Intermittent test failure in twisted.mail.test.test_mail.MaildirAppendStringTestCase.testAppend

New submission from ivank <[email protected]>:

After about 500 runs (new process each time, not `trial -u`), it failed:

{{{
===============================================================================
[FAIL]: twisted.mail.test.test_mail.MaildirAppendStringTestCase.testAppend

Traceback (most recent call last):
  File "/opt/Python-latest/lib/python2.7/site-packages/twisted/mail/test/test_mail.py", line 371, in _cbTestAppend
    self.assertEquals(len(mbox.getMessage(5).read()), 6)
twisted.trial.unittest.FailTest: not equal:
a = 3
b = 6
}}}

I also saw a failure with these numbers:

{{{
===============================================================================
[FAIL]: twisted.mail.test.test_mail.MaildirAppendStringTestCase.testAppend

Traceback (most recent call last):
  File "/opt/Python-latest/lib/python2.7/site-packages/twisted/mail/test/test_mail.py", line 371, in _cbTestAppend
    self.assertEquals(len(mbox.getMessage(5).read()), 6)
twisted.trial.unittest.FailTest: not equal:
a = 9
b = 6
}}}

select reactor, Twisted trunk r26989, Python 2.7r73314 on Ubuntu 9.04 server 64-bit

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Type     : defect
Component: mail
Keywords : 
Priority : normal
Nosy     : 
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http://twistedmatrix.com/trac/ticket/3877