Update _via_by_context earlier; fixes:
Traceback (most recent call last):
File "/Users/dmw/src/mitogen/mitogen/service.py", line 519, in _on_service_call
return invoker.invoke(method_name, kwargs, msg)
File "/Users/dmw/src/mitogen/mitogen/service.py", line 253, in invoke
response = self._invoke(method_name, kwargs, msg)
File "/Users/dmw/src/mitogen/mitogen/service.py", line 239, in _invoke
ret = method(**kwargs)
File "/Users/dmw/src/mitogen/ansible_mitogen/services.py", line 454, in get
reraise(*result)
File "/Users/dmw/src/mitogen/ansible_mitogen/services.py", line 412, in _wait_or_start
response = self._connect(key, spec, via=via)
File "/Users/dmw/src/mitogen/ansible_mitogen/services.py", line 363, in _connect
self._update_lru(context, spec, via)
File "/Users/dmw/src/mitogen/ansible_mitogen/services.py", line 266, in _update_lru
self._update_lru_unlocked(new_context, spec, via)
File "/Users/dmw/src/mitogen/ansible_mitogen/services.py", line 253, in _update_lru_unlocked
if self._refs_by_context[context] == 0:
KeyError: Context(1008, u'ssh.localhost.sudo.mitogen__user3')
Now poller is start enough to know a start_receive() during an iteration
does not cause events yielded by that iteration to associate with the
wrong descriptor.
These changes are tangentially related to the associated ticket, but
event versioning is still the underlying issue.