http://bugs.winehq.org/show_bug.cgi?id=58247
--- Comment #2 from xnep1@hotmail.com --- (In reply to mata from comment #1)
This reads like it's related to https://bugs.winehq.org/show_bug.cgi?id=57097
The "workaround" there is to set LC_ALL according to your locale - but of course that is not really a portable solution. But you might want to check if that does anything for you.
Indeed, they look similar.
I set my LC_ALL=pt_BR.utf8 And the problem persists.