https://bugs.winehq.org/show_bug.cgi?id=43475
--- Comment #1 from Sagawa sagawa.aki+winebugs@gmail.com --- Created attachment 58858 --> https://bugs.winehq.org/attachment.cgi?id=58858 proposed patch
My inspection shows that this issue caused by mbstowcs(). When the second argument is empty (""), the function doesn't work well.
I attach a proposed patch.