I also am getting the death bug mentioned above. Same error:
DEBUG: Could not make ‘./memorial/Yatesville/’ directory
Function void game::write_memorial_file(std::string)
File src/game.cpp
Line 3741
Windows 10 x64, latest experimental (but has happened for a few days now).
Happens on worlds with and without spaces, and on characters with very simple names (this one was Bob). Must be some windows 10 related goof as you said, if you need me to try anything else to help you debug it just say =)
EDIT: Your message saying you’d found the bug only just showed up - teaches me a lesson for leaving the web page open for hours without refreshing. Can confirm making the directory fixes it =)!