From 5e61f14c6dd29982da9364696bc864604b143a66 Mon Sep 17 00:00:00 2001
From: Serhiy Storchaka <storchaka@gmail.com>
Date: Sun, 10 Feb 2013 17:36:00 +0200
Subject: Issue #12983: Bytes literals with invalid \x escape now raise a
 SyntaxError and a full traceback including line number.

---
 Objects/bytesobject.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'Objects')

diff --git a/Objects/bytesobject.c b/Objects/bytesobject.c
index b60a8b06c3..cb5679bc38 100644
--- a/Objects/bytesobject.c
+++ b/Objects/bytesobject.c
@@ -469,8 +469,9 @@ PyObject *PyBytes_DecodeEscape(const char *s,
                 break;
             }
             if (!errors || strcmp(errors, "strict") == 0) {
-                PyErr_SetString(PyExc_ValueError,
-                                "invalid \\x escape");
+                PyErr_Format(PyExc_ValueError,
+                             "invalid \\x escape at position %d",
+                              s - 2 - (end - len));
                 goto failed;
             }
             if (strcmp(errors, "replace") == 0) {
-- 
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