Suspected infinite recursion in jacobian

[mderka]

(Submitting as instructed on Gitter by @carver .)

• Version: eth-keys==0.2.0b3, eth-tester[py-evm]==0.1.0b33, py-evm=0.2.0a33
• Python: 3.6.6
• OS: linux (inside docker on osx)

What was wrong?

When running a transaction in our test suited, the following error showed up. The error appears like an infinite loop/recursion. It appears intermittently and I do not have solid way of reproducing it.

Please include any of the following that are applicable:

• The code which produced the error
• The full output of the error

  
  tests/audit/test_audit.py:1255: in __send_done_message
  {"from": self.__config.account}
  tests/audit/test_audit.py:115: in __safe_transact
  raise e
  tests/audit/test_audit.py:111: in __safe_transact
  return contract_entity.transact(tx_args)
  /usr/lib/python3.6/site-packages/web3/contract.py:1034: in transact
  **self.kwargs)
  /usr/lib/python3.6/site-packages/web3/contract.py:1311: in transact_with_contract_function
  txn_hash = web3.eth.sendTransaction(transact_transaction)
  /usr/lib/python3.6/site-packages/web3/eth.py:244: in sendTransaction
  [transaction],
  /usr/lib/python3.6/site-packages/web3/manager.py:103: in request_blocking
  response = self._make_request(method, params)
  /usr/lib/python3.6/site-packages/web3/manager.py:86: in _make_request
  return request_func(method, params)
  /usr/lib/python3.6/site-packages/web3/middleware/gas_price_strategy.py:18: in middleware
  return make_request(method, params)
  /usr/lib/python3.6/site-packages/web3/middleware/formatting.py:21: in middleware
  response = make_request(method, formatted_params)
  /usr/lib/python3.6/site-packages/web3/middleware/attrdict.py:18: in middleware
  response = make_request(method, params)
  /usr/lib/python3.6/site-packages/web3/middleware/formatting.py:21: in middleware
  response = make_request(method, formatted_params)
  /usr/lib/python3.6/site-packages/web3/middleware/normalize_errors.py:9: in middleware
  result = make_request(method, params)
  /usr/lib/python3.6/site-packages/web3/middleware/validation.py:43: in middleware
  return make_request(method, post_validated_params)
  /usr/lib/python3.6/site-packages/web3/middleware/formatting.py:21: in middleware
  response = make_request(method, formatted_params)
  /usr/lib/python3.6/site-packages/web3/providers/eth_tester/middleware.py:320: in middleware
  return make_request(method, [filled_transaction] + params[1:])
  /usr/lib/python3.6/site-packages/web3/middleware/fixture.py:12: in middleware
  return make_request(method, params)
  /usr/lib/python3.6/site-packages/web3/middleware/formatting.py:21: in middleware
  response = make_request(method, formatted_params)
  /usr/lib/python3.6/site-packages/web3/providers/eth_tester/main.py:46: in make_request
  response = delegator(self.ethereum_tester, params)
  cytoolz/functoolz.pyx:232: in cytoolz.functoolz.curry.__call__
  ???
  /usr/lib/python3.6/site-packages/web3/providers/eth_tester/defaults.py:36: in call_eth_tester
  return getattr(eth_tester, fn_name)(*fn_args, **fn_kwargs)
  /usr/lib/python3.6/site-packages/eth_tester/main.py:78: in func_wrapper
  transaction_hash = func(self, *args, **kwargs)
  /usr/lib/python3.6/site-packages/eth_tester/main.py:430: in send_transaction
  return self._add_transaction_to_pending_block(transaction)
  /usr/lib/python3.6/site-packages/eth_tester/main.py:473: in _add_transaction_to_pending_block
  raw_transaction_hash = self.backend.send_transaction(raw_transaction)
  /usr/lib/python3.6/site-packages/eth_tester/backends/pyevm/main.py:496: in send_transaction
  self.chain.apply_transaction(signed_evm_transaction)
  /usr/lib/python3.6/site-packages/eth/chains/base.py:841: in apply_transaction
  new_header, receipt, computation = vm.apply_transaction(base_block.header, transaction)
  /usr/lib/python3.6/site-packages/eth/vm/base.py:356: in apply_transaction
  state_root, computation = self.state.apply_transaction(transaction)
  /usr/lib/python3.6/site-packages/eth/vm/state.py:220: in apply_transaction
  computation = self.execute_transaction(transaction)
  /usr/lib/python3.6/site-packages/eth/vm/forks/frontier/state.py:189: in execute_transaction
  return executor(transaction)
  /usr/lib/python3.6/site-packages/eth/vm/state.py:268: in __call__
  message = self.build_evm_message(valid_transaction)
  /usr/lib/python3.6/site-packages/eth/vm/forks/frontier/state.py:52: in build_evm_message
  self.vm_state.account_db.delta_balance(transaction.sender, -1 * gas_fee)
  /usr/lib/python3.6/site-packages/eth/rlp/transactions.py:97: in sender
  return self.get_sender()
  /usr/lib/python3.6/site-packages/eth/vm/forks/frontier/transactions.py:63: in get_sender
  return extract_transaction_sender(self)
  /usr/lib/python3.6/site-packages/eth/utils/transactions.py:103: in extract_transaction_sender
  public_key = signature.recover_public_key_from_msg(message)
  /usr/lib/python3.6/site-packages/eth_keys/datatypes.py:376: in recover_public_key_from_msg
  return self.recover_public_key_from_msg_hash(message_hash)
  /usr/lib/python3.6/site-packages/eth_keys/datatypes.py:379: in recover_public_key_from_msg_hash
  return self.backend.ecdsa_recover(message_hash, self)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/main.py:30: in ecdsa_recover
  public_key_bytes = ecdsa_raw_recover(msg_hash, signature.vrs)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/ecdsa.py:135: in ecdsa_raw_recover
  Q = jacobian_multiply(Qr, inv(r, N))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:78: in jacobian_multiply
  return jacobian_double(jacobian_multiply(a, n // 2))
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:80: in jacobian_multiply
  return jacobian_add(jacobian_double(jacobian_multiply(a, n // 2)), a)
  /usr/lib/python3.6/site-packages/eth_keys/backends/native/jacobian.py:59: in jacobian_add
  ny = (R * (U1H2 - nx) - S1 * H3) % P
  /usr/lib/python3.6/site-packages/timeout_decorator/timeout_decorator.py:72: in handler
  _raise_exception(timeout_exception, exception_message)
  _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

exception = <class 'StopIteration'>, exception_message = None

def _raise_exception(exception, exception_message):
    """ This function checks if a exception message is given.

    If there is no exception message, the default behaviour is maintained.
    If there is an exception message, the message is passed to the exception with the 'value' keyword.
    """
    if exception_message is None:

      raise exception()

E StopIteration

/usr/lib/python3.6/site-packages/timeout_decorator/timeout_decorator.py:45: StopIteration

### How can it be fixed?

I do not have an insight.

[pipermerriam]

It would be really helpful if we could get the values from this section.

/usr/lib/python3.6/site-packages/eth_keys/backends/native/main.py:30: in ecdsa_recover
    public_key_bytes = ecdsa_raw_recover(msg_hash, signature.vrs)

Specifically the msg_hash and signature.vrs values. This will let us confirm this bug in isolation.

[mderka]

Those values will likely not be available. They are dynamic and I cannot consistently reproduce the issue, so they are hard to get. I will try to run the tests whenever possible and report if I manage to retrieve them.

[carver]

Recovering a signature is a feature that we already test on lots of random inputs, even on invalid signatures. See https://github.com/ethereum/eth-keys/blob/ce2aade354c77531babaa16669529082a7835f39/tests/backends/test_native_backend_against_coincurve.py

So it's going to be tricky for us to figure out this bug without the specific inputs. One thing we could do in the meantime is catch that StopIteration in eth-keys main and re-raise the exception with the message & signature. (also, should StopIteration be a timeout exception instead?)