bug #25160 [DI] Prevent a ReflectionException during cache:clear when…

… the parent class doesn't exist (dunglas)

This PR was squashed before being merged into the 3.4 branch (closes #25160).

Discussion
----------

[DI] Prevent a ReflectionException during cache:clear when the parent class doesn't exist

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | yes
| New feature?  |  no <!-- don't forget to update src/**/CHANGELOG.md files -->
| BC breaks?    | no
| Deprecations? | no <!-- don't forget to update UPGRADE-*.md files -->
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

Currently, if you just run the following commands:

```
composer create-project -s beta symfony/skeleton:^3.4 test
composer req orm
```

You get the following error:

```
In UniqueEntityValidator.php line 27:

  [ReflectionException]
  Class Symfony\Component\Validator\ConstraintValidator not found
```

`UniqueEntityValidator` is in the bridge, but it's parent class is in the validator (that is not installed by default). The hot path optimization feature (enabled by default) uses reflection, and the reflection API throws an exception in this specific case.

This PR fixes the error.

Commits
-------

6e622c6 [DI] Prevent a ReflectionException during cache:clear when the parent class doesn't exist

src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php

@@ -378,7 +378,7 @@ private function collectLineage($class, array &$lineage)
         if (isset($lineage[$class])) {
             return;
         }
-        if (!$r = $this->container->getReflectionClass($class)) {
+        if (!$r = $this->container->getReflectionClass($class, false)) {
             return;
         }
         if ($this->container instanceof $class) {

src/Symfony/Component/DependencyInjection/Tests/Fixtures/ParentNotExists.php

@@ -0,0 +1,7 @@
+<?php
+
+namespace Symfony\Component\DependencyInjection\Tests\Fixtures;
+
+class ParentNotExists extends \NotExists
+{
+}

src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container_inline_requires.php

@@ -7,11 +7,13 @@
 use Symfony\Component\DependencyInjection\Dumper\PhpDumper;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\includes\HotPath;
+use Symfony\Component\DependencyInjection\Tests\Fixtures\ParentNotExists;
 
 $container = new ContainerBuilder();
 
 $container->register(HotPath\C1::class)->addTag('container.hot_path')->setPublic(true);
 $container->register(HotPath\C2::class)->addArgument(new Reference(HotPath\C3::class))->setPublic(true);
 $container->register(HotPath\C3::class);
+$container->register(ParentNotExists::class)->setPublic(true);
 
 return $container;

src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/container_inline_requires.php

@@ -32,8 +32,10 @@ public function __construct()
             'symfony\\component\\dependencyinjection\\tests\\fixtures\\includes\\hotpath\\c1' => 'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\includes\\HotPath\\C1',
             'symfony\\component\\dependencyinjection\\tests\\fixtures\\includes\\hotpath\\c2' => 'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\includes\\HotPath\\C2',
             'symfony\\component\\dependencyinjection\\tests\\fixtures\\includes\\hotpath\\c3' => 'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\includes\\HotPath\\C3',
+            'symfony\\component\\dependencyinjection\\tests\\fixtures\\parentnotexists' => 'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\ParentNotExists',
         );
         $this->methodMap = array(
+            'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\ParentNotExists' => 'getParentNotExistsService',
             'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\includes\\HotPath\\C1' => 'getC1Service',
             'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\includes\\HotPath\\C2' => 'getC2Service',
             'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\includes\\HotPath\\C3' => 'getC3Service',
@@ -75,6 +77,16 @@ public function isFrozen()
         return true;
     }
 
+    /**
+     * Gets the public 'Symfony\Component\DependencyInjection\Tests\Fixtures\ParentNotExists' shared service.
+     *
+     * @return \Symfony\Component\DependencyInjection\Tests\Fixtures\ParentNotExists
+     */
+    protected function getParentNotExistsService()
+    {
+        return $this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\ParentNotExists'] = new \Symfony\Component\DependencyInjection\Tests\Fixtures\ParentNotExists();
+    }
+
     /**
      * Gets the public 'Symfony\Component\DependencyInjection\Tests\Fixtures\includes\HotPath\C1' shared service.
      *