http://bugs.winehq.org/show_bug.cgi?id=33481
--- Comment #3 from Ken Thomases ken@codeweavers.com --- (In reply to denis bonnenfant from comment #0)
... the application is generating its own coredump, but I don't know how to analyse it.
If it's a .dmp or .mdmp file, you can pass its path to winedbg and it may produce a backtrace.