Remote function ray.dataframe.utils._deploy_func failed with:

Traceback (most recent call last):
  File "/home/peter/workspace/ray/python/ray/dataframe/utils.py", line 132, in _deploy_func
    return func(dataframe, *args)
  File "/home/peter/workspace/ray/python/ray/dataframe/dataframe.py", line 4728, in del_helper
    cols = df.columns[to_delete]  # either int or an array of ints
  File "/home/peter/workspace/ray_env/lib/python3.6/site-packages/pandas/core/indexes/range.py", line 544, in __getitem__
    return super_getitem(key)
  File "/home/peter/workspace/ray_env/lib/python3.6/site-packages/pandas/core/indexes/base.py", line 1754, in __getitem__
    result = getitem(key)
IndexError: index 0 is out of bounds for axis 1 with size 0


  You can inspect errors by running

      ray.error_info()

  If this driver is hanging, start a new one with

      ray.init(redis_address="192.168.0.114:49682")