test_contracts.py TypeError

[Daltan]

platform linux -- Python 3.6.4, pytest-3.3.2, py-1.5.2, pluggy-0.6.0

python3.6 -m pytest test_contracts.py

54 passed 1 failed

test_contracts.py:364:

---

self = <ethereum.tools.tester.Chain object at 0x7f7e0f7dc1d0>
number_of_blocks = 100
timestamp = b'Y\x84C\xf1\x88\x0e\xf5\x85\xb2\x1f\x1du\x85\xbd\x05w@(a\xe5'
coinbase = b'\x82\xa9x\xb3\xf5\x96*[\tW\xd9\xee\x9e\xefG.\xe5[B\xf1'

    def mine(self, number_of_blocks=1, timestamp=14, coinbase=a0):
        self.cs.finalize(self.head_state, self.block)
        set_execution_results(self.head_state, self.block)
        self.block = Miner(self.block).mine(rounds=100, start_nonce=0)
        assert self.chain.add_block(self.block)
        b = self.block
        for i in range(1, number_of_blocks):
            b, _ = make_head_candidate(
>               self.chain, parent=b, timestamp=self.chain.state.timestamp + timestamp, coinbase=coinbase)

E TypeError: unsupported operand type(s) for +: 'int' and 'bytes'