https://bugs.winehq.org/show_bug.cgi?id=49295
--- Comment #5 from Gijs Vermeulen gijsvrm@gmail.com --- (In reply to Alexandre Julliard from comment #4)
Created attachment 67299 [details] Missing init
I guess it's Mac-specific then. Does this help?
I created a prefix about 10 times and did not encounter to issue, so it does seem to fix it.