Segmentation fault in certain cases when using ray with rllab.

[robertnishihara]

The following code segfaults (you have to install rllab first).

import ray
import rllab.misc.ext

ray.init()

@ray.actor
class Foo(object):
    def __init__(self):
        super().__init__()

Foo()

[robertnishihara]

The problem is with the line

sys.setrecursionlimit(50000)

in rllab/rllab/misc/ext.py (see https://github.com/openai/rllab/blob/master/rllab/misc/ext.py).

If you comment out the line import rllab.misc.ext in the example, the example doesn't segfault and instead raises an exception

PicklingError: Could not pickle object as excessively deep recursion required.

The exception is raised for reasons discussed in #449. However, since rllab raises the recursion limit, something presumably overflows.

[robertnishihara]

Closing because this is not really a problem with Ray.