Tradfri groups iteration TypeError with async

[infernix]

Home Assistant release (hass --version):

0.55.0

Python release (python3 --version):

3.5.3

Component/platform:

Tradfri

Description of problem:

Upgrading to 0.55 with new async code results in TypeError on tradfri light init:

Oct 09 13:21:18 spirit hass[8169]: Traceback (most recent call last):
Oct 09 13:21:18 spirit hass[8169]:   File "/usr/local/lib/python3.5/dist-packages/homeassistant/helpers/entity_component.py", line 164, in _async_setup_platform
Oct 09 13:21:18 spirit hass[8169]:     SLOW_SETUP_MAX_WAIT, loop=self.hass.loop)
Oct 09 13:21:18 spirit hass[8169]:   File "/usr/lib/python3.5/asyncio/tasks.py", line 400, in wait_for
Oct 09 13:21:18 spirit hass[8169]:     return fut.result()
Oct 09 13:21:18 spirit hass[8169]:   File "/usr/lib/python3.5/asyncio/futures.py", line 293, in result
Oct 09 13:21:18 spirit hass[8169]:     raise self._exception
Oct 09 13:21:18 spirit hass[8169]:   File "/usr/lib/python3.5/asyncio/tasks.py", line 239, in _step
Oct 09 13:21:18 spirit hass[8169]:     result = coro.send(None)
Oct 09 13:21:18 spirit hass[8169]:   File "/usr/local/lib/python3.5/dist-packages/homeassistant/components/light/tradfri.py", line 54, in async_setup_platform
Oct 09 13:21:18 spirit hass[8169]:     async_add_devices(TradfriGroup(group, api) for group in groups)
Oct 09 13:21:18 spirit hass[8169]: TypeError: 'Group' object is not iterable

Expected:

Group iteration should not result in a TypeError with the new async code introduced in 8db4641#diff-459bd622c1c30fd9674062a6d7b78a99

Theoretical workaround is to set allow_tradfri_groups: False, but cannot test due to new error:

Oct 09 13:34:36 spirit hass[8169]: 2017-10-09 13:34:36 ERROR (Dummy-46) [coap] Exception RuntimeError('Event loop is closed',) can not be represented as errno, setting -1.
Oct 09 13:34:36 spirit hass[8169]: 2017-10-09 13:34:36 WARNING (Dummy-46) [coap] Error received in UDP connection under DTLS: [Errno 9] Bad file descriptor

Problem-relevant configuration.yaml entries and steps to reproduce:

tradfri:
        host: 192.168.0.18
        api_key: !secret tradfri_api_key

1. Install new aiocoap libs
2. (Re)start HASS
3. See error in log

Traceback (if applicable):
See above

Additional info:

[balloob]

CC @lwis

[lwis]

I think this will be solved by home-assistant-libs/pytradfri#61, once I find some time to polish it off.

I'm not sure what's causing your Bad file descriptor error.

[infernix]

I spent a bit of time testing aiocoap standalone and reproduced the file descriptor error; link to aiocoap issue report above.

[lwis]

Can you try to test against https://pypi.python.org/pypi/DTLSSocket/0.1.3 instead?

[infernix]

@lwis runtime error still persists on 0.1.3, e.g.

./aiocoap-client -v coaps://192.168.0.18:5684/.well-known/core
decrypt_verify(): found 24 bytes cleartext
decrypt_verify(): found 770 bytes cleartext
<//15001/65536>;ct=0;obs,<//15001/65540>;ct=0;obs,<//15001/65538>;ct=0;obs,<//15001/65537>;ct=0;obs,<//15001/65541>;ct=0;obs,<//15001/65539>;ct=0;obs,<//15001/65542>;ct=0;obs,<//15004/138319>;ct=0;obs,<//15005/138319>;ct=0;obs,<//15005/138319/200548>;ct=0;obs,<//15005/138319/201928>;ct=0;obs,<//15005/138319/210846>;ct=0;obs,<//15005/138319/196836>;ct=0;obs,<//15005/138319/228499>;ct=0;obs,<//15005/138319/207315>;ct=0;obs,<//15005/138319/228341>;ct=0;obs,<//15001>;ct=0;obs,<//15001/reset>;ct=0,<//status>;ct=0;obs,<//15005>;ct=0;obs,<//15004>;ct=0;obs,<//15004/add>;ct=0,<//15004/remove>;ct=0,<//15006>;ct=0;obs,<//15011/15012>;ct=0;obs,<//15011/9034>;ct=0,<//15011/9030>;ct=0,<//15011/9031>;ct=0,<//15011/9063>;ct=0,<//15011/9033>;ct=0,<//15010>;ct=0;obs
(No newline at end of message)
ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending coro=<DTLSClientConnection._run() running at /usr/src/aiocoap/aiocoap/transports/tinydtls.py:160> wait_for=<Future pending cb=[Task._wakeup()]>>
ERROR:coap:Exception RuntimeError('Event loop is closed',) can not be represented as errno, setting -1.
WARNING:coap:Error received in UDP connection under DTLS: [Errno 9] Bad file descriptor
Exception ignored in: <generator object DTLSClientConnection._run at 0x7f54889d1200>
Traceback (most recent call last):
  File "/usr/src/aiocoap/aiocoap/transports/tinydtls.py", line 180, in _run
  File "/usr/lib/python3.5/asyncio/selector_events.py", line 622, in close
  File "/usr/lib/python3.5/asyncio/base_events.py", line 572, in call_soon
  File "/usr/lib/python3.5/asyncio/base_events.py", line 357, in _check_closed
RuntimeError: Event loop is closed

and that seems to be the same error HASS is throwing