From 91a639a094978882caef91915c932fbb2fc347de Mon Sep 17 00:00:00 2001
From: Inada Naoki <songofacandy@gmail.com>
Date: Mon, 22 Feb 2021 22:11:48 +0900
Subject: bpo-36346: Emit DeprecationWarning for PyArg_Parse() with 'u' or 'Z'.
 (GH-20927)

Emit DeprecationWarning when PyArg_Parse*() is called with 'u', 'Z' format.

See PEP 623.
---
 Python/getargs.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'Python/getargs.c')

diff --git a/Python/getargs.c b/Python/getargs.c
index 8839492e5e..936eb6a89a 100644
--- a/Python/getargs.c
+++ b/Python/getargs.c
@@ -1014,7 +1014,10 @@ convertsimple(PyObject *arg, const char **p_format, va_list *p_va, int flags,
     case 'u': /* raw unicode buffer (Py_UNICODE *) */
     case 'Z': /* raw unicode buffer or None */
     {
-        // TODO: Raise DeprecationWarning
+        if (PyErr_WarnFormat(PyExc_DeprecationWarning, 1,
+                "getargs: The '%c' format is deprecated. Use 'U' instead.", c)) {
+            return NULL;
+        }
 _Py_COMP_DIAG_PUSH
 _Py_COMP_DIAG_IGNORE_DEPR_DECLS
         Py_UNICODE **p = va_arg(*p_va, Py_UNICODE **);
-- 
cgit v1.2.1