sym_struct has no c_cls attribute about hase HOT 2 CLOSED

ERROR   | 2018-11-28 15:58:29,000 | root | Error while finding successor for recordings/file-3-4a51454.tar.gz
Traceback (most recent call last):
  File "/local/incoop/hase/hase/symbex/tracer.py", line 378, in execute
    state, num_inst=1  # , force_addr=addr
  File "/local/incoop/hase/.direnv/python-3.6.6/lib/python3.6/site-packages/angr/factory.py", line 49, in successors
    return self.project.engines.successors(*args, **kwargs)
  File "/local/incoop/hase/.direnv/python-3.6.6/lib/python3.6/site-packages/angr/engines/hub.py", line 128, in successors
    r = engine.process(state, **kwargs)
  File "/local/incoop/hase/.direnv/python-3.6.6/lib/python3.6/site-packages/angr/engines/hook.py", line 51, in process
    return self.project.factory.procedure_engine.process(state, procedure, force_addr=force_addr, **kwargs)
  File "/local/incoop/hase/.direnv/python-3.6.6/lib/python3.6/site-packages/angr/engines/procedure.py", line 31, in process
    force_addr=force_addr)
  File "/local/incoop/hase/.direnv/python-3.6.6/lib/python3.6/site-packages/angr/engines/engine.py", line 55, in process
    self._process(new_state, successors, *args, **kwargs)
  File "/local/incoop/hase/.direnv/python-3.6.6/lib/python3.6/site-packages/angr/engines/procedure.py", line 65, in _process
    inst = procedure.execute(state, successors, ret_to=ret_to)
  File "/local/incoop/hase/.direnv/python-3.6.6/lib/python3.6/site-packages/angr/sim_procedure.py", line 174, in execute
    r = getattr(inst, inst.run_func)(*sim_args, **inst.kwargs)
  File "/local/incoop/hase/hase/symbex/procedures/syscall.py", line 315, in run
    stat_t(stat_buf).store_all(self)
  File "/local/incoop/hase/hase/symbex/procedures/sym_struct.py", line 95, in store_all
    for sym, _ in self.c_cls._fields_:
AttributeError: 'stat_t' object has no attribute 'c_cls'