Update

Author: corona10

Lib/test/clinic.test.c

@@ -4988,18 +4988,18 @@ Test.property
 #   define TEST_PROPERTY_GETSETTERDEF {"property", NULL, (setter)Test_property_set, NULL},
 #endif
 
-static PyObject *
+static int
 Test_property_set_impl(TestObj *self, PyObject *value);
 
-static PyObject *
+static int
 Test_property_set(TestObj *self, PyObject *value, void *Py_UNUSED(context))
 {
     return Test_property_set_impl(self, value);
 }
 
-static PyObject *
+static int
 Test_property_set_impl(TestObj *self, PyObject *value)
-/*[clinic end generated code: output=2ba2d4de6020e191 input=3bc3f46a23c83a88]*/
+/*[clinic end generated code: output=e57ae784a4e3382a input=3bc3f46a23c83a88]*/
 
 /*[clinic input]
 output push

Modules/_io/clinic/textio.c.h

@@ -3258,9 +3258,9 @@ _io_TextIOWrapper__CHUNK_SIZE_get_impl(textio *self)
 _io.TextIOWrapper._CHUNK_SIZE
 [clinic start generated code]*/
 
-static PyObject *
+static int
 _io_TextIOWrapper__CHUNK_SIZE_set_impl(textio *self, PyObject *value)
-/*[clinic end generated code: output=0d4fc49ae6b8eb87 input=32fc99861db02a0a]*/
+/*[clinic end generated code: output=edb86d2db660a5ab input=32fc99861db02a0a]*/
 {
     Py_ssize_t n;
     CHECK_ATTACHED_INT(self);

Modules/_io/textio.c

@@ -851,7 +851,7 @@ class CLanguage(Language):
         {c_basename}({self_type}{self_name}, void *Py_UNUSED(context))
     """)
     PARSER_PROTOTYPE_SETTER: Final[str] = normalize_snippet("""
-        static PyObject *
+        static int
         {c_basename}({self_type}{self_name}, PyObject *value, void *Py_UNUSED(context))
     """)
     METH_O_PROTOTYPE: Final[str] = normalize_snippet("""
@@ -1189,6 +1189,7 @@ def output_templates(
             methoddef_define = self.GETTERDEF_PROTOTYPE_DEFINE
             docstring_prototype = docstring_definition = ''
         elif f.kind is SETTER:
+            return_value_declaration = "int return_value;"
             methoddef_define = self.SETTERDEF_PROTOTYPE_DEFINE
             docstring_prototype = docstring_prototype = docstring_definition = ''
         else:
@@ -1992,7 +1993,10 @@ def render_function(
             converter.set_template_dict(template_dict)
 
         f.return_converter.render(f, data)
-        template_dict['impl_return_type'] = f.return_converter.type
+        if f.kind is SETTER:
+            template_dict['impl_return_type'] = 'int'
+        else:
+            template_dict['impl_return_type'] = f.return_converter.type
 
         template_dict['declarations'] = format_escape("\n".join(data.declarations))
         template_dict['initializers'] = "\n\n".join(data.initializers)