#!/usr/bin/env python

import sys
import time
from PySide2 import QtCore

wait = QtCore.QWaitCondition()
mutex = QtCore.QMutex()


class Producer(QtCore.QThread):
    def run(self):
        time.sleep(2)


if __name__ == "__main__":
    app = QtCore.QCoreApplication(sys.argv)
    producer = Producer()
    producer.start()
    print("About to call Qthread.wait()")
    producer.wait() # crashes
    print("Qthread finished")