#0  PyErr_Occurred () at ../Python/errors.c:77
#1  0x00007f55d7834f55 in pq_execute_command_locked (conn=0x41d97e0, query=0x7f55d7847b60 "ROLLBACK", pgres=0x7fffe7cfec88, error=0x7fffe7cfec80, tstate=0x7fffe7cfec78) at psycopg/pqpath.c:347
#2  0x00007f55d78351ba in pq_abort_locked (conn=0x41d97e0, pgres=<value optimized out>, error=<value optimized out>, tstate=<value optimized out>) at psycopg/pqpath.c:485
#3  0x00007f55d7835255 in pq_abort (conn=0x41d97e0) at psycopg/pqpath.c:515
#4  0x00007f55d78397a5 in psyco_conn_rollback (self=<value optimized out>, args=<value optimized out>) at psycopg/connection_type.c:156
#5  0x00000000004970ef in call_function (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:3997
#6  PyEval_EvalFrameEx (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:2666
#7  0x0000000000496dbf in fast_function (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:4099
#8  call_function (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:4034
#9  PyEval_EvalFrameEx (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:2666
#10 0x0000000000496dbf in fast_function (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:4099
#11 call_function (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:4034
#12 PyEval_EvalFrameEx (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:2666
#13 0x0000000000496dbf in fast_function (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:4099
#14 call_function (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:4034
#15 PyEval_EvalFrameEx (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:2666
#16 0x0000000000496dbf in fast_function (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:4099
#17 call_function (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:4034
#18 PyEval_EvalFrameEx (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:2666
#19 0x0000000000496dbf in fast_function (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:4099
#20 call_function (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:4034
#21 PyEval_EvalFrameEx (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:2666
#22 0x000000000049d325 in PyEval_EvalCodeEx (co=0x209e2b0, globals=<value optimized out>, locals=<value optimized out>, args=<value optimized out>, argcount=<value optimized out>, kws=<value optimized out>, kwcount=0, defs=0x20fd4e8, defcount=1, closure=0x0)
    at ../Python/ceval.c:3253
#23 0x0000000000496a92 in fast_function (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:4109
#24 call_function (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:4034
#25 PyEval_EvalFrameEx (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:2666
#26 0x000000000049d325 in PyEval_EvalCodeEx (co=0x209e830, globals=<value optimized out>, locals=<value optimized out>, args=<value optimized out>, argcount=<value optimized out>, kws=<value optimized out>, kwcount=0, defs=0x0, defcount=0, closure=0x0)
    at ../Python/ceval.c:3253
#27 0x00000000004c46f8 in function_call (func=<value optimized out>, arg=
    (<Session(autocommit=False, autoflush=True, transaction=<SessionTransaction(_new=<WeakKeyDictionary(_remove=<function at remote 0x4009cf8>, data={}) at remote 0x3ffb4d0>, _prepared=False, _active=True, _deleted=<WeakKeyDictionary(_remove=<function at remote 0x4009d70>, data={}) at remote 0x3ffbfc8>, nested=False, _parent=None, session=<...>, _connections={<Connection(engine=<Engine(engine=<...>, dialect=<PGDialect_psycopg2(use_native_unicode=True, _ischema=None, encoding='utf-8', isolation_level=None, _type_memos=<WeakKeyDictionary(_remove=<function at remote 0x4009e60>, data={<weakref at remote 0x400e578>: {1043: None, 25: None, 19: None, 'impl': <NullType at remote 0x4026750>}}) at remote 0x3ffbd88>, default_schema_name=u'public', _description_decoder=<function at remote 0x4009a28>, _encoder=<built-in function utf_8_encode>, positional=False, psycopg2_version=(2, 4, 2), dbapi=<module at remote 0x1a72910>, paramstyle='pyformat', convert_unicode=False, label_length=None, supports_native_enum=True, server_vers...(truncated), kw=<value optimized out>)
    at ../Objects/funcobject.c:526
#28 0x000000000045d864 in PyObject_Call (func=<function at remote 0x2102aa0>, arg=<value optimized out>, kw=<value optimized out>) at ../Objects/abstract.c:2529
#29 0x0000000000498461 in ext_do_call (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:4326
#30 PyEval_EvalFrameEx (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:2705
#31 0x000000000049d885 in PyEval_EvalCodeEx (co=0x210e030, globals=<value optimized out>, locals=<value optimized out>, args=<value optimized out>, argcount=<value optimized out>, kws=<value optimized out>, kwcount=0, defs=0x0, defcount=0, closure=
    (<cell at remote 0x210a910>,)) at ../Python/ceval.c:3253
#32 0x0000000000496a92 in fast_function (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:4109
#33 call_function (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:4034
#34 PyEval_EvalFrameEx (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:2666
#35 0x000000000049d885 in PyEval_EvalCodeEx (co=0x3877430, globals=<value optimized out>, locals=<value optimized out>, args=<value optimized out>, argcount=<value optimized out>, kws=<value optimized out>, kwcount=0, defs=0x0, defcount=0, closure=
    (<cell at remote 0x3e6afd8>,)) at ../Python/ceval.c:3253
#36 0x0000000000496a92 in fast_function (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:4109
#37 call_function (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:4034
#38 PyEval_EvalFrameEx (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:2666
#39 0x000000000049d885 in PyEval_EvalCodeEx (co=0x38774b0, globals=<value optimized out>, locals=<value optimized out>, args=<value optimized out>, argcount=<value optimized out>, kws=<value optimized out>, kwcount=1, defs=0x3cdf268, defcount=1, closure=0x0)
    at ../Python/ceval.c:3253
#40 0x0000000000496a92 in fast_function (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:4109
#41 call_function (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:4034
#42 PyEval_EvalFrameEx (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:2666
#43 0x0000000000496dbf in fast_function (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:4099
#44 call_function (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:4034
#45 PyEval_EvalFrameEx (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:2666
#46 0x000000000049d325 in PyEval_EvalCodeEx (co=0x7f55d9b0a7b0, globals=<value optimized out>, locals=<value optimized out>, args=<value optimized out>, argcount=<value optimized out>, kws=<value optimized out>, kwcount=0, defs=0x0, defcount=0, closure=0x0)
    at ../Python/ceval.c:3253
#47 0x00000000004ecb02 in PyEval_EvalCode (co=<value optimized out>, globals=<value optimized out>, locals=<value optimized out>) at ../Python/ceval.c:667