[issue28649] refleak in typing.py

[Yury Selivanov]

Yury Selivanov added the comment:

Wow. In default CPython branch, with no modifications, test_typing.py simply crashes in debug mode:

yury at ysmbp ~/dev/py/cpython $ ./python.exe -m test -R3:3 test_typing
Run tests sequentially
0:00:00 [1/1] test_typing
beginning 6 repetitions
123456
.test test_typing failed -- Traceback (most recent call last):
  File "/Users/yury/dev/py/cpython/Lib/test/test_typing.py", line 739, in test_generic_forvard_ref
    self.assertEqual(get_type_hints(foobar, globals(), locals()), {'x': List[List[T]]})
AssertionError: {'x': typing.List[typing.List[~T]]} != {'x': typing.List[typing.List[~T]]}
  {'x': typing.List[typing.List[~T]]}

test_typing failed

1 test failed:
    test_typing

Total duration: 1 sec
Tests result: FAILURE

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28649>
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