https://bugs.winehq.org/show_bug.cgi?id=56927
--- Comment #1 from Bernhard Übelacker bernhardu@mailbox.org --- Created attachment 76750 --> https://bugs.winehq.org/attachment.cgi?id=76750 Workaround: Do not fail in closesocket for unknown socket.
Installing and testing cygwin64/msys2-64 was done with a wine tree including patches for this bugs: 52105, 55138, 53574, 54995, 56925