TypeError when creating Lock.

[Stephen A. Goss]

I saw this message while running Mailman 3:

  File "/home/sgoss/phoenix-deploy/lib/python2.6/site-packages/flufl.lock-2.1-py2.6.egg/flufl/lock/_lockfile.py", line 345, in __enter__
    self.lock()
  File "/home/sgoss/phoenix-deploy/lib/python2.6/site-packages/flufl.lock-2.1-py2.6.egg/flufl/lock/_lockfile.py", line 273, in lock
    datetime.datetime.now() > self._releasetime + CLOCK_SLOP):
TypeError: unsupported operand type(s) for +: 'int' and 'datetime.timedelta'

This code failed since _releasetime is a property and can change between the first and second access here:

            if (self._releasetime != -1 and
                datetime.datetime.now() > self._releasetime + CLOCK_SLOP):

[Barry Warsaw (barry)]

Good catch! The fix is easy, but I want to see if I can think of a test.