Laravel5.6 在控制器中执行 Artisan::call ('route:list') 500 错误？

Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator at admin@php.cn to inform them of the time this error occurred, and the actions you performed just before this error.

More information about this error may be available in the server error log.

请问各位朋友怎么处理，我之前用5.5都没有这问题？