parser: fix usage of Py_BuildValue() to build a parser error

Fix typo: "os" format => "Os"

diff --git a/Modules/parsermodule.c b/Modules/parsermodule.c
index e86fe4d2eb58076a9cf944c3d72d8531852be83a..e598046074fe584f5f5d0dab52b5fe306e3918e0 100644 (file)
--- a/Modules/parsermodule.c
+++ b/Modules/parsermodule.c
@@ -748,7 +748,7 @@ build_node_children(PyObject *tuple, node *root, int *line_num)
             }
         }
         if (!ok) {
-            PyObject *err = Py_BuildValue("os", elem,
+            PyObject *err = Py_BuildValue("Os", elem,
                                           "Illegal node construct.");
             PyErr_SetObject(parser_error, err);
             Py_XDECREF(err);