#! python
# -*- coding: utf-8 -*-

# When run under Windows python 3.4.3 this program will crash after some time

import time
import random

buf1 = bytearray()
buf2 = bytearray()

while True:
    data = b"1234567890123"
    buf1 += data
    buf2 += data

    l = len(buf2)
    n = random.randrange(1, l-1)
    print("buf2: {0} {1} {2}".format(l,n,buf2))
    del buf2[:n]

    l = len(buf1)
    n = random.randrange(1, l-1)
    print("buf1: {0} {1} {2}".format(l,n,buf1))
    del buf1[:n]