Index: Lib/json/tests/test_scanstring.py
===================================================================
--- Lib/json/tests/test_scanstring.py	(révision 72287)
+++ Lib/json/tests/test_scanstring.py	(copie de travail)
@@ -107,3 +107,6 @@
                           "xxx")
         self.assertRaises(UnicodeDecodeError,
                           json.encoder.encode_basestring_ascii, b"xx\xff")
+
+    def test_overflow(self):
+        self.assertRaises(OverflowError, json.decoder.scanstring, b"xxx", sys.maxsize+1)
--- Modules/_json.c.orig	2009-05-05 02:21:09.000000000 +0200
+++ Modules/_json.c	2009-05-05 02:20:54.000000000 +0200
@@ -143,9 +143,9 @@
 {
     /* PyObject to Py_ssize_t converter */
     *size_ptr = PyInt_AsSsize_t(o);
-    if (*size_ptr == -1 && PyErr_Occurred());
-        return 1;
-    return 0;
+    if (*size_ptr == -1 && PyErr_Occurred())
+        return 0;
+    return 1;
 }

 static PyObject *