fix regression when extending the Container class without a constructor

regression introduced in symfony/symfony@c026ec6#diff-f7b23d463cba27ac5e4cb677f2be7623R985

Author: lsmith77

Dumper/PhpDumper.php

@@ -981,9 +981,13 @@ public function __construct()
         if ($this->container->isCompiled()) {
             if (Container::class !== $baseClassWithNamespace) {
                 $r = $this->container->getReflectionClass($baseClassWithNamespace, false);
-
-                if (null !== $r && (null !== $constructor = $r->getConstructor()) && 0 === $constructor->getNumberOfRequiredParameters()) {
-                    $code .= "        parent::__construct();\n\n";
+                if (null !== $r
+                    && (null !== $constructor = $r->getConstructor())
+                    && 0 === $constructor->getNumberOfRequiredParameters()
+                    && Container::class !== $constructor->getDeclaringClass()->name
+                ) {
+                    $code .= "        parent::__construct();\n";
+                    $code .= "        \$this->parameterBag = null;\n\n";
                 }
             }
 

Tests/Fixtures/Container/NoConstructorContainer.php

@@ -2,6 +2,8 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Fixtures\Container;
 
-class NoConstructorContainer
+use Symfony\Component\DependencyInjection\Container;
+
+class NoConstructorContainer extends Container
 {
 }

Tests/Fixtures/php/custom_container_class_constructor_without_arguments.php

@@ -24,6 +24,7 @@ class ProjectServiceContainer extends \Symfony\Component\DependencyInjection\Tes
     public function __construct()
     {
         parent::__construct();
+        $this->parameterBag = null;
 
         $this->services = array();
 

Tests/Fixtures/php/custom_container_class_with_optional_constructor_arguments.php

@@ -24,6 +24,7 @@ class ProjectServiceContainer extends \Symfony\Component\DependencyInjection\Tes
     public function __construct()
     {
         parent::__construct();
+        $this->parameterBag = null;
 
         $this->services = array();