diff --git a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
index e8096e537b..a73eb14065 100644
--- a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
+++ b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
@@ -1587,6 +1587,13 @@ EOF;
             return $dirname;
         }
 
+        if (is_string($value) && false !== strpos($value, "\n")) {
+            $cleanParts = explode("\n", $value);
+            $cleanParts = array_map(function ($part) { return var_export($part, true); }, $cleanParts);
+
+            return implode('."\n".', $cleanParts);
+        }
+
         return var_export($value, true);
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php b/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
index 6a6fb015bf..d59106fc3a 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
@@ -55,6 +55,7 @@ class PhpDumperTest extends TestCase
             'optimize concatenation with empty string' => 'string1%empty_value%string2',
             'optimize concatenation from the start' => '%empty_value%start',
             'optimize concatenation at the end' => 'end%empty_value%',
+            'new line' => "string with \nnew line",
         ));
 
         $container = new ContainerBuilder();
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services10.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services10.php
index a674eae8b4..6538f0ae53 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services10.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services10.php
@@ -56,7 +56,7 @@ class ProjectServiceContainer extends Container
      */
     protected function getTestService()
     {
-        return $this->services['test'] = new \stdClass(array('only dot' => '.', 'concatenation as value' => '.\'\'.', 'concatenation from the start value' => '\'\'.', '.' => 'dot as a key', '.\'\'.' => 'concatenation as a key', '\'\'.' => 'concatenation from the start key', 'optimize concatenation' => 'string1-string2', 'optimize concatenation with empty string' => 'string1string2', 'optimize concatenation from the start' => 'start', 'optimize concatenation at the end' => 'end'));
+        return $this->services['test'] = new \stdClass(array('only dot' => '.', 'concatenation as value' => '.\'\'.', 'concatenation from the start value' => '\'\'.', '.' => 'dot as a key', '.\'\'.' => 'concatenation as a key', '\'\'.' => 'concatenation from the start key', 'optimize concatenation' => 'string1-string2', 'optimize concatenation with empty string' => 'string1string2', 'optimize concatenation from the start' => 'start', 'optimize concatenation at the end' => 'end', 'new line' => 'string with '."\n".'new line'));
     }
 
     /**
diff --git a/src/Symfony/Component/HttpFoundation/IpUtils.php b/src/Symfony/Component/HttpFoundation/IpUtils.php
index dc6d3ec818..3bb33140f5 100644
--- a/src/Symfony/Component/HttpFoundation/IpUtils.php
+++ b/src/Symfony/Component/HttpFoundation/IpUtils.php
@@ -87,6 +87,10 @@ class IpUtils
             $netmask = 32;
         }
 
+        if (false === ip2long($address)) {
+            return self::$checkedIps[$cacheKey] = false;
+        }
+
         return self::$checkedIps[$cacheKey] = 0 === substr_compare(sprintf('%032b', ip2long($requestIp)), sprintf('%032b', ip2long($address)), 0, $netmask);
     }
 
diff --git a/src/Symfony/Component/HttpFoundation/Tests/IpUtilsTest.php b/src/Symfony/Component/HttpFoundation/Tests/IpUtilsTest.php
index 297ee3d8d3..54cbb5c206 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/IpUtilsTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/IpUtilsTest.php
@@ -82,4 +82,21 @@ class IpUtilsTest extends TestCase
 
         IpUtils::checkIp('2a01:198:603:0:396e:4789:8e99:890f', '2a01:198:603:0::/65');
     }
+
+    /**
+     * @dataProvider invalidIpAddressData
+     */
+    public function testInvalidIpAddressesDoNotMatch($requestIp, $proxyIp)
+    {
+        $this->assertFalse(IpUtils::checkIp4($requestIp, $proxyIp));
+    }
+
+    public function invalidIpAddressData()
+    {
+        return array(
+            'invalid proxy wildcard' => array('192.168.20.13', '*'),
+            'invalid proxy missing netmask' => array('192.168.20.13', '0.0.0.0'),
+            'invalid request IP with invalid proxy wildcard' => array('0.0.0.0', '*'),
+        );
+    }
 }
diff --git a/src/Symfony/Component/Translation/Tests/TranslatorTest.php b/src/Symfony/Component/Translation/Tests/TranslatorTest.php
index 60f161f625..9efedb3fe0 100644
--- a/src/Symfony/Component/Translation/Tests/TranslatorTest.php
+++ b/src/Symfony/Component/Translation/Tests/TranslatorTest.php
@@ -25,7 +25,7 @@ class TranslatorTest extends TestCase
      */
     public function testConstructorInvalidLocale($locale)
     {
-        $translator = new Translator($locale, new MessageSelector());
+        new Translator($locale, new MessageSelector());
     }
 
     /**
diff --git a/src/Symfony/Component/Validator/Constraints/File.php b/src/Symfony/Component/Validator/Constraints/File.php
index c4147f8537..c00ece3e3d 100644
--- a/src/Symfony/Component/Validator/Constraints/File.php
+++ b/src/Symfony/Component/Validator/Constraints/File.php
@@ -88,6 +88,15 @@ class File extends Constraint
         return parent::__get($option);
     }
 
+    public function __isset($option)
+    {
+        if ('maxSize' === $option) {
+            return true;
+        }
+
+        return parent::__isset($option);
+    }
+
     private function normalizeBinaryFormat($maxSize)
     {
         $sizeInt = (int) $maxSize;