https://bugs.winehq.org/show_bug.cgi?id=37962
--- Comment #11 from gentoo@gishpuppy.com --- (In reply to Sebastian Lackner from comment #9)
ws2_32 is unloaded while there is still an async callback pending. I assume we have to hold a reference to the library while callbacks are still active (if it doesn't crash on Windows).
I used WebMon a couple of years ago on Windows and didn't see any crash. Today I tested it thoroughly again and I can confirm that it works fine on Windows.
If I should check something else on Windows or test a patch for Wine, please let me know.