From 39013cd4c0f76b7b6c34efe4e341618f0ad2027a Mon Sep 17 00:00:00 2001
From: Thomas Heller <theller@ctypes.org>
Date: Wed, 24 Oct 2007 19:37:27 +0000
Subject: [PATCH] A 'PyObject *' parameter in PyErr_Format must use %S
 parameter, not %s.

Added unittest for calling a function with paramflags.
---
 Lib/ctypes/test/test_prototypes.py | 18 ++++++++++++++++++
 Modules/_ctypes/_ctypes.c          |  2 +-
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/Lib/ctypes/test/test_prototypes.py b/Lib/ctypes/test/test_prototypes.py
index 91b7e0da7d0..e098e7bd728 100644
--- a/Lib/ctypes/test/test_prototypes.py
+++ b/Lib/ctypes/test/test_prototypes.py
@@ -48,6 +48,24 @@ class CharPointersTestCase(unittest.TestCase):
         func.restype = c_long
         func.argtypes = None
 
+    def test_paramflags(self):
+        # function returns c_void_p result,
+        # and has a required parameter named 'input'
+        prototype = CFUNCTYPE(c_void_p, c_void_p)
+        func = prototype(("_testfunc_p_p", testdll),
+                         ((1, "input"),))
+
+        try:
+            func()
+        except TypeError as details:
+            self.failUnlessEqual(str(details), "required argument 'input' missing")
+        else:
+            self.fail("TypeError not raised")
+
+        self.failUnlessEqual(func(None), None)
+        self.failUnlessEqual(func(input=None), None)
+
+
     def test_int_pointer_arg(self):
         func = testdll._testfunc_p_p
         func.restype = c_long
diff --git a/Modules/_ctypes/_ctypes.c b/Modules/_ctypes/_ctypes.c
index f92263030b5..81276faa5d4 100644
--- a/Modules/_ctypes/_ctypes.c
+++ b/Modules/_ctypes/_ctypes.c
@@ -2992,7 +2992,7 @@ _get_arg(int *pindex, PyObject *name, PyObject *defval, PyObject *inargs, PyObje
 	/* we can't currently emit a better error message */
 	if (name)
 		PyErr_Format(PyExc_TypeError,
-			     "required argument '%s' missing", name);
+			     "required argument '%S' missing", name);
 	else
 		PyErr_Format(PyExc_TypeError,
 			     "not enough arguments");