This code causes a segfault:

import time
from PySide.QtCore import QTime, QRunnable, QThreadPool

class Task(QRunnable):
   def run(self):
       t = QTime()
       t.start()
       time.sleep(2) # Sleep 2 seconds
       print 'Slow thread has wasted', t.elapsed(), 'ms'

if __name__ == '__main__':
   while True:
       task = Task()
       QThreadPool.globalInstance().start(task)
       time.sleep(1) # Sleep 1 second