Merge branch '4.4' into 5.3

* 4.4:
  Tweak bug report template
  Prevent infinite nesting of lazy `ObjectManager` instances when `ObjectManager` is reset

Author: fabpot

ManagerRegistry.php

@@ -59,7 +59,7 @@ function (&$wrappedInstance, LazyLoadingInterface $manager) use ($name) {
                     $name = $this->aliases[$name];
                 }
                 if (isset($this->fileMap[$name])) {
-                    $wrappedInstance = $this->load($this->fileMap[$name]);
+                    $wrappedInstance = $this->load($this->fileMap[$name], false);
                 } else {
                     $wrappedInstance = $this->{$this->methodMap[$name]}(false);
                 }

Tests/ManagerRegistryTest.php

@@ -12,8 +12,15 @@
 namespace Symfony\Bridge\Doctrine\Tests;
 
 use PHPUnit\Framework\TestCase;
+use ProxyManager\Proxy\LazyLoadingInterface;
+use ProxyManager\Proxy\ValueHolderInterface;
 use Symfony\Bridge\Doctrine\ManagerRegistry;
+use Symfony\Bridge\ProxyManager\LazyProxy\PhpDumper\ProxyDumper;
 use Symfony\Bridge\ProxyManager\Tests\LazyProxy\Dumper\PhpDumperTest;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Dumper\PhpDumper;
+use Symfony\Component\Filesystem\Filesystem;
 
 class ManagerRegistryTest extends TestCase
 {
@@ -39,6 +46,92 @@ public function testResetService()
         $this->assertSame($foo, $container->get('foo'));
         $this->assertObjectNotHasAttribute('bar', $foo);
     }
+
+    /**
+     * When performing an entity manager lazy service reset, the reset operations may re-use the container
+     * to create a "fresh" service: when doing so, it can happen that the "fresh" service is itself a proxy.
+     *
+     * Because of that, the proxy will be populated with a wrapped value that is itself a proxy: repeating
+     * the reset operation keeps increasing this nesting until the application eventually runs into stack
+     * overflow or memory overflow operations, which can happen for long-running processes that rely on
+     * services that are reset very often.
+     */
+    public function testResetServiceWillNotNestFurtherLazyServicesWithinEachOther()
+    {
+        // This test scenario only applies to containers composed as a set of generated sources
+        $this->dumpLazyServiceProjectAsFilesServiceContainer();
+
+        /** @var ContainerInterface $container */
+        $container = new \LazyServiceProjectAsFilesServiceContainer();
+
+        $registry = new TestManagerRegistry(
+            'irrelevant',
+            [],
+            ['defaultManager' => 'foo'],
+            'irrelevant',
+            'defaultManager',
+            'irrelevant'
+        );
+        $registry->setTestContainer($container);
+
+        $service = $container->get('foo');
+
+        self::assertInstanceOf(\stdClass::class, $service);
+        self::assertInstanceOf(LazyLoadingInterface::class, $service);
+        self::assertInstanceOf(ValueHolderInterface::class, $service);
+        self::assertFalse($service->isProxyInitialized());
+
+        $service->initializeProxy();
+
+        self::assertTrue($container->initialized('foo'));
+        self::assertTrue($service->isProxyInitialized());
+
+        $registry->resetManager();
+        $service->initializeProxy();
+
+        $wrappedValue = $service->getWrappedValueHolderValue();
+        self::assertInstanceOf(\stdClass::class, $wrappedValue);
+        self::assertNotInstanceOf(LazyLoadingInterface::class, $wrappedValue);
+        self::assertNotInstanceOf(ValueHolderInterface::class, $wrappedValue);
+    }
+
+    /** @return void */
+    private function dumpLazyServiceProjectAsFilesServiceContainer()
+    {
+        if (class_exists(\LazyServiceProjectAsFilesServiceContainer::class, false)) {
+            return;
+        }
+
+        $container = new ContainerBuilder();
+
+        $container->register('foo', \stdClass::class)
+            ->setPublic(true)
+            ->setLazy(true);
+        $container->compile();
+
+        $fileSystem = new Filesystem();
+
+        $temporaryPath = $fileSystem->tempnam(sys_get_temp_dir(), 'symfonyManagerRegistryTest');
+        $fileSystem->remove($temporaryPath);
+        $fileSystem->mkdir($temporaryPath);
+
+        $dumper = new PhpDumper($container);
+
+        $dumper->setProxyDumper(new ProxyDumper());
+        $containerFiles = $dumper->dump([
+            'class' => 'LazyServiceProjectAsFilesServiceContainer',
+            'as_files' => true,
+        ]);
+
+        array_walk(
+            $containerFiles,
+            static function (string $containerSources, string $fileName) use ($temporaryPath): void {
+                (new Filesystem())->dumpFile($temporaryPath.'/'.$fileName, $containerSources);
+            }
+        );
+
+        require $temporaryPath.'/LazyServiceProjectAsFilesServiceContainer.php';
+    }
 }
 
 class TestManagerRegistry extends ManagerRegistry