diff --git a/.travis.yml b/.travis.yml
index 711fa49c74..618fdeded3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: php
 
-dist: precise
+dist: trusty
 sudo: false
 
 git:
@@ -20,10 +20,8 @@ env:
 
 matrix:
     include:
-        # Use the newer stack for HHVM as HHVM does not support Precise anymore since a long time and so Precise has an outdated version
         - php: hhvm-3.18
           sudo: required
-          dist: trusty
           group: edge
         - php: 5.5
         - php: 5.6
@@ -104,7 +102,6 @@ before_install:
       echo opcache.enable_cli = 1 >> $INI
       echo hhvm.jit = 0 >> $INI
       echo apc.enable_cli = 1 >> $INI
-      echo extension = ldap.so >> $INI
       echo extension = redis.so >> $INI
       echo extension = memcached.so >> $INI
       [[ $PHP = 5.* ]] && echo extension = memcache.so >> $INI
diff --git a/src/Symfony/Component/Console/Input/ArrayInput.php b/src/Symfony/Component/Console/Input/ArrayInput.php
index 434ec0240d..19921fb3b6 100644
--- a/src/Symfony/Component/Console/Input/ArrayInput.php
+++ b/src/Symfony/Component/Console/Input/ArrayInput.php
@@ -112,9 +112,15 @@ class ArrayInput extends Input
         $params = array();
         foreach ($this->parameters as $param => $val) {
             if ($param && '-' === $param[0]) {
-                $params[] = $param.('' != $val ? '='.$this->escapeToken($val) : '');
+                if (is_array($val)) {
+                    foreach ($val as $v) {
+                        $params[] = $param.('' != $v ? '='.$this->escapeToken($v) : '');
+                    }
+                } else {
+                    $params[] = $param.('' != $val ? '='.$this->escapeToken($val) : '');
+                }
             } else {
-                $params[] = $this->escapeToken($val);
+                $params[] = is_array($val) ? array_map(array($this, 'escapeToken'), $val) : $this->escapeToken($val);
             }
         }
 
diff --git a/src/Symfony/Component/Console/Tests/Input/ArrayInputTest.php b/src/Symfony/Component/Console/Tests/Input/ArrayInputTest.php
index a1b5a2030b..3e8584352a 100644
--- a/src/Symfony/Component/Console/Tests/Input/ArrayInputTest.php
+++ b/src/Symfony/Component/Console/Tests/Input/ArrayInputTest.php
@@ -167,5 +167,8 @@ class ArrayInputTest extends TestCase
     {
         $input = new ArrayInput(array('-f' => null, '-b' => 'bar', '--foo' => 'b a z', '--lala' => null, 'test' => 'Foo', 'test2' => "A\nB'C"));
         $this->assertEquals('-f -b=bar --foo='.escapeshellarg('b a z').' --lala Foo '.escapeshellarg("A\nB'C"), (string) $input);
+
+        $input = new ArrayInput(array('-b' => array('bval_1', 'bval_2'), '--f' => array('fval_1', 'fval_2')));
+        $this->assertSame('-b=bval_1 -b=bval_2 --f=fval_1 --f=fval_2', (string) $input);
     }
 }
diff --git a/src/Symfony/Component/ExpressionLanguage/Node/GetAttrNode.php b/src/Symfony/Component/ExpressionLanguage/Node/GetAttrNode.php
index c5c99d78ca..2ecba97f7f 100644
--- a/src/Symfony/Component/ExpressionLanguage/Node/GetAttrNode.php
+++ b/src/Symfony/Component/ExpressionLanguage/Node/GetAttrNode.php
@@ -82,8 +82,11 @@ class GetAttrNode extends Node
                 if (!is_object($obj)) {
                     throw new \RuntimeException('Unable to get a property on a non-object.');
                 }
+                if (!is_callable($toCall = array($obj, $this->nodes['attribute']->attributes['value']))) {
+                    throw new \RuntimeException(sprintf('Unable to call method "%s" of object "%s".', $this->nodes['attribute']->attributes['value'], get_class($obj)));
+                }
 
-                return call_user_func_array(array($obj, $this->nodes['attribute']->attributes['value']), $this->nodes['arguments']->evaluate($functions, $values));
+                return call_user_func_array($toCall, $this->nodes['arguments']->evaluate($functions, $values));
 
             case self::ARRAY_CALL:
                 $array = $this->nodes['node']->evaluate($functions, $values);
diff --git a/src/Symfony/Component/ExpressionLanguage/Tests/ExpressionLanguageTest.php b/src/Symfony/Component/ExpressionLanguage/Tests/ExpressionLanguageTest.php
index 82f1c439b9..eb4f7d2ef0 100644
--- a/src/Symfony/Component/ExpressionLanguage/Tests/ExpressionLanguageTest.php
+++ b/src/Symfony/Component/ExpressionLanguage/Tests/ExpressionLanguageTest.php
@@ -242,6 +242,16 @@ class ExpressionLanguageTest extends TestCase
         $registerCallback($el);
     }
 
+    /**
+     * @expectedException \RuntimeException
+     * @expectedExceptionMessageRegExp  /Unable to call method "\w+" of object "\w+"./
+     */
+    public function testCallBadCallable()
+    {
+        $el = new ExpressionLanguage();
+        $el->evaluate('foo.myfunction()', array('foo' => new \stdClass()));
+    }
+
     /**
      * @dataProvider getRegisterCallbacks
      * @expectedException \LogicException
diff --git a/src/Symfony/Component/HttpFoundation/JsonResponse.php b/src/Symfony/Component/HttpFoundation/JsonResponse.php
index cf1a11ea2c..ed8f1e9b82 100644
--- a/src/Symfony/Component/HttpFoundation/JsonResponse.php
+++ b/src/Symfony/Component/HttpFoundation/JsonResponse.php
@@ -146,12 +146,17 @@ class JsonResponse extends Response
             $data = json_encode($data, $this->encodingOptions);
         } else {
             try {
-                // PHP 5.4 and up wrap exceptions thrown by JsonSerializable
-                // objects in a new exception that needs to be removed.
-                // Fortunately, PHP 5.5 and up do not trigger any warning anymore.
-                $data = json_encode($data, $this->encodingOptions);
+                if (!interface_exists('JsonSerializable', false)) {
+                    set_error_handler(function () { return false; });
+                    $data = @json_encode($data, $this->encodingOptions);
+                    restore_error_handler();
+                } else {
+                    $data = json_encode($data, $this->encodingOptions);
+                }
             } catch (\Exception $e) {
-                if ('Exception' === get_class($e) && 0 === strpos($e->getMessage(), 'Failed calling ')) {
+                if (!interface_exists('JsonSerializable', false)) {
+                     restore_error_handler();
+                } elseif ('Exception' === get_class($e) && 0 === strpos($e->getMessage(), 'Failed calling ')) {
                     throw $e->getPrevious() ?: $e;
                 }
                 throw $e;
diff --git a/src/Symfony/Component/HttpFoundation/Tests/JsonResponseTest.php b/src/Symfony/Component/HttpFoundation/Tests/JsonResponseTest.php
index c8b9377895..201839f89c 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/JsonResponseTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/JsonResponseTest.php
@@ -228,6 +228,10 @@ class JsonResponseTest extends TestCase
      */
     public function testSetContentJsonSerializeError()
     {
+        if (!interface_exists('JsonSerializable', false)) {
+            $this->markTestSkipped('JsonSerializable is required.');
+        }
+
         $serializable = new JsonSerializableObject();
 
         JsonResponse::create($serializable);
@@ -242,7 +246,7 @@ class JsonResponseTest extends TestCase
     }
 }
 
-if (interface_exists('JsonSerializable')) {
+if (interface_exists('JsonSerializable', false)) {
     class JsonSerializableObject implements \JsonSerializable
     {
         public function jsonSerialize()