Merge branch '6.4' into 7.1

* 6.4:
  Tweak error/exception handler registration

Author: nicolas-grekas

FrameworkBundle.php

@@ -57,6 +57,7 @@
 use Symfony\Component\PropertyInfo\DependencyInjection\PropertyInfoPass;
 use Symfony\Component\Routing\DependencyInjection\AddExpressionLanguageProvidersPass;
 use Symfony\Component\Routing\DependencyInjection\RoutingResolverPass;
+use Symfony\Component\Runtime\SymfonyRuntime;
 use Symfony\Component\Scheduler\DependencyInjection\AddScheduleMessengerPass;
 use Symfony\Component\Serializer\DependencyInjection\SerializerPass;
 use Symfony\Component\Translation\DependencyInjection\DataCollectorTranslatorPass;
@@ -95,9 +96,16 @@ public function boot(): void
     {
         $_ENV['DOCTRINE_DEPRECATIONS'] = $_SERVER['DOCTRINE_DEPRECATIONS'] ??= 'trigger';
 
-        $handler = ErrorHandler::register(null, false);
+        if (class_exists(SymfonyRuntime::class)) {
+            $handler = set_error_handler('var_dump');
+            restore_error_handler();
+        } else {
+            $handler = [ErrorHandler::register(null, false)];
+        }
 
-        $this->container->get('debug.error_handler_configurator')->configure($handler);
+        if (\is_array($handler) && $handler[0] instanceof ErrorHandler) {
+            $this->container->get('debug.error_handler_configurator')->configure($handler[0]);
+        }
 
         if ($this->container->getParameter('kernel.http_method_override')) {
             Request::enableHttpMethodParameterOverride();

composer.json

@@ -92,6 +92,7 @@
         "symfony/mime": "<6.4",
         "symfony/property-info": "<6.4",
         "symfony/property-access": "<6.4",
+        "symfony/runtime": "<6.4.13|>=7.0,<7.1.6",
         "symfony/scheduler": "<6.4.4|>=7.0.0,<7.0.4",
         "symfony/serializer": "<6.4",
         "symfony/security-csrf": "<6.4",