From b90ca2eeaf3e94a962e242498a8af28b537029ae Mon Sep 17 00:00:00 2001
From: crynobone <crynobone@gmail.com>
Date: Thu, 21 Jul 2016 19:59:18 +0800
Subject: [PATCH] [5.2] Avoid introducing breaking backward compatibility on
 patch release.

Closes #14396

Signed-off-by: crynobone <crynobone@gmail.com>
---
 src/Illuminate/Support/MessageBag.php   | 4 ++++
 tests/Support/SupportMessageBagTest.php | 1 +
 2 files changed, 5 insertions(+)

diff --git a/src/Illuminate/Support/MessageBag.php b/src/Illuminate/Support/MessageBag.php
index ad422ebdb56a..575b8d1937b9 100755
--- a/src/Illuminate/Support/MessageBag.php
+++ b/src/Illuminate/Support/MessageBag.php
@@ -103,6 +103,10 @@ protected function isUnique($key, $message)
      */
     public function has($key = null)
     {
+        if (is_null($key)) {
+            return $this->any();
+        }
+
         $keys = is_array($key) ? $key : func_get_args();
 
         foreach ($keys as $key) {
diff --git a/tests/Support/SupportMessageBagTest.php b/tests/Support/SupportMessageBagTest.php
index 45611a2dfa96..7536c93b0ab6 100755
--- a/tests/Support/SupportMessageBagTest.php
+++ b/tests/Support/SupportMessageBagTest.php
@@ -72,6 +72,7 @@ public function testHasIndicatesExistence()
         $container->add('foo', 'bar');
         $this->assertTrue($container->has('foo'));
         $this->assertFalse($container->has('bar'));
+        $this->assertTrue($container->has());
     }
 
     public function testHasAnyIndicatesExistence()