脚本php手工清理编译处理预更新cmd事件返回错误

在运行composer更新后，我一直收到这个错误

./composer.json has been updated
> php artisan clear-compiled
  [Symfony'Component'Debug'Exception'FatalErrorException]
  Class 'Illuminate'Html'HtmlServiceProvider' not found
Script php artisan clear-compiled handling the pre-update-cmd event returned with an error
  [RuntimeException]
  Error Output:
update [--prefer-source] [--prefer-dist] [--dry-run] [--dev] [--no-dev] [--lock]
 [--no-plugins] [--no-custom-installers] [--no-autoloader] [--no-scripts] [--no-
progress] [--with-dependencies] [-v|vv|vvv|--verbose] [-o|--optimize-autoloader]
 [-a|--classmap-authoritative] [--ignore-platform-reqs] [--prefer-stable] [--pre
fer-lowest] [packages1] ... [packagesN]

在composer.json中，这是我的需求部分：

"require": {
    "php": ">=5.5.9",
    "laravel/framework": "5.1.*",
    "laravelcollective/html": "dev-master"    
},

到底是什么问题？