Merge branch '5.4' into 6.2

* 5.4:
  [PhpUnitBridge] Kill the last concurrent process when it stales for more than 60s
  [Intl] fix test
  [Intl] Use VarExporter::export() in PhpBundleWriter
  Use triggering class to generate baseline for deprecation messages from DebugClassLoader
  [Security] Fix false-string handling in RememberMeAuthenticator
  [CssSelector] Tests on Xpath translator will always pass
  [Serializer] Fix Normalizer not utilizing converted name for index variadic param
  [DepdencyInjection] Fix costly logic when checking errored definitions
  fix children cond
  [DoctrineBridge] Load refreshed user proxy
  [DependencyInjection] Don't ignore attributes on the actual decorator
  [FrameworkBundle] Prevent `cache:clear` to lose files on subsequent runs

Author: nicolas-grekas

Command/CacheClearCommand.php

@@ -129,7 +129,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
                 if ($output->isVerbose()) {
                     $io->comment('Warming up optional cache...');
                 }
-                $this->warmupOptionals($realCacheDir);
+                $this->warmupOptionals($realCacheDir, $realBuildDir);
             }
         } else {
             $fs->mkdir($warmupDir);
@@ -144,7 +144,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
                     if ($output->isVerbose()) {
                         $io->comment('Warming up optional cache...');
                     }
-                    $this->warmupOptionals($realCacheDir);
+                    $this->warmupOptionals($useBuildDir ? $realCacheDir : $warmupDir, $warmupDir);
                 }
             }
 
@@ -239,15 +239,15 @@ private function warmup(string $warmupDir, string $realBuildDir): void
         }
     }
 
-    private function warmupOptionals(string $realCacheDir): void
+    private function warmupOptionals(string $cacheDir, string $warmupDir): void
     {
         $kernel = $this->getApplication()->getKernel();
         $warmer = $kernel->getContainer()->get('cache_warmer');
         // non optional warmers already ran during container compilation
         $warmer->enableOnlyOptionalWarmers();
-        $preload = (array) $warmer->warmUp($realCacheDir);
+        $preload = (array) $warmer->warmUp($cacheDir);
 
-        if ($preload && file_exists($preloadFile = $realCacheDir.'/'.$kernel->getContainer()->getParameter('kernel.container_class').'.preload.php')) {
+        if ($preload && file_exists($preloadFile = $warmupDir.'/'.$kernel->getContainer()->getParameter('kernel.container_class').'.preload.php')) {
             Preloader::append($preloadFile, $preload);
         }
     }