recreate https://github.com/lbryio/lbrycrd/pull/109

restart_crash.py

import subprocess
import json
from bitcoinrpc.authproxy import AuthServiceProxy
import time

# Change this to lbrycrd binary location
LBRYCRD_BIN_LOCATION = 'src/lbrycrdd'
lbrycrd_rpc_user = 'test'
lbrycrd_rpc_pw = 'test'
lbrycrd_rpc_ip = '127.0.0.1'
lbrycrd_rpc_port = '8332'


def run_command(cmd):
    """given shell command, returns communication tuple of stdout and stderr"""
    #p=subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)

    p=subprocess.Popen(cmd, shell=True)
    return p.communicate()

def get_lbrycrd():
    return AuthServiceProxy("http://{}:{}@{}:{}".format(lbrycrd_rpc_user, lbrycrd_rpc_pw,
                                                        lbrycrd_rpc_ip, lbrycrd_rpc_port),timeout=60*20)


# clean up regtest folder
run_command('rm -rf ~/.lbrycrd/regtest')

run_command('{} -regtest -daemon'.format(LBRYCRD_BIN_LOCATION))
lbrycrd = get_lbrycrd()
time.sleep(6)
print("Generating initial blcoks")
out = lbrycrd.generate(300)

claim_txid = lbrycrd.claimname('test','0000',0.1)
print("Claim named:{}".format(claim_txid))

out = lbrycrd.generate(1)
block_hash = out[-1]
print("Generated block hash:{}".format(block_hash))

lbrycrd.stop()
print("Killed lbrycrdd")
time.sleep(6)

run_command('{} -regtest -daemon'.format(LBRYCRD_BIN_LOCATION))
time.sleep(6)
print("Started lbrycrdd again")
lbrycrd = get_lbrycrd()
out = lbrycrd.invalidateblock(block_hash)
print("Invalidating block:{}".format(out))


lbrycrd.generate(1)
print("Generated blocks again")

print("Stopping regtest")
run_command('pkill lbrycrdd')