Merged revisions 81823,81835 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

................
  r81823 | benjamin.peterson | 2010-06-07 17:31:26 -0500 (Mon, 07 Jun 2010) | 9 lines

  Merged revisions 81820 via svnmerge from
  svn+ssh://pythondev@svn.python.org/python/trunk

  ........
    r81820 | benjamin.peterson | 2010-06-07 17:23:23 -0500 (Mon, 07 Jun 2010) | 1 line

    correctly overflow when indexes are too large
  ........
................
  r81835 | benjamin.peterson | 2010-06-08 09:57:22 -0500 (Tue, 08 Jun 2010) | 9 lines

  Merged revisions 81834 via svnmerge from
  svn+ssh://pythondev@svn.python.org/python/trunk

  ........
    r81834 | benjamin.peterson | 2010-06-08 09:53:29 -0500 (Tue, 08 Jun 2010) | 1 line

    kill extra word
  ........
................
diff --git a/Lib/test/test_unicode.py b/Lib/test/test_unicode.py
index 6e4f048..75637f8 100644
--- a/Lib/test/test_unicode.py
+++ b/Lib/test/test_unicode.py
@@ -687,6 +687,9 @@
         self.assertRaises(IndexError, "{:}".format)
         self.assertRaises(IndexError, "{:s}".format)
         self.assertRaises(IndexError, "{}".format)
+        big = "23098475029384702983476098230754973209482573"
+        self.assertRaises(ValueError, ("{" + big + "}").format)
+        self.assertRaises(ValueError, ("{[" + big + "]}").format, [0])
 
         # issue 6089
         self.assertRaises(ValueError, "{0[0]x}".format, [None])