fix merge

Author: chalasr

Legacy/SymfonyTestsListenerTrait.php

@@ -280,7 +280,7 @@ public function endTest($test, $time)
             unlink($this->runsInSeparateProcess);
             putenv('SYMFONY_DEPRECATIONS_SERIALIZE');
             foreach ($deprecations ? unserialize($deprecations) : [] as $deprecation) {
-                $error = serialize(['deprecation' => $deprecation[1], 'class' => $className, 'method' => $test->getName(false), 'triggering_file' => $deprecation[2] ?? null], 'files_stack' => $deprecation[3] ?? []]);
+                $error = serialize(['deprecation' => $deprecation[1], 'class' => $className, 'method' => $test->getName(false), 'triggering_file' => $deprecation[2] ?? null, 'files_stack' => $deprecation[3] ?? []]);
                 if ($deprecation[0]) {
                     // unsilenced on purpose
                     trigger_error($error, \E_USER_DEPRECATED);