http://bugs.winehq.org/show_bug.cgi?id=34700
--- Comment #4 from Bruno Jesus 00cpxxx@gmail.com 2013-10-11 10:54:26 CDT --- It's very similar to the problem in https://forum.winehq.org/viewtopic.php?t=17689&p=81848
The assert is triggered inside nouveau_dri.so according to backtrace lines 5 to 0.