Removed dead code and various cleaning

* 2.5:
  fixed tests
  [EventDispatcher] Add missing checks to RegisterListenersPass
  Inline private 'is quoting required' methods in Escaper
  [Debug] fix loading order for legacy classes
  Add comment as requested
  Remove duplicate 'require'
  [Yaml] Improve YAML boolean escaping

Conflicts:
	src/Symfony/Component/Yaml/Tests/InlineTest.php

Exception/FatalErrorException.php

@@ -9,9 +9,7 @@
  * file that was distributed with this source code.
  */
 
-namespace Symfony\Component\Debug\Exception;
-
-use Symfony\Component\HttpKernel\Exception\FatalErrorException as LegacyFatalErrorException;
+namespace Symfony\Component\HttpKernel\Exception;
 
 /**
  * Fatal Error Exception.
@@ -19,21 +17,23 @@ use Symfony\Component\HttpKernel\Exception\FatalErrorException as LegacyFatalErr
  * @author Fabien Potencier <fabien@symfony.com>
  * @author Konstanton Myakshin <koc-dp@yandex.ru>
  * @author Nicolas Grekas <p@tchwork.com>
+ *
+ * @deprecated Deprecated in 2.3, to be removed in 3.0. Use the same class from the Debug component instead.
  */
-class FatalErrorException extends LegacyFatalErrorException
+class FatalErrorException extends \ErrorException
 {
 }
 
-namespace Symfony\Component\HttpKernel\Exception;
+namespace Symfony\Component\Debug\Exception;
+
+use Symfony\Component\HttpKernel\Exception\FatalErrorException as LegacyFatalErrorException;
 
 /**
  * Fatal Error Exception.
  *
  * @author Konstanton Myakshin <koc-dp@yandex.ru>
- *
- * @deprecated Deprecated in 2.3, to be removed in 3.0. Use the same class from the Debug component instead.
  */
-class FatalErrorException extends \ErrorException
+class FatalErrorException extends LegacyFatalErrorException
 {
     public function __construct($message, $code, $severity, $filename, $lineno, $traceOffset = null, $traceArgs = true)
     {

Exception/FlattenException.php

@@ -9,6 +9,46 @@
  * file that was distributed with this source code.
  */
 
+namespace Symfony\Component\HttpKernel\Exception;
+
+use Symfony\Component\Debug\Exception\FlattenException as DebugFlattenException;
+
+/**
+ * FlattenException wraps a PHP Exception to be able to serialize it.
+ *
+ * Basically, this class removes all objects from the trace.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated Deprecated in 2.3, to be removed in 3.0. Use the same class from the Debug component instead.
+ */
+class FlattenException
+{
+    private $handler;
+
+    public static function __callStatic($method, $args)
+    {
+        if (!method_exists('Symfony\Component\Debug\Exception\FlattenException', $method)) {
+            throw new \BadMethodCallException(sprintf('Call to undefined method %s::%s()', get_called_class(), $method));
+        }
+
+        return call_user_func_array(array('Symfony\Component\Debug\Exception\FlattenException', $method), $args);
+    }
+
+    public function __call($method, $args)
+    {
+        if (!isset($this->handler)) {
+            $this->handler = new DebugFlattenException();
+        }
+
+        if (!method_exists($this->handler, $method)) {
+            throw new \BadMethodCallException(sprintf('Call to undefined method %s::%s()', get_class($this), $method));
+        }
+
+        return call_user_func_array(array($this->handler, $method), $args);
+    }
+}
+
 namespace Symfony\Component\Debug\Exception;
 
 use Symfony\Component\HttpKernel\Exception\FlattenException as LegacyFlattenException;
@@ -250,35 +290,3 @@ class FlattenException extends LegacyFlattenException
         return $array['__PHP_Incomplete_Class_Name'];
     }
 }
-
-namespace Symfony\Component\HttpKernel\Exception;
-
-use Symfony\Component\Debug\Exception\FlattenException as DebugFlattenException;
-
-/**
- * FlattenException wraps a PHP Exception to be able to serialize it.
- *
- * Basically, this class removes all objects from the trace.
- *
- * @author Fabien Potencier <fabien@symfony.com>
- *
- * @deprecated Deprecated in 2.3, to be removed in 3.0. Use the same class from the Debug component instead.
- */
-class FlattenException
-{
-    private $handler;
-
-    public static function __callStatic($method, $args)
-    {
-        return forward_static_call_array(array('Symfony\Component\Debug\Exception\FlattenException', $method), $args);
-    }
-
-    public function __call($method, $args)
-    {
-        if (!isset($this->handler)) {
-            $this->handler = new DebugFlattenException();
-        }
-
-        return call_user_func_array(array($this->handler, $method), $args);
-    }
-}

ExceptionHandler.php

@@ -50,7 +50,7 @@ class ExceptionHandler
      */
     public static function register($debug = true, $fileLinkFormat = null)
     {
-        $handler = new static($debug, $fileLinkFormat = null);
+        $handler = new static($debug, $fileLinkFormat);
 
         $prev = set_exception_handler(array($handler, 'handle'));
         if (is_array($prev) && $prev[0] instanceof ErrorHandler) {

composer.json

@@ -19,6 +19,9 @@
         "php": ">=5.3.3",
         "psr/log": "~1.0"
     },
+    "conflict": {
+        "symfony/http-kernel": ">=2.3,<2.3.24|~2.4.0|>=2.5,<2.5.9|>=2.6,<2.6.2"
+    },
     "require-dev": {
         "symfony/class-loader": "~2.2",
         "symfony/http-kernel": "~2.3.24|~2.5.9|~2.6,>=2.6.2",