Php 在编写器要求后，函数名必须是字符串（symfony/flex），但不能更新

在symfony 4中安装一些捆绑包执行命令时，我反复遇到相同的错误：

命令：

带堆栈跟踪的Erro

环境

操作系统：Ubuntu 16.04

PHP:7.2.5

只有当我使用composer require时才会发生这种情况，我只是更新了一些软件包，包括flex没有安装但没有抛出任何错误的软件包

---

这是一个bug吗？

这是Flex

1.0.81

中最近提出的一个bug，升级到

1.0.82

（与

1.0.80

相同）作为修补程序

---

Ref:

我已经看到了那篇文章，但它并没有解决我的问题。我今天更新了，这个问题昨天就解决了。运行composer update时，输出为“无需更新或安装”。当我运行composer show symfony/flex时，版本是dev master。取决于date@JuanI.MoralesPestanadev主版本存在与

1.0.81

相同的问题，请使用标签

1.0.82

。谢谢，已经注意到了。我只瞄准v1.0.82，一切正常。

composer require phpoffice/phpspreadsheet secit-pl/imap-bundle tbbc/money-bundle

PHP Fatal error:  Uncaught Error: Function name must be a string in /var/www/skeleton/vendor/symfony/flex/src/ParallelDownloader.php:246
Stack trace:
#0 /var/www/skeleton/vendor/symfony/flex/src/ParallelDownloader.php(84): Symfony\Flex\ParallelDownloader->getNext()
#1 phar:///usr/local/bin/composer/src/Composer/Plugin/PluginManager.php(195) : eval()'d code(452): Symfony\Flex\ParallelDownloader->download(Array, Object(Closure))
#2 [internal function]: Symfony\Flex\Flex_composer_tmp1->populateProvidersCacheDir(Object(Composer\Installer\InstallerEvent))
#3 phar:///usr/local/bin/composer/src/Composer/EventDispatcher/EventDispatcher.php(176): call_user_func(Array, Object(Composer\Installer\InstallerEvent))
#4 phar:///usr/local/bin/composer/src/Composer/EventDispatcher/EventDispatcher.php(135): Composer\EventDispatcher\EventDispatcher->doDispatch(Object(Composer\Installer\InstallerEvent))
#5 phar:///usr/local/bin/composer/src/Composer/Installer.php(471): Composer\EventDispatcher\EventDispatcher- in /var/www/skeleton/vendor/symfony/flex/src/ParallelDownloader.php on line 246

Fatal error: Uncaught Error: Function name must be a string in /var/www/skeleton/vendor/symfony/flex/src/ParallelDownloader.php:246
Stack trace:
#0 /var/www/skeleton/vendor/symfony/flex/src/ParallelDownloader.php(84): Symfony\Flex\ParallelDownloader->getNext()
#1 phar:///usr/local/bin/composer/src/Composer/Plugin/PluginManager.php(195) : eval()'d code(452): Symfony\Flex\ParallelDownloader->download(Array, Object(Closure))
#2 [internal function]: Symfony\Flex\Flex_composer_tmp1->populateProvidersCacheDir(Object(Composer\Installer\InstallerEvent))
#3 phar:///usr/local/bin/composer/src/Composer/EventDispatcher/EventDispatcher.php(176): call_user_func(Array, Object(Composer\Installer\InstallerEvent))
#4 phar:///usr/local/bin/composer/src/Composer/EventDispatcher/EventDispatcher.php(135): Composer\EventDispatcher\EventDispatcher->doDispatch(Object(Composer\Installer\InstallerEvent))
#5 phar:///usr/local/bin/composer/src/Composer/Installer.php(471): Composer\EventDispatcher\EventDispatcher- in /var/www/skeleton/vendor/symfony/flex/src/ParallelDownloader.php on line 246