Heroku Symfony 3.2推送被拒绝，无法编译PHP应用程序

我在heroku上部署我的symfony web应用程序时遇到问题，而以前它工作得很好。有什么不对劲吗？ 这是生成日志：

以下是日志的相关部分：

生成优化的自动加载文件

IncenteV\ParameterHandler\ScriptHandler:：buildParameters 创建“app/config/parameters.yml”文件 Sensio\Bundle\DistributionBundle\Composer\ScriptHandler:：buildBootstrap Sensio\Bundle\DistributionBundle\Composer\ScriptHandler:：clearCache PHP致命错误：未捕获Symfony\Component\Debug\Exception\ClassNotFoundException:试图从命名空间“Sensio\Bundle\GeneratorBundle”加载类“SensioGeneratorBundle”。 您是否忘记了另一个名称空间的“use”语句？在/tmp/build_D39105BC416E68631D1261A1CA2A632/izio7-YourTeam-15b2d72/app/AppKernel.php:25中 堆栈跟踪： #0/tmp/build_d39105bc4146e68631d1261a1ca2a632/izio7-YourTeam-15b2d72/vendor/symfony/symfony/src/symfony/Component/HttpKernel/Kernel.php（403）：AppKernel->registerBundles（） #1/tmp/build_d39105bc4146e68631d1261a1ca2a632/izio7-YourTeam-15b2d72/vendor/symfony/symfony/src/symfony/Component/HttpKernel/Kernel.php（113）：symfony\Component\HttpKernel\Kernel->>initializeBundles（） #2/tmp/build_D39105BC416E68631D1261A1CA2A632/izio7-YourTeam-15b2d72/vendor/symfony/symfony/src/symfony/Bundle/FrameworkBundle/Console/Application.php（68）：symfony\Component\HttpKernel\Kernel->->boot（） #第25行的3/tmp/build_D39105BC416E68631D1261A1CA2A632/izio7-YourTeam-15b2d72/vendor/symfony/symfony/src/symfony/Component/Console/Appli-in/tmp/build_D39105BC416E68631D12611AA2A632/izio7-YourTeam-15b2d72/app/AppKernel.php Script Sensio\Bundle\DistributionBundle\Composer\ScriptHandler:：clearCache处理symfony脚本事件时异常终止

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最后我解决了，问题是系统变量SYMFONY_ENV=prod未设置。

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我建议将构建日志的相关部分粘贴到此处，以及您为解决出现的任何错误而采取的步骤，否则此处没有太多操作。

 [RuntimeException]                                                                                                                                                                                                                  
 An error occurred when executing the "'cache:clear --no-warmup'" command:                                                                                                                                                            
 PHP Fatal error:  Uncaught Symfony\Component\Debug\Exception\ClassNotFoundException: Attempted to load class "SensioGeneratorBundle" from namespace "Sensio\Bundle\GeneratorBundle".                                                
 Did you forget a "use" statement for another namespace? in /tmp/build_d39105bc4146e68631d1261a1ca2a632/izio7-YourTeam-15b2d72/app/AppKernel.php:25                                                                                  
 Stack trace:                                                                                                                                                                                                                        
 #0 /tmp/build_d39105bc4146e68631d1261a1ca2a632/izio7-YourTeam-15b2d72/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/Kernel.php(403): AppKernel->registerBundles()                                                          
 #1 /tmp/build_d39105bc4146e68631d1261a1ca2a632/izio7-YourTeam-15b2d72/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/Kernel.php(113): Symfony\Component\HttpKernel\Kernel->initializeBundles()                              
 #2 /tmp/build_d39105bc4146e68631d1261a1ca2a632/izio7-YourTeam-15b2d72/vendor/symfony/symfony/src/Symfony/Bundle/FrameworkBundle/Console/Application.php(68): Symfony\Component\HttpKernel\Kernel->boot()                            
 #3 /tmp/build_d39105bc4146e68631d1261a1ca2a632/izio7-YourTeam-15b2d72/vendor/symfony/symfony/src/Symfony/Component/Console/Appli in /tmp/build_d39105bc4146e68631d1261a1ca2a632/izio7-YourTeam-15b2d72/app/AppKernel.php on line 25