From 1054fd2523913e59e980553b5411a22f16ecf817 Mon Sep 17 00:00:00 2001
From: Taylor Otwell <taylor@laravel.com>
Date: Wed, 25 Jan 2017 07:26:42 -0600
Subject: [PATCH] fix bug with pushMiddleware

---
 src/Illuminate/Routing/Router.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/Illuminate/Routing/Router.php b/src/Illuminate/Routing/Router.php
index a3709ebd155e..78bc59604a03 100644
--- a/src/Illuminate/Routing/Router.php
+++ b/src/Illuminate/Routing/Router.php
@@ -724,7 +724,11 @@ public function prependMiddlewareToGroup($group, $middleware)
      */
     public function pushMiddlewareToGroup($group, $middleware)
     {
-        if (isset($this->middlewareGroups[$group]) && ! in_array($middleware, $this->middlewareGroups[$group])) {
+        if (! array_key_exists($group, $this->middlewareGroups)) {
+            $this->middlewareGroups[$group] = [];
+        }
+
+        if ( ! in_array($middleware, $this->middlewareGroups[$group])) {
             $this->middlewareGroups[$group][] = $middleware;
         }