dump-autoload 报 must be of the type array

vagrant@homestead:~/Code/weibo$ clear
vagrant@homestead:~/Code/weibo$ composer dump-autoload
Generating optimized autoload files
PHP Fatal error:  Uncaught TypeError: Argument 1 passed to Composer\Autoload\ClassLoader::addClassMap() must be of the type array, inteocal/bin/composer/vendor/composer/ClassLoader.php:92
Stack trace:
#0 phar:///usr/local/bin/composer/src/Composer/Autoload/AutoloadGenerator.php(764): Composer\Autoload\ClassLoader->addClassMap(1)
#1 phar:///usr/local/bin/composer/src/Composer/Autoload/AutoloadGenerator.php(303): Composer\Autoload\AutoloadGenerator->getStaticFile(
#2 phar:///usr/local/bin/composer/src/Composer/Command/DumpAutoloadCommand.php(76): Composer\Autoload\AutoloadGenerator->dump(Object(Coer\InstallationManager), '/home/vagrant/C...', true)
#3 phar:///usr/local/ in phar:///usr/local/bin/composer/vendor/composer/ClassLoader.php on line 92

Fatal error: Uncaught TypeError: Argument 1 passed to Composer\Autoload\ClassLoader::addClassMap() must be of the type array, integer gbin/composer/vendor/composer/ClassLoader.php:92
Stack trace:
#0 phar:///usr/local/bin/composer/src/Composer/Autoload/AutoloadGenerator.php(764): Composer\Autoload\ClassLoader->addClassMap(1)
#1 phar:///usr/local/bin/composer/src/Composer/Autoload/AutoloadGenerator.php(303): Composer\Autoload\AutoloadGenerator->getStaticFile(
#2 phar:///usr/local/bin/composer/src/Composer/Command/DumpAutoloadCommand.php(76): Composer\Autoload\AutoloadGenerator->dump(Object(Coer\InstallationManager), '/home/vagrant/C...', true)
#3 phar:///usr/local/ in phar:///usr/local/bin/composer/vendor/composer/ClassLoader.php on line 92
vagrant@homestead:~/Code/weibo$

composer dump-autoload 执行后出现这个错误，本问题在laravel入门教程，heroku配置数据库时运行出现，请问各位朋友如何解决呢？