diff --git a/CHANGELOG-3.1.md b/CHANGELOG-3.1.md
index 9b183cb3a8..cb59a7e2ec 100644
--- a/CHANGELOG-3.1.md
+++ b/CHANGELOG-3.1.md
@@ -7,6 +7,27 @@ in 3.1 minor versions.
 To get the diff for a specific change, go to https://github.com/symfony/symfony/commit/XXX where XXX is the change hash
 To get the diff between two versions, go to https://github.com/symfony/symfony/compare/v3.1.0...v3.1.1
 
+* 3.1.0-RC1 (2016-05-26)
+
+ * bug #18879 [Console] SymfonyStyle: Align multi-line/very-long-line blocks (chalasr)
+ * bug #18881 [Security][Ldap] Fixed issue with password attribute containing an array of values. (csarrazi)
+ * bug #18864 [Console][DX] Fixed ambiguous error message when using a duplicate option shortcut (peterrehm)
+ * bug #18883 Fix js comment in profiler (linnaea)
+ * feature #18867 [Cache] Drop counting hit/miss in ProxyAdapter (nicolas-grekas)
+ * bug #18837 [Serializer] AbstractObjectNormalizer: be sure that isAllowedAttribute is called (dunglas)
+ * bug #18838 [Serializer] ObjectNormalizer: add missing parameters (dunglas)
+ * bug #18844 [Yaml] fix exception contexts (xabbuh)
+ * bug #18840 [Yaml] properly handle unindented collections (xabbuh)
+ * bug #18765 Catch \Throwable (fprochazka)
+ * bug #18813 Catch \Throwable (fprochazka)
+ * bug #18839 People - person singularization (Keeo)
+ * bug #18820 [Config] Allow schemed paths in FileResource (nicolas-grekas)
+ * bug #18828 [Yaml] chomp newlines only at the end of YAML documents (xabbuh)
+ * bug #18814 Fixed server status command when port has been omitted (peterrehm)
+ * bug #18759 [Validator] Support for DateTimeImmutable (krzysiekpiasecki)
+ * bug #18799 Use levenshtein level for better Bundle matching (j0k3r)
+ * bug #18413 [WebProfilerBundle] Fix CORS ajax security issues (romainneutron)
+
 * 3.1.0-BETA1 (2016-05-13)
 
  * feature #18725 [Ldap] Added the possibility to configure all available Ldap options for connection (csarrazi)
diff --git a/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_9.php b/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_9.php
index 0f0a4e69d0..6420730fd6 100644
--- a/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_9.php
+++ b/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_9.php
@@ -7,5 +7,5 @@ use Symfony\Component\Console\Tests\Style\SymfonyStyleWithForcedLineLength;
 //Ensure that all lines are aligned to the begin of the first line in a multi-line block
 return function (InputInterface $input, OutputInterface $output) {
     $output = new SymfonyStyleWithForcedLineLength($input, $output);
-    $output->block(['Custom block', 'Second custom block line'], 'CUSTOM', 'fg=white;bg=green', 'X ', true);
+    $output->block(array('Custom block', 'Second custom block line'), 'CUSTOM', 'fg=white;bg=green', 'X ', true);
 };
diff --git a/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorTest.php b/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorTest.php
index f3c7b405c1..3f1ef1c040 100644
--- a/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorTest.php
+++ b/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorTest.php
@@ -242,7 +242,9 @@ class PropertyAccessorTest extends \PHPUnit_Framework_TestCase
      */
     public function testSetValueThrowsExceptionIfNotArrayAccess()
     {
-        $this->propertyAccessor->setValue(new \stdClass(), '[index]', 'Updated');
+        $object = new \stdClass();
+
+        $this->propertyAccessor->setValue($object, '[index]', 'Updated');
     }
 
     public function testSetValueUpdatesMagicSet()
@@ -259,7 +261,9 @@ class PropertyAccessorTest extends \PHPUnit_Framework_TestCase
      */
     public function testSetValueThrowsExceptionIfThereAreMissingParameters()
     {
-        $this->propertyAccessor->setValue(new TestClass('Bernhard'), 'publicAccessorWithMoreRequiredParameters', 'Updated');
+        $object = new TestClass('Bernhard');
+
+        $this->propertyAccessor->setValue($object, 'publicAccessorWithMoreRequiredParameters', 'Updated');
     }
 
     /**
@@ -527,7 +531,9 @@ class PropertyAccessorTest extends \PHPUnit_Framework_TestCase
      */
     public function testThrowTypeError()
     {
-        $this->propertyAccessor->setValue(new TypeHinted(), 'date', 'This is a string, \DateTime expected.');
+        $object = new TypeHinted();
+
+        $this->propertyAccessor->setValue($object, 'date', 'This is a string, \DateTime expected.');
     }
 
     public function testSetTypeHint()
diff --git a/src/Symfony/Component/Yaml/Parser.php b/src/Symfony/Component/Yaml/Parser.php
index de1101f009..2b5cb79951 100644
--- a/src/Symfony/Component/Yaml/Parser.php
+++ b/src/Symfony/Component/Yaml/Parser.php
@@ -539,7 +539,7 @@ class Parser
         try {
             $parsedValue = Inline::parse($value, $flags, $this->refs);
 
-            if ('mapping' === $context && '"' !== $value[0] && "'" !== $value[0] && '[' !== $value[0] && '{' !== $value[0] && '!' !== $value[0] && false !== strpos($parsedValue, ': ')) {
+            if ('mapping' === $context && is_string($parsedValue) && '"' !== $value[0] && "'" !== $value[0] && '[' !== $value[0] && '{' !== $value[0] && '!' !== $value[0] && false !== strpos($parsedValue, ': ')) {
                 throw new ParseException('A colon cannot be used in an unquoted mapping value.');
             }
 
diff --git a/src/Symfony/Component/Yaml/Tests/ParserTest.php b/src/Symfony/Component/Yaml/Tests/ParserTest.php
index bb70c3a9a8..3dd69ff634 100644
--- a/src/Symfony/Component/Yaml/Tests/ParserTest.php
+++ b/src/Symfony/Component/Yaml/Tests/ParserTest.php
@@ -1251,6 +1251,19 @@ EOT
             ),
         );
     }
+
+    public function testParseDateAsMappingValue()
+    {
+        $yaml = <<<EOT
+date: 2002-12-14
+EOT;
+        $expectedDate = new \DateTime();
+        $expectedDate->setTimeZone(new \DateTimeZone('UTC'));
+        $expectedDate->setDate(2002, 12, 14);
+        $expectedDate->setTime(0, 0, 0);
+
+        $this->assertEquals(array('date' => $expectedDate), $this->parser->parse($yaml, Yaml::PARSE_DATETIME));
+    }
 }
 
 class B