create_coinbase() was being called with the wrong arguments
bip65-cltv.py is based on the earlier BIP66 soft-fork RPC test implemented by Pieter Wuille's 819bcf9b99 bip65-cltv-p2p.py is based on the earlier BIP66 P2P test by Suhas Daftuar's d76412b068
819bcf9b99
d76412b068