Suicides to non-existant address create a contract in the state.

[davidjaenson]

Description

A suicide with an argument to a non-existant address creates a new account at that address in the state. This seems like unintended behaviour according to our model.

Steps to reproduce

1. Start qtumd in regtest mode: ./qtumd -regtest
2. Mine some blocks: ./qtum-cli -regtest generate 20
3. Create a new contract that suicides and refunds the contract's balance to the address at 0xe0e on calling the fallback function, store the contract's address for later use CONTRACT=$(./qtum-cli -regtest createcontract "60606040523415600b57fe5b5b603d8060196000396000f30060606040525b600f5b610e0eff5b565b0000a165627a7a723058209e90cd77b49430d225c3ebd97a7eabf1282254a9d0260e71448f338a40207fa10029" | python3 -c "import json; import sys; print(json.loads(sys.stdin.read())['address'])")
4. Mine this tx: ./qtum-cli -regtest generate 1
5. Send a tx that calls the fallback function: ./qtum-cli -regtest sendtocontract $CONTRACT "00"
6. Mine this tx: ./qtum-cli -regtest generate 1
7. List the contracts that currently exists: ./qtum-cli -regtest listcontracts

Expected results:

1. No contracts should exists.

Actual results:

1. A contract exists

Suicide contract:

pragma solidity ^0.4.11;

contract Test {
    function () payable {
        suicide(0xe0e);
    }
}