rm sync while playing testcase

import gobject
import gst

gobject.threads_init()

for i in range(10000):
    pipe = gst.parse_launch("filesrc location=foo.wav ! filesink location=bar.wav")
    bus = pipe.get_bus()
    bus.set_sync_handler(lambda *x: gst.BUS_PASS)
    pipe.set_state(gst.STATE_PLAYING)
    bus.set_sync_handler(None)
    pipe.set_state(gst.STATE_NULL)