From b61820eb4b7b2cf768edf67d0f78f4a34f891aea Mon Sep 17 00:00:00 2001
From: Sander Marechal <sander@prezent.nl>
Date: Thu, 10 Aug 2017 12:16:50 +0200
Subject: [PATCH] Fix fatal error when using a Constraint as requirement

---
 RouteDescriber/FosRestDescriber.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/RouteDescriber/FosRestDescriber.php b/RouteDescriber/FosRestDescriber.php
index 4a6e8f9..1a4615f 100644
--- a/RouteDescriber/FosRestDescriber.php
+++ b/RouteDescriber/FosRestDescriber.php
@@ -63,7 +63,7 @@ final class FosRestDescriber implements RouteDescriberInterface
     private function normalizeRequirements($requirements)
     {
         // if pattern
-        if (isset($requirements['rule'])) {
+        if (is_array($requirements) && isset($requirements['rule'])) {
             return (string) $requirements['rule'];
         }
         if (is_string($requirements)) {