[issue27100] Attempting to use class with both __enter__ & __exit__ undefined yields __exit__ attribute error

[Raymond Hettinger]

Changes by Raymond Hettinger <raymond.hettinger at gmail.com>:


Added file: http://bugs.python.org/file45604/fix_with_refleak.diff

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue27100>
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