
+BaseException_set_context(PyObject *self, PyObject *arg, void *Py_UNUSED(ignored))
+{
     if (arg == NULL) {
         PyErr_SetString(PyExc_TypeError, "__context__ may not be deleted");
         return -1;
@@ -263,7 +265,8 @@ BaseException_set_context(PyObject *self, PyObject *arg) {
 }
 
 static PyObject *
-BaseException_get_cause(PyObject *self) {
+BaseException_get_cause(PyObject *self, void *Py_UNUSED(ignored))
+{
     PyObject *res = PyException_GetCause(self);
     if (res)
         return res;  /* new reference already returned above */
@@ -271,7 +274,8 @@ BaseException_get_cause(PyObject *self) {
 }
 
 static int
-BaseException_set_cause(PyObject *self, PyObject *arg) {
+BaseException_set_cause(PyObject *self, PyObject *arg, void *Py_UNUSED(ignored))
+{
     if (arg == NULL) {
         PyErr_SetString(PyExc_TypeError, "__cause__ may not be deleted");
         return -1;
@@ -294,10 +298,10 @@ static PyGetSetDef BaseException_getset[] = {
     {"__dict__", PyObject_GenericGetDict, PyObject_GenericSetDict},
     {"args", (getter)BaseException_get_args, (setter)BaseException_set_args},
     {"__traceback__", (getter)BaseException_get_tb, (setter)BaseException_set_tb},
-    {"__context__", (getter)BaseException_get_context,
-     (setter)BaseException_set_context, PyDoc_STR("exception context")},
-    {"__cause__", (getter)BaseException_get_cause,
-     (setter)BaseException_set_cause, PyDoc_STR("exception cause")},
+    {"__context__", BaseException_get_context,
+     BaseException_set_context, PyDoc_STR("exception context")},
+    {"__cause__", BaseException_get_cause,
+     BaseException_set_cause, PyDoc_STR("exception cause")},
     {NULL},
 };
 
@@ -312,7 +316,7 @@ PyException_GetTraceback(PyObject *self) {
 
 int
 PyException_SetTraceback(PyObject *self, PyObject *tb) {
-    return BaseException_set_tb((PyBaseExceptionObject *)self, tb);
+    return BaseException_set_tb((PyBaseExceptionObject *)self, tb, NULL);
 }
 
 PyObject *
diff --git a/Objects/frameobject.c b/Objects/frameobject.c
index b7a16ad059..535ec46ee0 100644
--- a/Objects/frameobject.c
+++ b/Objects/frameobject.c
@@ -61,7 +61,7 @@ frame_getlineno(PyFrameObject *f, void *closure)
  *    that time.
  */
 static int
-frame_setlineno(PyFrameObject *f, PyObject* p_new_lineno)
+frame_setlineno(PyFrameObject *f, PyObject* p_new_lineno, void *Py_UNUSED(ignored))
 {
     int new_lineno = 0;                 /* The new value of f_lineno */
     long l_new_lineno;
@@ -521,7 +521,7 @@ frame_traverse(PyFrameObject *f, visitproc visit, void *arg)
     return 0;
 }
 
-static void
+static int
 frame_tp_clear(PyFrameObject *f)
 {
     PyObject **fastlocals, **p, **oldtop;
@@ -552,6 +552,7 @@ frame_tp_clear(PyFrameObject *f)
         for (p = f->f_valuestack; p < oldtop; p++)
             Py_CLEAR(*p);
     }
+    return 0;
 }
 
 static PyObject *
@@ -566,7 +567,7 @@ frame_clear(PyFrameObject *f)
         _PyGen_Finalize(f->f_gen);
         assert(f->f_gen == NULL);
     }
-    frame_tp_clear(f);
+    (void)frame_tp_clear(f);
     Py_RETURN_NONE;
 }
 
diff --git a/Objects/funcobject.c b/Objects/funcobject.c
index 6ce0cb43e5..e66fda3692 100644
--- a/Objects/funcobject.c
+++ b/Objects/funcobject.c
@@ -240,14 +240,14 @@ static PyMemberDef func_memberlist[] = {
 };
 
 static PyObject *
-func_get_code(PyFunctionObject *op)
+func_get_code(PyFunctionObject *op, void *Py_UNUSED(ignored))
 {
     Py_INCREF(op->func_code);
     return op->func_code;
 }
 
 static int
-func_set_code(PyFunctionObject *op, PyObject *value)
+func_set_code(PyFunctionObject *op, PyObject *value, void *Py_UNUSED(ignored))
 {
     Py_ssize_t nfree, nclosure;
 
@@ -275,14 +275,14 @@ func_set_code(PyFunctionObject *op, PyObject *value)
 }
 
 static PyObject *
-func_get_name(PyFunctionObject *op)
+func_get_name(PyFunctionObject *op, void *Py_UNUSED(ignored))
 {
     Py_INCREF(op->func_name);
     return op->func_name;
 }
 
 static int
-func_set_name(PyFunctionObject *op, PyObject *value)
+func_set_name(PyFunctionObject *op, PyObject *value, void *Py_UNUSED(ignored))
 {
     /* Not legal to del f.func_name or to set it to anything
      * other than a string object. */
@@ -297,14 +297,14 @@ func_set_name(PyFunctionObject *op, PyObject *value)
 }
 
 static PyObject *
-func_get_qualname(PyFunctionObject *op)
+func_get_qualname(PyFunctionObject *op, void *Py_UNUSED(ignored))
 {
     Py_INCREF(op->func_qualname);
     return op->func_qualname;
 }
 
 static int
-func_set_qualname(PyFunctionObject *op, PyObject *value)
+func_set_qualname(PyFunctionObject *op, PyObject *value, void *Py_UNUSED(ignored))
 {
     /* Not legal to del f.__qualname__ or to set it to anything
      * other than a string object. */
@@ -319,7 +319,7 @@ func_set_qualname(PyFunctionObject *op, PyObject *value)
 }
 
 static PyObject *
-func_get_defaults(PyFunctionObject *op)
+func_get_defaults(PyFunctionObject *op, void *Py_UNUSED(ignored))
 {
     if (op->func_defaults == NULL) {
         Py_INCREF(Py_None);
@@ -330,7 +330,7 @@ func_get_defaults(PyFunctionObject *op)
 }
 
 static int
-func_set_defaults(PyFunctionObject *op, PyObject *value)
+func_set_defaults(PyFunctionObject *op, PyObject *value, void *Py_UNUSED(ignored))
 {
     /* Legal to del f.func_defaults.
      * Can only set func_defaults to NULL or a tuple. */
@@ -347,7 +347,7 @@ func_set_defaults(PyFunctionObject *op, PyObject *value)
 }
 
 static PyObject *
-func_get_kwdefaults(PyFunctionObject *op)
+func_get_kwdefaults(PyFunctionObject *op, void *Py_UNUSED(ignored))
 {
     if (op->func_kwdefaults == NULL) {
         Py_INCREF(Py_None);
@@ -358,7 +358,7 @@ func_get_kwdefaults(PyFunctionObject *op)
 }
 
 static int
-func_set_kwdefaults(PyFunctionObject *op, PyObject *value)
+func_set_kwdefaults(PyFunctionObject *op, PyObject *value, void *Py_UNUSED(ignored))
 {
     if (value == Py_None)
         value = NULL;
@@ -375,7 +375,7 @@ func_set_kwdefaults(PyFunctionObject *op, PyObject *value)
 }
 
 static PyObject *
-func_get_annotations(PyFunctionObject *op)
+func_get_annotations(PyFunctionObject *op, void *Py_UNUSED(ignored))
 {
     if (op->func_annotations == NULL) {
         op->func_annotations = PyDict_New();
@@ -387,7 +387,7 @@ func_get_annotations(PyFunctionObject *op)
 }
 
 static int
-func_set_annotations(PyFunctionObject *op, PyObject *value)
+func_set_annotations(PyFunctionObject *op, PyObject *value, void *Py_UNUSED(ignored))
 {
     if (value == Py_None)
         value = NULL;
diff --git a/Objects/genobject.c b/Objects/genobject.c
index f226dbebaf..d1136301f0 100644
--- a/Objects/genobject.c
+++ b/Objects/genobject.c
@@ -665,14 +665,14 @@ gen_repr(PyGenObject *gen)
 }
 
 static PyObject *
-gen_get_name(PyGenObject *op)
+gen_get_name(PyGenObject *op, void *Py_UNUSED(ignored))
 {
     Py_INCREF(op->gi_name);
     return op->gi_name;
 }
 
 static int
-gen_set_name(PyGenObject *op, PyObject *value)
+gen_set_name(PyGenObject *op, PyObject *value, void *Py_UNUSED(ignored))
 {
     /* Not legal to del gen.gi_name or to set it to anything
      * other than a string object. */
@@ -687,14 +687,14 @@ gen_set_name(PyGenObject *op, PyObject *value)
 }
 
 static PyObject *
-gen_get_qualname(PyGenObject *op)
+gen_get_qualname(PyGenObject *op, void *Py_UNUSED(ignored))
 {
     Py_INCREF(op->gi_qualname);
     return op->gi_qualname;
 }
 
 static int
-gen_set_qualname(PyGenObject *op, PyObject *value)
+gen_set_qualname(PyGenObject *op, PyObject *value, void *Py_UNUSED(ignored))
 {
     /* Not legal to del gen.__qualname__ or to set it to anything
      * other than a string object. */
@@ -709,7 +709,7 @@ gen_set_qualname(PyGenObject *op, PyObject *value)
 }
 
 static PyObject *
-gen_getyieldfrom(PyGenObject *gen)
+gen_getyieldfrom(PyGenObject *gen, void *Py_UNUSED(ignored))
 {
     PyObject *yf = _PyGen_yf(gen);
     if (yf == NULL)
@@ -944,7 +944,7 @@ coro_await(PyCoroObject *coro)
 }
 
 static PyObject *
-coro_get_cr_await(PyCoroObject *coro)
+coro_get_cr_await(PyCoroObject *coro, void *Py_UNUSED(ignored))
 {
     PyObject *yf = _PyGen_yf((PyGenObject *) coro);
     if (yf == NULL)
diff --git a/Objects/memoryobject.c b/Objects/memoryobject.c
index e1ac728178..30e0055479 100644
--- a/Objects/memoryobject.c
+++ b/Objects/memoryobject.c
@@ -2903,7 +2903,7 @@ _IntTupleFromSsizet(int len, Py_ssize_t *vals)
 }
 
 static PyObject *
-memory_obj_get(PyMemoryViewObject *self)
+memory_obj_get(PyMemoryViewObject *self, void *Py_UNUSED(ignored))
 {
     Py_buffer *view = &self->view;
 
@@ -2916,56 +2916,56 @@ memory_obj_get(PyMemoryViewObject *self)
 }
 
 static PyObject *
-memory_nbytes_get(PyMemoryViewObject *self)
+memory_nbytes_get(PyMemoryViewObject *self, void *Py_UNUSED(ignored))
 {
     CHECK_RELEASED(self);
     return PyLong_FromSsize_t(self->view.len);
 }
 
 static PyObject *
-memory_format_get(PyMemoryViewObject *self)
+memory_format_get(PyMemoryViewObject *self, void *Py_UNUSED(ignored))
 {
     CHECK_RELEASED(self);
     return PyUnicode_FromString(self->view.format);
 }
 
 static PyObject *
-memory_itemsize_get(PyMemoryViewObject *self)
+memory_itemsize_get(PyMemoryViewObject *self, void *Py_UNUSED(ignored))
 {
     CHECK_RELEASED(self);
     return PyLong_FromSsize_t(self->view.itemsize);
 }
 
 static PyObject *
-memory_shape_get(PyMemoryViewObject *self)
+memory_shape_get(PyMemoryViewObject *self, void *Py_UNUSED(ignored))
 {
     CHECK_RELEASED(self);
     return _IntTupleFromSsizet(self->view.ndim, self->view.shape);
 }
 
 static PyObject *
-memory_strides_get(PyMemoryViewObject *self)
+memory_strides_get(PyMemoryViewObject *self, void *Py_UNUSED(ignored))
 {
     CHECK_RELEASED(self);
     return _IntTupleFromSsizet(self->view.ndim, self->view.strides);
 }
 
 static PyObject *
-memory_suboffsets_get(PyMemoryViewObject *self)
+memory_suboffsets_get(PyMemoryViewObject *self, void *Py_UNUSED(ignored))
 {
     CHECK_RELEASED(self);
     return _IntTupleFromSsizet(self->view.ndim, self->view.suboffsets);
 }
 
 static PyObject *
-memory_readonly_get(PyMemoryViewObject *self)
+memory_readonly_get(PyMemoryViewObject *self, void *Py_UNUSED(ignored))
 {
     CHECK_RELEASED(self);
     return PyBool_FromLong(self->view.readonly);
 }
 
 static PyObject *
-memory_ndim_get(PyMemoryViewObject *self)
+memory_ndim_get(PyMemoryViewObject *self, void *Py_UNUSED(ignored))
 {
     CHECK_RELEASED(self);
     return PyLong_FromLong(self->view.ndim);
diff --git a/Python/traceback.c b/Python/traceback.c
index 145d028ba3..f489a47276 100644
--- a/Python/traceback.c
+++ b/Python/traceback.c
@@ -65,11 +65,12 @@ tb_traverse(PyTracebackObject *tb, visitproc visit, void *arg)
     return 0;
 }
 
-static void
+static int
 tb_clear(PyTracebackObject *tb)
 {
     Py_CLEAR(tb->tb_next);
     Py_CLEAR(tb->tb_frame);
+    return 0;
 }
 
 PyTypeObject PyTraceBack_Type = {