# HG changeset patch
# User MRAB <regex@mrabarnett.plus.com>
# Date 1356887255 0
# Node ID ea20006badc19207dfa8bd179a9724f9c2a842ac
# Parent  ffce7af849a4e6a5c3af4ccac7c7460e44ad080e
Small addition to issue #16741

diff -r ffce7af849a4 -r ea20006badc1 Objects/longobject.c
--- a/Objects/longobject.c	Sun Dec 30 02:35:37 2012 +0000
+++ b/Objects/longobject.c	Sun Dec 30 17:07:35 2012 +0000
@@ -2268,7 +2268,7 @@
     if (slen > 200) {
         slen = 200;
         /* Don't truncate in the middle of a UTF-8 multibyte sequence. */
-        while ((str[slen] & 0xC0) == 0x80)
+        while (slen > 0 && (str[slen] & 0xC0) == 0x80)
             slen--;
     }
     strobj = PyUnicode_FromStringAndSize(str, slen);