Actual tip:
changeset: 87276:2012e85638d9
date: Tue Nov 19 11:43:38 2013 -0800

It's a fresh clone, then:
make clean
./configure --with-pydebug
make -j4
./python -OO -m test -v test_email

== CPython 3.4.0a4+ (default:2012e85638d9, Nov 19 2013, 22:40:39) [GCC 4.7.2]
==   Linux-3.2.0-4-amd64-x86_64-with-debian-7.2 little-endian
==   /home/ci/Prog/cpython_test/cpython/build/test_python_30828
Testing with flags: sys.flags(debug=0, inspect=0, interactive=0, optimize=2, dont_write_bytecode=0, no_user_site=0, no_site=0, igno
re_environment=0, verbose=0, bytes_warning=0, quiet=0, hash_randomization=1, isolated=0)
[1/1] test_email
test_b_case_ignored (test__encoded_words.TestDecode) ... ok
....
and so on
....

Ran 1516 tests in 8.313s

OK (skipped=1)
1 test OK.