Better check whether the translator is supported.

Author: SanderVerkuil

src/Translator/src/DependencyInjection/TranslatorCompilerPass.php

@@ -6,13 +6,27 @@
 
 use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\Translation\TranslatorBagInterface;
 
 class TranslatorCompilerPass implements CompilerPassInterface
 {
     public function process(ContainerBuilder $container)
     {
-        if (!$container->hasDefinition('translator')) {
+        if (!$this->hasValidTranslator($container)) {
             $container->removeDefinition('ux.translator.cache_warmer.translations_cache_warmer');
         }
     }
+
+    private function hasValidTranslator(ContainerBuilder $containerBuilder): bool
+    {
+        if (!$containerBuilder->hasDefinition('translator')) {
+            return false;
+        }
+
+        $translator = $containerBuilder->getDefinition('translator');
+        if (!is_subclass_of($translator->getClass(), TranslatorBagInterface::class)) {
+            return false;
+        }
+        return true;
+    }
 }