[issue28802] Python 3.6.0b4 Reports ncurses present in Cygwin but fails to build for cygwin

[Masayuki Yamamoto]

New submission from Masayuki Yamamoto:

We're discussing a cause of this issue at #25720.

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nosy: +masamoto

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28802>
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