def test_reducer_override_no_reference_cycle(ray_start_shared_local_modes):
# bpo-39492: reducer_override used to induce a spurious reference cycle
# inside the Pickler object, that could prevent all serialized objects
# from being garbage-collected without explicity invoking gc.collect.
# test a dynamic function
def f():
return 4669201609102990671853203821578
wr = weakref.ref(f)
bio = io.BytesIO()
from ray.cloudpickle import CloudPickler, loads, dumps
p = CloudPickler(bio, protocol=5)
p.dump(f)
new_f = loads(bio.getvalue())
assert new_f() == 4669201609102990671853203821578
del p
del f
assert wr() is None
# test a dynamic class
class ShortlivedObject:
def __del__(self):
print("Went out of scope!")
obj = ShortlivedObject()
new_obj = weakref.ref(obj)
dumps(obj)
del obj
assert new_obj() is None
def test_reducer_override_no_reference_cycle(ray_start_regular):
# bpo-39492: reducer_override used to induce a spurious reference cycle
# inside the Pickler object, that could prevent all serialized objects
# from being garbage-collected without explicity invoking gc.collect.
def f():
return 4669201609102990671853203821578
wr = weakref.ref(f)
bio = io.BytesIO()
from ray.cloudpickle import CloudPickler, loads
p = CloudPickler(bio, protocol=5)
p.dump(f)
new_f = loads(bio.getvalue())
assert new_f() == 4669201609102990671853203821578
del p
del f
assert wr() is None
