https://bugs.winehq.org/show_bug.cgi?id=46303
--- Comment #4 from Piotr Caban piotr.caban@gmail.com --- Created attachment 63306 --> https://bugs.winehq.org/attachment.cgi?id=63306 patch that adds debug messages to toupper
Could you please collect an msvcrt,tid,pid log using current wine with attached patch? It adds trace messages to toupper_l function.