所以我正在尝试在我的Mac OSX 10.10上安装一个laravel应用程序，当运行作曲家安装时，它会进入后脚本"清除编译/优化"并失败并出现以下错误：
> post-install-cmd: php artisan clear-compiled
[SymfonyComponentProcessExceptionRuntimeException]
The process has been signaled with signal "5".
Exception trace:
() at phar:///usr/local/bin/composer/vendor/symfony/process/Process.php:375
SymfonyComponentProcessProcess->wait() at phar:///usr/local/bin/composer/vendor/symfony/process/Process.php:203
SymfonyComponentProcessProcess->run() at phar:///usr/local/bin/composer/src/Composer/Util/ProcessExecutor.php:62
ComposerUtilProcessExecutor->execute() at phar:///usr/local/bin/composer/src/Composer/EventDispatcher/EventDispatcher.php:204
ComposerEventDispatcherEventDispatcher->doDispatch() at phar:///usr/local/bin/composer/src/Composer/EventDispatcher/EventDispatcher.php:94
ComposerEventDispatcherEventDispatcher->dispatchScript() at phar:///usr/local/bin/composer/src/Composer/Installer.php:337
ComposerInstaller->run() at phar:///usr/local/bin/composer/src/Composer/Command/InstallCommand.php:134
ComposerCommandInstallCommand->execute() at phar:///usr/local/bin/composer/vendor/symfony/console/Command/Command.php:259
SymfonyComponentConsoleCommandCommand->run() at phar:///usr/local/bin/composer/vendor/symfony/console/Application.php:844
SymfonyComponentConsoleApplication->doRunCommand() at phar:///usr/local/bin/composer/vendor/symfony/console/Application.php:192
SymfonyComponentConsoleApplication->doRun() at phar:///usr/local/bin/composer/src/Composer/Console/Application.php:189
ComposerConsoleApplication->doRun() at phar:///usr/local/bin/composer/vendor/symfony/console/Application.php:123
SymfonyComponentConsoleApplication->run() at phar:///usr/local/bin/composer/src/Composer/Console/Application.php:99
ComposerConsoleApplication->run() at phar:///usr/local/bin/composer/bin/composer:43
require() at /usr/local/bin/composer:24
install [--prefer-source] [--prefer-dist] [--dry-run] [--dev] [--no-dev] [--no-plugins] [--no-custom-installers] [--no-autoloader] [--no-scripts] [--no-progress] [-v|vv|vvv|--verbose] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--ignore-platform-reqs] [--] [<packages>]...
Trace/BPT trap: 5
几乎找不到关于此错误的解释方式，我发现的几个地方提供了诸如更新SVN或git之类的东西以及其他一些看似无关的解决方案。知道是什么原因造成的吗？
试试这个：
composer install --no-scripts