Comment 6 for bug 1907970

Thanks for the fix, hoping to try it out later!

I also discovered that apparently Windows 10 has a workaround for this issue, which is an option under

Language Settings/Administrative Language Settings/Change System Locale/Beta: Use Unicode UTF-8 for worldwide language support

Turning on this option (and restarting) magically makes even pre-existing executables accept Unicode text. I think it even fixes another SBCL/Unicode issue on Windows: https://bugs.launchpad.net/sbcl/+bug/1267540