Update -- After more testing it turns out that the crash I'm noticing can happen using latest git with no code alterations. I've wrote it up in this bug: http://bugs.winehq.org/show_bug.cgi?id=22301 I see this crash in every version of wine back to 1.1.36, version older than that throw a thread deadlock exception instead of a page fault exception under the same conditions. I tested all the way back to 1.1.25 and then stopped testing older builds to focus on the newer builds again.