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嗨，我只是尝试安装 symfony 2.1.3，但是当我尝试进入配置时。我收到错误“LogicException：容器扩展“安全”未注册”。我没有在脚本中移动任何内容，并使用作曲家进行了安装。有人有想法吗？是symfony的bug吗？非常感谢