tuple out of range

[yaroslavvb]

This line causes tuple out of range

ray/python/ray/services.py

Line 353 in 0ae660c

" Pyarrow: " + str(true_version_info[4]) + "\n"

It tries to get true_version_info[4]

true_version_info:
('0.3.0', '/home/ubuntu/anaconda3/lib/python3.6/site-packages/ray/init.py', '3.6.3', '0.5.2')
version_info: ('0.3.0', '/home/ubuntu/anaconda3/lib/python3.6/site-packages/ray/init.py', '3.6.3', '0.5.2', None)

Ray version:
pip install https://s3-us-west-2.amazonaws.com/ray-wheels/20d6b74aa6c034fdf35422e6805e2283c672e03f/ray-0.3.0-cp36-cp36m-manylinux1_x86_64.whl

[robertnishihara]

Extremely weird. Related to #1360, but somehow it looks like we have a tuple which contains a None value, then we serialize it with json.dumps, stick it in Redis, retrieve it from Redis, and deserialize with json.loads, and the None value disappears or something like that.

[robertnishihara]

I think this issue wasn't reproducible. Please reopen if that's not the case.