[issue30256] Adding a SyncManager Queue proxy to a SyncManager dict or Namespace proxy raises an exception

[Hrvoje Nikšić]

Hrvoje Nikšić <hniksic at gmail.com> added the comment:

The issue is also present in Python 3.7.0b1.

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versions: +Python 3.7

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue30256>
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