@@ -737,8 +737,10 @@ setup_context(Py_ssize_t stack_level, PyObject **filename, int *lineno,
         int kind;
         void *data;
 
-        if (PyUnicode_READY(*filename))
+        if (PyUnicode_READY(*filename)) {
+            Py_DECREF(*filename);
             goto handle_error;
+        }
 
         len = PyUnicode_GetLength(*filename);
         kind = PyUnicode_KIND(*filename);
@@ -761,7 +763,7 @@ setup_context(Py_ssize_t stack_level, PyObject **filename, int *lineno,
             Py_INCREF(*filename);
     }
     else {
-        *filename = NULL;
+        Py_CLEAR(*filename);
         if (*module != Py_None && _PyUnicode_EqualToASCIIString(*module, "__main__")) {
             PyObject *argv = _PySys_GetObjectId(&PyId_argv);
             /* PyList_Check() is needed because sys.argv is set to None during