diff --git a/Argument/LazyClosure.php b/Argument/LazyClosure.php
index 3e8718643..3dcc34e4f 100644
--- a/Argument/LazyClosure.php
+++ b/Argument/LazyClosure.php
@@ -12,7 +12,6 @@
 namespace Symfony\Component\DependencyInjection\Argument;
 
 use Symfony\Component\DependencyInjection\ContainerBuilder;
-use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
 use Symfony\Component\DependencyInjection\Exception\RuntimeException;
 use Symfony\Component\DependencyInjection\Reference;
diff --git a/Attribute/AsAlias.php b/Attribute/AsAlias.php
index 2f03e5fcd..0839afa48 100644
--- a/Attribute/AsAlias.php
+++ b/Attribute/AsAlias.php
@@ -20,12 +20,20 @@
 final class AsAlias
 {
     /**
-     * @param string|null $id     The id of the alias
-     * @param bool        $public Whether to declare the alias public
+     * @var list<string>
+     */
+    public array $when = [];
+
+    /**
+     * @param string|null         $id     The id of the alias
+     * @param bool                $public Whether to declare the alias public
+     * @param string|list<string> $when   The environments under which the class will be registered as a service (i.e. "dev", "test", "prod")
      */
     public function __construct(
         public ?string $id = null,
         public bool $public = false,
+        string|array $when = [],
     ) {
+        $this->when = (array) $when;
     }
 }
diff --git a/Attribute/AsTaggedItem.php b/Attribute/AsTaggedItem.php
index 6b1a94dd3..de751213a 100644
--- a/Attribute/AsTaggedItem.php
+++ b/Attribute/AsTaggedItem.php
@@ -16,7 +16,7 @@
  *
  * @author Nicolas Grekas <p@tchwork.com>
  */
-#[\Attribute(\Attribute::TARGET_CLASS)]
+#[\Attribute(\Attribute::TARGET_CLASS | \Attribute::IS_REPEATABLE)]
 class AsTaggedItem
 {
     /**
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4287747ec..df3486a9d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,18 @@
 CHANGELOG
 =========
 
+7.3
+---
+
+ * Make `#[AsTaggedItem]` repeatable
+ * Support `@>` as a shorthand for `!service_closure` in yaml files
+ * Don't skip classes with private constructor when autodiscovering
+ * Add `Definition::addResourceTag()` and `ContainerBuilder::findTaggedResourceIds()`
+   for auto-configuration of classes excluded from the service container
+ * Accept multiple auto-configuration callbacks for the same attribute class
+ * Leverage native lazy objects when possible for lazy services
+ * Add `when` argument to `#[AsAlias]`
+
 7.2
 ---
 
diff --git a/Compiler/AbstractRecursivePass.php b/Compiler/AbstractRecursivePass.php
index dd8c9cd29..55f8ee7e9 100644
--- a/Compiler/AbstractRecursivePass.php
+++ b/Compiler/AbstractRecursivePass.php
@@ -181,7 +181,7 @@ protected function getConstructor(Definition $definition, bool $required): ?\Ref
                 throw new RuntimeException(\sprintf('Invalid service "%s": class%s has no constructor.', $this->currentId, \sprintf($class !== $this->currentId ? ' "%s"' : '', $class)));
             }
         } elseif (!$r->isPublic()) {
-            throw new RuntimeException(\sprintf('Invalid service "%s": ', $this->currentId).\sprintf($class !== $this->currentId ? 'constructor of class "%s"' : 'its constructor', $class).' must be public.');
+            throw new RuntimeException(\sprintf('Invalid service "%s": ', $this->currentId).\sprintf($class !== $this->currentId ? 'constructor of class "%s"' : 'its constructor', $class).' must be public. Did you miss configuring a factory or a static constructor? Try using the "#[Autoconfigure(constructor: ...)]" attribute for the latter.');
         }
 
         return $r;
diff --git a/Compiler/AttributeAutoconfigurationPass.php b/Compiler/AttributeAutoconfigurationPass.php
index 9c3b98eab..bbf341913 100644
--- a/Compiler/AttributeAutoconfigurationPass.php
+++ b/Compiler/AttributeAutoconfigurationPass.php
@@ -31,49 +31,51 @@ final class AttributeAutoconfigurationPass extends AbstractRecursivePass
 
     public function process(ContainerBuilder $container): void
     {
-        if (!$container->getAutoconfiguredAttributes()) {
+        if (!$container->getAttributeAutoconfigurators()) {
             return;
         }
 
-        foreach ($container->getAutoconfiguredAttributes() as $attributeName => $callable) {
-            $callableReflector = new \ReflectionFunction($callable(...));
-            if ($callableReflector->getNumberOfParameters() <= 2) {
-                $this->classAttributeConfigurators[$attributeName] = $callable;
-                continue;
-            }
+        foreach ($container->getAttributeAutoconfigurators() as $attributeName => $callables) {
+            foreach ($callables as $callable) {
+                $callableReflector = new \ReflectionFunction($callable(...));
+                if ($callableReflector->getNumberOfParameters() <= 2) {
+                    $this->classAttributeConfigurators[$attributeName][] = $callable;
+                    continue;
+                }
 
-            $reflectorParameter = $callableReflector->getParameters()[2];
-            $parameterType = $reflectorParameter->getType();
-            $types = [];
-            if ($parameterType instanceof \ReflectionUnionType) {
-                foreach ($parameterType->getTypes() as $type) {
-                    $types[] = $type->getName();
+                $reflectorParameter = $callableReflector->getParameters()[2];
+                $parameterType = $reflectorParameter->getType();
+                $types = [];
+                if ($parameterType instanceof \ReflectionUnionType) {
+                    foreach ($parameterType->getTypes() as $type) {
+                        $types[] = $type->getName();
+                    }
+                } elseif ($parameterType instanceof \ReflectionNamedType) {
+                    $types[] = $parameterType->getName();
+                } else {
+                    throw new LogicException(\sprintf('Argument "$%s" of attribute autoconfigurator should have a type, use one or more of "\ReflectionClass|\ReflectionMethod|\ReflectionProperty|\ReflectionParameter|\Reflector" in "%s" on line "%d".', $reflectorParameter->getName(), $callableReflector->getFileName(), $callableReflector->getStartLine()));
                 }
-            } elseif ($parameterType instanceof \ReflectionNamedType) {
-                $types[] = $parameterType->getName();
-            } else {
-                throw new LogicException(\sprintf('Argument "$%s" of attribute autoconfigurator should have a type, use one or more of "\ReflectionClass|\ReflectionMethod|\ReflectionProperty|\ReflectionParameter|\Reflector" in "%s" on line "%d".', $reflectorParameter->getName(), $callableReflector->getFileName(), $callableReflector->getStartLine()));
-            }
 
-            try {
-                $attributeReflector = new \ReflectionClass($attributeName);
-            } catch (\ReflectionException) {
-                continue;
-            }
+                try {
+                    $attributeReflector = new \ReflectionClass($attributeName);
+                } catch (\ReflectionException) {
+                    continue;
+                }
 
-            $targets = $attributeReflector->getAttributes(\Attribute::class)[0] ?? 0;
-            $targets = $targets ? $targets->getArguments()[0] ?? -1 : 0;
+                $targets = $attributeReflector->getAttributes(\Attribute::class)[0] ?? 0;
+                $targets = $targets ? $targets->getArguments()[0] ?? -1 : 0;
 
-            foreach (['class', 'method', 'property', 'parameter'] as $symbol) {
-                if (['Reflector'] !== $types) {
-                    if (!\in_array('Reflection'.ucfirst($symbol), $types, true)) {
-                        continue;
-                    }
-                    if (!($targets & \constant('Attribute::TARGET_'.strtoupper($symbol)))) {
-                        throw new LogicException(\sprintf('Invalid type "Reflection%s" on argument "$%s": attribute "%s" cannot target a '.$symbol.' in "%s" on line "%d".', ucfirst($symbol), $reflectorParameter->getName(), $attributeName, $callableReflector->getFileName(), $callableReflector->getStartLine()));
+                foreach (['class', 'method', 'property', 'parameter'] as $symbol) {
+                    if (['Reflector'] !== $types) {
+                        if (!\in_array('Reflection'.ucfirst($symbol), $types, true)) {
+                            continue;
+                        }
+                        if (!($targets & \constant('Attribute::TARGET_'.strtoupper($symbol)))) {
+                            throw new LogicException(\sprintf('Invalid type "Reflection%s" on argument "$%s": attribute "%s" cannot target a '.$symbol.' in "%s" on line "%d".', ucfirst($symbol), $reflectorParameter->getName(), $attributeName, $callableReflector->getFileName(), $callableReflector->getStartLine()));
+                        }
                     }
+                    $this->{$symbol.'AttributeConfigurators'}[$attributeName][] = $callable;
                 }
-                $this->{$symbol.'AttributeConfigurators'}[$attributeName] = $callable;
             }
         }
 
@@ -94,13 +96,7 @@ protected function processValue(mixed $value, bool $isRoot = false): mixed
         $instanceof = $value->getInstanceofConditionals();
         $conditionals = $instanceof[$classReflector->getName()] ?? new ChildDefinition('');
 
-        if ($this->classAttributeConfigurators) {
-            foreach ($classReflector->getAttributes() as $attribute) {
-                if ($configurator = $this->findConfigurator($this->classAttributeConfigurators, $attribute->getName())) {
-                    $configurator($conditionals, $attribute->newInstance(), $classReflector);
-                }
-            }
-        }
+        $this->callConfigurators($this->classAttributeConfigurators, $conditionals, $classReflector);
 
         if ($this->parameterAttributeConfigurators) {
             try {
@@ -111,11 +107,7 @@ protected function processValue(mixed $value, bool $isRoot = false): mixed
 
             if ($constructorReflector) {
                 foreach ($constructorReflector->getParameters() as $parameterReflector) {
-                    foreach ($parameterReflector->getAttributes() as $attribute) {
-                        if ($configurator = $this->findConfigurator($this->parameterAttributeConfigurators, $attribute->getName())) {
-                            $configurator($conditionals, $attribute->newInstance(), $parameterReflector);
-                        }
-                    }
+                    $this->callConfigurators($this->parameterAttributeConfigurators, $conditionals, $parameterReflector);
                 }
             }
         }
@@ -126,22 +118,10 @@ protected function processValue(mixed $value, bool $isRoot = false): mixed
                     continue;
                 }
 
-                if ($this->methodAttributeConfigurators) {
-                    foreach ($methodReflector->getAttributes() as $attribute) {
-                        if ($configurator = $this->findConfigurator($this->methodAttributeConfigurators, $attribute->getName())) {
-                            $configurator($conditionals, $attribute->newInstance(), $methodReflector);
-                        }
-                    }
-                }
+                $this->callConfigurators($this->methodAttributeConfigurators, $conditionals, $methodReflector);
 
-                if ($this->parameterAttributeConfigurators) {
-                    foreach ($methodReflector->getParameters() as $parameterReflector) {
-                        foreach ($parameterReflector->getAttributes() as $attribute) {
-                            if ($configurator = $this->findConfigurator($this->parameterAttributeConfigurators, $attribute->getName())) {
-                                $configurator($conditionals, $attribute->newInstance(), $parameterReflector);
-                            }
-                        }
-                    }
+                foreach ($methodReflector->getParameters() as $parameterReflector) {
+                    $this->callConfigurators($this->parameterAttributeConfigurators, $conditionals, $parameterReflector);
                 }
             }
         }
@@ -152,11 +132,7 @@ protected function processValue(mixed $value, bool $isRoot = false): mixed
                     continue;
                 }
 
-                foreach ($propertyReflector->getAttributes() as $attribute) {
-                    if ($configurator = $this->findConfigurator($this->propertyAttributeConfigurators, $attribute->getName())) {
-                        $configurator($conditionals, $attribute->newInstance(), $propertyReflector);
-                    }
-                }
+                $this->callConfigurators($this->propertyAttributeConfigurators, $conditionals, $propertyReflector);
             }
         }
 
@@ -168,19 +144,37 @@ protected function processValue(mixed $value, bool $isRoot = false): mixed
         return parent::processValue($value, $isRoot);
     }
 
+    /**
+     * Call all the configurators for the given attribute.
+     *
+     * @param array<class-string, callable[]> $configurators
+     */
+    private function callConfigurators(array &$configurators, ChildDefinition $conditionals, \ReflectionClass|\ReflectionMethod|\ReflectionParameter|\ReflectionProperty $reflector): void
+    {
+        if (!$configurators) {
+            return;
+        }
+
+        foreach ($reflector->getAttributes() as $attribute) {
+            foreach ($this->findConfigurators($configurators, $attribute->getName()) as $configurator) {
+                $configurator($conditionals, $attribute->newInstance(), $reflector);
+            }
+        }
+    }
+
     /**
      * Find the first configurator for the given attribute name, looking up the class hierarchy.
      */
-    private function findConfigurator(array &$configurators, string $attributeName): ?callable
+    private function findConfigurators(array &$configurators, string $attributeName): array
     {
         if (\array_key_exists($attributeName, $configurators)) {
             return $configurators[$attributeName];
         }
 
         if (class_exists($attributeName) && $parent = get_parent_class($attributeName)) {
-            return $configurators[$attributeName] = self::findConfigurator($configurators, $parent);
+            return $configurators[$attributeName] = $this->findConfigurators($configurators, $parent);
         }
 
-        return $configurators[$attributeName] = null;
+        return $configurators[$attributeName] = [];
     }
 }
diff --git a/Compiler/CheckCircularReferencesPass.php b/Compiler/CheckCircularReferencesPass.php
index 7adb0b4d8..8a7c11383 100644
--- a/Compiler/CheckCircularReferencesPass.php
+++ b/Compiler/CheckCircularReferencesPass.php
@@ -62,7 +62,7 @@ private function checkOutEdges(array $edges): void
                 continue;
             }
 
-            $isLeaf = !!$node->getValue();
+            $isLeaf = (bool) $node->getValue();
             $isConcrete = !$edge->isLazy() && !$edge->isWeak();
 
             // Skip already checked lazy services if they are still lazy. Will not gain any new information.
diff --git a/Compiler/PriorityTaggedServiceTrait.php b/Compiler/PriorityTaggedServiceTrait.php
index e3a4eba27..8c6b5b582 100644
--- a/Compiler/PriorityTaggedServiceTrait.php
+++ b/Compiler/PriorityTaggedServiceTrait.php
@@ -64,6 +64,7 @@ private function findAndSortTaggedServices(string|TaggedIteratorArgument $tagNam
             $definition = $container->getDefinition($serviceId);
             $class = $definition->getClass();
             $class = $container->getParameterBag()->resolveValue($class) ?: null;
+            $reflector = null !== $class ? $container->getReflectionClass($class) : null;
             $checkTaggedItem = !$definition->hasTag($definition->isAutoconfigured() ? 'container.ignore_attributes' : $tagName);
 
             foreach ($attributes as $attribute) {
@@ -71,8 +72,8 @@ private function findAndSortTaggedServices(string|TaggedIteratorArgument $tagNam
 
                 if (isset($attribute['priority'])) {
                     $priority = $attribute['priority'];
-                } elseif (null === $defaultPriority && $defaultPriorityMethod && $class) {
-                    $defaultPriority = PriorityTaggedServiceUtil::getDefault($container, $serviceId, $class, $defaultPriorityMethod, $tagName, 'priority', $checkTaggedItem);
+                } elseif (null === $defaultPriority && $defaultPriorityMethod && $reflector) {
+                    $defaultPriority = PriorityTaggedServiceUtil::getDefault($serviceId, $reflector, $defaultPriorityMethod, $tagName, 'priority', $checkTaggedItem);
                 }
                 $priority ??= $defaultPriority ??= 0;
 
@@ -84,13 +85,28 @@ private function findAndSortTaggedServices(string|TaggedIteratorArgument $tagNam
                 if (null !== $indexAttribute && isset($attribute[$indexAttribute])) {
                     $index = $parameterBag->resolveValue($attribute[$indexAttribute]);
                 }
-                if (null === $index && null === $defaultIndex && $defaultPriorityMethod && $class) {
-                    $defaultIndex = PriorityTaggedServiceUtil::getDefault($container, $serviceId, $class, $defaultIndexMethod ?? 'getDefaultName', $tagName, $indexAttribute, $checkTaggedItem);
+                if (null === $index && null === $defaultIndex && $defaultPriorityMethod && $reflector) {
+                    $defaultIndex = PriorityTaggedServiceUtil::getDefault($serviceId, $reflector, $defaultIndexMethod ?? 'getDefaultName', $tagName, $indexAttribute, $checkTaggedItem);
                 }
                 $index ??= $defaultIndex ??= $definition->getTag('container.decorator')[0]['id'] ?? $serviceId;
 
                 $services[] = [$priority, ++$i, $index, $serviceId, $class];
             }
+
+            if ($reflector) {
+                $attributes = $reflector->getAttributes(AsTaggedItem::class);
+                $attributeCount = \count($attributes);
+
+                foreach ($attributes as $attribute) {
+                    $instance = $attribute->newInstance();
+
+                    if (!$instance->index && 1 < $attributeCount) {
+                        throw new InvalidArgumentException(\sprintf('Attribute "%s" on class "%s" cannot have an empty index when repeated.', AsTaggedItem::class, $class));
+                    }
+
+                    $services[] = [$instance->priority ?? 0, ++$i, $instance->index ?? $serviceId, $serviceId, $class];
+                }
+            }
         }
 
         uasort($services, static fn ($a, $b) => $b[0] <=> $a[0] ?: $a[1] <=> $b[1]);
@@ -121,9 +137,11 @@ private function findAndSortTaggedServices(string|TaggedIteratorArgument $tagNam
  */
 class PriorityTaggedServiceUtil
 {
-    public static function getDefault(ContainerBuilder $container, string $serviceId, string $class, string $defaultMethod, string $tagName, ?string $indexAttribute, bool $checkTaggedItem): string|int|null
+    public static function getDefault(string $serviceId, \ReflectionClass $r, string $defaultMethod, string $tagName, ?string $indexAttribute, bool $checkTaggedItem): string|int|null
     {
-        if (!($r = $container->getReflectionClass($class)) || (!$checkTaggedItem && !$r->hasMethod($defaultMethod))) {
+        $class = $r->getName();
+
+        if (!$checkTaggedItem && !$r->hasMethod($defaultMethod)) {
             return null;
         }
 
diff --git a/Compiler/ResolveBindingsPass.php b/Compiler/ResolveBindingsPass.php
index 4fca2081b..b2c6f6ef7 100644
--- a/Compiler/ResolveBindingsPass.php
+++ b/Compiler/ResolveBindingsPass.php
@@ -228,7 +228,7 @@ protected function processValue(mixed $value, bool $isRoot = false): mixed
 
             foreach ($names as $key => $name) {
                 if (\array_key_exists($name, $arguments) && (0 === $key || \array_key_exists($key - 1, $arguments))) {
-                    if (!array_key_exists($key, $arguments)) {
+                    if (!\array_key_exists($key, $arguments)) {
                         $arguments[$key] = $arguments[$name];
                     }
                     unset($arguments[$name]);
diff --git a/Compiler/ResolveInstanceofConditionalsPass.php b/Compiler/ResolveInstanceofConditionalsPass.php
index 90d4569c4..8b0a804dc 100644
--- a/Compiler/ResolveInstanceofConditionalsPass.php
+++ b/Compiler/ResolveInstanceofConditionalsPass.php
@@ -149,6 +149,11 @@ private function processDefinition(ContainerBuilder $container, string $id, Defi
                 ->setAbstract(true);
         }
 
+        if ($definition->isSynthetic()) {
+            // Ignore container.excluded tag on synthetic services
+            $definition->clearTag('container.excluded');
+        }
+
         return $definition;
     }
 
diff --git a/ContainerBuilder.php b/ContainerBuilder.php
index e978cac41..4d2b7f96b 100644
--- a/ContainerBuilder.php
+++ b/ContainerBuilder.php
@@ -129,7 +129,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
     private array $autoconfiguredInstanceof = [];
 
     /**
-     * @var array<string, callable>
+     * @var array<string, callable[]>
      */
     private array $autoconfiguredAttributes = [];
 
@@ -717,12 +717,11 @@ public function merge(self $container): void
             $this->autoconfiguredInstanceof[$interface] = $childDefinition;
         }
 
-        foreach ($container->getAutoconfiguredAttributes() as $attribute => $configurator) {
-            if (isset($this->autoconfiguredAttributes[$attribute])) {
-                throw new InvalidArgumentException(\sprintf('"%s" has already been autoconfigured and merge() does not support merging autoconfiguration for the same attribute.', $attribute));
-            }
-
-            $this->autoconfiguredAttributes[$attribute] = $configurator;
+        foreach ($container->getAttributeAutoconfigurators() as $attribute => $configurators) {
+            $this->autoconfiguredAttributes[$attribute] = array_merge(
+                $this->autoconfiguredAttributes[$attribute] ?? [],
+                $configurators)
+            ;
         }
     }
 
@@ -1175,7 +1174,7 @@ private function createService(Definition $definition, array &$inlineServices, b
             if (!$definition->isDeprecated() && \is_array($factory) && \is_string($factory[0])) {
                 $r = new \ReflectionClass($factory[0]);
 
-                if (0 < strpos($r->getDocComment(), "\n * @deprecated ")) {
+                if (0 < strpos($r->getDocComment() ?: '', "\n * @deprecated ")) {
                     trigger_deprecation('', '', 'The "%s" service relies on the deprecated "%s" factory class. It should either be deprecated or its factory upgraded.', $id, $r->name);
                 }
             }
@@ -1192,7 +1191,7 @@ private function createService(Definition $definition, array &$inlineServices, b
                 $service = $r->getConstructor() ? $r->newInstanceArgs($arguments) : $r->newInstance();
             }
 
-            if (!$definition->isDeprecated() && 0 < strpos($r->getDocComment(), "\n * @deprecated ")) {
+            if (!$definition->isDeprecated() && 0 < strpos($r->getDocComment() ?: '', "\n * @deprecated ")) {
                 trigger_deprecation('', '', 'The "%s" service relies on the deprecated "%s" class. It should either be deprecated or its implementation upgraded.', $id, $r->name);
             }
         }
@@ -1353,6 +1352,38 @@ public function findTaggedServiceIds(string $name, bool $throwOnAbstract = false
         return $tags;
     }
 
+    /**
+     * Returns service ids for a given tag, asserting they have the "container.excluded" tag.
+     *
+     *  Example:
+     *
+     *      $container->register('foo')->addResourceTag('my.tag', ['hello' => 'world'])
+     *
+     *      $serviceIds = $container->findTaggedResourceIds('my.tag');
+     *      foreach ($serviceIds as $serviceId => $tags) {
+     *          foreach ($tags as $tag) {
+     *              echo $tag['hello'];
+     *          }
+     *      }
+     *
+     * @return array<string, array> An array of tags with the tagged service as key, holding a list of attribute arrays
+     */
+    public function findTaggedResourceIds(string $tagName): array
+    {
+        $this->usedTags[] = $tagName;
+        $tags = [];
+        foreach ($this->getDefinitions() as $id => $definition) {
+            if ($definition->hasTag($tagName)) {
+                if (!$definition->hasTag('container.excluded')) {
+                    throw new InvalidArgumentException(\sprintf('The resource "%s" tagged "%s" is missing the "container.excluded" tag.', $id, $tagName));
+                }
+                $tags[$id] = $definition->getTag($tagName);
+            }
+        }
+
+        return $tags;
+    }
+
     /**
      * Returns all tags the defined services use.
      *
@@ -1418,7 +1449,7 @@ public function registerForAutoconfiguration(string $interface): ChildDefinition
      */
     public function registerAttributeForAutoconfiguration(string $attributeClass, callable $configurator): void
     {
-        $this->autoconfiguredAttributes[$attributeClass] = $configurator;
+        $this->autoconfiguredAttributes[$attributeClass][] = $configurator;
     }
 
     /**
@@ -1459,9 +1490,30 @@ public function getAutoconfiguredInstanceof(): array
     }
 
     /**
-     * @return array<string, callable>
+     * @return array<class-string, callable>
+     *
+     * @deprecated Use {@see getAttributeAutoconfigurators()} instead
      */
     public function getAutoconfiguredAttributes(): array
+    {
+        trigger_deprecation('symfony/dependency-injection', '7.3', 'The "%s()" method is deprecated, use "getAttributeAutoconfigurators()" instead.', __METHOD__);
+
+        $autoconfiguredAttributes = [];
+        foreach ($this->autoconfiguredAttributes as $attribute => $configurators) {
+            if (\count($configurators) > 1) {
+                throw new LogicException(\sprintf('The "%s" attribute has %d configurators. Use "getAttributeAutoconfigurators()" to get all of them.', $attribute, \count($configurators)));
+            }
+
+            $autoconfiguredAttributes[$attribute] = $configurators[0];
+        }
+
+        return $autoconfiguredAttributes;
+    }
+
+    /**
+     * @return array<class-string, callable[]>
+     */
+    public function getAttributeAutoconfigurators(): array
     {
         return $this->autoconfiguredAttributes;
     }
diff --git a/ContainerInterface.php b/ContainerInterface.php
index 39fd080c3..6d6f6d3bf 100644
--- a/ContainerInterface.php
+++ b/ContainerInterface.php
@@ -33,11 +33,13 @@ interface ContainerInterface extends PsrContainerInterface
     public function set(string $id, ?object $service): void;
 
     /**
+     * @template C of object
      * @template B of self::*_REFERENCE
      *
-     * @param B $invalidBehavior
+     * @param string|class-string<C> $id
+     * @param B                      $invalidBehavior
      *
-     * @psalm-return (B is self::EXCEPTION_ON_INVALID_REFERENCE|self::RUNTIME_EXCEPTION_ON_INVALID_REFERENCE ? object : object|null)
+     * @return ($id is class-string<C> ? (B is 0|1 ? C|object : C|object|null) : (B is 0|1 ? object : object|null))
      *
      * @throws ServiceCircularReferenceException When a circular reference is detected
      * @throws ServiceNotFoundException          When the service is not defined
diff --git a/Definition.php b/Definition.php
index 0abdc5d56..61cc0b9d6 100644
--- a/Definition.php
+++ b/Definition.php
@@ -455,6 +455,20 @@ public function addTag(string $name, array $attributes = []): static
         return $this;
     }
 
+    /**
+     * Adds a "resource" tag to the definition and marks it as excluded.
+     *
+     * These definitions should be processed using {@see ContainerBuilder::findTaggedResourceIds()}
+     *
+     * @return $this
+     */
+    public function addResourceTag(string $name, array $attributes = []): static
+    {
+        return $this->addTag($name, $attributes)
+            ->addTag('container.excluded', ['source' => \sprintf('by tag "%s"', $name)])
+            ->setAbstract(true);
+    }
+
     /**
      * Whether this definition has a tag with the given name.
      */
diff --git a/Dumper/PhpDumper.php b/Dumper/PhpDumper.php
index 9568ad26b..fb2d45f92 100644
--- a/Dumper/PhpDumper.php
+++ b/Dumper/PhpDumper.php
@@ -527,7 +527,7 @@ private function collectLineage(string $class, array &$lineage): void
             return;
         }
         $file = $r->getFileName();
-        if (str_ends_with($file, ') : eval()\'d code')) {
+        if ($file && str_ends_with($file, ') : eval()\'d code')) {
             $file = substr($file, 0, strrpos($file, '(', -17));
         }
         if (!$file || $this->doExport($file) === $exportedFile = $this->export($file)) {
@@ -574,12 +574,13 @@ private function generateProxyClasses(): array
                     continue;
                 }
                 do {
-                    $file = $r->getFileName();
-                    if (str_ends_with($file, ') : eval()\'d code')) {
-                        $file = substr($file, 0, strrpos($file, '(', -17));
-                    }
-                    if (is_file($file)) {
-                        $this->container->addResource(new FileResource($file));
+                    if ($file = $r->getFileName()) {
+                        if (str_ends_with($file, ') : eval()\'d code')) {
+                            $file = substr($file, 0, strrpos($file, '(', -17));
+                        }
+                        if (is_file($file)) {
+                            $this->container->addResource(new FileResource($file));
+                        }
                     }
                     $r = $r->getParentClass() ?: null;
                 } while ($r?->isUserDefined());
diff --git a/ExpressionLanguage.php b/ExpressionLanguage.php
index 84d45dbdd..79de5b049 100644
--- a/ExpressionLanguage.php
+++ b/ExpressionLanguage.php
@@ -27,8 +27,12 @@
  */
 class ExpressionLanguage extends BaseExpressionLanguage
 {
-    public function __construct(?CacheItemPoolInterface $cache = null, array $providers = [], ?callable $serviceCompiler = null, ?\Closure $getEnv = null)
+    public function __construct(?CacheItemPoolInterface $cache = null, iterable $providers = [], ?callable $serviceCompiler = null, ?\Closure $getEnv = null)
     {
+        if (!\is_array($providers)) {
+            $providers = iterator_to_array($providers, false);
+        }
+
         // prepend the default provider to let users override it easily
         array_unshift($providers, new ExpressionLanguageProvider($serviceCompiler, $getEnv));
 
diff --git a/LazyProxy/Instantiator/LazyServiceInstantiator.php b/LazyProxy/Instantiator/LazyServiceInstantiator.php
index f5e7dead5..107482562 100644
--- a/LazyProxy/Instantiator/LazyServiceInstantiator.php
+++ b/LazyProxy/Instantiator/LazyServiceInstantiator.php
@@ -29,10 +29,19 @@ public function instantiateProxy(ContainerInterface $container, Definition $defi
             throw new InvalidArgumentException(\sprintf('Cannot instantiate lazy proxy for service "%s".', $id));
         }
 
-        if (!class_exists($proxyClass = $dumper->getProxyClass($definition, $asGhostObject), false)) {
+        if (\PHP_VERSION_ID >= 80400 && $asGhostObject) {
+            return (new \ReflectionClass($definition->getClass()))->newLazyGhost(static function ($ghost) use ($realInstantiator) { $realInstantiator($ghost); });
+        }
+
+        $class = null;
+        if (!class_exists($proxyClass = $dumper->getProxyClass($definition, $asGhostObject, $class), false)) {
             eval($dumper->getProxyCode($definition, $id));
         }
 
-        return $asGhostObject ? $proxyClass::createLazyGhost($realInstantiator) : $proxyClass::createLazyProxy($realInstantiator);
+        if ($definition->getClass() === $proxyClass) {
+            return $class->newLazyProxy($realInstantiator);
+        }
+
+        return \PHP_VERSION_ID < 80400 && $asGhostObject ? $proxyClass::createLazyGhost($realInstantiator) : $proxyClass::createLazyProxy($realInstantiator);
     }
 }
diff --git a/LazyProxy/PhpDumper/LazyServiceDumper.php b/LazyProxy/PhpDumper/LazyServiceDumper.php
index b335fa378..c534630e3 100644
--- a/LazyProxy/PhpDumper/LazyServiceDumper.php
+++ b/LazyProxy/PhpDumper/LazyServiceDumper.php
@@ -56,9 +56,21 @@ public function isProxyCandidate(Definition $definition, ?bool &$asGhostObject =
             }
         }
 
+        if (\PHP_VERSION_ID < 80400) {
+            try {
+                $asGhostObject = (bool) ProxyHelper::generateLazyGhost(new \ReflectionClass($class));
+            } catch (LogicException) {
+            }
+
+            return true;
+        }
+
         try {
-            $asGhostObject = (bool) ProxyHelper::generateLazyGhost(new \ReflectionClass($class));
-        } catch (LogicException) {
+            $asGhostObject = (bool) (new \ReflectionClass($class))->newLazyGhost(static fn () => null);
+        } catch (\Error $e) {
+            if (__FILE__ !== $e->getFile()) {
+                throw $e;
+            }
         }
 
         return true;
@@ -76,6 +88,16 @@ public function getProxyFactoryCode(Definition $definition, string $id, string $
         $proxyClass = $this->getProxyClass($definition, $asGhostObject);
 
         if (!$asGhostObject) {
+            if ($definition->getClass() === $proxyClass) {
+                return <<<EOF
+                        if (true === \$lazyLoad) {
+                            $instantiation new \ReflectionClass('$proxyClass')->newLazyProxy(static fn () => $factoryCode);
+                        }
+
+
+                EOF;
+            }
+
             return <<<EOF
                     if (true === \$lazyLoad) {
                         $instantiation \$container->createProxy('$proxyClass', static fn () => \\$proxyClass::createLazyProxy(static fn () => $factoryCode));
@@ -85,11 +107,23 @@ public function getProxyFactoryCode(Definition $definition, string $id, string $
             EOF;
         }
 
-        $factoryCode = \sprintf('static fn ($proxy) => %s', $factoryCode);
+        if (\PHP_VERSION_ID < 80400) {
+            $factoryCode = \sprintf('static fn ($proxy) => %s', $factoryCode);
+
+            return <<<EOF
+                    if (true === \$lazyLoad) {
+                        $instantiation \$container->createProxy('$proxyClass', static fn () => \\$proxyClass::createLazyGhost($factoryCode));
+                    }
+
+
+            EOF;
+        }
+
+        $factoryCode = \sprintf('static function ($proxy) use ($container) { %s; }', $factoryCode);
 
         return <<<EOF
                 if (true === \$lazyLoad) {
-                    $instantiation \$container->createProxy('$proxyClass', static fn () => \\$proxyClass::createLazyGhost($factoryCode));
+                    $instantiation new \ReflectionClass('$proxyClass')->newLazyGhost($factoryCode);
                 }
 
 
@@ -104,12 +138,21 @@ public function getProxyCode(Definition $definition, ?string $id = null): string
         $proxyClass = $this->getProxyClass($definition, $asGhostObject, $class);
 
         if ($asGhostObject) {
+            if (\PHP_VERSION_ID >= 80400) {
+                return '';
+            }
+
             try {
                 return ($class?->isReadOnly() ? 'readonly ' : '').'class '.$proxyClass.ProxyHelper::generateLazyGhost($class);
             } catch (LogicException $e) {
                 throw new InvalidArgumentException(\sprintf('Cannot generate lazy ghost for service "%s".', $id ?? $definition->getClass()), 0, $e);
             }
         }
+
+        if ($definition->getClass() === $proxyClass) {
+            return '';
+        }
+
         $interfaces = [];
 
         if ($definition->hasTag('proxy')) {
@@ -144,8 +187,28 @@ public function getProxyClass(Definition $definition, bool $asGhostObject, ?\Ref
         $class = 'object' !== $definition->getClass() ? $definition->getClass() : 'stdClass';
         $class = new \ReflectionClass($class);
 
-        return preg_replace('/^.*\\\\/', '', $definition->getClass())
-            .($asGhostObject ? 'Ghost' : 'Proxy')
+        if (\PHP_VERSION_ID < 80400) {
+            return preg_replace('/^.*\\\\/', '', $definition->getClass())
+                .($asGhostObject ? 'Ghost' : 'Proxy')
+                .ucfirst(substr(hash('xxh128', $this->salt.'+'.$class->name.'+'.serialize($definition->getTag('proxy'))), -7));
+        }
+
+        if ($asGhostObject) {
+            return $class->name;
+        }
+
+        if (!$definition->hasTag('proxy') && !$class->isAbstract()) {
+            $parent = $class;
+            do {
+                $extendsInternalClass = $parent->isInternal();
+            } while (!$extendsInternalClass && $parent = $parent->getParentClass());
+
+            if (!$extendsInternalClass) {
+                return $class->name;
+            }
+        }
+
+        return preg_replace('/^.*\\\\/', '', $definition->getClass()).'Proxy'
             .ucfirst(substr(hash('xxh128', $this->salt.'+'.$class->name.'+'.serialize($definition->getTag('proxy'))), -7));
     }
 }
diff --git a/Loader/FileLoader.php b/Loader/FileLoader.php
index a4d812e37..bc38767bc 100644
--- a/Loader/FileLoader.php
+++ b/Loader/FileLoader.php
@@ -126,7 +126,7 @@ public function registerClasses(Definition $prototype, string $namespace, string
 
         $autoconfigureAttributes = new RegisterAutoconfigureAttributesPass();
         $autoconfigureAttributes = $autoconfigureAttributes->accept($prototype) ? $autoconfigureAttributes : null;
-        $classes = $this->findClasses($namespace, $resource, (array) $exclude, $autoconfigureAttributes, $source);
+        $classes = $this->findClasses($namespace, $resource, (array) $exclude, $source);
 
         $getPrototype = static fn () => clone $prototype;
         $serialized = serialize($prototype);
@@ -188,39 +188,48 @@ public function registerClasses(Definition $prototype, string $namespace, string
                 }
             }
 
-            if (interface_exists($class, false)) {
-                $this->interfaces[] = $class;
-            } else {
-                $this->setDefinition($class, $definition = $getPrototype());
-                if (null !== $errorMessage) {
-                    $definition->addError($errorMessage);
-
-                    continue;
+            $r = null === $errorMessage ? $this->container->getReflectionClass($class) : null;
+            if ($r?->isAbstract() || $r?->isInterface()) {
+                if ($r->isInterface()) {
+                    $this->interfaces[] = $class;
                 }
-                $definition->setClass($class);
+                $autoconfigureAttributes?->processClass($this->container, $r);
+                continue;
+            }
 
-                $interfaces = [];
-                foreach (class_implements($class, false) as $interface) {
-                    $this->singlyImplemented[$interface] = ($this->singlyImplemented[$interface] ?? $class) !== $class ? false : $class;
-                    $interfaces[] = $interface;
-                }
+            $this->setDefinition($class, $definition = $getPrototype());
+            if (null !== $errorMessage) {
+                $definition->addError($errorMessage);
 
-                if (!$autoconfigureAttributes) {
-                    continue;
+                continue;
+            }
+            $definition->setClass($class);
+
+            $interfaces = [];
+            foreach (class_implements($class, false) as $interface) {
+                $this->singlyImplemented[$interface] = ($this->singlyImplemented[$interface] ?? $class) !== $class ? false : $class;
+                $interfaces[] = $interface;
+            }
+
+            if (!$autoconfigureAttributes) {
+                continue;
+            }
+            $r = $this->container->getReflectionClass($class);
+            $defaultAlias = 1 === \count($interfaces) ? $interfaces[0] : null;
+            foreach ($r->getAttributes(AsAlias::class) as $attr) {
+                /** @var AsAlias $attribute */
+                $attribute = $attr->newInstance();
+                $alias = $attribute->id ?? $defaultAlias;
+                $public = $attribute->public;
+                if (null === $alias) {
+                    throw new LogicException(\sprintf('Alias cannot be automatically determined for class "%s". If you have used the #[AsAlias] attribute with a class implementing multiple interfaces, add the interface you want to alias to the first parameter of #[AsAlias].', $class));
                 }
-                $r = $this->container->getReflectionClass($class);
-                $defaultAlias = 1 === \count($interfaces) ? $interfaces[0] : null;
-                foreach ($r->getAttributes(AsAlias::class) as $attr) {
-                    /** @var AsAlias $attribute */
-                    $attribute = $attr->newInstance();
-                    $alias = $attribute->id ?? $defaultAlias;
-                    $public = $attribute->public;
-                    if (null === $alias) {
-                        throw new LogicException(\sprintf('Alias cannot be automatically determined for class "%s". If you have used the #[AsAlias] attribute with a class implementing multiple interfaces, add the interface you want to alias to the first parameter of #[AsAlias].', $class));
-                    }
+
+                if (!$attribute->when || \in_array($this->env, $attribute->when, true)) {
                     if (isset($this->aliases[$alias])) {
                         throw new LogicException(\sprintf('The "%s" alias has already been defined with the #[AsAlias] attribute in "%s".', $alias, $this->aliases[$alias]));
                     }
+
                     $this->aliases[$alias] = new Alias($class, $public);
                 }
             }
@@ -304,7 +313,7 @@ protected function setDefinition(string $id, Definition $definition): void
         }
     }
 
-    private function findClasses(string $namespace, string $pattern, array $excludePatterns, ?RegisterAutoconfigureAttributesPass $autoconfigureAttributes, ?string $source): array
+    private function findClasses(string $namespace, string $pattern, array $excludePatterns, ?string $source): array
     {
         $parameterBag = $this->container->getParameterBag();
 
@@ -356,13 +365,9 @@ private function findClasses(string $namespace, string $pattern, array $excludeP
                 throw new InvalidArgumentException(\sprintf('Expected to find class "%s" in file "%s" while importing services from resource "%s", but it was not found! Check the namespace prefix used with the resource.', $class, $path, $pattern));
             }
 
-            if ($r->isInstantiable() || $r->isInterface()) {
+            if (!$r->isTrait()) {
                 $classes[$class] = null;
             }
-
-            if ($autoconfigureAttributes && !$r->isInstantiable()) {
-                $autoconfigureAttributes->processClass($this->container, $r);
-            }
         }
 
         // track only for new & removed files
diff --git a/Loader/XmlFileLoader.php b/Loader/XmlFileLoader.php
index f59698066..eed874cd9 100644
--- a/Loader/XmlFileLoader.php
+++ b/Loader/XmlFileLoader.php
@@ -339,7 +339,11 @@ private function parseDefinition(\DOMElement $service, string $file, Definition
         }
 
         foreach ($this->getChildren($service, 'call') as $call) {
-            $definition->addMethodCall($call->getAttribute('method'), $this->getArgumentsAsPhp($call, 'argument', $file), XmlUtils::phpize($call->getAttribute('returns-clone')));
+            $definition->addMethodCall(
+                $call->getAttribute('method'),
+                $this->getArgumentsAsPhp($call, 'argument', $file),
+                XmlUtils::phpize($call->getAttribute('returns-clone')) ?: false
+            );
         }
 
         $tags = $this->getChildren($service, 'tag');
diff --git a/Loader/YamlFileLoader.php b/Loader/YamlFileLoader.php
index a4a93f63a..c3b1bf255 100644
--- a/Loader/YamlFileLoader.php
+++ b/Loader/YamlFileLoader.php
@@ -923,6 +923,11 @@ private function resolveServices(mixed $value, string $file, bool $isParameter =
 
             return new Expression(substr($value, 2));
         } elseif (\is_string($value) && str_starts_with($value, '@')) {
+            if (str_starts_with($value, '@>')) {
+                $argument = $this->resolveServices(substr_replace($value, '', 1, 1), $file, $isParameter);
+
+                return new ServiceClosureArgument($argument);
+            }
             if (str_starts_with($value, '@@')) {
                 $value = substr($value, 1);
                 $invalidBehavior = null;
diff --git a/Tests/Argument/LazyClosureTest.php b/Tests/Argument/LazyClosureTest.php
index 9652a86fd..e1b5c2a90 100644
--- a/Tests/Argument/LazyClosureTest.php
+++ b/Tests/Argument/LazyClosureTest.php
@@ -11,7 +11,6 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Argument;
 
-use InvalidArgumentException;
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Argument\LazyClosure;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
@@ -23,7 +22,7 @@ public function testMagicGetThrows()
     {
         $closure = new LazyClosure(fn () => null);
 
-        $this->expectException(InvalidArgumentException::class);
+        $this->expectException(\InvalidArgumentException::class);
         $this->expectExceptionMessage('Cannot read property "foo" from a lazy closure.');
 
         $closure->foo;
@@ -34,7 +33,7 @@ public function testThrowsWhenNotUsingInterface()
         $this->expectException(\RuntimeException::class);
         $this->expectExceptionMessage('Cannot create adapter for service "foo" because "Symfony\Component\DependencyInjection\Tests\Argument\LazyClosureTest" is not an interface.');
 
-        LazyClosure::getCode('foo', [new \stdClass(), 'bar'], LazyClosureTest::class, new ContainerBuilder(), 'foo');
+        LazyClosure::getCode('foo', [new \stdClass(), 'bar'], self::class, new ContainerBuilder(), 'foo');
     }
 
     public function testThrowsOnNonFunctionalInterface()
@@ -62,5 +61,6 @@ public function foo();
 interface NonFunctionalInterface
 {
     public function foo();
+
     public function bar();
 }
diff --git a/Tests/Compiler/AutowirePassTest.php b/Tests/Compiler/AutowirePassTest.php
index f6aafdec9..114d514ad 100644
--- a/Tests/Compiler/AutowirePassTest.php
+++ b/Tests/Compiler/AutowirePassTest.php
@@ -174,7 +174,7 @@ public function testPrivateConstructorThrowsAutowireException()
             $pass->process($container);
             $this->fail('AutowirePass should have thrown an exception');
         } catch (AutowiringFailedException $e) {
-            $this->assertSame('Invalid service "private_service": constructor of class "Symfony\Component\DependencyInjection\Tests\Compiler\PrivateConstructor" must be public.', (string) $e->getMessage());
+            $this->assertSame('Invalid service "private_service": constructor of class "Symfony\Component\DependencyInjection\Tests\Compiler\PrivateConstructor" must be public. Did you miss configuring a factory or a static constructor? Try using the "#[Autoconfigure(constructor: ...)]" attribute for the latter.', (string) $e->getMessage());
         }
     }
 
diff --git a/Tests/Compiler/DecoratorServicePassTest.php b/Tests/Compiler/DecoratorServicePassTest.php
index 48ed32df6..9858a10e7 100644
--- a/Tests/Compiler/DecoratorServicePassTest.php
+++ b/Tests/Compiler/DecoratorServicePassTest.php
@@ -197,7 +197,7 @@ public function testProcessMovesTagsFromDecoratedDefinitionToDecoratingDefinitio
 
         $this->process($container);
 
-        $this->assertEmpty($container->getDefinition('baz.inner')->getTags());
+        $this->assertSame([], $container->getDefinition('baz.inner')->getTags());
         $this->assertEquals(['bar' => ['attr' => 'baz'], 'foobar' => ['attr' => 'bar'], 'container.decorator' => [['id' => 'foo', 'inner' => 'baz.inner']]], $container->getDefinition('baz')->getTags());
     }
 
@@ -220,7 +220,7 @@ public function testProcessMovesTagsFromDecoratedDefinitionToDecoratingDefinitio
 
         $this->process($container);
 
-        $this->assertEmpty($container->getDefinition('deco1')->getTags());
+        $this->assertSame([], $container->getDefinition('deco1')->getTags());
         $this->assertEquals(['bar' => ['attr' => 'baz'], 'container.decorator' => [['id' => 'foo', 'inner' => 'deco1.inner']]], $container->getDefinition('deco2')->getTags());
     }
 
diff --git a/Tests/Compiler/PassConfigTest.php b/Tests/Compiler/PassConfigTest.php
index 8001c5401..66718b7bb 100644
--- a/Tests/Compiler/PassConfigTest.php
+++ b/Tests/Compiler/PassConfigTest.php
@@ -45,10 +45,10 @@ public function testPassOrderingWithoutPasses()
         $config->setOptimizationPasses([]);
         $config->setRemovingPasses([]);
 
-        $this->assertEmpty($config->getBeforeOptimizationPasses());
-        $this->assertEmpty($config->getAfterRemovingPasses());
-        $this->assertEmpty($config->getBeforeRemovingPasses());
-        $this->assertEmpty($config->getOptimizationPasses());
-        $this->assertEmpty($config->getRemovingPasses());
+        $this->assertSame([], $config->getBeforeOptimizationPasses());
+        $this->assertSame([], $config->getAfterRemovingPasses());
+        $this->assertSame([], $config->getBeforeRemovingPasses());
+        $this->assertSame([], $config->getOptimizationPasses());
+        $this->assertSame([], $config->getRemovingPasses());
     }
 }
diff --git a/Tests/Compiler/PriorityTaggedServiceTraitTest.php b/Tests/Compiler/PriorityTaggedServiceTraitTest.php
index aac1a2e1a..3f767257d 100644
--- a/Tests/Compiler/PriorityTaggedServiceTraitTest.php
+++ b/Tests/Compiler/PriorityTaggedServiceTraitTest.php
@@ -218,6 +218,9 @@ public function testTaggedItemAttributes()
         $container->register('service5', HelloNamedService2::class)
             ->setAutoconfigured(true)
             ->addTag('my_custom_tag');
+        $container->register('service6', MultiTagHelloNamedService::class)
+            ->setAutoconfigured(true)
+            ->addTag('my_custom_tag');
 
         (new ResolveInstanceofConditionalsPass())->process($container);
 
@@ -226,14 +229,33 @@ public function testTaggedItemAttributes()
         $tag = new TaggedIteratorArgument('my_custom_tag', 'foo', 'getFooBar', exclude: ['service4', 'service5']);
         $expected = [
             'service3' => new TypedReference('service3', HelloNamedService2::class),
+            'multi_hello_2' => new TypedReference('service6', MultiTagHelloNamedService::class),
             'hello' => new TypedReference('service2', HelloNamedService::class),
+            'multi_hello_1' => new TypedReference('service6', MultiTagHelloNamedService::class),
             'service1' => new TypedReference('service1', FooTagClass::class),
         ];
+
         $services = $priorityTaggedServiceTraitImplementation->test($tag, $container);
         $this->assertSame(array_keys($expected), array_keys($services));
         $this->assertEquals($expected, $priorityTaggedServiceTraitImplementation->test($tag, $container));
     }
 
+    public function testTaggedItemAttributesRepeatedWithoutNameThrows()
+    {
+        $container = new ContainerBuilder();
+        $container->register('service1', MultiNoNameTagHelloNamedService::class)
+            ->setAutoconfigured(true)
+            ->addTag('my_custom_tag');
+
+        (new ResolveInstanceofConditionalsPass())->process($container);
+        $tag = new TaggedIteratorArgument('my_custom_tag', 'foo', 'getFooBar', exclude: ['service4', 'service5']);
+
+        $this->expectException(InvalidArgumentException::class);
+        $this->expectExceptionMessage('Attribute "Symfony\Component\DependencyInjection\Attribute\AsTaggedItem" on class "Symfony\Component\DependencyInjection\Tests\Compiler\MultiNoNameTagHelloNamedService" cannot have an empty index when repeated.');
+
+        (new PriorityTaggedServiceTraitImplementation())->test($tag, $container);
+    }
+
     public function testResolveIndexedTags()
     {
         $container = new ContainerBuilder();
@@ -283,6 +305,18 @@ class HelloNamedService2
 {
 }
 
+#[AsTaggedItem(index: 'multi_hello_1', priority: 1)]
+#[AsTaggedItem(index: 'multi_hello_2', priority: 2)]
+class MultiTagHelloNamedService
+{
+}
+
+#[AsTaggedItem(priority: 1)]
+#[AsTaggedItem(priority: 2)]
+class MultiNoNameTagHelloNamedService
+{
+}
+
 interface HelloInterface
 {
     public static function getFooBar(): string;
diff --git a/Tests/Compiler/ResolveInstanceofConditionalsPassTest.php b/Tests/Compiler/ResolveInstanceofConditionalsPassTest.php
index 78fc261ee..b4e50d39f 100644
--- a/Tests/Compiler/ResolveInstanceofConditionalsPassTest.php
+++ b/Tests/Compiler/ResolveInstanceofConditionalsPassTest.php
@@ -39,7 +39,7 @@ public function testProcess()
 
         $parent = '.instanceof.'.parent::class.'.0.foo';
         $def = $container->getDefinition('foo');
-        $this->assertEmpty($def->getInstanceofConditionals());
+        $this->assertSame([], $def->getInstanceofConditionals());
         $this->assertInstanceOf(ChildDefinition::class, $def);
         $this->assertTrue($def->isAutowired());
         $this->assertSame($parent, $def->getParent());
@@ -266,10 +266,10 @@ public function testMergeReset()
 
         $abstract = $container->getDefinition('.abstract.instanceof.bar');
 
-        $this->assertEmpty($abstract->getArguments());
-        $this->assertEmpty($abstract->getMethodCalls());
+        $this->assertSame([], $abstract->getArguments());
+        $this->assertSame([], $abstract->getMethodCalls());
         $this->assertNull($abstract->getDecoratedService());
-        $this->assertEmpty($abstract->getTags());
+        $this->assertSame([], $abstract->getTags());
         $this->assertTrue($abstract->isAbstract());
     }
 
@@ -376,6 +376,21 @@ public function testDecoratorsKeepBehaviorDescribingTags()
         ], $container->getDefinition('decorator')->getTags());
         $this->assertFalse($container->hasParameter('container.behavior_describing_tags'));
     }
+
+    public function testSyntheticService()
+    {
+        $container = new ContainerBuilder();
+        $container->register('kernel', \stdClass::class)
+            ->setInstanceofConditionals([
+                \stdClass::class => (new ChildDefinition(''))
+                    ->addTag('container.excluded'),
+            ])
+            ->setSynthetic(true);
+
+        (new ResolveInstanceofConditionalsPass())->process($container);
+
+        $this->assertSame([], $container->getDefinition('kernel')->getTags());
+    }
 }
 
 class DecoratorWithBehavior implements ResetInterface, ResourceCheckerInterface, ServiceSubscriberInterface
diff --git a/Tests/ContainerBuilderTest.php b/Tests/ContainerBuilderTest.php
index 73be8aaed..06a20b4a4 100644
--- a/Tests/ContainerBuilderTest.php
+++ b/Tests/ContainerBuilderTest.php
@@ -25,6 +25,7 @@
 use Symfony\Component\DependencyInjection\Argument\IteratorArgument;
 use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
 use Symfony\Component\DependencyInjection\Argument\ServiceClosureArgument;
+use Symfony\Component\DependencyInjection\Attribute\AsTaggedItem;
 use Symfony\Component\DependencyInjection\ChildDefinition;
 use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
 use Symfony\Component\DependencyInjection\Compiler\PassConfig;
@@ -34,6 +35,7 @@
 use Symfony\Component\DependencyInjection\Exception\BadMethodCallException;
 use Symfony\Component\DependencyInjection\Exception\EnvNotFoundException;
 use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\Exception\LogicException;
 use Symfony\Component\DependencyInjection\Exception\ParameterCircularReferenceException;
 use Symfony\Component\DependencyInjection\Exception\ParameterNotFoundException;
 use Symfony\Component\DependencyInjection\Exception\RuntimeException;
@@ -843,6 +845,36 @@ public function testMergeThrowsExceptionForDuplicateAutomaticInstanceofDefinitio
         $container->merge($config);
     }
 
+    public function testMergeAttributeAutoconfiguration()
+    {
+        $container = new ContainerBuilder();
+        $container->registerAttributeForAutoconfiguration(AsTaggedItem::class, $c1 = static function (Definition $definition) {});
+        $config = new ContainerBuilder();
+        $config->registerAttributeForAutoconfiguration(AsTaggedItem::class, $c2 = function (Definition $definition) {});
+
+        $container->merge($config);
+        $this->assertSame([AsTaggedItem::class => [$c1, $c2]], $container->getAttributeAutoconfigurators());
+    }
+
+    /**
+     * @group legacy
+     */
+    public function testGetAutoconfiguredAttributes()
+    {
+        $container = new ContainerBuilder();
+        $container->registerAttributeForAutoconfiguration(AsTaggedItem::class, $c = static function () {});
+
+        $this->expectUserDeprecationMessage('Since symfony/dependency-injection 7.3: The "Symfony\Component\DependencyInjection\ContainerBuilder::getAutoconfiguredAttributes()" method is deprecated, use "getAttributeAutoconfigurators()" instead.');
+        $configurators = $container->getAutoconfiguredAttributes();
+        $this->assertSame($c, $configurators[AsTaggedItem::class]);
+
+        // Method call fails with more than one configurator for a given attribute
+        $container->registerAttributeForAutoconfiguration(AsTaggedItem::class, $c = static function () {});
+
+        $this->expectException(LogicException::class);
+        $container->getAutoconfiguredAttributes();
+    }
+
     public function testResolveEnvValues()
     {
         $_ENV['DUMMY_ENV_VAR'] = 'du%%y';
@@ -1076,20 +1108,18 @@ public function testMergeLogicException()
         $container->merge(new ContainerBuilder());
     }
 
-    public function testfindTaggedServiceIds()
+    public function testFindTaggedServiceIds()
     {
         $builder = new ContainerBuilder();
-        $builder
-            ->register('foo', 'Bar\FooClass')
+        $builder->register('foo', 'Bar\FooClass')
+            ->setAbstract(true)
             ->addTag('foo', ['foo' => 'foo'])
             ->addTag('bar', ['bar' => 'bar'])
-            ->addTag('foo', ['foofoo' => 'foofoo'])
-        ;
-        $builder
-            ->register('bar', 'Bar\FooClass')
+            ->addTag('foo', ['foofoo' => 'foofoo']);
+        $builder->register('bar', 'Bar\FooClass')
             ->addTag('foo')
-            ->addTag('container.excluded')
-        ;
+            ->addTag('container.excluded');
+
         $this->assertEquals([
             'foo' => [
                 ['foo' => 'foo'],
@@ -1099,6 +1129,45 @@ public function testfindTaggedServiceIds()
         $this->assertEquals([], $builder->findTaggedServiceIds('foobar'), '->findTaggedServiceIds() returns an empty array if there is annotated services');
     }
 
+    public function testFindTaggedServiceIdsThrowsWhenAbstract()
+    {
+        $builder = new ContainerBuilder();
+        $builder->register('foo', 'Bar\FooClass')
+            ->setAbstract(true)
+            ->addTag('foo', ['foo' => 'foo']);
+
+        $this->expectException(InvalidArgumentException::class);
+        $this->expectExceptionMessage('The service "foo" tagged "foo" must not be abstract.');
+        $builder->findTaggedServiceIds('foo', true);
+    }
+
+    public function testFindTaggedResourceIds()
+    {
+        $builder = new ContainerBuilder();
+        $builder->register('myservice', 'Bar\FooClass')
+            ->addTag('foo', ['foo' => 'foo'])
+            ->addTag('bar', ['bar' => 'bar'])
+            ->addTag('foo', ['foofoo' => 'foofoo'])
+            ->addResourceTag('container.excluded');
+
+        $expected = ['myservice' => [['foo' => 'foo'], ['foofoo' => 'foofoo']]];
+        $this->assertSame($expected, $builder->findTaggedResourceIds('foo'));
+        $this->assertSame([], $builder->findTaggedResourceIds('foofoo'));
+    }
+
+    public function testFindTaggedResourceIdsThrowsWhenNotExcluded()
+    {
+        $builder = new ContainerBuilder();
+        $builder->register('myservice', 'Bar\FooClass')
+            ->addTag('foo', ['foo' => 'foo'])
+            ->addTag('bar', ['bar' => 'bar'])
+            ->addTag('foo', ['foofoo' => 'foofoo']);
+
+        $this->expectException(InvalidArgumentException::class);
+        $this->expectExceptionMessage('The resource "myservice" tagged "foo" is missing the "container.excluded" tag.');
+        $builder->findTaggedResourceIds('foo');
+    }
+
     public function testFindUnusedTags()
     {
         $builder = new ContainerBuilder();
@@ -1127,7 +1196,7 @@ public function testAddObjectResource()
         $container->setResourceTracking(false);
         $container->addObjectResource(new \BarClass());
 
-        $this->assertEmpty($container->getResources(), 'No resources get registered without resource tracking');
+        $this->assertSame([], $container->getResources(), 'No resources get registered without resource tracking');
 
         $container->setResourceTracking(true);
         $container->addObjectResource(new \BarClass());
@@ -1136,7 +1205,7 @@ public function testAddObjectResource()
 
         $this->assertCount(1, $resources);
 
-        /* @var FileResource $resource */
+        /** @var FileResource $resource */
         $resource = end($resources);
 
         $this->assertInstanceOf(FileResource::class, $resource);
@@ -1150,7 +1219,7 @@ public function testGetReflectionClass()
         $container->setResourceTracking(false);
         $r1 = $container->getReflectionClass('BarClass');
 
-        $this->assertEmpty($container->getResources(), 'No resources get registered without resource tracking');
+        $this->assertSame([], $container->getResources(), 'No resources get registered without resource tracking');
 
         $container->setResourceTracking(true);
         $r2 = $container->getReflectionClass('BarClass');
@@ -1190,7 +1259,7 @@ public function testCompilesClassDefinitionsOfLazyServices()
     {
         $container = new ContainerBuilder();
 
-        $this->assertEmpty($container->getResources(), 'No resources get registered without resource tracking');
+        $this->assertSame([], $container->getResources(), 'No resources get registered without resource tracking');
 
         $container->register('foo', 'BarClass')->setPublic(true);
         $container->getDefinition('foo')->setLazy(true);
@@ -1349,7 +1418,7 @@ public function testExtensionConfig()
         $container = new ContainerBuilder();
 
         $configs = $container->getExtensionConfig('foo');
-        $this->assertEmpty($configs);
+        $this->assertSame([], $configs);
 
         $first = ['foo' => 'bar'];
         $container->prependExtensionConfig('foo', $first);
@@ -1896,8 +1965,12 @@ public function testLazyWither()
         $container->compile();
 
         $wither = $container->get('wither');
+        if (\PHP_VERSION_ID >= 80400) {
+            $this->assertTrue((new \ReflectionClass($wither))->isUninitializedLazyObject($wither));
+        } else {
+            $this->assertTrue($wither->resetLazyObject());
+        }
         $this->assertInstanceOf(Foo::class, $wither->foo);
-        $this->assertTrue($wither->resetLazyObject());
         $this->assertInstanceOf(Wither::class, $wither->withFoo1($wither->foo));
     }
 
diff --git a/Tests/DefinitionTest.php b/Tests/DefinitionTest.php
index 3a7c3a980..459e566d2 100644
--- a/Tests/DefinitionTest.php
+++ b/Tests/DefinitionTest.php
@@ -258,6 +258,16 @@ public function testTags()
         ], $def->getTags(), '->getTags() returns all tags');
     }
 
+    public function testAddResourceTag()
+    {
+        $def = new Definition('stdClass');
+        $def->addResourceTag('foo', ['bar' => true]);
+
+        $this->assertSame([['bar' => true]], $def->getTag('foo'));
+        $this->assertTrue($def->isAbstract());
+        $this->assertSame([['source' => 'by tag "foo"']], $def->getTag('container.excluded'));
+    }
+
     public function testSetArgument()
     {
         $def = new Definition('stdClass');
diff --git a/Tests/Dumper/PhpDumperTest.php b/Tests/Dumper/PhpDumperTest.php
index 95abb7087..a117a69a0 100644
--- a/Tests/Dumper/PhpDumperTest.php
+++ b/Tests/Dumper/PhpDumperTest.php
@@ -340,7 +340,7 @@ public function testDumpAsFilesWithLazyFactoriesInlined()
         if ('\\' === \DIRECTORY_SEPARATOR) {
             $dump = str_replace("'.\\DIRECTORY_SEPARATOR.'", '/', $dump);
         }
-        $this->assertStringMatchesFormatFile(self::$fixturesPath.'/php/services9_lazy_inlined_factories.txt', $dump);
+        $this->assertStringMatchesFormatFile(self::$fixturesPath.'/php/'.(\PHP_VERSION_ID < 80400 ? 'legacy_' : '').'services9_lazy_inlined_factories.txt', $dump);
     }
 
     public function testServicesWithAnonymousFactories()
@@ -794,7 +794,7 @@ public function testNonSharedLazy()
             'inline_class_loader' => false,
         ]);
         $this->assertStringEqualsFile(
-            self::$fixturesPath.'/php/services_non_shared_lazy_public.php',
+            self::$fixturesPath.'/php/'.(\PHP_VERSION_ID < 80400 ? 'legacy_' : '').'services_non_shared_lazy_public.php',
             '\\' === \DIRECTORY_SEPARATOR ? str_replace("'.\\DIRECTORY_SEPARATOR.'", '/', $dump) : $dump
         );
         eval('?>'.$dump);
@@ -802,10 +802,18 @@ public function testNonSharedLazy()
         $container = new \Symfony_DI_PhpDumper_Service_Non_Shared_Lazy();
 
         $foo1 = $container->get('foo');
-        $this->assertTrue($foo1->resetLazyObject());
+        if (\PHP_VERSION_ID >= 80400) {
+            $this->assertTrue((new \ReflectionClass($foo1))->isUninitializedLazyObject($foo1));
+        } else {
+            $this->assertTrue($foo1->resetLazyObject());
+        }
 
         $foo2 = $container->get('foo');
-        $this->assertTrue($foo2->resetLazyObject());
+        if (\PHP_VERSION_ID >= 80400) {
+            $this->assertTrue((new \ReflectionClass($foo2))->isUninitializedLazyObject($foo2));
+        } else {
+            $this->assertTrue($foo2->resetLazyObject());
+        }
 
         $this->assertNotSame($foo1, $foo2);
     }
@@ -832,7 +840,7 @@ public function testNonSharedLazyAsFiles()
 
         $stringDump = print_r($dumps, true);
         $this->assertStringMatchesFormatFile(
-            self::$fixturesPath.'/php/services_non_shared_lazy_as_files.txt',
+            self::$fixturesPath.'/php/'.(\PHP_VERSION_ID < 80400 ? 'legacy_' : '').'services_non_shared_lazy_as_files.txt',
             '\\' === \DIRECTORY_SEPARATOR ? str_replace("'.\\DIRECTORY_SEPARATOR.'", '/', $stringDump) : $stringDump
         );
 
@@ -844,10 +852,18 @@ public function testNonSharedLazyAsFiles()
         $container = eval('?>'.$lastDump);
 
         $foo1 = $container->get('non_shared_foo');
-        $this->assertTrue($foo1->resetLazyObject());
+        if (\PHP_VERSION_ID >= 80400) {
+            $this->assertTrue((new \ReflectionClass($foo1))->isUninitializedLazyObject($foo1));
+        } else {
+            $this->assertTrue($foo1->resetLazyObject());
+        }
 
         $foo2 = $container->get('non_shared_foo');
-        $this->assertTrue($foo2->resetLazyObject());
+        if (\PHP_VERSION_ID >= 80400) {
+            $this->assertTrue((new \ReflectionClass($foo2))->isUninitializedLazyObject($foo2));
+        } else {
+            $this->assertTrue($foo2->resetLazyObject());
+        }
 
         $this->assertNotSame($foo1, $foo2);
     }
@@ -869,7 +885,7 @@ public function testNonSharedLazyDefinitionReferences(bool $asGhostObject)
             $dumper->setProxyDumper(new \DummyProxyDumper());
         }
 
-        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_non_shared_lazy'.($asGhostObject ? '_ghost' : '').'.php', $dumper->dump());
+        $this->assertStringEqualsFile(self::$fixturesPath.'/php/'.(\PHP_VERSION_ID < 80400 ? 'legacy_' : '').'services_non_shared_lazy'.($asGhostObject ? '_ghost' : '').'.php', $dumper->dump());
     }
 
     public function testNonSharedDuplicates()
@@ -942,7 +958,7 @@ public function testDedupLazyProxy()
 
         $dumper = new PhpDumper($container);
 
-        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_dedup_lazy.php', $dumper->dump());
+        $this->assertStringEqualsFile(self::$fixturesPath.'/php/'.(\PHP_VERSION_ID < 80400 ? 'legacy_' : '').'services_dedup_lazy.php', $dumper->dump());
     }
 
     public function testLazyArgumentProvideGenerator()
@@ -986,7 +1002,7 @@ public function testLazyArgumentProvideGenerator()
             }
         }
 
-        $this->assertEmpty(iterator_to_array($lazyContext->lazyEmptyValues));
+        $this->assertSame([], iterator_to_array($lazyContext->lazyEmptyValues));
     }
 
     public function testNormalizedId()
@@ -1607,14 +1623,18 @@ public function testLazyWither()
         $container->compile();
         $dumper = new PhpDumper($container);
         $dump = $dumper->dump(['class' => 'Symfony_DI_PhpDumper_Service_Wither_Lazy']);
-        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_wither_lazy.php', $dump);
+        $this->assertStringEqualsFile(self::$fixturesPath.'/php/'.(\PHP_VERSION_ID < 80400 ? 'legacy_' : '').'services_wither_lazy.php', $dump);
         eval('?>'.$dump);
 
         $container = new \Symfony_DI_PhpDumper_Service_Wither_Lazy();
 
         $wither = $container->get('wither');
+        if (\PHP_VERSION_ID >= 80400) {
+            $this->assertTrue((new \ReflectionClass($wither))->isUninitializedLazyObject($wither));
+        } else {
+            $this->assertTrue($wither->resetLazyObject());
+        }
         $this->assertInstanceOf(Foo::class, $wither->foo);
-        $this->assertTrue($wither->resetLazyObject());
     }
 
     public function testLazyWitherNonShared()
@@ -1632,18 +1652,26 @@ public function testLazyWitherNonShared()
         $container->compile();
         $dumper = new PhpDumper($container);
         $dump = $dumper->dump(['class' => 'Symfony_DI_PhpDumper_Service_Wither_Lazy_Non_Shared']);
-        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_wither_lazy_non_shared.php', $dump);
+        $this->assertStringEqualsFile(self::$fixturesPath.'/php/'.(\PHP_VERSION_ID < 80400 ? 'legacy_' : '').'services_wither_lazy_non_shared.php', $dump);
         eval('?>'.$dump);
 
         $container = new \Symfony_DI_PhpDumper_Service_Wither_Lazy_Non_Shared();
 
         $wither1 = $container->get('wither');
+        if (\PHP_VERSION_ID >= 80400) {
+            $this->assertTrue((new \ReflectionClass($wither1))->isUninitializedLazyObject($wither1));
+        } else {
+            $this->assertTrue($wither1->resetLazyObject());
+        }
         $this->assertInstanceOf(Foo::class, $wither1->foo);
-        $this->assertTrue($wither1->resetLazyObject());
 
         $wither2 = $container->get('wither');
+        if (\PHP_VERSION_ID >= 80400) {
+            $this->assertTrue((new \ReflectionClass($wither2))->isUninitializedLazyObject($wither2));
+        } else {
+            $this->assertTrue($wither2->resetLazyObject());
+        }
         $this->assertInstanceOf(Foo::class, $wither2->foo);
-        $this->assertTrue($wither2->resetLazyObject());
 
         $this->assertNotSame($wither1, $wither2);
     }
@@ -1971,15 +1999,21 @@ public function testLazyAutowireAttribute()
         $container->compile();
         $dumper = new PhpDumper($container);
 
-        $this->assertStringEqualsFile(self::$fixturesPath.'/php/lazy_autowire_attribute.php', $dumper->dump(['class' => 'Symfony_DI_PhpDumper_Test_Lazy_Autowire_Attribute']));
+        $this->assertStringEqualsFile(self::$fixturesPath.'/php/'.(\PHP_VERSION_ID < 80400 ? 'legacy_' : '').'lazy_autowire_attribute.php', $dumper->dump(['class' => 'Symfony_DI_PhpDumper_Test_Lazy_Autowire_Attribute']));
 
-        require self::$fixturesPath.'/php/lazy_autowire_attribute.php';
+        require self::$fixturesPath.'/php/'.(\PHP_VERSION_ID < 80400 ? 'legacy_' : '').'lazy_autowire_attribute.php';
 
         $container = new \Symfony_DI_PhpDumper_Test_Lazy_Autowire_Attribute();
 
         $this->assertInstanceOf(Foo::class, $container->get('bar')->foo);
-        $this->assertInstanceOf(LazyObjectInterface::class, $container->get('bar')->foo);
-        $this->assertSame($container->get('foo'), $container->get('bar')->foo->initializeLazyObject());
+        if (\PHP_VERSION_ID >= 80400) {
+            $r = new \ReflectionClass(Foo::class);
+            $this->assertTrue($r->isUninitializedLazyObject($container->get('bar')->foo));
+            $this->assertSame($container->get('foo'), $r->initializeLazyObject($container->get('bar')->foo));
+        } else {
+            $this->assertInstanceOf(LazyObjectInterface::class, $container->get('bar')->foo);
+            $this->assertSame($container->get('foo'), $container->get('bar')->foo->initializeLazyObject());
+        }
     }
 
     public function testLazyAutowireAttributeWithIntersection()
@@ -2002,7 +2036,11 @@ public function testLazyAutowireAttributeWithIntersection()
 
         $dumper = new PhpDumper($container);
 
-        $this->assertStringEqualsFile(self::$fixturesPath.'/php/lazy_autowire_attribute_with_intersection.php', $dumper->dump());
+        if (\PHP_VERSION_ID >= 80400) {
+            $this->assertStringEqualsFile(self::$fixturesPath.'/php/lazy_autowire_attribute_with_intersection.php', $dumper->dump());
+        } else {
+            $this->assertStringEqualsFile(self::$fixturesPath.'/php/legacy_lazy_autowire_attribute_with_intersection.php', $dumper->dump());
+        }
     }
 
     public function testCallableAdapterConsumer()
diff --git a/Tests/Fixtures/AbstractSayClass.php b/Tests/Fixtures/AbstractSayClass.php
new file mode 100644
index 000000000..f59aa1bf4
--- /dev/null
+++ b/Tests/Fixtures/AbstractSayClass.php
@@ -0,0 +1,17 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\DependencyInjection\Tests\Fixtures;
+
+abstract class AbstractSayClass
+{
+    abstract public function say(): string;
+}
diff --git a/Tests/Fixtures/Prototype/StaticConstructor/PrototypeStaticConstructor.php b/Tests/Fixtures/Prototype/StaticConstructor/PrototypeStaticConstructor.php
index 87de94cb1..6ac5316a3 100644
--- a/Tests/Fixtures/Prototype/StaticConstructor/PrototypeStaticConstructor.php
+++ b/Tests/Fixtures/Prototype/StaticConstructor/PrototypeStaticConstructor.php
@@ -4,6 +4,10 @@
 
 class PrototypeStaticConstructor implements PrototypeStaticConstructorInterface
 {
+    private function __construct()
+    {
+    }
+
     public static function create(): static
     {
         return new self();
diff --git a/Tests/Fixtures/PrototypeAsAlias/WithAsAliasBothEnv.php b/Tests/Fixtures/PrototypeAsAlias/WithAsAliasBothEnv.php
new file mode 100644
index 000000000..252842be3
--- /dev/null
+++ b/Tests/Fixtures/PrototypeAsAlias/WithAsAliasBothEnv.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace Symfony\Component\DependencyInjection\Tests\Fixtures\PrototypeAsAlias;
+
+use Symfony\Component\DependencyInjection\Attribute\AsAlias;
+
+#[AsAlias(id: AliasBarInterface::class, when: ['dev', 'prod'])]
+class WithAsAliasBothEnv
+{
+}
diff --git a/Tests/Fixtures/PrototypeAsAlias/WithAsAliasDevEnv.php b/Tests/Fixtures/PrototypeAsAlias/WithAsAliasDevEnv.php
new file mode 100644
index 000000000..b03a81dc2
--- /dev/null
+++ b/Tests/Fixtures/PrototypeAsAlias/WithAsAliasDevEnv.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace Symfony\Component\DependencyInjection\Tests\Fixtures\PrototypeAsAlias;
+
+use Symfony\Component\DependencyInjection\Attribute\AsAlias;
+
+#[AsAlias(id: AliasFooInterface::class, when: 'dev')]
+class WithAsAliasDevEnv
+{
+}
diff --git a/Tests/Fixtures/PrototypeAsAlias/WithAsAliasProdEnv.php b/Tests/Fixtures/PrototypeAsAlias/WithAsAliasProdEnv.php
new file mode 100644
index 000000000..de668c8b0
--- /dev/null
+++ b/Tests/Fixtures/PrototypeAsAlias/WithAsAliasProdEnv.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace Symfony\Component\DependencyInjection\Tests\Fixtures\PrototypeAsAlias;
+
+use Symfony\Component\DependencyInjection\Attribute\AsAlias;
+
+#[AsAlias(id: AliasFooInterface::class, when: 'prod')]
+class WithAsAliasProdEnv
+{
+}
diff --git a/Tests/Fixtures/includes/autowiring_classes.php b/Tests/Fixtures/includes/autowiring_classes.php
index 98cbbec90..9e07d0283 100644
--- a/Tests/Fixtures/includes/autowiring_classes.php
+++ b/Tests/Fixtures/includes/autowiring_classes.php
@@ -14,6 +14,7 @@
 class Foo
 {
     public static int $counter = 0;
+    public int $foo = 0;
 
     #[Required]
     public function cloneFoo(?\stdClass $bar = null): static
diff --git a/Tests/Fixtures/includes/foo_lazy.php b/Tests/Fixtures/includes/foo_lazy.php
index 1caad4b20..e150e09e4 100644
--- a/Tests/Fixtures/includes/foo_lazy.php
+++ b/Tests/Fixtures/includes/foo_lazy.php
@@ -4,4 +4,5 @@
 
 class FooLazyClass
 {
+    public int $foo = 0;
 }
diff --git a/Tests/Fixtures/php/lazy_autowire_attribute.php b/Tests/Fixtures/php/lazy_autowire_attribute.php
index 4f596a2b9..97388c0ef 100644
--- a/Tests/Fixtures/php/lazy_autowire_attribute.php
+++ b/Tests/Fixtures/php/lazy_autowire_attribute.php
@@ -77,21 +77,9 @@ protected static function getFooService($container)
     protected static function getFoo2Service($container, $lazyLoad = true)
     {
         if (true === $lazyLoad) {
-            return $container->privates['.lazy.Symfony\\Component\\DependencyInjection\\Tests\\Compiler\\Foo'] = $container->createProxy('FooProxyCd8d23a', static fn () => \FooProxyCd8d23a::createLazyProxy(static fn () => self::getFoo2Service($container, false)));
+            return $container->privates['.lazy.Symfony\\Component\\DependencyInjection\\Tests\\Compiler\\Foo'] = new \ReflectionClass('Symfony\Component\DependencyInjection\Tests\Compiler\Foo')->newLazyProxy(static fn () => self::getFoo2Service($container, false));
         }
 
         return ($container->services['foo'] ??= new \Symfony\Component\DependencyInjection\Tests\Compiler\Foo());
     }
 }
-
-class FooProxyCd8d23a extends \Symfony\Component\DependencyInjection\Tests\Compiler\Foo implements \Symfony\Component\VarExporter\LazyObjectInterface
-{
-    use \Symfony\Component\VarExporter\LazyProxyTrait;
-
-    private const LAZY_OBJECT_PROPERTY_SCOPES = [];
-}
-
-// Help opcache.preload discover always-needed symbols
-class_exists(\Symfony\Component\VarExporter\Internal\Hydrator::class);
-class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectRegistry::class);
-class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectState::class);
diff --git a/Tests/Fixtures/php/lazy_autowire_attribute_with_intersection.php b/Tests/Fixtures/php/lazy_autowire_attribute_with_intersection.php
index fcf66ad12..15cab6e1d 100644
--- a/Tests/Fixtures/php/lazy_autowire_attribute_with_intersection.php
+++ b/Tests/Fixtures/php/lazy_autowire_attribute_with_intersection.php
@@ -74,21 +74,16 @@ protected static function get_Lazy_Foo_QFdMZVKService($container, $lazyLoad = tr
 
 class objectProxy1fd6daa implements \Symfony\Component\DependencyInjection\Tests\Compiler\AInterface, \Symfony\Component\DependencyInjection\Tests\Compiler\IInterface, \Symfony\Component\VarExporter\LazyObjectInterface
 {
-    use \Symfony\Component\VarExporter\LazyProxyTrait;
+    use \Symfony\Component\VarExporter\Internal\LazyDecoratorTrait;
 
     private const LAZY_OBJECT_PROPERTY_SCOPES = [];
 
     public function initializeLazyObject(): \Symfony\Component\DependencyInjection\Tests\Compiler\AInterface&\Symfony\Component\DependencyInjection\Tests\Compiler\IInterface
     {
-        if ($state = $this->lazyObjectState ?? null) {
-            return $state->realInstance ??= ($state->initializer)();
-        }
-
-        return $this;
+        return $this->lazyObjectState->realInstance;
     }
 }
 
 // Help opcache.preload discover always-needed symbols
 class_exists(\Symfony\Component\VarExporter\Internal\Hydrator::class);
 class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectRegistry::class);
-class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectState::class);
diff --git a/Tests/Fixtures/php/legacy_lazy_autowire_attribute.php b/Tests/Fixtures/php/legacy_lazy_autowire_attribute.php
new file mode 100644
index 000000000..6cf1c86a5
--- /dev/null
+++ b/Tests/Fixtures/php/legacy_lazy_autowire_attribute.php
@@ -0,0 +1,99 @@
+<?php
+
+use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Container;
+use Symfony\Component\DependencyInjection\Exception\LogicException;
+use Symfony\Component\DependencyInjection\Exception\ParameterNotFoundException;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
+use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
+
+/**
+ * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
+ */
+class Symfony_DI_PhpDumper_Test_Lazy_Autowire_Attribute extends Container
+{
+    protected $parameters = [];
+
+    public function __construct()
+    {
+        $this->services = $this->privates = [];
+        $this->methodMap = [
+            'bar' => 'getBarService',
+            'foo' => 'getFooService',
+        ];
+
+        $this->aliases = [];
+    }
+
+    public function compile(): void
+    {
+        throw new LogicException('You cannot compile a dumped container that was already compiled.');
+    }
+
+    public function isCompiled(): bool
+    {
+        return true;
+    }
+
+    public function getRemovedIds(): array
+    {
+        return [
+            'Symfony\\Component\\DependencyInjection\\Tests\\Compiler\\Foo' => true,
+        ];
+    }
+
+    protected function createProxy($class, \Closure $factory)
+    {
+        return $factory();
+    }
+
+    /**
+     * Gets the public 'bar' shared autowired service.
+     *
+     * @return \Symfony\Component\DependencyInjection\Tests\Dumper\LazyServiceConsumer
+     */
+    protected static function getBarService($container)
+    {
+        return $container->services['bar'] = new \Symfony\Component\DependencyInjection\Tests\Dumper\LazyServiceConsumer(($container->privates['.lazy.Symfony\\Component\\DependencyInjection\\Tests\\Compiler\\Foo'] ?? self::getFoo2Service($container)));
+    }
+
+    /**
+     * Gets the public 'foo' shared service.
+     *
+     * @return \Symfony\Component\DependencyInjection\Tests\Compiler\Foo
+     */
+    protected static function getFooService($container)
+    {
+        return $container->services['foo'] = new \Symfony\Component\DependencyInjection\Tests\Compiler\Foo();
+    }
+
+    /**
+     * Gets the private '.lazy.Symfony\Component\DependencyInjection\Tests\Compiler\Foo' shared service.
+     *
+     * @return \Symfony\Component\DependencyInjection\Tests\Compiler\Foo
+     */
+    protected static function getFoo2Service($container, $lazyLoad = true)
+    {
+        if (true === $lazyLoad) {
+            return $container->privates['.lazy.Symfony\\Component\\DependencyInjection\\Tests\\Compiler\\Foo'] = $container->createProxy('FooProxyCd8d23a', static fn () => \FooProxyCd8d23a::createLazyProxy(static fn () => self::getFoo2Service($container, false)));
+        }
+
+        return ($container->services['foo'] ??= new \Symfony\Component\DependencyInjection\Tests\Compiler\Foo());
+    }
+}
+
+class FooProxyCd8d23a extends \Symfony\Component\DependencyInjection\Tests\Compiler\Foo implements \Symfony\Component\VarExporter\LazyObjectInterface
+{
+    use \Symfony\Component\VarExporter\LazyProxyTrait;
+
+    private const LAZY_OBJECT_PROPERTY_SCOPES = [
+        'foo' => [parent::class, 'foo', null, 4],
+    ];
+}
+
+// Help opcache.preload discover always-needed symbols
+class_exists(\Symfony\Component\VarExporter\Internal\Hydrator::class);
+class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectRegistry::class);
+class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectState::class);
diff --git a/Tests/Fixtures/php/legacy_lazy_autowire_attribute_with_intersection.php b/Tests/Fixtures/php/legacy_lazy_autowire_attribute_with_intersection.php
new file mode 100644
index 000000000..fcf66ad12
--- /dev/null
+++ b/Tests/Fixtures/php/legacy_lazy_autowire_attribute_with_intersection.php
@@ -0,0 +1,94 @@
+<?php
+
+use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Container;
+use Symfony\Component\DependencyInjection\Exception\LogicException;
+use Symfony\Component\DependencyInjection\Exception\ParameterNotFoundException;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
+use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
+
+/**
+ * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
+ */
+class ProjectServiceContainer extends Container
+{
+    protected $parameters = [];
+
+    public function __construct()
+    {
+        $this->services = $this->privates = [];
+        $this->methodMap = [
+            'foo' => 'getFooService',
+        ];
+
+        $this->aliases = [];
+    }
+
+    public function compile(): void
+    {
+        throw new LogicException('You cannot compile a dumped container that was already compiled.');
+    }
+
+    public function isCompiled(): bool
+    {
+        return true;
+    }
+
+    protected function createProxy($class, \Closure $factory)
+    {
+        return $factory();
+    }
+
+    /**
+     * Gets the public 'foo' shared autowired service.
+     *
+     * @return \Symfony\Component\DependencyInjection\Tests\Compiler\AAndIInterfaceConsumer
+     */
+    protected static function getFooService($container)
+    {
+        $a = ($container->privates['.lazy.foo.qFdMZVK'] ?? self::get_Lazy_Foo_QFdMZVKService($container));
+
+        if (isset($container->services['foo'])) {
+            return $container->services['foo'];
+        }
+
+        return $container->services['foo'] = new \Symfony\Component\DependencyInjection\Tests\Compiler\AAndIInterfaceConsumer($a);
+    }
+
+    /**
+     * Gets the private '.lazy.foo.qFdMZVK' shared service.
+     *
+     * @return \object
+     */
+    protected static function get_Lazy_Foo_QFdMZVKService($container, $lazyLoad = true)
+    {
+        if (true === $lazyLoad) {
+            return $container->privates['.lazy.foo.qFdMZVK'] = $container->createProxy('objectProxy1fd6daa', static fn () => \objectProxy1fd6daa::createLazyProxy(static fn () => self::get_Lazy_Foo_QFdMZVKService($container, false)));
+        }
+
+        return ($container->services['foo'] ?? self::getFooService($container));
+    }
+}
+
+class objectProxy1fd6daa implements \Symfony\Component\DependencyInjection\Tests\Compiler\AInterface, \Symfony\Component\DependencyInjection\Tests\Compiler\IInterface, \Symfony\Component\VarExporter\LazyObjectInterface
+{
+    use \Symfony\Component\VarExporter\LazyProxyTrait;
+
+    private const LAZY_OBJECT_PROPERTY_SCOPES = [];
+
+    public function initializeLazyObject(): \Symfony\Component\DependencyInjection\Tests\Compiler\AInterface&\Symfony\Component\DependencyInjection\Tests\Compiler\IInterface
+    {
+        if ($state = $this->lazyObjectState ?? null) {
+            return $state->realInstance ??= ($state->initializer)();
+        }
+
+        return $this;
+    }
+}
+
+// Help opcache.preload discover always-needed symbols
+class_exists(\Symfony\Component\VarExporter\Internal\Hydrator::class);
+class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectRegistry::class);
+class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectState::class);
diff --git a/Tests/Fixtures/php/legacy_services9_lazy_inlined_factories.txt b/Tests/Fixtures/php/legacy_services9_lazy_inlined_factories.txt
new file mode 100644
index 000000000..f945fdd50
--- /dev/null
+++ b/Tests/Fixtures/php/legacy_services9_lazy_inlined_factories.txt
@@ -0,0 +1,196 @@
+Array
+(
+    [Container%s/proxy-classes.php] => <?php
+
+namespace Container%s;
+
+include_once $container->targetDir.''.'/Fixtures/includes/foo.php';
+
+class FooClassGhost1728205 extends \Bar\FooClass implements \Symfony\Component\VarExporter\LazyObjectInterface
+%A
+
+if (!\class_exists('FooClassGhost1728205', false)) {
+    \class_alias(__NAMESPACE__.'\\FooClassGhost1728205', 'FooClassGhost1728205', false);
+}
+
+    [Container%s/ProjectServiceContainer.php] => <?php
+
+namespace Container%s;
+
+use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Container;
+use Symfony\Component\DependencyInjection\Exception\LogicException;
+use Symfony\Component\DependencyInjection\Exception\ParameterNotFoundException;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
+use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
+
+/**
+ * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
+ */
+class ProjectServiceContainer extends Container
+{
+    protected $targetDir;
+    protected $parameters = [];
+
+    public function __construct(private array $buildParameters = [], protected string $containerDir = __DIR__)
+    {
+        $this->targetDir = \dirname($containerDir);
+        $this->parameters = $this->getDefaultParameters();
+
+        $this->services = $this->privates = [];
+        $this->methodMap = [
+            'lazy_foo' => 'getLazyFooService',
+        ];
+
+        $this->aliases = [];
+
+        $this->privates['service_container'] = static function ($container) {
+            include_once __DIR__.'/proxy-classes.php';
+        };
+    }
+
+    public function compile(): void
+    {
+        throw new LogicException('You cannot compile a dumped container that was already compiled.');
+    }
+
+    public function isCompiled(): bool
+    {
+        return true;
+    }
+
+    protected function createProxy($class, \Closure $factory)
+    {
+        return $factory();
+    }
+
+    /**
+     * Gets the public 'lazy_foo' shared service.
+     *
+     * @return \Bar\FooClass
+     */
+    protected static function getLazyFooService($container, $lazyLoad = true)
+    {
+        if (true === $lazyLoad) {
+            return $container->services['lazy_foo'] = $container->createProxy('FooClassGhost1728205', static fn () => \FooClassGhost1728205::createLazyGhost(static fn ($proxy) => self::getLazyFooService($container, $proxy)));
+        }
+
+        include_once $container->targetDir.''.'/Fixtures/includes/foo_lazy.php';
+
+        return ($lazyLoad->__construct(new \Bar\FooLazyClass()) && false ?: $lazyLoad);
+    }
+
+    public function getParameter(string $name): array|bool|string|int|float|\UnitEnum|null
+    {
+        if (isset($this->buildParameters[$name])) {
+            return $this->buildParameters[$name];
+        }
+
+        if (!(isset($this->parameters[$name]) || isset($this->loadedDynamicParameters[$name]) || \array_key_exists($name, $this->parameters))) {
+            throw new ParameterNotFoundException($name);
+        }
+
+        if (isset($this->loadedDynamicParameters[$name])) {
+            $value = $this->loadedDynamicParameters[$name] ? $this->dynamicParameters[$name] : $this->getDynamicParameter($name);
+        } else {
+            $value = $this->parameters[$name];
+        }
+
+        return $value;
+    }
+
+    public function hasParameter(string $name): bool
+    {
+        if (isset($this->buildParameters[$name])) {
+            return true;
+        }
+
+        return isset($this->parameters[$name]) || isset($this->loadedDynamicParameters[$name]) || \array_key_exists($name, $this->parameters);
+    }
+
+    public function setParameter(string $name, $value): void
+    {
+        throw new LogicException('Impossible to call set() on a frozen ParameterBag.');
+    }
+
+    public function getParameterBag(): ParameterBagInterface
+    {
+        if (!isset($this->parameterBag)) {
+            $parameters = $this->parameters;
+            foreach ($this->loadedDynamicParameters as $name => $loaded) {
+                $parameters[$name] = $loaded ? $this->dynamicParameters[$name] : $this->getDynamicParameter($name);
+            }
+            foreach ($this->buildParameters as $name => $value) {
+                $parameters[$name] = $value;
+            }
+            $this->parameterBag = new FrozenParameterBag($parameters, []);
+        }
+
+        return $this->parameterBag;
+    }
+
+    private $loadedDynamicParameters = [];
+    private $dynamicParameters = [];
+
+    private function getDynamicParameter(string $name)
+    {
+        throw new ParameterNotFoundException($name);
+    }
+
+    protected function getDefaultParameters(): array
+    {
+        return [
+            'lazy_foo_class' => 'Bar\\FooClass',
+            'container.dumper.inline_factories' => true,
+            'container.dumper.inline_class_loader' => true,
+        ];
+    }
+}
+
+    [ProjectServiceContainer.preload.php] => <?php
+
+// This file has been auto-generated by the Symfony Dependency Injection Component
+// You can reference it in the "opcache.preload" php.ini setting on PHP >= 7.4 when preloading is desired
+
+use Symfony\Component\DependencyInjection\Dumper\Preloader;
+
+if (in_array(PHP_SAPI, ['cli', 'phpdbg', 'embed'], true)) {
+    return;
+}
+
+require dirname(__DIR__, %d).'%svendor/autoload.php';
+(require __DIR__.'/ProjectServiceContainer.php')->set(\Container%s\ProjectServiceContainer::class, null);
+
+$classes = [];
+$classes[] = 'Bar\FooClass';
+$classes[] = 'Bar\FooLazyClass';
+$classes[] = 'Symfony\Component\DependencyInjection\ContainerInterface';
+
+$preloaded = Preloader::preload($classes);
+
+    [ProjectServiceContainer.php] => <?php
+
+// This file has been auto-generated by the Symfony Dependency Injection Component for internal use.
+
+if (\class_exists(\Container%s\ProjectServiceContainer::class, false)) {
+    // no-op
+} elseif (!include __DIR__.'/Container%s/ProjectServiceContainer.php') {
+    touch(__DIR__.'/Container%s.legacy');
+
+    return;
+}
+
+if (!\class_exists(ProjectServiceContainer::class, false)) {
+    \class_alias(\Container%s\ProjectServiceContainer::class, ProjectServiceContainer::class, false);
+}
+
+return new \Container%s\ProjectServiceContainer([
+    'container.build_hash' => '%s',
+    'container.build_id' => '%s',
+    'container.build_time' => 1563381341,
+    'container.runtime_mode' => \in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true) ? 'web=0' : 'web=1',
+], __DIR__.\DIRECTORY_SEPARATOR.'Container%s');
+
+)
diff --git a/Tests/Fixtures/php/legacy_services_dedup_lazy.php b/Tests/Fixtures/php/legacy_services_dedup_lazy.php
new file mode 100644
index 000000000..60add492b
--- /dev/null
+++ b/Tests/Fixtures/php/legacy_services_dedup_lazy.php
@@ -0,0 +1,126 @@
+<?php
+
+use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Container;
+use Symfony\Component\DependencyInjection\Exception\LogicException;
+use Symfony\Component\DependencyInjection\Exception\ParameterNotFoundException;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
+use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
+
+/**
+ * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
+ */
+class ProjectServiceContainer extends Container
+{
+    protected $parameters = [];
+
+    public function __construct()
+    {
+        $this->services = $this->privates = [];
+        $this->methodMap = [
+            'bar' => 'getBarService',
+            'baz' => 'getBazService',
+            'buz' => 'getBuzService',
+            'foo' => 'getFooService',
+        ];
+
+        $this->aliases = [];
+    }
+
+    public function compile(): void
+    {
+        throw new LogicException('You cannot compile a dumped container that was already compiled.');
+    }
+
+    public function isCompiled(): bool
+    {
+        return true;
+    }
+
+    protected function createProxy($class, \Closure $factory)
+    {
+        return $factory();
+    }
+
+    /**
+     * Gets the public 'bar' shared service.
+     *
+     * @return \stdClass
+     */
+    protected static function getBarService($container, $lazyLoad = true)
+    {
+        if (true === $lazyLoad) {
+            return $container->services['bar'] = $container->createProxy('stdClassGhostAa01f12', static fn () => \stdClassGhostAa01f12::createLazyGhost(static fn ($proxy) => self::getBarService($container, $proxy)));
+        }
+
+        return $lazyLoad;
+    }
+
+    /**
+     * Gets the public 'baz' shared service.
+     *
+     * @return \stdClass
+     */
+    protected static function getBazService($container, $lazyLoad = true)
+    {
+        if (true === $lazyLoad) {
+            return $container->services['baz'] = $container->createProxy('stdClassProxyAa01f12', static fn () => \stdClassProxyAa01f12::createLazyProxy(static fn () => self::getBazService($container, false)));
+        }
+
+        return \foo_bar();
+    }
+
+    /**
+     * Gets the public 'buz' shared service.
+     *
+     * @return \stdClass
+     */
+    protected static function getBuzService($container, $lazyLoad = true)
+    {
+        if (true === $lazyLoad) {
+            return $container->services['buz'] = $container->createProxy('stdClassProxyAa01f12', static fn () => \stdClassProxyAa01f12::createLazyProxy(static fn () => self::getBuzService($container, false)));
+        }
+
+        return \foo_bar();
+    }
+
+    /**
+     * Gets the public 'foo' shared service.
+     *
+     * @return \stdClass
+     */
+    protected static function getFooService($container, $lazyLoad = true)
+    {
+        if (true === $lazyLoad) {
+            return $container->services['foo'] = $container->createProxy('stdClassGhostAa01f12', static fn () => \stdClassGhostAa01f12::createLazyGhost(static fn ($proxy) => self::getFooService($container, $proxy)));
+        }
+
+        return $lazyLoad;
+    }
+}
+
+class stdClassGhostAa01f12 extends \stdClass implements \Symfony\Component\VarExporter\LazyObjectInterface
+{
+    use \Symfony\Component\VarExporter\LazyGhostTrait;
+
+    private const LAZY_OBJECT_PROPERTY_SCOPES = [];
+}
+
+// Help opcache.preload discover always-needed symbols
+class_exists(\Symfony\Component\VarExporter\Internal\Hydrator::class);
+class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectRegistry::class);
+class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectState::class);
+
+class stdClassProxyAa01f12 extends \stdClass implements \Symfony\Component\VarExporter\LazyObjectInterface
+{
+    use \Symfony\Component\VarExporter\LazyProxyTrait;
+
+    private const LAZY_OBJECT_PROPERTY_SCOPES = [];
+}
+
+// Help opcache.preload discover always-needed symbols
+class_exists(\Symfony\Component\VarExporter\Internal\Hydrator::class);
+class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectRegistry::class);
+class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectState::class);
diff --git a/Tests/Fixtures/php/legacy_services_non_shared_lazy.php b/Tests/Fixtures/php/legacy_services_non_shared_lazy.php
new file mode 100644
index 000000000..f584bef6b
--- /dev/null
+++ b/Tests/Fixtures/php/legacy_services_non_shared_lazy.php
@@ -0,0 +1,76 @@
+<?php
+
+use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Container;
+use Symfony\Component\DependencyInjection\Exception\LogicException;
+use Symfony\Component\DependencyInjection\Exception\ParameterNotFoundException;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
+use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
+
+/**
+ * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
+ */
+class ProjectServiceContainer extends Container
+{
+    protected $parameters = [];
+
+    public function __construct()
+    {
+        $this->services = $this->privates = [];
+        $this->methodMap = [
+            'bar' => 'getBarService',
+        ];
+
+        $this->aliases = [];
+    }
+
+    public function compile(): void
+    {
+        throw new LogicException('You cannot compile a dumped container that was already compiled.');
+    }
+
+    public function isCompiled(): bool
+    {
+        return true;
+    }
+
+    public function getRemovedIds(): array
+    {
+        return [
+            'foo' => true,
+        ];
+    }
+
+    protected function createProxy($class, \Closure $factory)
+    {
+        return $factory();
+    }
+
+    /**
+     * Gets the public 'bar' shared service.
+     *
+     * @return \stdClass
+     */
+    protected static function getBarService($container)
+    {
+        return $container->services['bar'] = new \stdClass((isset($container->factories['service_container']['foo']) ? $container->factories['service_container']['foo']($container) : self::getFooService($container)));
+    }
+
+    /**
+     * Gets the private 'foo' service.
+     *
+     * @return \stdClass
+     */
+    protected static function getFooService($container, $lazyLoad = true)
+    {
+        $container->factories['service_container']['foo'] ??= self::getFooService(...);
+
+        // lazy factory for stdClass
+
+        return new \stdClass();
+    }
+}
+
+// proxy code for stdClass
diff --git a/Tests/Fixtures/php/legacy_services_non_shared_lazy_as_files.txt b/Tests/Fixtures/php/legacy_services_non_shared_lazy_as_files.txt
new file mode 100644
index 000000000..d52dd5a7b
--- /dev/null
+++ b/Tests/Fixtures/php/legacy_services_non_shared_lazy_as_files.txt
@@ -0,0 +1,173 @@
+Array
+(
+    [Container%s/getNonSharedFooService.php] => <?php
+
+namespace Container%s;
+
+use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+
+/**
+ * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
+ */
+class getNonSharedFooService extends Symfony_DI_PhpDumper_Service_Non_Shared_Lazy_As_File
+{
+    /**
+     * Gets the public 'non_shared_foo' service.
+     *
+     * @return \Bar\FooLazyClass
+     */
+    public static function do($container, $lazyLoad = true)
+    {
+        $container->factories['non_shared_foo'] ??= fn () => self::do($container);
+
+        if (true === $lazyLoad) {
+            return $container->createProxy('FooLazyClassGhost%s', static fn () => \FooLazyClassGhost%s::createLazyGhost(static fn ($proxy) => self::do($container, $proxy)));
+        }
+
+        static $include = true;
+
+        if ($include) {
+            include_once '%sfoo_lazy.php';
+
+            $include = false;
+        }
+
+        return $lazyLoad;
+    }
+}
+
+    [Container%s/FooLazyClassGhost%s.php] => <?php
+
+namespace Container%s;
+
+class FooLazyClassGhost%s extends \Bar\FooLazyClass implements \Symfony\Component\VarExporter\LazyObjectInterface
+{
+    use \Symfony\Component\VarExporter\LazyGhostTrait;
+
+    private const LAZY_OBJECT_PROPERTY_SCOPES = [
+        'foo' => [parent::class, 'foo', null, 4],
+    ];
+}
+
+// Help opcache.preload discover always-needed symbols
+class_exists(\Symfony\Component\VarExporter\Internal\Hydrator::class);
+class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectRegistry::class);
+class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectState::class);
+
+if (!\class_exists('FooLazyClassGhost%s', false)) {
+    \class_alias(__NAMESPACE__.'\\FooLazyClassGhost%s', 'FooLazyClassGhost%s', false);
+}
+
+    [Container%s/Symfony_DI_PhpDumper_Service_Non_Shared_Lazy_As_File.php] => <?php
+
+namespace Container%s;
+
+use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Container;
+use Symfony\Component\DependencyInjection\Exception\LogicException;
+use Symfony\Component\DependencyInjection\Exception\ParameterNotFoundException;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
+use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
+
+/**
+ * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
+ */
+class Symfony_DI_PhpDumper_Service_Non_Shared_Lazy_As_File extends Container
+{
+    protected $parameters = [];
+
+    public function __construct(private array $buildParameters = [], protected string $containerDir = __DIR__)
+    {
+        $this->services = $this->privates = [];
+        $this->fileMap = [
+            'non_shared_foo' => 'getNonSharedFooService',
+        ];
+
+        $this->aliases = [];
+    }
+
+    public function compile(): void
+    {
+        throw new LogicException('You cannot compile a dumped container that was already compiled.');
+    }
+
+    public function isCompiled(): bool
+    {
+        return true;
+    }
+
+    protected function load($file, $lazyLoad = true): mixed
+    {
+        if (class_exists($class = __NAMESPACE__.'\\'.$file, false)) {
+            return $class::do($this, $lazyLoad);
+        }
+
+        if ('.' === $file[-4]) {
+            $class = substr($class, 0, -4);
+        } else {
+            $file .= '.php';
+        }
+
+        $service = require $this->containerDir.\DIRECTORY_SEPARATOR.$file;
+
+        return class_exists($class, false) ? $class::do($this, $lazyLoad) : $service;
+    }
+
+    protected function createProxy($class, \Closure $factory)
+    {
+        class_exists($class, false) || require __DIR__.'/'.$class.'.php';
+
+        return $factory();
+    }
+}
+
+    [Symfony_DI_PhpDumper_Service_Non_Shared_Lazy_As_File.preload.php] => <?php
+
+// This file has been auto-generated by the Symfony Dependency Injection Component
+// You can reference it in the "opcache.preload" php.ini setting on PHP >= 7.4 when preloading is desired
+
+use Symfony\Component\DependencyInjection\Dumper\Preloader;
+
+if (in_array(PHP_SAPI, ['cli', 'phpdbg', 'embed'], true)) {
+    return;
+}
+
+require '%svendor/autoload.php';
+(require __DIR__.'/Symfony_DI_PhpDumper_Service_Non_Shared_Lazy_As_File.php')->set(\Container%s\Symfony_DI_PhpDumper_Service_Non_Shared_Lazy_As_File::class, null);
+require __DIR__.'/Container%s/FooLazyClassGhost%s.php';
+require __DIR__.'/Container%s/getNonSharedFooService.php';
+
+$classes = [];
+$classes[] = 'Bar\FooLazyClass';
+$classes[] = 'Symfony\Component\DependencyInjection\ContainerInterface';
+
+$preloaded = Preloader::preload($classes);
+
+    [Symfony_DI_PhpDumper_Service_Non_Shared_Lazy_As_File.php] => <?php
+
+// This file has been auto-generated by the Symfony Dependency Injection Component for internal use.
+
+if (\class_exists(\Container%s\Symfony_DI_PhpDumper_Service_Non_Shared_Lazy_As_File::class, false)) {
+    // no-op
+} elseif (!include __DIR__.'/Container%s/Symfony_DI_PhpDumper_Service_Non_Shared_Lazy_As_File.php') {
+    touch(__DIR__.'/Container%s.legacy');
+
+    return;
+}
+
+if (!\class_exists(Symfony_DI_PhpDumper_Service_Non_Shared_Lazy_As_File::class, false)) {
+    \class_alias(\Container%s\Symfony_DI_PhpDumper_Service_Non_Shared_Lazy_As_File::class, Symfony_DI_PhpDumper_Service_Non_Shared_Lazy_As_File::class, false);
+}
+
+return new \Container%s\Symfony_DI_PhpDumper_Service_Non_Shared_Lazy_As_File([
+    'container.build_hash' => '%s',
+    'container.build_id' => '%s',
+    'container.build_time' => %d,
+    'container.runtime_mode' => \in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true) ? 'web=0' : 'web=1',
+], __DIR__.\DIRECTORY_SEPARATOR.'Container%s');
+
+)
diff --git a/Tests/Fixtures/php/legacy_services_non_shared_lazy_ghost.php b/Tests/Fixtures/php/legacy_services_non_shared_lazy_ghost.php
new file mode 100644
index 000000000..b03463295
--- /dev/null
+++ b/Tests/Fixtures/php/legacy_services_non_shared_lazy_ghost.php
@@ -0,0 +1,88 @@
+<?php
+
+use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Container;
+use Symfony\Component\DependencyInjection\Exception\LogicException;
+use Symfony\Component\DependencyInjection\Exception\ParameterNotFoundException;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
+use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
+
+/**
+ * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
+ */
+class ProjectServiceContainer extends Container
+{
+    protected $parameters = [];
+
+    public function __construct()
+    {
+        $this->services = $this->privates = [];
+        $this->methodMap = [
+            'bar' => 'getBarService',
+        ];
+
+        $this->aliases = [];
+    }
+
+    public function compile(): void
+    {
+        throw new LogicException('You cannot compile a dumped container that was already compiled.');
+    }
+
+    public function isCompiled(): bool
+    {
+        return true;
+    }
+
+    public function getRemovedIds(): array
+    {
+        return [
+            'foo' => true,
+        ];
+    }
+
+    protected function createProxy($class, \Closure $factory)
+    {
+        return $factory();
+    }
+
+    /**
+     * Gets the public 'bar' shared service.
+     *
+     * @return \stdClass
+     */
+    protected static function getBarService($container)
+    {
+        return $container->services['bar'] = new \stdClass((isset($container->factories['service_container']['foo']) ? $container->factories['service_container']['foo']($container) : self::getFooService($container)));
+    }
+
+    /**
+     * Gets the private 'foo' service.
+     *
+     * @return \stdClass
+     */
+    protected static function getFooService($container, $lazyLoad = true)
+    {
+        $container->factories['service_container']['foo'] ??= self::getFooService(...);
+
+        if (true === $lazyLoad) {
+            return $container->createProxy('stdClassGhostAa01f12', static fn () => \stdClassGhostAa01f12::createLazyGhost(static fn ($proxy) => self::getFooService($container, $proxy)));
+        }
+
+        return $lazyLoad;
+    }
+}
+
+class stdClassGhostAa01f12 extends \stdClass implements \Symfony\Component\VarExporter\LazyObjectInterface
+{
+    use \Symfony\Component\VarExporter\LazyGhostTrait;
+
+    private const LAZY_OBJECT_PROPERTY_SCOPES = [];
+}
+
+// Help opcache.preload discover always-needed symbols
+class_exists(\Symfony\Component\VarExporter\Internal\Hydrator::class);
+class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectRegistry::class);
+class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectState::class);
diff --git a/Tests/Fixtures/php/legacy_services_non_shared_lazy_public.php b/Tests/Fixtures/php/legacy_services_non_shared_lazy_public.php
new file mode 100644
index 000000000..0841cf192
--- /dev/null
+++ b/Tests/Fixtures/php/legacy_services_non_shared_lazy_public.php
@@ -0,0 +1,81 @@
+<?php
+
+use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Container;
+use Symfony\Component\DependencyInjection\Exception\LogicException;
+use Symfony\Component\DependencyInjection\Exception\ParameterNotFoundException;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
+use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
+
+/**
+ * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
+ */
+class Symfony_DI_PhpDumper_Service_Non_Shared_Lazy extends Container
+{
+    protected $parameters = [];
+
+    public function __construct()
+    {
+        $this->services = $this->privates = [];
+        $this->methodMap = [
+            'foo' => 'getFooService',
+        ];
+
+        $this->aliases = [];
+    }
+
+    public function compile(): void
+    {
+        throw new LogicException('You cannot compile a dumped container that was already compiled.');
+    }
+
+    public function isCompiled(): bool
+    {
+        return true;
+    }
+
+    protected function createProxy($class, \Closure $factory)
+    {
+        return $factory();
+    }
+
+    /**
+     * Gets the public 'foo' service.
+     *
+     * @return \Bar\FooLazyClass
+     */
+    protected static function getFooService($container, $lazyLoad = true)
+    {
+        $container->factories['foo'] ??= fn () => self::getFooService($container);
+
+        if (true === $lazyLoad) {
+            return $container->createProxy('FooLazyClassGhost82ad1a4', static fn () => \FooLazyClassGhost82ad1a4::createLazyGhost(static fn ($proxy) => self::getFooService($container, $proxy)));
+        }
+
+        static $include = true;
+
+        if ($include) {
+            include_once __DIR__.'/Fixtures/includes/foo_lazy.php';
+
+            $include = false;
+        }
+
+        return $lazyLoad;
+    }
+}
+
+class FooLazyClassGhost82ad1a4 extends \Bar\FooLazyClass implements \Symfony\Component\VarExporter\LazyObjectInterface
+{
+    use \Symfony\Component\VarExporter\LazyGhostTrait;
+
+    private const LAZY_OBJECT_PROPERTY_SCOPES = [
+        'foo' => [parent::class, 'foo', null, 4],
+    ];
+}
+
+// Help opcache.preload discover always-needed symbols
+class_exists(\Symfony\Component\VarExporter\Internal\Hydrator::class);
+class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectRegistry::class);
+class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectState::class);
diff --git a/Tests/Fixtures/php/legacy_services_wither_lazy.php b/Tests/Fixtures/php/legacy_services_wither_lazy.php
new file mode 100644
index 000000000..b9e916457
--- /dev/null
+++ b/Tests/Fixtures/php/legacy_services_wither_lazy.php
@@ -0,0 +1,86 @@
+<?php
+
+use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Container;
+use Symfony\Component\DependencyInjection\Exception\LogicException;
+use Symfony\Component\DependencyInjection\Exception\ParameterNotFoundException;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
+use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
+
+/**
+ * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
+ */
+class Symfony_DI_PhpDumper_Service_Wither_Lazy extends Container
+{
+    protected $parameters = [];
+
+    public function __construct()
+    {
+        $this->services = $this->privates = [];
+        $this->methodMap = [
+            'wither' => 'getWitherService',
+        ];
+
+        $this->aliases = [];
+    }
+
+    public function compile(): void
+    {
+        throw new LogicException('You cannot compile a dumped container that was already compiled.');
+    }
+
+    public function isCompiled(): bool
+    {
+        return true;
+    }
+
+    public function getRemovedIds(): array
+    {
+        return [
+            'Symfony\\Component\\DependencyInjection\\Tests\\Compiler\\Foo' => true,
+        ];
+    }
+
+    protected function createProxy($class, \Closure $factory)
+    {
+        return $factory();
+    }
+
+    /**
+     * Gets the public 'wither' shared autowired service.
+     *
+     * @return \Symfony\Component\DependencyInjection\Tests\Compiler\Wither
+     */
+    protected static function getWitherService($container, $lazyLoad = true)
+    {
+        if (true === $lazyLoad) {
+            return $container->services['wither'] = $container->createProxy('WitherProxy1991f2a', static fn () => \WitherProxy1991f2a::createLazyProxy(static fn () => self::getWitherService($container, false)));
+        }
+
+        $instance = new \Symfony\Component\DependencyInjection\Tests\Compiler\Wither();
+
+        $a = ($container->privates['Symfony\\Component\\DependencyInjection\\Tests\\Compiler\\Foo'] ??= new \Symfony\Component\DependencyInjection\Tests\Compiler\Foo());
+
+        $instance = $instance->withFoo1($a);
+        $instance = $instance->withFoo2($a);
+        $instance->setFoo($a);
+
+        return $instance;
+    }
+}
+
+class WitherProxy1991f2a extends \Symfony\Component\DependencyInjection\Tests\Compiler\Wither implements \Symfony\Component\VarExporter\LazyObjectInterface
+{
+    use \Symfony\Component\VarExporter\LazyProxyTrait;
+
+    private const LAZY_OBJECT_PROPERTY_SCOPES = [
+        'foo' => [parent::class, 'foo', null, 4],
+    ];
+}
+
+// Help opcache.preload discover always-needed symbols
+class_exists(\Symfony\Component\VarExporter\Internal\Hydrator::class);
+class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectRegistry::class);
+class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectState::class);
diff --git a/Tests/Fixtures/php/legacy_services_wither_lazy_non_shared.php b/Tests/Fixtures/php/legacy_services_wither_lazy_non_shared.php
new file mode 100644
index 000000000..d70588f65
--- /dev/null
+++ b/Tests/Fixtures/php/legacy_services_wither_lazy_non_shared.php
@@ -0,0 +1,88 @@
+<?php
+
+use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Container;
+use Symfony\Component\DependencyInjection\Exception\LogicException;
+use Symfony\Component\DependencyInjection\Exception\ParameterNotFoundException;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
+use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
+
+/**
+ * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
+ */
+class Symfony_DI_PhpDumper_Service_Wither_Lazy_Non_Shared extends Container
+{
+    protected $parameters = [];
+
+    public function __construct()
+    {
+        $this->services = $this->privates = [];
+        $this->methodMap = [
+            'wither' => 'getWitherService',
+        ];
+
+        $this->aliases = [];
+    }
+
+    public function compile(): void
+    {
+        throw new LogicException('You cannot compile a dumped container that was already compiled.');
+    }
+
+    public function isCompiled(): bool
+    {
+        return true;
+    }
+
+    public function getRemovedIds(): array
+    {
+        return [
+            'Symfony\\Component\\DependencyInjection\\Tests\\Compiler\\Foo' => true,
+        ];
+    }
+
+    protected function createProxy($class, \Closure $factory)
+    {
+        return $factory();
+    }
+
+    /**
+     * Gets the public 'wither' autowired service.
+     *
+     * @return \Symfony\Component\DependencyInjection\Tests\Compiler\Wither
+     */
+    protected static function getWitherService($container, $lazyLoad = true)
+    {
+        $container->factories['wither'] ??= fn () => self::getWitherService($container);
+
+        if (true === $lazyLoad) {
+            return $container->createProxy('WitherProxyE94fdba', static fn () => \WitherProxyE94fdba::createLazyProxy(static fn () => self::getWitherService($container, false)));
+        }
+
+        $instance = new \Symfony\Component\DependencyInjection\Tests\Compiler\Wither();
+
+        $a = ($container->privates['Symfony\\Component\\DependencyInjection\\Tests\\Compiler\\Foo'] ??= new \Symfony\Component\DependencyInjection\Tests\Compiler\Foo());
+
+        $instance = $instance->withFoo1($a);
+        $instance = $instance->withFoo2($a);
+        $instance->setFoo($a);
+
+        return $instance;
+    }
+}
+
+class WitherProxyE94fdba extends \Symfony\Component\DependencyInjection\Tests\Compiler\Wither implements \Symfony\Component\VarExporter\LazyObjectInterface
+{
+    use \Symfony\Component\VarExporter\LazyProxyTrait;
+
+    private const LAZY_OBJECT_PROPERTY_SCOPES = [
+        'foo' => [parent::class, 'foo', null, 4],
+    ];
+}
+
+// Help opcache.preload discover always-needed symbols
+class_exists(\Symfony\Component\VarExporter\Internal\Hydrator::class);
+class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectRegistry::class);
+class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectState::class);
diff --git a/Tests/Fixtures/php/services9_lazy_inlined_factories.txt b/Tests/Fixtures/php/services9_lazy_inlined_factories.txt
index f945fdd50..9e6a3865f 100644
--- a/Tests/Fixtures/php/services9_lazy_inlined_factories.txt
+++ b/Tests/Fixtures/php/services9_lazy_inlined_factories.txt
@@ -1,18 +1,5 @@
 Array
 (
-    [Container%s/proxy-classes.php] => <?php
-
-namespace Container%s;
-
-include_once $container->targetDir.''.'/Fixtures/includes/foo.php';
-
-class FooClassGhost1728205 extends \Bar\FooClass implements \Symfony\Component\VarExporter\LazyObjectInterface
-%A
-
-if (!\class_exists('FooClassGhost1728205', false)) {
-    \class_alias(__NAMESPACE__.'\\FooClassGhost1728205', 'FooClassGhost1728205', false);
-}
-
     [Container%s/ProjectServiceContainer.php] => <?php
 
 namespace Container%s;
@@ -45,10 +32,6 @@ class ProjectServiceContainer extends Container
         ];
 
         $this->aliases = [];
-
-        $this->privates['service_container'] = static function ($container) {
-            include_once __DIR__.'/proxy-classes.php';
-        };
     }
 
     public function compile(): void
@@ -74,9 +57,10 @@ class ProjectServiceContainer extends Container
     protected static function getLazyFooService($container, $lazyLoad = true)
     {
         if (true === $lazyLoad) {
-            return $container->services['lazy_foo'] = $container->createProxy('FooClassGhost1728205', static fn () => \FooClassGhost1728205::createLazyGhost(static fn ($proxy) => self::getLazyFooService($container, $proxy)));
+            return $container->services['lazy_foo'] = new \ReflectionClass('Bar\FooClass')->newLazyGhost(static function ($proxy) use ($container) { self::getLazyFooService($container, $proxy); });
         }
 
+        include_once $container->targetDir.''.'/Fixtures/includes/foo.php';
         include_once $container->targetDir.''.'/Fixtures/includes/foo_lazy.php';
 
         return ($lazyLoad->__construct(new \Bar\FooLazyClass()) && false ?: $lazyLoad);
diff --git a/Tests/Fixtures/php/services_dedup_lazy.php b/Tests/Fixtures/php/services_dedup_lazy.php
index 60add492b..2c6142d0e 100644
--- a/Tests/Fixtures/php/services_dedup_lazy.php
+++ b/Tests/Fixtures/php/services_dedup_lazy.php
@@ -52,7 +52,7 @@ protected function createProxy($class, \Closure $factory)
     protected static function getBarService($container, $lazyLoad = true)
     {
         if (true === $lazyLoad) {
-            return $container->services['bar'] = $container->createProxy('stdClassGhostAa01f12', static fn () => \stdClassGhostAa01f12::createLazyGhost(static fn ($proxy) => self::getBarService($container, $proxy)));
+            return $container->services['bar'] = new \ReflectionClass('stdClass')->newLazyGhost(static function ($proxy) use ($container) { self::getBarService($container, $proxy); });
         }
 
         return $lazyLoad;
@@ -94,28 +94,16 @@ protected static function getBuzService($container, $lazyLoad = true)
     protected static function getFooService($container, $lazyLoad = true)
     {
         if (true === $lazyLoad) {
-            return $container->services['foo'] = $container->createProxy('stdClassGhostAa01f12', static fn () => \stdClassGhostAa01f12::createLazyGhost(static fn ($proxy) => self::getFooService($container, $proxy)));
+            return $container->services['foo'] = new \ReflectionClass('stdClass')->newLazyGhost(static function ($proxy) use ($container) { self::getFooService($container, $proxy); });
         }
 
         return $lazyLoad;
     }
 }
 
-class stdClassGhostAa01f12 extends \stdClass implements \Symfony\Component\VarExporter\LazyObjectInterface
-{
-    use \Symfony\Component\VarExporter\LazyGhostTrait;
-
-    private const LAZY_OBJECT_PROPERTY_SCOPES = [];
-}
-
-// Help opcache.preload discover always-needed symbols
-class_exists(\Symfony\Component\VarExporter\Internal\Hydrator::class);
-class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectRegistry::class);
-class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectState::class);
-
 class stdClassProxyAa01f12 extends \stdClass implements \Symfony\Component\VarExporter\LazyObjectInterface
 {
-    use \Symfony\Component\VarExporter\LazyProxyTrait;
+    use \Symfony\Component\VarExporter\Internal\LazyDecoratorTrait;
 
     private const LAZY_OBJECT_PROPERTY_SCOPES = [];
 }
@@ -123,4 +111,3 @@ class stdClassProxyAa01f12 extends \stdClass implements \Symfony\Component\VarEx
 // Help opcache.preload discover always-needed symbols
 class_exists(\Symfony\Component\VarExporter\Internal\Hydrator::class);
 class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectRegistry::class);
-class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectState::class);
diff --git a/Tests/Fixtures/php/services_non_shared_lazy_as_files.txt b/Tests/Fixtures/php/services_non_shared_lazy_as_files.txt
index 488895d7c..69a47220c 100644
--- a/Tests/Fixtures/php/services_non_shared_lazy_as_files.txt
+++ b/Tests/Fixtures/php/services_non_shared_lazy_as_files.txt
@@ -23,7 +23,7 @@ class getNonSharedFooService extends Symfony_DI_PhpDumper_Service_Non_Shared_Laz
         $container->factories['non_shared_foo'] ??= fn () => self::do($container);
 
         if (true === $lazyLoad) {
-            return $container->createProxy('FooLazyClassGhost%s', static fn () => \FooLazyClassGhost%s::createLazyGhost(static fn ($proxy) => self::do($container, $proxy)));
+            return new \ReflectionClass('Bar\FooLazyClass')->newLazyGhost(static function ($proxy) use ($container) { self::do($container, $proxy); });
         }
 
         static $include = true;
@@ -38,26 +38,6 @@ class getNonSharedFooService extends Symfony_DI_PhpDumper_Service_Non_Shared_Laz
     }
 }
 
-    [Container%s/FooLazyClassGhost%s.php] => <?php
-
-namespace Container%s;
-
-class FooLazyClassGhost%s extends \Bar\FooLazyClass implements \Symfony\Component\VarExporter\LazyObjectInterface
-{
-    use \Symfony\Component\VarExporter\LazyGhostTrait;
-
-    private const LAZY_OBJECT_PROPERTY_SCOPES = [];
-}
-
-// Help opcache.preload discover always-needed symbols
-class_exists(\Symfony\Component\VarExporter\Internal\Hydrator::class);
-class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectRegistry::class);
-class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectState::class);
-
-if (!\class_exists('FooLazyClassGhost%s', false)) {
-    \class_alias(__NAMESPACE__.'\\FooLazyClassGhost%s', 'FooLazyClassGhost%s', false);
-}
-
     [Container%s/Symfony_DI_PhpDumper_Service_Non_Shared_Lazy_As_File.php] => <?php
 
 namespace Container%s;
@@ -136,7 +116,6 @@ if (in_array(PHP_SAPI, ['cli', 'phpdbg', 'embed'], true)) {
 
 require '%svendor/autoload.php';
 (require __DIR__.'/Symfony_DI_PhpDumper_Service_Non_Shared_Lazy_As_File.php')->set(\Container%s\Symfony_DI_PhpDumper_Service_Non_Shared_Lazy_As_File::class, null);
-require __DIR__.'/Container%s/FooLazyClassGhost%s.php';
 require __DIR__.'/Container%s/getNonSharedFooService.php';
 
 $classes = [];
diff --git a/Tests/Fixtures/php/services_non_shared_lazy_ghost.php b/Tests/Fixtures/php/services_non_shared_lazy_ghost.php
index b03463295..281baf615 100644
--- a/Tests/Fixtures/php/services_non_shared_lazy_ghost.php
+++ b/Tests/Fixtures/php/services_non_shared_lazy_ghost.php
@@ -68,21 +68,9 @@ protected static function getFooService($container, $lazyLoad = true)
         $container->factories['service_container']['foo'] ??= self::getFooService(...);
 
         if (true === $lazyLoad) {
-            return $container->createProxy('stdClassGhostAa01f12', static fn () => \stdClassGhostAa01f12::createLazyGhost(static fn ($proxy) => self::getFooService($container, $proxy)));
+            return new \ReflectionClass('stdClass')->newLazyGhost(static function ($proxy) use ($container) { self::getFooService($container, $proxy); });
         }
 
         return $lazyLoad;
     }
 }
-
-class stdClassGhostAa01f12 extends \stdClass implements \Symfony\Component\VarExporter\LazyObjectInterface
-{
-    use \Symfony\Component\VarExporter\LazyGhostTrait;
-
-    private const LAZY_OBJECT_PROPERTY_SCOPES = [];
-}
-
-// Help opcache.preload discover always-needed symbols
-class_exists(\Symfony\Component\VarExporter\Internal\Hydrator::class);
-class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectRegistry::class);
-class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectState::class);
diff --git a/Tests/Fixtures/php/services_non_shared_lazy_public.php b/Tests/Fixtures/php/services_non_shared_lazy_public.php
index 7f870f886..93b7ee3ed 100644
--- a/Tests/Fixtures/php/services_non_shared_lazy_public.php
+++ b/Tests/Fixtures/php/services_non_shared_lazy_public.php
@@ -51,7 +51,7 @@ protected static function getFooService($container, $lazyLoad = true)
         $container->factories['foo'] ??= fn () => self::getFooService($container);
 
         if (true === $lazyLoad) {
-            return $container->createProxy('FooLazyClassGhost82ad1a4', static fn () => \FooLazyClassGhost82ad1a4::createLazyGhost(static fn ($proxy) => self::getFooService($container, $proxy)));
+            return new \ReflectionClass('Bar\FooLazyClass')->newLazyGhost(static function ($proxy) use ($container) { self::getFooService($container, $proxy); });
         }
 
         static $include = true;
@@ -65,15 +65,3 @@ protected static function getFooService($container, $lazyLoad = true)
         return $lazyLoad;
     }
 }
-
-class FooLazyClassGhost82ad1a4 extends \Bar\FooLazyClass implements \Symfony\Component\VarExporter\LazyObjectInterface
-{
-    use \Symfony\Component\VarExporter\LazyGhostTrait;
-
-    private const LAZY_OBJECT_PROPERTY_SCOPES = [];
-}
-
-// Help opcache.preload discover always-needed symbols
-class_exists(\Symfony\Component\VarExporter\Internal\Hydrator::class);
-class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectRegistry::class);
-class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectState::class);
diff --git a/Tests/Fixtures/php/services_wither_lazy.php b/Tests/Fixtures/php/services_wither_lazy.php
index b9e916457..76031f1ca 100644
--- a/Tests/Fixtures/php/services_wither_lazy.php
+++ b/Tests/Fixtures/php/services_wither_lazy.php
@@ -56,7 +56,7 @@ protected function createProxy($class, \Closure $factory)
     protected static function getWitherService($container, $lazyLoad = true)
     {
         if (true === $lazyLoad) {
-            return $container->services['wither'] = $container->createProxy('WitherProxy1991f2a', static fn () => \WitherProxy1991f2a::createLazyProxy(static fn () => self::getWitherService($container, false)));
+            return $container->services['wither'] = new \ReflectionClass('Symfony\Component\DependencyInjection\Tests\Compiler\Wither')->newLazyProxy(static fn () => self::getWitherService($container, false));
         }
 
         $instance = new \Symfony\Component\DependencyInjection\Tests\Compiler\Wither();
@@ -70,17 +70,3 @@ protected static function getWitherService($container, $lazyLoad = true)
         return $instance;
     }
 }
-
-class WitherProxy1991f2a extends \Symfony\Component\DependencyInjection\Tests\Compiler\Wither implements \Symfony\Component\VarExporter\LazyObjectInterface
-{
-    use \Symfony\Component\VarExporter\LazyProxyTrait;
-
-    private const LAZY_OBJECT_PROPERTY_SCOPES = [
-        'foo' => [parent::class, 'foo', null, 4],
-    ];
-}
-
-// Help opcache.preload discover always-needed symbols
-class_exists(\Symfony\Component\VarExporter\Internal\Hydrator::class);
-class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectRegistry::class);
-class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectState::class);
diff --git a/Tests/Fixtures/php/services_wither_lazy_non_shared.php b/Tests/Fixtures/php/services_wither_lazy_non_shared.php
index d70588f65..640955a7e 100644
--- a/Tests/Fixtures/php/services_wither_lazy_non_shared.php
+++ b/Tests/Fixtures/php/services_wither_lazy_non_shared.php
@@ -58,7 +58,7 @@ protected static function getWitherService($container, $lazyLoad = true)
         $container->factories['wither'] ??= fn () => self::getWitherService($container);
 
         if (true === $lazyLoad) {
-            return $container->createProxy('WitherProxyE94fdba', static fn () => \WitherProxyE94fdba::createLazyProxy(static fn () => self::getWitherService($container, false)));
+            return new \ReflectionClass('Symfony\Component\DependencyInjection\Tests\Compiler\Wither')->newLazyProxy(static fn () => self::getWitherService($container, false));
         }
 
         $instance = new \Symfony\Component\DependencyInjection\Tests\Compiler\Wither();
@@ -72,17 +72,3 @@ protected static function getWitherService($container, $lazyLoad = true)
         return $instance;
     }
 }
-
-class WitherProxyE94fdba extends \Symfony\Component\DependencyInjection\Tests\Compiler\Wither implements \Symfony\Component\VarExporter\LazyObjectInterface
-{
-    use \Symfony\Component\VarExporter\LazyProxyTrait;
-
-    private const LAZY_OBJECT_PROPERTY_SCOPES = [
-        'foo' => [parent::class, 'foo', null, 4],
-    ];
-}
-
-// Help opcache.preload discover always-needed symbols
-class_exists(\Symfony\Component\VarExporter\Internal\Hydrator::class);
-class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectRegistry::class);
-class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectState::class);
diff --git a/Tests/Fixtures/yaml/services_with_short_service_closure.yml b/Tests/Fixtures/yaml/services_with_short_service_closure.yml
new file mode 100644
index 000000000..7215e538d
--- /dev/null
+++ b/Tests/Fixtures/yaml/services_with_short_service_closure.yml
@@ -0,0 +1,8 @@
+services:
+    service_container:
+        class: Symfony\Component\DependencyInjection\ContainerInterface
+        public: true
+        synthetic: true
+    foo:
+        class: Foo
+        arguments: ['@>bar']
diff --git a/Tests/LazyProxy/Instantiator/LazyServiceInstantiatorTest.php b/Tests/LazyProxy/Instantiator/LazyServiceInstantiatorTest.php
new file mode 100644
index 000000000..359b9824b
--- /dev/null
+++ b/Tests/LazyProxy/Instantiator/LazyServiceInstantiatorTest.php
@@ -0,0 +1,45 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\DependencyInjection\Tests\LazyProxy\Instantiator;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\DependencyInjection\Container;
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\LazyProxy\Instantiator\LazyServiceInstantiator;
+use Symfony\Component\DependencyInjection\Tests\Fixtures\AbstractSayClass;
+
+class LazyServiceInstantiatorTest extends TestCase
+{
+    public function testInstantiateAbstractClassProxy()
+    {
+        $instantiator = new LazyServiceInstantiator();
+        $instance = new class extends AbstractSayClass {
+            public int $calls = 0;
+
+            public function say(): string
+            {
+                ++$this->calls;
+
+                return 'Hello from the abstract class!';
+            }
+        };
+
+        $definition = (new Definition(AbstractSayClass::class))
+            ->setLazy(true);
+
+        $proxy = $instantiator->instantiateProxy(new Container(), $definition, 'foo', fn () => $instance);
+
+        $this->assertSame(0, $instance->calls);
+        $this->assertSame('Hello from the abstract class!', $proxy->say());
+        $this->assertSame(1, $instance->calls);
+    }
+}
diff --git a/Tests/LazyProxy/PhpDumper/LazyServiceDumperTest.php b/Tests/LazyProxy/PhpDumper/LazyServiceDumperTest.php
index 467972a88..1d5e9b6bf 100644
--- a/Tests/LazyProxy/PhpDumper/LazyServiceDumperTest.php
+++ b/Tests/LazyProxy/PhpDumper/LazyServiceDumperTest.php
@@ -16,6 +16,7 @@
 use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
 use Symfony\Component\DependencyInjection\LazyProxy\PhpDumper\LazyServiceDumper;
+use Symfony\Component\DependencyInjection\Tests\Fixtures\AbstractSayClass;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\ReadOnlyClass;
 
 class LazyServiceDumperTest extends TestCase
@@ -40,6 +41,16 @@ public function testFinalClassInterface()
         $this->assertStringContainsString('function get(', $dumper->getProxyCode($definition));
     }
 
+    public function testAbstractClass()
+    {
+        $dumper = new LazyServiceDumper();
+        $definition = (new Definition(AbstractSayClass::class))
+            ->setLazy(true);
+
+        $this->assertTrue($dumper->isProxyCandidate($definition));
+        $this->assertNotSame(AbstractSayClass::class, $dumper->getProxyClass($definition, false));
+    }
+
     public function testInvalidClass()
     {
         $dumper = new LazyServiceDumper();
@@ -63,7 +74,7 @@ public function testReadonlyClass()
         $definition = (new Definition(ReadOnlyClass::class))->setLazy(true);
 
         $this->assertTrue($dumper->isProxyCandidate($definition));
-        $this->assertStringContainsString('readonly class ReadOnlyClassGhost', $dumper->getProxyCode($definition));
+        $this->assertStringContainsString(\PHP_VERSION_ID >= 80400 ? '' : 'readonly class ReadOnlyClassGhost', $dumper->getProxyCode($definition));
     }
 }
 
diff --git a/Tests/Loader/FileLoaderTest.php b/Tests/Loader/FileLoaderTest.php
index a195f2a93..0ad1b363c 100644
--- a/Tests/Loader/FileLoaderTest.php
+++ b/Tests/Loader/FileLoaderTest.php
@@ -33,14 +33,18 @@
 use Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\OtherDir\AnotherSub;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\OtherDir\AnotherSub\DeeperBaz;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\OtherDir\Baz;
+use Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\StaticConstructor\PrototypeStaticConstructor;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\Sub\Bar;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\Sub\BarInterface;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\PrototypeAsAlias\AliasBarInterface;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\PrototypeAsAlias\AliasFooInterface;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\PrototypeAsAlias\WithAsAlias;
+use Symfony\Component\DependencyInjection\Tests\Fixtures\PrototypeAsAlias\WithAsAliasBothEnv;
+use Symfony\Component\DependencyInjection\Tests\Fixtures\PrototypeAsAlias\WithAsAliasDevEnv;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\PrototypeAsAlias\WithAsAliasIdMultipleInterface;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\PrototypeAsAlias\WithAsAliasInterface;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\PrototypeAsAlias\WithAsAliasMultiple;
+use Symfony\Component\DependencyInjection\Tests\Fixtures\PrototypeAsAlias\WithAsAliasProdEnv;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\Utils\NotAService;
 
 class FileLoaderTest extends TestCase
@@ -348,10 +352,10 @@ public function testRegisterThrowsWithBothWhenAndNotWhenAttribute()
     /**
      * @dataProvider provideResourcesWithAsAliasAttributes
      */
-    public function testRegisterClassesWithAsAlias(string $resource, array $expectedAliases)
+    public function testRegisterClassesWithAsAlias(string $resource, array $expectedAliases, ?string $env = null)
     {
         $container = new ContainerBuilder();
-        $loader = new TestFileLoader($container, new FileLocator(self::$fixturesPath.'/Fixtures'));
+        $loader = new TestFileLoader($container, new FileLocator(self::$fixturesPath.'/Fixtures'), $env);
         $loader->registerClasses(
             (new Definition())->setAutoconfigured(true),
             'Symfony\Component\DependencyInjection\Tests\Fixtures\PrototypeAsAlias\\',
@@ -373,6 +377,15 @@ public static function provideResourcesWithAsAliasAttributes(): iterable
             AliasBarInterface::class => new Alias(WithAsAliasIdMultipleInterface::class),
             AliasFooInterface::class => new Alias(WithAsAliasIdMultipleInterface::class),
         ]];
+        yield 'Dev-env specific' => ['PrototypeAsAlias/WithAsAlias*Env.php', [
+            AliasFooInterface::class => new Alias(WithAsAliasDevEnv::class),
+            AliasBarInterface::class => new Alias(WithAsAliasBothEnv::class),
+        ], 'dev'];
+        yield 'Prod-env specific' => ['PrototypeAsAlias/WithAsAlias*Env.php', [
+            AliasFooInterface::class => new Alias(WithAsAliasProdEnv::class),
+            AliasBarInterface::class => new Alias(WithAsAliasBothEnv::class),
+        ], 'prod'];
+        yield 'Test-env specific' => ['PrototypeAsAlias/WithAsAlias*Env.php', [], 'test'];
     }
 
     /**
@@ -380,11 +393,11 @@ public static function provideResourcesWithAsAliasAttributes(): iterable
      */
     public function testRegisterClassesWithDuplicatedAsAlias(string $resource, string $expectedExceptionMessage)
     {
-        $this->expectException(LogicException::class);
-        $this->expectExceptionMessage($expectedExceptionMessage);
-
         $container = new ContainerBuilder();
         $loader = new TestFileLoader($container, new FileLocator(self::$fixturesPath.'/Fixtures'));
+
+        $this->expectException(LogicException::class);
+        $this->expectExceptionMessage($expectedExceptionMessage);
         $loader->registerClasses(
             (new Definition())->setAutoconfigured(true),
             'Symfony\Component\DependencyInjection\Tests\Fixtures\PrototypeAsAlias\\',
@@ -400,17 +413,28 @@ public static function provideResourcesWithDuplicatedAsAliasAttributes(): iterab
 
     public function testRegisterClassesWithAsAliasAndImplementingMultipleInterfaces()
     {
-        $this->expectException(LogicException::class);
-        $this->expectExceptionMessage('Alias cannot be automatically determined for class "Symfony\Component\DependencyInjection\Tests\Fixtures\PrototypeAsAlias\WithAsAliasMultipleInterface". If you have used the #[AsAlias] attribute with a class implementing multiple interfaces, add the interface you want to alias to the first parameter of #[AsAlias].');
-
         $container = new ContainerBuilder();
         $loader = new TestFileLoader($container, new FileLocator(self::$fixturesPath.'/Fixtures'));
+
+        $this->expectException(LogicException::class);
+        $this->expectExceptionMessage('Alias cannot be automatically determined for class "Symfony\Component\DependencyInjection\Tests\Fixtures\PrototypeAsAlias\WithAsAliasMultipleInterface". If you have used the #[AsAlias] attribute with a class implementing multiple interfaces, add the interface you want to alias to the first parameter of #[AsAlias].');
         $loader->registerClasses(
             (new Definition())->setAutoconfigured(true),
             'Symfony\Component\DependencyInjection\Tests\Fixtures\PrototypeAsAlias\\',
             'PrototypeAsAlias/{WithAsAliasMultipleInterface,AliasBarInterface,AliasFooInterface}.php'
         );
     }
+
+    public function testRegisterClassesWithStaticConstructor()
+    {
+        $container = new ContainerBuilder();
+        $loader = new TestFileLoader($container, new FileLocator(self::$fixturesPath.'/Fixtures'));
+
+        $prototype = (new Definition())->setAutoconfigured(true);
+        $loader->registerClasses($prototype, 'Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\StaticConstructor\\', 'Prototype/StaticConstructor');
+
+        $this->assertTrue($container->has(PrototypeStaticConstructor::class));
+    }
 }
 
 class TestFileLoader extends FileLoader
diff --git a/Tests/Loader/XmlFileLoaderTest.php b/Tests/Loader/XmlFileLoaderTest.php
index 1b4361411..f962fa106 100644
--- a/Tests/Loader/XmlFileLoaderTest.php
+++ b/Tests/Loader/XmlFileLoaderTest.php
@@ -1280,7 +1280,7 @@ public function testStaticConstructor()
     public function testStaticConstructorWithFactoryThrows()
     {
         $container = new ContainerBuilder();
-        $loader = new XmlFileLoader($container, new FileLocator(self::$fixturesPath . '/xml'));
+        $loader = new XmlFileLoader($container, new FileLocator(self::$fixturesPath.'/xml'));
 
         $this->expectException(LogicException::class);
         $this->expectExceptionMessage('The "static_constructor" service cannot declare a factory as well as a constructor.');
@@ -1341,7 +1341,7 @@ public function testUnknownConstantAsKey()
     public function testDeprecatedTagged()
     {
         $container = new ContainerBuilder();
-        $loader = new XmlFileLoader($container, new FileLocator(self::$fixturesPath . '/xml'));
+        $loader = new XmlFileLoader($container, new FileLocator(self::$fixturesPath.'/xml'));
 
         $this->expectUserDeprecationMessage(\sprintf('Since symfony/dependency-injection 7.2: Type "tagged" is deprecated for tag <argument>, use "tagged_iterator" instead in "%s/xml%sservices_with_deprecated_tagged.xml".', self::$fixturesPath, \DIRECTORY_SEPARATOR));
 
diff --git a/Tests/Loader/YamlFileLoaderTest.php b/Tests/Loader/YamlFileLoaderTest.php
index 8da59796e..54900e4c3 100644
--- a/Tests/Loader/YamlFileLoaderTest.php
+++ b/Tests/Loader/YamlFileLoaderTest.php
@@ -466,6 +466,15 @@ public function testParseServiceClosure()
         $this->assertEquals(new ServiceClosureArgument(new Reference('bar', ContainerInterface::IGNORE_ON_INVALID_REFERENCE)), $container->getDefinition('foo')->getArgument(0));
     }
 
+    public function testParseShortServiceClosure()
+    {
+        $container = new ContainerBuilder();
+        $loader = new YamlFileLoader($container, new FileLocator(self::$fixturesPath.'/yaml'));
+        $loader->load('services_with_short_service_closure.yml');
+
+        $this->assertEquals(new ServiceClosureArgument(new Reference('bar')), $container->getDefinition('foo')->getArgument(0));
+    }
+
     public function testNameOnlyTagsAreAllowedAsString()
     {
         $container = new ContainerBuilder();
@@ -841,7 +850,7 @@ public function testAnonymousServicesInInstanceof()
         $anonymous = $container->getDefinition((string) $args['foo']);
         $this->assertEquals('Anonymous', $anonymous->getClass());
         $this->assertFalse($anonymous->isPublic());
-        $this->assertEmpty($anonymous->getInstanceofConditionals());
+        $this->assertSame([], $anonymous->getInstanceofConditionals());
 
         $this->assertFalse($container->has('Bar'));
     }
diff --git a/Tests/ParameterBag/EnvPlaceholderParameterBagTest.php b/Tests/ParameterBag/EnvPlaceholderParameterBagTest.php
index ee0af9ff3..b6779b450 100644
--- a/Tests/ParameterBag/EnvPlaceholderParameterBagTest.php
+++ b/Tests/ParameterBag/EnvPlaceholderParameterBagTest.php
@@ -66,7 +66,7 @@ public function testMergeWhereFirstBagIsEmptyWillWork()
         // initialize placeholder only in second bag
         $secondBag->get($parameter);
 
-        $this->assertEmpty($firstBag->getEnvPlaceholders());
+        $this->assertSame([], $firstBag->getEnvPlaceholders());
 
         $firstBag->mergeEnvPlaceholders($secondBag);
         $mergedPlaceholders = $firstBag->getEnvPlaceholders();

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