[issue3660] reference leaks in 3.0

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

Current status:

test_distutils leaked [141, 142] references, sum=283
test_logging leaked [0, -219] references, sum=-219
test_smtplib leaked [0, 87] references, sum=87

The distutils leak should be investigated, but the overall situation is
rather good now. The other, transient, leaks might be due to some thread
being cleaned up too late or something.

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priority: release blocker -> high

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue3660>
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