http://bugs.winehq.org/show_bug.cgi?id=27823
--- Comment #5 from Henri Verbeet hverbeet@gmail.com 2011-07-17 16:23:08 CDT --- (In reply to comment #4)
with that flag I get
util/u_upload_mgr.c:175:u_upload_alloc: Assertion `offset < upload->buffer->width0' failed.
What version of Mesa is that? I think this was already fixed. Regardless, using MESA_EXTENSION_OVERRIDE="-GL_ARB_map_buffer_range,-GL_ARB_draw_elements_base_vertex" instead will probably avoid that one.