Call pthread_join for each thread created before disposing chan
Call pthread_join for each thread created before disposing chan

tylertreat/chan,1514louluo/chan,tylertreat/chan,tylertreat/chan,1514louluo/chan,tempbottle/chan,tempbottle/chan,1514louluo/chan,grafov/chan,grafov/chan,tempbottle/chan,grafov/chan