http://bugs.winehq.org/show_bug.cgi?id=33307
--- Comment #19 from Dan Kegel dank@kegel.com 2013-04-18 20:43:41 CDT --- next step may be to bisect the wine sources (not in time, but in space) by compiling half of them with the good compiler, and half of them with the bad compiler, and narrowing down the file that triggers the problem that way.