def rollback(using=None):
    if using is None:
        using = DEFAULT_DB_ALIAS
    connection = connections[using]
    connection.rollback()
A zipfile entry with a different filename than is found in the central
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/db/transaction.py/rollback--crossover with--dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/python/test/test_zipstream.py/ZipstreamTest.test_filenameMismatch