[FrameworkBundle][WebProfilerBundle] Don't pass null to string parameters

Signed-off-by: Alexander M. Turek <me@derrabus.de>

Author: derrabus

Console/Descriptor/XmlDescriptor.php

@@ -285,7 +285,7 @@ private function getContainerDefinitionDocument(Definition $definition, string $
             $descriptionXML->appendChild($dom->createCDATASection($classDescription));
         }
 
-        $serviceXML->setAttribute('class', $definition->getClass());
+        $serviceXML->setAttribute('class', $definition->getClass() ?? '');
 
         if ($factory = $definition->getFactory()) {
             $serviceXML->appendChild($factoryXML = $dom->createElement('factory'));
@@ -311,7 +311,7 @@ private function getContainerDefinitionDocument(Definition $definition, string $
         $serviceXML->setAttribute('abstract', $definition->isAbstract() ? 'true' : 'false');
         $serviceXML->setAttribute('autowired', $definition->isAutowired() ? 'true' : 'false');
         $serviceXML->setAttribute('autoconfigured', $definition->isAutoconfigured() ? 'true' : 'false');
-        $serviceXML->setAttribute('file', $definition->getFile());
+        $serviceXML->setAttribute('file', $definition->getFile() ?? '');
 
         $calls = $definition->getMethodCalls();
         if (\count($calls) > 0) {

Tests/Kernel/ConcreteMicroKernel.php

@@ -76,8 +76,10 @@ public function __wakeup()
 
     public function __destruct()
     {
-        $fs = new Filesystem();
-        $fs->remove($this->cacheDir);
+        if ($this->cacheDir) {
+            $fs = new Filesystem();
+            $fs->remove($this->cacheDir);
+        }
     }
 
     protected function configureRoutes(RouteCollectionBuilder $routes)