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

Authenticator/RememberMeAuthenticator.php

@@ -69,7 +69,7 @@ public function supports(Request $request): ?bool
             return false;
         }
 
-        if (!$request->cookies->has($this->cookieName)) {
+        if (!$request->cookies->has($this->cookieName) || !\is_scalar($request->cookies->all()[$this->cookieName] ?: null)) {
             return false;
         }
 

Tests/Authenticator/RememberMeAuthenticatorTest.php

@@ -61,6 +61,9 @@ public static function provideSupportsData()
         $request = Request::create('/', 'GET', [], ['_remember_me_cookie' => 'rememberme']);
         $request->attributes->set(ResponseListener::COOKIE_ATTR_NAME, new Cookie('_remember_me_cookie', null));
         yield [$request, false];
+
+        $request = Request::create('/', 'GET', [], ['_remember_me_cookie' => '0']);
+        yield [$request, false];
     }
 
     public function testAuthenticate()