[issue36221] Setting PYTHONASYNCIODEBUG breaks warnings

[Alexey Kostyrin]

Alexey Kostyrin <alex.kostirin at gmail.com> added the comment:

Can not reproduce - warning is displayed with PYTHONASYNCIODEBUG=1 
Python version:
Python 3.8.0b1+ (heads/3.8:3f7629d93c, Jun 10 2019, 13:46:55) 
[Clang 10.0.0 (clang-1000.10.44.4)] on darwin

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nosy: +def_bk

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<https://bugs.python.org/issue36221>
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