bpo-37493: use _PyObject_CallNoArg in more places (GH-14575)

Doc/extending/newtypes.rst

@@ -104,7 +104,7 @@ done.  This can be done using the :c:func:`PyErr_Fetch` and
            /* This saves the current exception state */
            PyErr_Fetch(&err_type, &err_value, &err_traceback);
 
-           cbresult = PyObject_CallObject(self->my_callback, NULL);
+           cbresult = PyObject_CallNoArgs(self->my_callback);
            if (cbresult == NULL)
                PyErr_WriteUnraisable(self->my_callback);
            else

Modules/_collectionsmodule.c

@@ -1976,7 +1976,7 @@ defdict_missing(defdictobject *dd, PyObject *key)
         Py_DECREF(tup);
         return NULL;
     }
-    value = PyEval_CallObject(factory, NULL);
+    value = _PyObject_CallNoArg(factory);
     if (value == NULL)
         return value;
     if (PyObject_SetItem((PyObject *)dd, key, value) < 0) {

Modules/_ctypes/_ctypes.c

@@ -1001,8 +1001,8 @@ PyCPointerType_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
   stgdict items size, align, length contain info about pointers itself,
   stgdict->proto has info about the pointed to type!
 */
-    stgdict = (StgDictObject *)PyObject_CallObject(
-        (PyObject *)&PyCStgDict_Type, NULL);
+    stgdict = (StgDictObject *)_PyObject_CallNoArg(
+        (PyObject *)&PyCStgDict_Type);
     if (!stgdict)
         return NULL;
     stgdict->size = sizeof(void *);
@@ -1489,8 +1489,8 @@ PyCArrayType_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
         goto error;
     }
 
-    stgdict = (StgDictObject *)PyObject_CallObject(
-        (PyObject *)&PyCStgDict_Type, NULL);
+    stgdict = (StgDictObject *)_PyObject_CallNoArg(
+        (PyObject *)&PyCStgDict_Type);
     if (!stgdict)
         goto error;
 
@@ -1946,8 +1946,8 @@ static PyObject *CreateSwappedType(PyTypeObject *type, PyObject *args, PyObject
     if (result == NULL)
         return NULL;
 
-    stgdict = (StgDictObject *)PyObject_CallObject(
-        (PyObject *)&PyCStgDict_Type, NULL);
+    stgdict = (StgDictObject *)_PyObject_CallNoArg(
+        (PyObject *)&PyCStgDict_Type);
     if (!stgdict) {
         Py_DECREF(result);
         return NULL;
@@ -2060,8 +2060,8 @@ PyCSimpleType_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
         goto error;
     }
 
-    stgdict = (StgDictObject *)PyObject_CallObject(
-        (PyObject *)&PyCStgDict_Type, NULL);
+    stgdict = (StgDictObject *)_PyObject_CallNoArg(
+        (PyObject *)&PyCStgDict_Type);
     if (!stgdict)
         goto error;
 
@@ -2454,8 +2454,8 @@ PyCFuncPtrType_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
     PyTypeObject *result;
     StgDictObject *stgdict;
 
-    stgdict = (StgDictObject *)PyObject_CallObject(
-        (PyObject *)&PyCStgDict_Type, NULL);
+    stgdict = (StgDictObject *)_PyObject_CallNoArg(
+        (PyObject *)&PyCStgDict_Type);
     if (!stgdict)
         return NULL;
 

Modules/_ctypes/cfield.c

@@ -60,8 +60,7 @@ PyCField_FromDesc(PyObject *desc, Py_ssize_t index,
 #define CONT_BITFIELD 2
 #define EXPAND_BITFIELD 3
 
-    self = (CFieldObject *)PyObject_CallObject((PyObject *)&PyCField_Type,
-                                               NULL);
+    self = (CFieldObject *)_PyObject_CallNoArg((PyObject *)&PyCField_Type);
     if (self == NULL)
         return NULL;
     dict = PyType_stgdict(desc);

Modules/_testcapimodule.c

@@ -4907,7 +4907,7 @@ bad_get(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
         return NULL;
     }
 
-    PyObject *res = PyObject_CallObject(cls, NULL);
+    PyObject *res = _PyObject_CallNoArg(cls);
     if (res == NULL) {
         return NULL;
     }

Modules/posixmodule.c

@@ -433,7 +433,7 @@ run_at_forkers(PyObject *lst, int reverse)
             for (i = 0; i < PyList_GET_SIZE(cpy); i++) {
                 PyObject *func, *res;
                 func = PyList_GET_ITEM(cpy, i);
-                res = PyObject_CallObject(func, NULL);
+                res = _PyObject_CallNoArg(func);
                 if (res == NULL)
                     PyErr_WriteUnraisable(func);
                 else