$ LANG=ISO-8859-15 ./python -m test.regrtest test_doctest
[1/1] test_doctest
**********************************************************************
File "/home/antoine/py3k/__svn__/Lib/test/test_doctest.py", line 1676, in test.test_doctest.test_debug
Failed example:
    try: doctest.debug_src(s)
    finally: sys.stdin = real_stdin
Expected:
    > <string>(1)<module>()
    (Pdb) next
    12
    --Return--
    > <string>(1)<module>()->None
    (Pdb) print(x)
    12
    (Pdb) continue
Got:
    > /home/antoine/py3k/__svn__/Lib/encodings/iso8859_15.py(15)decode()
    -> return codecs.charmap_decode(input,errors,decoding_table)
    (Pdb) next
    --Return--
    > /home/antoine/py3k/__svn__/Lib/encodings/iso8859_15.py(15)decode()->('<string>', 8)
    -> return codecs.charmap_decode(input,errors,decoding_table)
    (Pdb) print(x)
    *** NameError: name 'x' is not defined
    (Pdb) continue
    12
**********************************************************************
1 items had failures:
   1 of   4 in test.test_doctest.test_debug
***Test Failed*** 1 failures.
test test_doctest failed -- 1 of 429 doctests failed
1 test failed:
    test_doctest


Also visible on the following buildbot:
http://www.python.org/dev/buildbot/all/builders/x86%20debian%20parallel%203.x/builds/934/steps/test/logs/stdio