class Reproduce(torch.jit.ScriptModule):
    def __init__(self):
        super(Reproduce, self).__init__()
        self.register_buffer("cur_id", torch.tensor(0).long())

    @torch.jit.script_method
    def forward(self):
        # type: () -> List[int]

        ids_for_cur_timestep = torch.jit.annotate(List[int], [])
        # both solutions below break
        # ids_for_cur_timestep.append(self.cur_id.item())
        ids_for_cur_timestep.append(torch.jit.annotate(int, self.cur_id.item()))
        return ids_for_cur_timestep



if __name__ == '__main__':
    r = Reproduce()
    print r()

RuntimeError: 
expected an expression of type int but found number:
@torch.jit.script_method
def forward(self):
    # type: () -> List[int]

    ids_for_cur_timestep = torch.jit.annotate(List[int], [])
    # ids_for_cur_timestep.append(self.cur_id.item())
    ids_for_cur_timestep.append(torch.jit.annotate(int, self.cur_id.item()))
                                                   ~~~~~~~~~~~~~~~~~~~~~ <--- HERE
    return ids_for_cur_timestep