Segmentation Fault - Using durability with python3 SDK alpha3

from couchbase.cluster import Cluster

from couchbase_core.cluster import PasswordAuthenticator

from couchbase.durability import Durability

try:

    cluster = Cluster('couchbase://10.112.190.101?enable_tracing=off')

    authenticator = PasswordAuthenticator('Administrator', 'password')

    cluster.authenticate(authenticator)

    cb = cluster.bucket('default')

    cb_coll=cb.default_collection()

    cb_coll.upsert('king_arthur', {'name': 'Arthur', 'email': 'kingarthur@couchbase.com', 'interests': ['Holy Grail', 'African Swallows']},durability_level=Durability.MAJORITY)

except Exception as e:

    print (e)

Starting program: /root/pythonsdk/bin/python temp.py

[Thread debugging using libthread_db enabled]

Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.

0x00000000005c20aa in PyObject_Call ()

(gdb) bt

#0  0x00000000005c20aa in PyObject_Call ()

#1  0x0000000000534870 in PyEval_CallObjectWithKeywords ()

#2  0x00007ffff3b897f8 in encode_common (src=src@entry=0x7ffff7e401c8, dst=dst@entry=0x7fffffffcf40, flags=<optimized out>) at src/convert.c:141

#3  0x00007ffff3b8a715 in pycbc_tc_encode_value (conn=conn@entry=0x7ffff24ea748, srcbuf=0x7ffff7e401c8, srcflags=0x7ffff1e95870, dstbuf=dstbuf@entry=0x7fffffffcf40, dstflags=dstflags@entry=0x7fffffffcf04) at src/convert.c:479

#4  0x00007ffff3b9cb01 in handle_single_kv (handler=handler@entry=0x0, collection=collection@entry=0x7fffffffd130, cv=cv@entry=0x7fffffffd0f0, optype=optype@entry=0, curkey=0x7ffff7e402f0, curvalue=0x7ffff7e401c8, options=0x0, 

    itm=0x0, arg=0x7fffffffd0c0, context=0xeb2920) at src/store.c:212

#5  0x00007ffff3b9d656 in set_common (self=self@entry=0x7ffff24ea748, args=args@entry=0x7ffff0ee3a88, kwargs=kwargs@entry=0x7ffff09742c8, operation=operation@entry=3, argopts=argopts@entry=1, context=0xeb2920, 

    context@entry=0xeb1bd0) at src/store.c:416

#6  0x00007ffff3b9db5f in pycbc_Bucket_upsert (self=0x7ffff24ea748, args=0x7ffff0ee3a88, kwargs=0x7ffff09742c8) at src/store.c:477

#7  0x00000000004ea137 in PyCFunction_Call ()

#8  0x00000000005c20e7 in PyObject_Call ()

#9  0x00000000005348bd in PyEval_CallObjectWithKeywords ()

#10 0x00000000004eeefc in ?? ()

#11 0x00000000005c20e7 in PyObject_Call ()

#12 0x0000000000538cab in PyEval_EvalFrameEx ()

#13 0x0000000000540b0b in PyEval_EvalCodeEx ()

#14 0x00000000004ec3f7 in ?? ()

#15 0x00000000005c20e7 in PyObject_Call ()

#16 0x0000000000538cab in PyEval_EvalFrameEx ()

#17 0x000000000054124a in PyEval_EvalCodeEx ()

#18 0x00000000004ec3f7 in ?? ()

#19 0x00000000005c20e7 in PyObject_Call ()

#20 0x0000000000538cab in PyEval_EvalFrameEx ()

#21 0x0000000000540b0b in PyEval_EvalCodeEx ()

#22 0x00000000004ec3f7 in ?? ()

#23 0x00000000005c20e7 in PyObject_Call ()

#24 0x0000000000538cab in PyEval_EvalFrameEx ()

#25 0x000000000054124a in PyEval_EvalCodeEx ()

#26 0x00000000004ec3f7 in ?? ()

#27 0x00000000005c20e7 in PyObject_Call ()

#28 0x0000000000538cab in PyEval_EvalFrameEx ()

#29 0x000000000053fc97 in ?? ()

#30 0x000000000053bc93 in PyEval_EvalFrameEx ()

#31 0x000000000053fc97 in ?? ()

#32 0x00000000005409bf in PyEval_EvalCode ()

#33 0x000000000060cb42 in ?? ()

#34 0x000000000060efea in PyRun_FileExFlags ()

#35 0x000000000060f7dc in PyRun_SimpleFileExFlags ()

#36 0x0000000000640256 in Py_Main ()

#37 0x00000000004d0001 in main ()