[issue28369] Raise RuntimeError when transport's FD is used with add_reader etc

[Roundup Robot]

Roundup Robot added the comment:

New changeset 2b502f624753 by Yury Selivanov in branch '3.5':
Issue #28369: Raise an error when transport's FD is used with add_reader
https://hg.python.org/cpython/rev/2b502f624753

New changeset f3c1d8869dd5 by Yury Selivanov in branch '3.6':
Merge 3.5 (issue #28369)
https://hg.python.org/cpython/rev/f3c1d8869dd5

New changeset 745e0ff513c2 by Yury Selivanov in branch 'default':
Merge 3.6 (issue #28369)
https://hg.python.org/cpython/rev/745e0ff513c2

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nosy: +python-dev

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<http://bugs.python.org/issue28369>
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