Spurious test failure in emailaddress.txt.

I had this failure (or is it an error?) during ec2test that I could not reproduce locally, so I disabled the test. Here is the mail.

Tests started at approximately Wed, 03 Jun 2009 15:18:13 UTC
bzr+ssh://bazaar.launchpad.net/%7Elaunchpad-pqm/launchpad/devel/, revision 8513

Failure in test lib/canonical/launchpad/ftests/../doc/emailaddress.txt
Failed doctest test for emailaddress.txt
  File "lib/canonical/launchpad/ftests/../doc/emailaddress.txt", line 0

----------------------------------------------------------------------
File "lib/canonical/launchpad/ftests/../doc/emailaddress.txt", line 10, in emailaddress.txt
Failed example:
    person = factory.makePerson()
Exception raised:
    Traceback (most recent call last):
      File "/var/launchpad/test/lib/zope/testing/doctest.py", line 1360, in __run
        compileflags, 1) in test.globs
      File "<doctest emailaddress.txt[3]>", line 1, in ?
        person = factory.makePerson()
      File "/var/launchpad/test/lib/lp/testing/factory.py", line 126, in with_default_master_store
        return func(*args, **kw)
      File "/var/launchpad/test/lib/lp/testing/factory.py", line 238, in makePerson
        person = self.makePersonNoCommit(*args, **kwargs)
      File "/var/launchpad/test/lib/lp/testing/factory.py", line 126, in with_default_master_store
        return func(*args, **kw)
      File "/var/launchpad/test/lib/lp/testing/factory.py", line 292, in makePersonNoCommit
        hide_email_addresses=hide_email_addresses)
      File "/var/launchpad/test/lib/lp/registry/model/person.py", line 2400, in createPersonAndEmail
        comment=comment, registrant=registrant, account=account)
      File "/var/launchpad/test/lib/lp/registry/model/person.py", line 2439, in _newPerson
        account_id = account.id
      File "/var/launchpad/test/lib/storm/properties.py", line 60, in __get__
        return obj_info.variables[column].get()
      File "/var/launchpad/test/lib/storm/store.py", line 866, in _resolve_lazy_value
        self.flush()
      File "/var/launchpad/test/lib/storm/store.py", line 484, in flush
        self._flush_one(obj_info)
      File "/var/launchpad/test/lib/storm/store.py", line 521, in _flush_one
        result = self._connection.execute(expr)
      File "/var/launchpad/test/lib/storm/databases/postgres.py", line 251, in execute
        result = Connection.execute(self, Returning(statement), params)
      File "/var/launchpad/test/lib/storm/database.py", line 200, in execute
        raw_cursor = self.raw_execute(statement, params)
      File "/var/launchpad/test/lib/storm/databases/postgres.py", line 267, in raw_execute
        return Connection.raw_execute(self, statement, params)
      File "/var/launchpad/test/lib/storm/database.py", line 282, in raw_execute
        self._check_disconnect(raw_cursor.execute, *args)
      File "/var/launchpad/test/lib/storm/database.py", line 325, in _check_disconnect
        return function(*args, **kwargs)
      File "/var/launchpad/test/lib/canonical/ftests/pgsql.py", line 106, in execute
        return self.real_cursor.execute(*args, **kwargs)
    IntegrityError: duplicate key value violates unique constraint "account_pkey"