http://bugs.winehq.org/show_bug.cgi?id=18374
--- Comment #5 from Jeff Zaroyko jeffz@jeffz.name 2009-05-06 23:08:42 ---
From the summary:
E: memblock.c: Assertion 'b' failed at pulsecore/memblock.c:438, function
pa_memblock_acquire(). Aborting.
then check the second attachment you posted, thread 45 shows a stacktrace from inside pulseaudio code calling abort() which causes the current process to terminate abnormally, hence the crash you experience.