http://bugs.winehq.org/show_bug.cgi?id=9612
--- Comment #11 from knan-wine@anduin.net 2007-09-21 12:31:09 --- Last line is:
fixme:dsound:IDirectSoundBufferImpl_Duplicate Before RecalcFormat #2
... so the dsb->tmp_buffer = NULL; assignment goes fine, then it continues and crashes in RecalcFormat.