http://bugs.winehq.org/show_bug.cgi?id=34119
--- Comment #1 from Dan Kegel dank@kegel.com 2013-07-23 14:03:49 CDT --- Without WINEDEBUG=warn+heap, this happened in 2 runs out of 156 (along with a whole bunch of crashes from obvious heap corruption). With WINEDEBUG=warn+heap, this happened in 0 runs out of 144 (along with four crashes in setupapi, possibly also heap corruption).
So this is probably a dup of bug 34120, which may be a dup of bug 26016.