如题。
composer的版本是1.0-dev
laravel installer的版本是1.3.1。
php的版本是5.5.30
所生成的laravel项目为5.2.*，所需要PHP版本为5.5.9及以上。

以下是composer.json：
{
"name": "laravel/laravel",
"description": "The Laravel Framework.",
"keywords": ["framework", "laravel"],
"license": "MIT",
"type": "project",
"require": {
"php": ">=5.5.9",
"laravel/framework": "5.2."
},
"require-dev": {
"fzaninotto/faker": "~1.4",
"mockery/mockery": "0.9.",
"phpunit/phpunit": "~4.0",
"symfony/css-selector": "2.8.|3.0.",
"symfony/dom-crawler": "2.8.|3.0."
},
"autoload": {
"classmap": [
"database"
],
"psr-4": {
"App\": "app/"
}
},
"autoload-dev": {
"classmap": [
"tests/TestCase.php"
]
},
"scripts": {
"post-root-package-install": [
"php -r \"copy('.env.example', '.env');\""
],
"post-create-project-cmd": [
"php artisan key:generate"
],
"post-install-cmd": [
"php artisan clear-compiled",
"php artisan optimize"
],
"pre-update-cmd": [
"php artisan clear-compiled"
],
"post-update-cmd": [
"php artisan optimize"
]
},
"config": {
"preferred-install": "dist"
}

}

刚生成的项目运转良好。（不过需要手工设置某个缓存文件夹的读写权限，不必多说）
然后招待一次 composer update，然后项目再也运行不起来了（而且没有详细的报错信息）。
求教，是哪里出了问题呀？