diff --git a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
index 48427038b1197..3f5fd134ef6f7 100644
--- a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
+++ b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
@@ -1952,7 +1952,7 @@ private function getServiceCall(string $id, Reference $reference = null): string
                 }
                 $code = $this->addNewInstance($definition, '', $id);
                 if ($definition->isShared() && !isset($this->singleUsePrivateIds[$id])) {
-                    return sprintf('$this->%s[%s] ??= %s', $definition->isPublic() ? 'services' : 'privates', $this->doExport($id), $code);
+                    return sprintf('($this->%s[%s] ??= %s)', $definition->isPublic() ? 'services' : 'privates', $this->doExport($id), $code);
                 }
                 $code = "($code)";
             } else {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/services9.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/services9.php
index aa132a4fb6150..9a8ccacefe5f3 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/services9.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/services9.php
@@ -137,6 +137,13 @@
         ->tag('container.preload', ['class' => 'Some\Sidekick2'])
         ->public();
 
+    $s->set('a_factory', 'Bar')
+        ->private();
+    $s->set('a_service', 'Bar')
+        ->factory([service('a_factory'), 'getBar']);
+    $s->set('b_service', 'Bar')
+        ->factory([service('a_factory'), 'getBar']);
+
     $s->alias('alias_for_foo', 'foo')->private()->public();
     $s->alias('alias_for_alias', service('alias_for_foo'));
 };
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container9.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container9.php
index 47922be9bde58..a178250aa6125 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container9.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container9.php
@@ -189,4 +189,12 @@
     ->addTag('container.preload', ['class' => 'Some\Sidekick1'])
     ->addTag('container.preload', ['class' => 'Some\Sidekick2']);
 
+$container->register('a_factory', 'Bar');
+$container->register('a_service', 'Bar')
+    ->setFactory([new Reference('a_factory'), 'getBar'])
+    ->setPublic(true);
+$container->register('b_service', 'Bar')
+    ->setFactory([new Reference('a_factory'), 'getBar'])
+    ->setPublic(true);
+
 return $container;
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/graphviz/services9.dot b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/graphviz/services9.dot
index 74af3cc094111..90937983717da 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/graphviz/services9.dot
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/graphviz/services9.dot
@@ -37,6 +37,9 @@ digraph sc {
   node_runtime_error [label="runtime_error\nstdClass\n", shape=record, fillcolor="#eeeeee", style="filled"];
   node_errored_definition [label="errored_definition\nstdClass\n", shape=record, fillcolor="#eeeeee", style="filled"];
   node_preload_sidekick [label="preload_sidekick\nstdClass\n", shape=record, fillcolor="#eeeeee", style="filled"];
+  node_a_factory [label="a_factory\nBar\n", shape=record, fillcolor="#eeeeee", style="filled"];
+  node_a_service [label="a_service\nBar\n", shape=record, fillcolor="#eeeeee", style="filled"];
+  node_b_service [label="b_service\nBar\n", shape=record, fillcolor="#eeeeee", style="filled"];
   node_foo2 [label="foo2\n\n", shape=record, fillcolor="#ff9999", style="filled"];
   node_foo3 [label="foo3\n\n", shape=record, fillcolor="#ff9999", style="filled"];
   node_foobaz [label="foobaz\n\n", shape=record, fillcolor="#ff9999", style="filled"];
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_as_files.txt b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_as_files.txt
index ed8beb93f34f5..71e12e573e620 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_as_files.txt
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_as_files.txt
@@ -5,6 +5,7 @@ Array
 namespace Container%s;
 
 return [
+    'a_factory' => true,
     'configurator_service' => true,
     'configurator_service_simple' => true,
     'decorated.pif-pouf' => true,
@@ -45,15 +46,7 @@ class getBAR2Service extends ProjectServiceContainer
 }
 
     [Container%s/getBAR22Service.php] => <?php
-
-namespace Container%s;
-
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
-
-/**
- * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
- */
+%A
 class getBAR22Service extends ProjectServiceContainer
 {
     /**
@@ -67,16 +60,38 @@ class getBAR22Service extends ProjectServiceContainer
     }
 }
 
-    [Container%s/getBar23Service.php] => <?php
-
-namespace Container%s;
+    [Container%s/getAServiceService.php] => <?php
+%A
+class getAServiceService extends ProjectServiceContainer
+{
+    /**
+     * Gets the public 'a_service' shared service.
+     *
+     * @return \Bar
+     */
+    public static function do($container, $lazyLoad = true)
+    {
+        return $container->services['a_service'] = ($container->privates['a_factory'] ??= new \Bar())->getBar();
+    }
+}
 
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+    [Container%s/getBServiceService.php] => <?php
+%A
+class getBServiceService extends ProjectServiceContainer
+{
+    /**
+     * Gets the public 'b_service' shared service.
+     *
+     * @return \Bar
+     */
+    public static function do($container, $lazyLoad = true)
+    {
+        return $container->services['b_service'] = ($container->privates['a_factory'] ??= new \Bar())->getBar();
+    }
+}
 
-/**
- * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
- */
+    [Container%s/getBar23Service.php] => <?php
+%A
 class getBar23Service extends ProjectServiceContainer
 {
     /**
@@ -91,15 +106,7 @@ class getBar23Service extends ProjectServiceContainer
 }
 
     [Container%s/getBazService.php] => <?php
-
-namespace Container%s;
-
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
-
-/**
- * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
- */
+%A
 class getBazService extends ProjectServiceContainer
 {
     /**
@@ -118,15 +125,7 @@ class getBazService extends ProjectServiceContainer
 }
 
     [Container%s/getConfiguredServiceService.php] => <?php
-
-namespace Container%s;
-
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
-
-/**
- * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
- */
+%A
 class getConfiguredServiceService extends ProjectServiceContainer
 {
     /**
@@ -148,15 +147,7 @@ class getConfiguredServiceService extends ProjectServiceContainer
 }
 
     [Container%s/getConfiguredServiceSimpleService.php] => <?php
-
-namespace Container%s;
-
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
-
-/**
- * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
- */
+%A
 class getConfiguredServiceSimpleService extends ProjectServiceContainer
 {
     /**
@@ -175,15 +166,7 @@ class getConfiguredServiceSimpleService extends ProjectServiceContainer
 }
 
     [Container%s/getDecoratorServiceService.php] => <?php
-
-namespace Container%s;
-
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
-
-/**
- * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
- */
+%A
 class getDecoratorServiceService extends ProjectServiceContainer
 {
     /**
@@ -198,15 +181,7 @@ class getDecoratorServiceService extends ProjectServiceContainer
 }
 
     [Container%s/getDecoratorServiceWithNameService.php] => <?php
-
-namespace Container%s;
-
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
-
-/**
- * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
- */
+%A
 class getDecoratorServiceWithNameService extends ProjectServiceContainer
 {
     /**
@@ -221,15 +196,7 @@ class getDecoratorServiceWithNameService extends ProjectServiceContainer
 }
 
     [Container%s/getDeprecatedServiceService.php] => <?php
-
-namespace Container%s;
-
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
-
-/**
- * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
- */
+%A
 class getDeprecatedServiceService extends ProjectServiceContainer
 {
     /**
@@ -248,15 +215,7 @@ class getDeprecatedServiceService extends ProjectServiceContainer
 }
 
     [Container%s/getFactoryServiceService.php] => <?php
-
-namespace Container%s;
-
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
-
-/**
- * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
- */
+%A
 class getFactoryServiceService extends ProjectServiceContainer
 {
     /**
@@ -271,15 +230,7 @@ class getFactoryServiceService extends ProjectServiceContainer
 }
 
     [Container%s/getFactoryServiceSimpleService.php] => <?php
-
-namespace Container%s;
-
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
-
-/**
- * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
- */
+%A
 class getFactoryServiceSimpleService extends ProjectServiceContainer
 {
     /**
@@ -294,15 +245,7 @@ class getFactoryServiceSimpleService extends ProjectServiceContainer
 }
 
     [Container%s/getFactorySimpleService.php] => <?php
-
-namespace Container%s;
-
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
-
-/**
- * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
- */
+%A
 class getFactorySimpleService extends ProjectServiceContainer
 {
     /**
@@ -321,15 +264,7 @@ class getFactorySimpleService extends ProjectServiceContainer
 }
 
     [Container%s/getFooService.php] => <?php
-
-namespace Container%s;
-
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
-
-/**
- * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
- */
+%A
 class getFooService extends ProjectServiceContainer
 {
     /**
@@ -355,15 +290,7 @@ class getFooService extends ProjectServiceContainer
 }
 
     [Container%s/getFoo_BazService.php] => <?php
-
-namespace Container%s;
-
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
-
-/**
- * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
- */
+%A
 class getFoo_BazService extends ProjectServiceContainer
 {
     /**
@@ -382,15 +309,7 @@ class getFoo_BazService extends ProjectServiceContainer
 }
 
     [Container%s/getFooBarService.php] => <?php
-
-namespace Container%s;
-
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
-
-/**
- * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
- */
+%A
 class getFooBarService extends ProjectServiceContainer
 {
     /**
@@ -409,15 +328,7 @@ class getFooBarService extends ProjectServiceContainer
 }
 
     [Container%s/getFooWithInlineService.php] => <?php
-
-namespace Container%s;
-
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
-
-/**
- * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
- */
+%A
 class getFooWithInlineService extends ProjectServiceContainer
 {
     /**
@@ -440,15 +351,7 @@ class getFooWithInlineService extends ProjectServiceContainer
 }
 
     [Container%s/getLazyContextService.php] => <?php
-
-namespace Container%s;
-
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
-
-/**
- * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
- */
+%A
 class getLazyContextService extends ProjectServiceContainer
 {
     /**
@@ -468,15 +371,7 @@ class getLazyContextService extends ProjectServiceContainer
 }
 
     [Container%s/getLazyContextIgnoreInvalidRefService.php] => <?php
-
-namespace Container%s;
-
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
-
-/**
- * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
- */
+%A
 class getLazyContextIgnoreInvalidRefService extends ProjectServiceContainer
 {
     /**
@@ -495,15 +390,7 @@ class getLazyContextIgnoreInvalidRefService extends ProjectServiceContainer
 }
 
     [Container%s/getMethodCall1Service.php] => <?php
-
-namespace Container%s;
-
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
-
-/**
- * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
- */
+%A
 class getMethodCall1Service extends ProjectServiceContainer
 {
     /**
@@ -526,15 +413,7 @@ class getMethodCall1Service extends ProjectServiceContainer
 }
 
     [Container%s/getNewFactoryServiceService.php] => <?php
-
-namespace Container%s;
-
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
-
-/**
- * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
- */
+%A
 class getNewFactoryServiceService extends ProjectServiceContainer
 {
     /**
@@ -556,15 +435,7 @@ class getNewFactoryServiceService extends ProjectServiceContainer
 }
 
     [Container%s/getNonSharedFooService.php] => <?php
-
-namespace Container%s;
-
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
-
-/**
- * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
- */
+%A
 class getNonSharedFooService extends ProjectServiceContainer
 {
     /**
@@ -585,15 +456,7 @@ class getNonSharedFooService extends ProjectServiceContainer
 }
 
     [Container%s/getPreloadSidekickService.php] => <?php
-
-namespace Container%s;
-
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
-
-/**
- * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
- */
+%A
 class getPreloadSidekickService extends ProjectServiceContainer
 {
     /**
@@ -608,15 +471,7 @@ class getPreloadSidekickService extends ProjectServiceContainer
 }
 
     [Container%s/getRuntimeErrorService.php] => <?php
-
-namespace Container%s;
-
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
-
-/**
- * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
- */
+%A
 class getRuntimeErrorService extends ProjectServiceContainer
 {
     /**
@@ -631,15 +486,7 @@ class getRuntimeErrorService extends ProjectServiceContainer
 }
 
     [Container%s/getServiceFromStaticMethodService.php] => <?php
-
-namespace Container%s;
-
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
-
-/**
- * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
- */
+%A
 class getServiceFromStaticMethodService extends ProjectServiceContainer
 {
     /**
@@ -654,15 +501,7 @@ class getServiceFromStaticMethodService extends ProjectServiceContainer
 }
 
     [Container%s/getTaggedIteratorService.php] => <?php
-
-namespace Container%s;
-
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
-
-/**
- * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
- */
+%A
 class getTaggedIteratorService extends ProjectServiceContainer
 {
     /**
@@ -674,21 +513,13 @@ class getTaggedIteratorService extends ProjectServiceContainer
     {
         return $container->services['tagged_iterator'] = new \Bar(new RewindableGenerator(function () use ($container) {
             yield 0 => ($container->services['foo'] ?? $container->load('getFooService'));
-            yield 1 => $container->privates['tagged_iterator_foo'] ??= new \Bar();
+            yield 1 => ($container->privates['tagged_iterator_foo'] ??= new \Bar());
         }, 2));
     }
 }
 
     [Container%s/getThrowingOneService.php] => <?php
-
-namespace Container%s;
-
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
-
-/**
- * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
- */
+%A
 class getThrowingOneService extends ProjectServiceContainer
 {
     /**
@@ -742,6 +573,8 @@ class ProjectServiceContainer extends Container
         $this->fileMap = [
             'BAR' => 'getBAR2Service',
             'BAR2' => 'getBAR22Service',
+            'a_service' => 'getAServiceService',
+            'b_service' => 'getBServiceService',
             'bar2' => 'getBar23Service',
             'baz' => 'getBazService',
             'configured_service' => 'getConfiguredServiceService',
@@ -920,14 +753,16 @@ require __DIR__.'/Container%s/getConfiguredServiceSimpleService.php';
 require __DIR__.'/Container%s/getConfiguredServiceService.php';
 require __DIR__.'/Container%s/getBazService.php';
 require __DIR__.'/Container%s/getBar23Service.php';
+require __DIR__.'/Container%s/getBServiceService.php';
+require __DIR__.'/Container%s/getAServiceService.php';
 require __DIR__.'/Container%s/getBAR22Service.php';
 require __DIR__.'/Container%s/getBAR2Service.php';
 
 $classes = [];
+$classes[] = 'Bar';
 $classes[] = 'Bar\FooClass';
 $classes[] = 'Baz';
 $classes[] = 'ConfClass';
-$classes[] = 'Bar';
 $classes[] = 'BazClass';
 $classes[] = 'Foo';
 $classes[] = 'LazyContext';
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_compiled.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_compiled.php
index 5aee165752c9a..a872e1d20e219 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_compiled.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_compiled.php
@@ -27,6 +27,8 @@ public function __construct()
         $this->methodMap = [
             'BAR' => 'getBARService',
             'BAR2' => 'getBAR2Service',
+            'a_service' => 'getAServiceService',
+            'b_service' => 'getBServiceService',
             'bar' => 'getBar3Service',
             'bar2' => 'getBar22Service',
             'baz' => 'getBazService',
@@ -70,6 +72,7 @@ public function isCompiled(): bool
     public function getRemovedIds(): array
     {
         return [
+            'a_factory' => true,
             'configurator_service' => true,
             'configurator_service_simple' => true,
             'decorated.pif-pouf' => true,
@@ -106,6 +109,26 @@ protected function getBAR2Service()
         return $this->services['BAR2'] = new \stdClass();
     }
 
+    /**
+     * Gets the public 'a_service' shared service.
+     *
+     * @return \Bar
+     */
+    protected function getAServiceService()
+    {
+        return $this->services['a_service'] = ($this->privates['a_factory'] ??= new \Bar())->getBar();
+    }
+
+    /**
+     * Gets the public 'b_service' shared service.
+     *
+     * @return \Bar
+     */
+    protected function getBServiceService()
+    {
+        return $this->services['b_service'] = ($this->privates['a_factory'] ??= new \Bar())->getBar();
+    }
+
     /**
      * Gets the public 'bar' shared service.
      *
@@ -401,7 +424,7 @@ protected function getTaggedIteratorService()
     {
         return $this->services['tagged_iterator'] = new \Bar(new RewindableGenerator(function () {
             yield 0 => ($this->services['foo'] ?? $this->getFooService());
-            yield 1 => $this->privates['tagged_iterator_foo'] ??= new \Bar();
+            yield 1 => ($this->privates['tagged_iterator_foo'] ??= new \Bar());
         }, 2));
     }
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_inlined_factories.txt b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_inlined_factories.txt
index 3dc4cfa266cf1..930ad979f46c5 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_inlined_factories.txt
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_inlined_factories.txt
@@ -5,6 +5,7 @@ Array
 namespace Container%s;
 
 return [
+    'a_factory' => true,
     'configurator_service' => true,
     'configurator_service_simple' => true,
     'decorated.pif-pouf' => true,
@@ -54,6 +55,8 @@ class ProjectServiceContainer extends Container
         $this->methodMap = [
             'BAR' => 'getBARService',
             'BAR2' => 'getBAR2Service',
+            'a_service' => 'getAServiceService',
+            'b_service' => 'getBServiceService',
             'bar' => 'getBar3Service',
             'bar2' => 'getBar22Service',
             'baz' => 'getBazService',
@@ -129,6 +132,26 @@ class ProjectServiceContainer extends Container
         return $this->services['BAR2'] = new \stdClass();
     }
 
+    /**
+     * Gets the public 'a_service' shared service.
+     *
+     * @return \Bar
+     */
+    protected function getAServiceService()
+    {
+        return $this->services['a_service'] = ($this->privates['a_factory'] ??= new \Bar())->getBar();
+    }
+
+    /**
+     * Gets the public 'b_service' shared service.
+     *
+     * @return \Bar
+     */
+    protected function getBServiceService()
+    {
+        return $this->services['b_service'] = ($this->privates['a_factory'] ??= new \Bar())->getBar();
+    }
+
     /**
      * Gets the public 'bar' shared service.
      *
@@ -446,7 +469,7 @@ class ProjectServiceContainer extends Container
     {
         return $this->services['tagged_iterator'] = new \Bar(new RewindableGenerator(function () {
             yield 0 => ($this->services['foo'] ?? $this->getFooService());
-            yield 1 => $this->privates['tagged_iterator_foo'] ??= new \Bar();
+            yield 1 => ($this->privates['tagged_iterator_foo'] ??= new \Bar());
         }, 2));
     }
 
@@ -555,10 +578,10 @@ require dirname(__DIR__, %d).'%svendor/autoload.php';
 (require __DIR__.'/ProjectServiceContainer.php')->set(\Container%s\ProjectServiceContainer::class, null);
 
 $classes = [];
+$classes[] = 'Bar';
 $classes[] = 'Bar\FooClass';
 $classes[] = 'Baz';
 $classes[] = 'ConfClass';
-$classes[] = 'Bar';
 $classes[] = 'BazClass';
 $classes[] = 'Foo';
 $classes[] = 'LazyContext';
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_almost_circular_public.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_almost_circular_public.php
index f80c7ecf042da..a81fd8b5ee0ea 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_almost_circular_public.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_almost_circular_public.php
@@ -122,7 +122,7 @@ protected function getBar3Service()
     {
         $this->services['bar3'] = $instance = new \BarCircular();
 
-        $a = $this->services['foobar3'] ??= new \FoobarCircular();
+        $a = ($this->services['foobar3'] ??= new \FoobarCircular());
 
         $instance->addFoobar($a, $a);
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_closure_argument_compiled.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_closure_argument_compiled.php
index 8809803a3e978..d6e186f8ebb10 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_closure_argument_compiled.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_closure_argument_compiled.php
@@ -56,7 +56,7 @@ protected function getFooService()
     protected function getServiceClosureService()
     {
         return $this->services['service_closure'] = new \Bar(#[\Closure(name: 'foo', class: 'Foo')] function () {
-            return $this->services['foo'] ??= new \Foo();
+            return ($this->services['foo'] ??= new \Foo());
         });
     }
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_env_in_id.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_env_in_id.php
index ac337463aaca1..91da01032862a 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_env_in_id.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_env_in_id.php
@@ -54,7 +54,7 @@ public function getRemovedIds(): array
      */
     protected function getBarService()
     {
-        return $this->services['bar'] = new \stdClass($this->privates['bar_%env(BAR)%'] ??= new \stdClass());
+        return $this->services['bar'] = new \stdClass(($this->privates['bar_%env(BAR)%'] ??= new \stdClass()));
     }
 
     /**
@@ -64,7 +64,7 @@ protected function getBarService()
      */
     protected function getFooService()
     {
-        return $this->services['foo'] = new \stdClass($this->privates['bar_%env(BAR)%'] ??= new \stdClass(), ['baz_'.$this->getEnv('string:BAR') => new \stdClass()]);
+        return $this->services['foo'] = new \stdClass(($this->privates['bar_%env(BAR)%'] ??= new \stdClass()), ['baz_'.$this->getEnv('string:BAR') => new \stdClass()]);
     }
 
     public function getParameter(string $name): array|bool|string|int|float|\UnitEnum|null
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_errored_definition.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_errored_definition.php
index 39dd94157aa65..5eeafa3cd0778 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_errored_definition.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_errored_definition.php
@@ -27,6 +27,8 @@ public function __construct()
         $this->methodMap = [
             'BAR' => 'getBARService',
             'BAR2' => 'getBAR2Service',
+            'a_service' => 'getAServiceService',
+            'b_service' => 'getBServiceService',
             'bar' => 'getBar3Service',
             'bar2' => 'getBar22Service',
             'baz' => 'getBazService',
@@ -70,6 +72,7 @@ public function isCompiled(): bool
     public function getRemovedIds(): array
     {
         return [
+            'a_factory' => true,
             'configurator_service' => true,
             'configurator_service_simple' => true,
             'decorated.pif-pouf' => true,
@@ -106,6 +109,26 @@ protected function getBAR2Service()
         return $this->services['BAR2'] = new \stdClass();
     }
 
+    /**
+     * Gets the public 'a_service' shared service.
+     *
+     * @return \Bar
+     */
+    protected function getAServiceService()
+    {
+        return $this->services['a_service'] = ($this->privates['a_factory'] ??= new \Bar())->getBar();
+    }
+
+    /**
+     * Gets the public 'b_service' shared service.
+     *
+     * @return \Bar
+     */
+    protected function getBServiceService()
+    {
+        return $this->services['b_service'] = ($this->privates['a_factory'] ??= new \Bar())->getBar();
+    }
+
     /**
      * Gets the public 'bar' shared service.
      *
@@ -401,7 +424,7 @@ protected function getTaggedIteratorService()
     {
         return $this->services['tagged_iterator'] = new \Bar(new RewindableGenerator(function () {
             yield 0 => ($this->services['foo'] ?? $this->getFooService());
-            yield 1 => $this->privates['tagged_iterator_foo'] ??= new \Bar();
+            yield 1 => ($this->privates['tagged_iterator_foo'] ??= new \Bar());
         }, 2));
     }
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_locator.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_locator.php
index 27232f650a261..bfabae15405b0 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_locator.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_locator.php
@@ -60,7 +60,7 @@ public function getRemovedIds(): array
      */
     protected function getBarServiceService()
     {
-        return $this->services['bar_service'] = new \stdClass($this->privates['baz_service'] ??= new \stdClass());
+        return $this->services['bar_service'] = new \stdClass(($this->privates['baz_service'] ??= new \stdClass()));
     }
 
     /**
@@ -73,7 +73,7 @@ protected function getFooServiceService()
         return $this->services['foo_service'] = new \Symfony\Component\DependencyInjection\ServiceLocator(['bar' => #[\Closure(name: 'bar_service', class: 'stdClass')] function () {
             return ($this->services['bar_service'] ?? $this->getBarServiceService());
         }, 'baz' => #[\Closure(name: 'baz_service', class: 'stdClass')] function (): \stdClass {
-            return $this->privates['baz_service'] ??= new \stdClass();
+            return ($this->privates['baz_service'] ??= new \stdClass());
         }, 'nil' => function () {
             return NULL;
         }]);
@@ -117,7 +117,7 @@ protected function getTranslator_Loader3Service()
     protected function getTranslator1Service()
     {
         return $this->services['translator_1'] = new \Symfony\Component\DependencyInjection\Tests\Fixtures\StubbedTranslator(new \Symfony\Component\DependencyInjection\ServiceLocator(['translator.loader_1' => #[\Closure(name: 'translator.loader_1', class: 'stdClass')] function () {
-            return $this->services['translator.loader_1'] ??= new \stdClass();
+            return ($this->services['translator.loader_1'] ??= new \stdClass());
         }]));
     }
 
@@ -129,10 +129,10 @@ protected function getTranslator1Service()
     protected function getTranslator2Service()
     {
         $this->services['translator_2'] = $instance = new \Symfony\Component\DependencyInjection\Tests\Fixtures\StubbedTranslator(new \Symfony\Component\DependencyInjection\ServiceLocator(['translator.loader_2' => #[\Closure(name: 'translator.loader_2', class: 'stdClass')] function () {
-            return $this->services['translator.loader_2'] ??= new \stdClass();
+            return ($this->services['translator.loader_2'] ??= new \stdClass());
         }]));
 
-        $instance->addResource('db', $this->services['translator.loader_2'] ??= new \stdClass(), 'nl');
+        $instance->addResource('db', ($this->services['translator.loader_2'] ??= new \stdClass()), 'nl');
 
         return $instance;
     }
@@ -145,10 +145,10 @@ protected function getTranslator2Service()
     protected function getTranslator3Service()
     {
         $this->services['translator_3'] = $instance = new \Symfony\Component\DependencyInjection\Tests\Fixtures\StubbedTranslator(new \Symfony\Component\DependencyInjection\ServiceLocator(['translator.loader_3' => #[\Closure(name: 'translator.loader_3', class: 'stdClass')] function () {
-            return $this->services['translator.loader_3'] ??= new \stdClass();
+            return ($this->services['translator.loader_3'] ??= new \stdClass());
         }]));
 
-        $a = $this->services['translator.loader_3'] ??= new \stdClass();
+        $a = ($this->services['translator.loader_3'] ??= new \stdClass());
 
         $instance->addResource('db', $a, 'nl');
         $instance->addResource('db', $a, 'en');
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_private_frozen.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_private_frozen.php
index 4014b23da709b..c1fec3424eecd 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_private_frozen.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_private_frozen.php
@@ -51,7 +51,7 @@ public function getRemovedIds(): array
      */
     protected function getBarServiceService()
     {
-        return $this->services['bar_service'] = new \stdClass($this->privates['baz_service'] ??= new \stdClass());
+        return $this->services['bar_service'] = new \stdClass(($this->privates['baz_service'] ??= new \stdClass()));
     }
 
     /**
@@ -61,6 +61,6 @@ protected function getBarServiceService()
      */
     protected function getFooServiceService()
     {
-        return $this->services['foo_service'] = new \stdClass($this->privates['baz_service'] ??= new \stdClass());
+        return $this->services['foo_service'] = new \stdClass(($this->privates['baz_service'] ??= new \stdClass()));
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_uninitialized_ref.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_uninitialized_ref.php
index aa75ae83d74c0..8b0b7071259ec 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_uninitialized_ref.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_uninitialized_ref.php
@@ -91,7 +91,7 @@ protected function getBazService()
     {
         $this->services['baz'] = $instance = new \stdClass();
 
-        $instance->foo3 = $this->privates['foo3'] ??= new \stdClass();
+        $instance->foo3 = ($this->privates['foo3'] ??= new \stdClass());
 
         return $instance;
     }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/xml/services9.xml b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/xml/services9.xml
index f59838396fb0b..24f025f523f7d 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/xml/services9.xml
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/xml/services9.xml
@@ -154,6 +154,13 @@
       <tag name="container.preload" class="Some\Sidekick1"/>
       <tag name="container.preload" class="Some\Sidekick2"/>
     </service>
+    <service id="a_factory" class="Bar"/>
+    <service id="a_service" class="Bar" public="true">
+      <factory service="a_factory" method="getBar"/>
+    </service>
+    <service id="b_service" class="Bar" public="true">
+      <factory service="a_factory" method="getBar"/>
+    </service>
     <service id="alias_for_foo" alias="foo" public="true"/>
     <service id="alias_for_alias" alias="foo" public="true"/>
   </services>
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/yaml/services9.yml b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/yaml/services9.yml
index 3f8446f682bdf..8fa97f4f685ab 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/yaml/services9.yml
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/yaml/services9.yml
@@ -179,3 +179,13 @@ services:
             - container.preload: { class: 'Some\Sidekick1' }
             - container.preload: { class: 'Some\Sidekick2' }
         public: true
+    a_factory:
+        class: Bar
+    a_service:
+        class: Bar
+        factory: ['@a_factory', 'getBar']
+        public: true
+    b_service:
+        class: Bar
+        factory: ['@a_factory', 'getBar']
+        public: true