Fix reporting unsilenced deprecations from insulated tests

Author: nicolas-grekas

Legacy/SymfonyTestsListenerTrait.php

@@ -284,7 +284,8 @@ public function endTest($test, $time)
             foreach ($deprecations ? unserialize($deprecations) : array() as $deprecation) {
                 $error = serialize(array('deprecation' => $deprecation[1], 'class' => $className, 'method' => $test->getName(false), 'triggering_file' => isset($deprecation[2]) ? $deprecation[2] : null));
                 if ($deprecation[0]) {
-                    @trigger_error($error, E_USER_DEPRECATED);
+                    // unsilenced on purpose
+                    trigger_error($error, E_USER_DEPRECATED);
                 } else {
                     @trigger_error($error, E_USER_DEPRECATED);
                 }