TypeError when reaching RateLimit

[Green222]

When reaching RateLimit, a TypeError was triggered.
It seems RiotWatcher is trying to compute the time needed to wait, but is missing one of the value to do so (maybe a value in Riot Headers not found?).
In any case, this should be handled as we are not supposed to catch a TypeError above.
Here is the traceback:

File "/usr/local/lib/python3.6/dist-packages/riotwatcher/_apis/league_of_legends/SummonerApiV4.py", line 49, in by_name
    summoner_name=summoner_name,
  File "/usr/local/lib/python3.6/dist-packages/riotwatcher/_apis/NamedEndpoint.py", line 36, in _request_endpoint
    self._endpoint_name, method_name, region, url, query
  File "/usr/local/lib/python3.6/dist-packages/riotwatcher/_apis/BaseApi.py", line 30, in raw_request
    region, endpoint_name, method_name, url, query_params
  File "/usr/local/lib/python3.6/dist-packages/riotwatcher/Handlers/RateLimiterAdapter.py", line 35, in preview_request
    wait_until = self._limiter.wait_until(region, endpoint_name, method_name)
  File "/usr/local/lib/python3.6/dist-packages/riotwatcher/Handlers/RateLimit/BasicRateLimiter.py", line 34, in wait_until
    for limiter in self._limiters
  File "/usr/local/lib/python3.6/dist-packages/riotwatcher/Handlers/RateLimit/BasicRateLimiter.py", line 34, in <listcomp>
    for limiter in self._limiters
  File "/usr/local/lib/python3.6/dist-packages/riotwatcher/Handlers/RateLimit/HeaderBasedLimiter.py", line 49, in wait_until
    return scoped_limit.wait_until()
  File "/usr/local/lib/python3.6/dist-packages/riotwatcher/Handlers/RateLimit/Limits.py", line 23, in wait_until
    limits_waits = [limit.wait_until() for key, limit in self._limits.items()]
  File "/usr/local/lib/python3.6/dist-packages/riotwatcher/Handlers/RateLimit/Limits.py", line 23, in <listcomp>
    limits_waits = [limit.wait_until() for key, limit in self._limits.items()]
  File "/usr/local/lib/python3.6/dist-packages/riotwatcher/Handlers/RateLimit/Limits.py", line 110, in wait_until
    return self._start_time + datetime.timedelta(seconds=self.duration)
TypeError: unsupported operand type(s) for +: 'NoneType' and 'datetime.timedelta'

[pseudonym117]

Yeah thats definitely a bug... did this happen on the very first request made to the summoner api?

[Green222]

That happened when I reached rate limit on the summoner api, but not on the very first request.
I can also reproduce that issue most of the times by triggering the rate limit error multiple times, if that can help.
I am currently using a product key and not a dev key (not sure if that can make any difference) :)