PHP artisan event:generate 报错

  ErrorException  : trim() expects parameter 1 to be string, array given

  at /home/vagrant/Code/larabbs/vendor/laravel/framework/src/Illuminate/Console/GeneratorCommand.php:215
    211|      * @return string
    212|      */
    213|     protected function getNameInput()
    214|     {
  > 215|         return trim($this->argument('name'));
    216|     }
    217|
    218|     /**
    219|      * Get the root namespace for the class.

  Exception trace:

  1   trim()
      /home/vagrant/Code/larabbs/vendor/laravel/framework/src/Illuminate/Console/GeneratorCommand.php:215

  2   Illuminate\Console\GeneratorCommand::getNameInput()
      /home/vagrant/Code/larabbs/vendor/laravel/framework/src/Illuminate/Console/GeneratorCommand.php:53

  Please use the argument -v to see more details.