脚本php artisan清除编译处理返回的pre-update-cmd事件(Laravel 4.1升级)

我最近尝试从Laravel 4.0升级到Laravel 4.1,并且在运行php composer.phar更新时收到以下错误：

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-scripts] [--no-progress] [--with-dependencies] [-v|vv|vvv|--verbose] [-o|--optimize-autoloader] [packages1] ... [packagesN]

我只要求：

"require": {
        "laravel/framework": "4.1.*","way/generators": "2.*","madewithlove/laravel-oauth2": "0.4.*"
    },

此外,我收到这个错误之前(即使我在我的环境中运行php 5.4.10)：

phpseclib/phpseclib suggests installing ext-gmp (Install the GMP (GNU Multiple Precision) extension in order to speed up arbitrary precision integer arithmetic operations.)
phpseclib/phpseclib suggests installing pear-pear/PHP_Compat (Install PHP_Compat to get phpseclib working on PHP < 4.3.3.)
d11wtq/boris suggests installing ext-readline (*)
d11wtq/boris suggests installing ext-pcntl (*)
Writing lock file
Generating autoload files

编辑：

composer.json中使用的脚本：

"scripts": {
        "pre-install-cmd": [
            "php artisan clear-compiled"
        ],"post-install-cmd": [
            "php artisan optimize"
        ],"pre-update-cmd": [
            "php artisan clear-compiled"
        ],"post-update-cmd": [
            "php artisan optimize"
        ],"post-create-project-cmd": [
            "php artisan key:generate"
        ]
    },

你是否遵循升级程序？运行作曲家更新是不够的.
laravel.com/docs/upgrade