[Debug] Fix populating error_get_last() for handled silent errors

This PR was squashed before being merged into the 2.7 branch (closes #25653).

Discussion
----------

PHP CS Fixer: clean up repo and adjust config

| Q             | A
| ------------- | ---
| Branch?       | 2.7
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | n/a
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

Reason for this PR is that one want to have `php-cs-fixer fix -v` command executed without changes that shall not be applied for this repo. To achieve that, we need to groom config to exclude files that violate CS willingly, fix files that are violating CS unwillingly, and deliver missing case handling at PHP CS Fixer itself (https://github.com/FriendsOfPHP/PHP-CS-Fixer/pull/3359) (already merged!).

Commits
-------

b14cbc1 PHP CS Fixer: clean up repo and adjust config

BufferingLogger.php

@@ -1,37 +0,0 @@
-<?php
-
-/*
- * This file is part of the Symfony package.
- *
- * (c) Fabien Potencier <fabien@symfony.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-namespace Symfony\Component\Debug;
-
-use Psr\Log\AbstractLogger;
-
-/**
- * A buffering logger that stacks logs for later.
- *
- * @author Nicolas Grekas <p@tchwork.com>
- */
-class BufferingLogger extends AbstractLogger
-{
-    private $logs = array();
-
-    public function log($level, $message, array $context = array())
-    {
-        $this->logs[] = array($level, $message, $context);
-    }
-
-    public function cleanLogs()
-    {
-        $logs = $this->logs;
-        $this->logs = array();
-
-        return $logs;
-    }
-}

CHANGELOG.md

@@ -1,25 +1,6 @@
 CHANGELOG
 =========
 
-3.2.0
------
-
-* `FlattenException::getTrace()` now returns additional type descriptions
-  `integer` and `float`.
-
-
-3.0.0
------
-
-* removed classes, methods and interfaces deprecated in 2.x
-
-2.8.0
------
-
-* added BufferingLogger for errors that happen before a proper logger is configured
-* allow throwing from `__toString()` with `return trigger_error($e, E_USER_ERROR);`
-* deprecate ExceptionHandler::createResponse
-
 2.7.0
 -----
 

Debug.php

@@ -31,7 +31,7 @@ class Debug
      * @param int  $errorReportingLevel The level of error reporting you want
      * @param bool $displayErrors       Whether to display errors (for development) or just log them (for production)
      */
-    public static function enable($errorReportingLevel = E_ALL, $displayErrors = true)
+    public static function enable($errorReportingLevel = null, $displayErrors = true)
     {
         if (static::$enabled) {
             return;
@@ -42,20 +42,19 @@ class Debug
         if (null !== $errorReportingLevel) {
             error_reporting($errorReportingLevel);
         } else {
-            error_reporting(E_ALL);
+            error_reporting(-1);
         }
 
-        if ('cli' !== PHP_SAPI) {
+        if (!\in_array(PHP_SAPI, array('cli', 'phpdbg'), true)) {
             ini_set('display_errors', 0);
             ExceptionHandler::register();
         } elseif ($displayErrors && (!ini_get('log_errors') || ini_get('error_log'))) {
             // CLI - display errors only if they're not already logged to STDERR
             ini_set('display_errors', 1);
         }
-        if ($displayErrors) {
-            ErrorHandler::register(new ErrorHandler(new BufferingLogger()));
-        } else {
-            ErrorHandler::register()->throwAt(0, true);
+        $handler = ErrorHandler::register();
+        if (!$displayErrors) {
+            $handler->throwAt(0, true);
         }
 
         DebugClassLoader::enable();

DebugClassLoader.php

@@ -26,20 +26,28 @@ class DebugClassLoader
 {
     private $classLoader;
     private $isFinder;
+    private $loaded = array();
+    private $wasFinder;
     private static $caseCheck;
     private static $deprecated = array();
     private static $php7Reserved = array('int', 'float', 'bool', 'string', 'true', 'false', 'null');
     private static $darwinCache = array('/' => array('/', array()));
 
     /**
-     * Constructor.
-     *
-     * @param callable $classLoader A class loader
+     * @param callable|object $classLoader Passing an object is @deprecated since version 2.5 and support for it will be removed in 3.0
      */
-    public function __construct(callable $classLoader)
+    public function __construct($classLoader)
     {
-        $this->classLoader = $classLoader;
-        $this->isFinder = is_array($classLoader) && method_exists($classLoader[0], 'findFile');
+        $this->wasFinder = is_object($classLoader) && method_exists($classLoader, 'findFile');
+
+        if ($this->wasFinder) {
+            @trigger_error('The '.__METHOD__.' method will no longer support receiving an object into its $classLoader argument in 3.0.', E_USER_DEPRECATED);
+            $this->classLoader = array($classLoader, 'loadClass');
+            $this->isFinder = true;
+        } else {
+            $this->classLoader = $classLoader;
+            $this->isFinder = is_array($classLoader) && method_exists($classLoader[0], 'findFile');
+        }
 
         if (!isset(self::$caseCheck)) {
             $file = file_exists(__FILE__) ? __FILE__ : rtrim(realpath('.'), DIRECTORY_SEPARATOR);
@@ -68,11 +76,11 @@ class DebugClassLoader
     /**
      * Gets the wrapped class loader.
      *
-     * @return callable The wrapped class loader
+     * @return callable|object A class loader. Since version 2.5, returning an object is @deprecated and support for it will be removed in 3.0
      */
     public function getClassLoader()
     {
-        return $this->classLoader;
+        return $this->wasFinder ? $this->classLoader[0] : $this->classLoader;
     }
 
     /**
@@ -123,6 +131,24 @@ class DebugClassLoader
         }
     }
 
+    /**
+     * Finds a file by class name.
+     *
+     * @param string $class A class name to resolve to file
+     *
+     * @return string|null
+     *
+     * @deprecated since version 2.5, to be removed in 3.0.
+     */
+    public function findFile($class)
+    {
+        @trigger_error('The '.__METHOD__.' method is deprecated since Symfony 2.5 and will be removed in 3.0.', E_USER_DEPRECATED);
+
+        if ($this->wasFinder) {
+            return $this->classLoader[0]->findFile($class);
+        }
+    }
+
     /**
      * Loads the given class or interface.
      *
@@ -137,21 +163,30 @@ class DebugClassLoader
         ErrorHandler::stackErrors();
 
         try {
-            if ($this->isFinder) {
+            if ($this->isFinder && !isset($this->loaded[$class])) {
+                $this->loaded[$class] = true;
                 if ($file = $this->classLoader[0]->findFile($class)) {
-                    require_once $file;
+                    require $file;
                 }
             } else {
                 call_user_func($this->classLoader, $class);
                 $file = false;
             }
-        } finally {
+        } catch (\Exception $e) {
             ErrorHandler::unstackErrors();
+
+            throw $e;
+        } catch (\Throwable $e) {
+            ErrorHandler::unstackErrors();
+
+            throw $e;
         }
 
-        $exists = class_exists($class, false) || interface_exists($class, false) || trait_exists($class, false);
+        ErrorHandler::unstackErrors();
 
-        if ('\\' === $class[0]) {
+        $exists = class_exists($class, false) || interface_exists($class, false) || (function_exists('trait_exists') && trait_exists($class, false));
+
+        if ($class && '\\' === $class[0]) {
             $class = substr($class, 1);
         }
 
@@ -168,18 +203,11 @@ class DebugClassLoader
             } elseif (preg_match('#\n \* @deprecated (.*?)\r?\n \*(?: @|/$)#s', $refl->getDocComment(), $notice)) {
                 self::$deprecated[$name] = preg_replace('#\s*\r?\n \* +#', ' ', $notice[1]);
             } else {
-                if (2 > $len = 1 + (strpos($name, '\\', 1 + strpos($name, '\\')) ?: strpos($name, '_'))) {
+                if (2 > $len = 1 + (strpos($name, '\\') ?: strpos($name, '_'))) {
                     $len = 0;
                     $ns = '';
                 } else {
-                    switch ($ns = substr($name, 0, $len)) {
-                        case 'Symfony\Bridge\\':
-                        case 'Symfony\Bundle\\':
-                        case 'Symfony\Component\\':
-                            $ns = 'Symfony\\';
-                            $len = strlen($ns);
-                            break;
-                    }
+                    $ns = substr($name, 0, $len);
                 }
                 $parent = get_parent_class($class);
 
@@ -188,26 +216,9 @@ class DebugClassLoader
                         @trigger_error(sprintf('The %s class extends %s that is deprecated %s', $name, $parent, self::$deprecated[$parent]), E_USER_DEPRECATED);
                     }
 
-                    $parentInterfaces = array();
-                    $deprecatedInterfaces = array();
-                    if ($parent) {
-                        foreach (class_implements($parent) as $interface) {
-                            $parentInterfaces[$interface] = 1;
-                        }
-                    }
-
-                    foreach ($refl->getInterfaceNames() as $interface) {
-                        if (isset(self::$deprecated[$interface]) && strncmp($ns, $interface, $len)) {
-                            $deprecatedInterfaces[] = $interface;
-                        }
-                        foreach (class_implements($interface) as $interface) {
-                            $parentInterfaces[$interface] = 1;
-                        }
-                    }
-
-                    foreach ($deprecatedInterfaces as $interface) {
-                        if (!isset($parentInterfaces[$interface])) {
-                            @trigger_error(sprintf('The %s %s %s that is deprecated %s', $name, $refl->isInterface() ? 'interface extends' : 'class implements', $interface, self::$deprecated[$interface]), E_USER_DEPRECATED);
+                    foreach (class_implements($class) as $interface) {
+                        if (isset(self::$deprecated[$interface]) && strncmp($ns, $interface, $len) && !is_subclass_of($parent, $interface)) {
+                            @trigger_error(sprintf('The %s %s %s that is deprecated %s', $name, interface_exists($class) ? 'interface extends' : 'class implements', $interface, self::$deprecated[$interface]), E_USER_DEPRECATED);
                         }
                     }
                 }

ErrorHandler.php

@@ -17,7 +17,6 @@ use Symfony\Component\Debug\Exception\ContextErrorException;
 use Symfony\Component\Debug\Exception\FatalErrorException;
 use Symfony\Component\Debug\Exception\FatalThrowableError;
 use Symfony\Component\Debug\Exception\OutOfMemoryException;
-use Symfony\Component\Debug\Exception\SilencedErrorContext;
 use Symfony\Component\Debug\FatalErrorHandler\UndefinedFunctionFatalErrorHandler;
 use Symfony\Component\Debug\FatalErrorHandler\UndefinedMethodFatalErrorHandler;
 use Symfony\Component\Debug\FatalErrorHandler\ClassNotFoundFatalErrorHandler;
@@ -30,7 +29,7 @@ use Symfony\Component\Debug\FatalErrorHandler\FatalErrorHandlerInterface;
  * - thrownErrors: errors thrown as \ErrorException
  * - loggedErrors: logged errors, when not @-silenced
  * - scopedErrors: errors thrown or logged with their local context
- * - tracedErrors: errors logged with their stack trace
+ * - tracedErrors: errors logged with their stack trace, only once for repeated errors
  * - screamedErrors: never @-silenced errors
  *
  * Each error level can be logged by a dedicated PSR-3 logger object.
@@ -44,10 +43,14 @@ use Symfony\Component\Debug\FatalErrorHandler\FatalErrorHandlerInterface;
  * can see them and weight them as more important to fix than others of the same level.
  *
  * @author Nicolas Grekas <p@tchwork.com>
- * @author Grégoire Pineau <lyrixx@lyrixx.info>
  */
 class ErrorHandler
 {
+    /**
+     * @deprecated since version 2.6, to be removed in 3.0.
+     */
+    const TYPE_DEPRECATION = -100;
+
     private $levels = array(
         E_DEPRECATED => 'Deprecated',
         E_USER_DEPRECATED => 'User Deprecated',
@@ -89,34 +92,47 @@ class ErrorHandler
     private $tracedErrors = 0x77FB; // E_ALL - E_STRICT - E_PARSE
     private $screamedErrors = 0x55; // E_ERROR + E_CORE_ERROR + E_COMPILE_ERROR + E_PARSE
     private $loggedErrors = 0;
-    private $traceReflector;
 
+    private $loggedTraces = array();
     private $isRecursive = 0;
     private $isRoot = false;
     private $exceptionHandler;
-    private $bootstrappingLogger;
 
     private static $reservedMemory;
     private static $stackedErrors = array();
     private static $stackedErrorLevels = array();
-    private static $toStringException = null;
+    private static $exitCode = 0;
+
+    /**
+     * Same init value as thrownErrors.
+     *
+     * @deprecated since version 2.6, to be removed in 3.0.
+     */
+    private $displayErrors = 0x1FFF;
 
     /**
      * Registers the error handler.
      *
-     * @param self|null $handler The handler to register
-     * @param bool      $replace Whether to replace or not any existing handler
+     * @param self|null|int $handler The handler to register, or @deprecated (since version 2.6, to be removed in 3.0) bit field of thrown levels
+     * @param bool          $replace Whether to replace or not any existing handler
      *
      * @return self The registered error handler
      */
-    public static function register(self $handler = null, $replace = true)
+    public static function register($handler = null, $replace = true)
     {
         if (null === self::$reservedMemory) {
             self::$reservedMemory = str_repeat('x', 10240);
             register_shutdown_function(__CLASS__.'::handleFatalError');
         }
 
-        if ($handlerIsNew = null === $handler) {
+        $levels = -1;
+
+        if ($handlerIsNew = !$handler instanceof self) {
+            // @deprecated polymorphism, to be removed in 3.0
+            if (null !== $handler) {
+                $levels = $replace ? $handler : 0;
+                $replace = true;
+            }
             $handler = new static();
         }
 
@@ -131,27 +147,31 @@ class ErrorHandler
             $handler = $prev[0];
             $replace = false;
         }
-        if ($replace || !$prev) {
-            $handler->setExceptionHandler(set_exception_handler(array($handler, 'handleException')));
-        } else {
+        if (!$replace && $prev) {
             restore_error_handler();
+            $handlerIsRegistered = is_array($prev) && $handler === $prev[0];
+        } else {
+            $handlerIsRegistered = true;
+        }
+        if (is_array($prev = set_exception_handler(array($handler, 'handleException'))) && $prev[0] instanceof self) {
+            restore_exception_handler();
+            if (!$handlerIsRegistered) {
+                $handler = $prev[0];
+            } elseif ($handler !== $prev[0] && $replace) {
+                set_exception_handler(array($handler, 'handleException'));
+                $p = $prev[0]->setExceptionHandler(null);
+                $handler->setExceptionHandler($p);
+                $prev[0]->setExceptionHandler($p);
+            }
+        } else {
+            $handler->setExceptionHandler($prev);
         }
 
-        $handler->throwAt(E_ALL & $handler->thrownErrors, true);
+        $handler->throwAt($levels & $handler->thrownErrors, true);
 
         return $handler;
     }
 
-    public function __construct(BufferingLogger $bootstrappingLogger = null)
-    {
-        if ($bootstrappingLogger) {
-            $this->bootstrappingLogger = $bootstrappingLogger;
-            $this->setDefaultLogger($bootstrappingLogger);
-        }
-        $this->traceReflector = new \ReflectionProperty('Exception', 'trace');
-        $this->traceReflector->setAccessible(true);
-    }
-
     /**
      * Sets a logger to non assigned errors levels.
      *
@@ -159,22 +179,22 @@ class ErrorHandler
      * @param array|int       $levels  An array map of E_* to LogLevel::* or an integer bit field of E_* constants
      * @param bool            $replace Whether to replace or not any existing logger
      */
-    public function setDefaultLogger(LoggerInterface $logger, $levels = E_ALL, $replace = false)
+    public function setDefaultLogger(LoggerInterface $logger, $levels = null, $replace = false)
     {
         $loggers = array();
 
         if (is_array($levels)) {
             foreach ($levels as $type => $logLevel) {
-                if (empty($this->loggers[$type][0]) || $replace || $this->loggers[$type][0] === $this->bootstrappingLogger) {
+                if (empty($this->loggers[$type][0]) || $replace) {
                     $loggers[$type] = array($logger, $logLevel);
                 }
             }
         } else {
             if (null === $levels) {
-                $levels = E_ALL;
+                $levels = E_ALL | E_STRICT;
             }
             foreach ($this->loggers as $type => $log) {
-                if (($type & $levels) && (empty($log[0]) || $replace || $log[0] === $this->bootstrappingLogger)) {
+                if (($type & $levels) && (empty($log[0]) || $replace)) {
                     $log[0] = $logger;
                     $loggers[$type] = $log;
                 }
@@ -197,7 +217,6 @@ class ErrorHandler
     {
         $prevLogged = $this->loggedErrors;
         $prev = $this->loggers;
-        $flush = array();
 
         foreach ($loggers as $type => $log) {
             if (!isset($prev[$type])) {
@@ -216,24 +235,9 @@ class ErrorHandler
                 throw new \InvalidArgumentException('Invalid logger provided');
             }
             $this->loggers[$type] = $log + $prev[$type];
-
-            if ($this->bootstrappingLogger && $prev[$type][0] === $this->bootstrappingLogger) {
-                $flush[$type] = $type;
-            }
         }
         $this->reRegister($prevLogged | $this->thrownErrors);
 
-        if ($flush) {
-            foreach ($this->bootstrappingLogger->cleanLogs() as $log) {
-                $type = $log[2]['exception'] instanceof \ErrorException ? $log[2]['exception']->getSeverity() : E_ERROR;
-                if (!isset($flush[$type])) {
-                    $this->bootstrappingLogger->log($log[0], $log[1], $log[2]);
-                } elseif ($this->loggers[$type][0]) {
-                    $this->loggers[$type][0]->log($this->loggers[$type][1], $log[1], $log[2]);
-                }
-            }
-        }
-
         return $prev;
     }
 
@@ -243,9 +247,14 @@ class ErrorHandler
      * @param callable $handler A handler that will be called on Exception
      *
      * @return callable|null The previous exception handler
+     *
+     * @throws \InvalidArgumentException
      */
-    public function setExceptionHandler(callable $handler = null)
+    public function setExceptionHandler($handler)
     {
+        if (null !== $handler && !is_callable($handler)) {
+            throw new \LogicException('The exception handler must be a valid PHP callable.');
+        }
         $prev = $this->exceptionHandler;
         $this->exceptionHandler = $handler;
 
@@ -269,6 +278,9 @@ class ErrorHandler
         }
         $this->reRegister($prev | $this->loggedErrors);
 
+        // $this->displayErrors is @deprecated since version 2.6
+        $this->displayErrors = $this->thrownErrors;
+
         return $prev;
     }
 
@@ -365,15 +377,15 @@ class ErrorHandler
      */
     public function handleError($type, $message, $file, $line)
     {
-        // Level is the current error reporting level to manage silent error.
-        // Strong errors are not authorized to be silenced.
-        $level = error_reporting() | E_RECOVERABLE_ERROR | E_USER_ERROR | E_DEPRECATED | E_USER_DEPRECATED;
+        $level = error_reporting();
+        $silenced = 0 === ($level & $type);
+        $level |= E_RECOVERABLE_ERROR | E_USER_ERROR | E_DEPRECATED | E_USER_DEPRECATED;
         $log = $this->loggedErrors & $type;
         $throw = $this->thrownErrors & $type & $level;
         $type &= $level | $this->screamedErrors;
 
         if (!$type || (!$log && !$throw)) {
-            return $type && $log;
+            return !$silenced && $type && $log;
         }
         $scope = $this->scopedErrors & $type;
 
@@ -400,105 +412,76 @@ class ErrorHandler
             return true;
         }
 
-        $logMessage = $this->levels[$type].': '.$message;
-
-        if (null !== self::$toStringException) {
-            $errorAsException = self::$toStringException;
-            self::$toStringException = null;
-        } elseif (!$throw && !($type & $level)) {
-            $errorAsException = new SilencedErrorContext($type, $file, $line);
-        } else {
-            if ($scope) {
-                $errorAsException = new ContextErrorException($logMessage, 0, $type, $file, $line, $context);
+        if ($throw) {
+            if ($scope && class_exists('Symfony\Component\Debug\Exception\ContextErrorException')) {
+                // Checking for class existence is a work around for https://bugs.php.net/42098
+                $throw = new ContextErrorException($this->levels[$type].': '.$message, 0, $type, $file, $line, $context);
             } else {
-                $errorAsException = new \ErrorException($logMessage, 0, $type, $file, $line);
+                $throw = new \ErrorException($this->levels[$type].': '.$message, 0, $type, $file, $line);
             }
 
-            // Clean the trace by removing function arguments and the first frames added by the error handler itself.
-            if ($throw || $this->tracedErrors & $type) {
-                $backtrace = $backtrace ?: $errorAsException->getTrace();
-                $lightTrace = $backtrace;
+            if (\PHP_VERSION_ID <= 50407 && (\PHP_VERSION_ID >= 50400 || \PHP_VERSION_ID <= 50317)) {
+                // Exceptions thrown from error handlers are sometimes not caught by the exception
+                // handler and shutdown handlers are bypassed before 5.4.8/5.3.18.
+                // We temporarily re-enable display_errors to prevent any blank page related to this bug.
 
-                for ($i = 0; isset($backtrace[$i]); ++$i) {
-                    if (isset($backtrace[$i]['file'], $backtrace[$i]['line']) && $backtrace[$i]['line'] === $line && $backtrace[$i]['file'] === $file) {
-                        $lightTrace = array_slice($lightTrace, 1 + $i);
-                        break;
-                    }
-                }
-                if (!($throw || $this->scopedErrors & $type)) {
-                    for ($i = 0; isset($lightTrace[$i]); ++$i) {
-                        unset($lightTrace[$i]['args']);
-                    }
-                }
-                $this->traceReflector->setValue($errorAsException, $lightTrace);
-            } else {
-                $this->traceReflector->setValue($errorAsException, array());
+                $throw->errorHandlerCanary = new ErrorHandlerCanary();
             }
+
+            throw $throw;
         }
 
-        if ($throw) {
-            if (E_USER_ERROR & $type) {
-                for ($i = 1; isset($backtrace[$i]); ++$i) {
-                    if (isset($backtrace[$i]['function'], $backtrace[$i]['type'], $backtrace[$i - 1]['function'])
-                        && '__toString' === $backtrace[$i]['function']
-                        && '->' === $backtrace[$i]['type']
-                        && !isset($backtrace[$i - 1]['class'])
-                        && ('trigger_error' === $backtrace[$i - 1]['function'] || 'user_error' === $backtrace[$i - 1]['function'])
-                    ) {
-                        // Here, we know trigger_error() has been called from __toString().
-                        // HHVM is fine with throwing from __toString() but PHP triggers a fatal error instead.
-                        // A small convention allows working around the limitation:
-                        // given a caught $e exception in __toString(), quitting the method with
-                        // `return trigger_error($e, E_USER_ERROR);` allows this error handler
-                        // to make $e get through the __toString() barrier.
+        // For duplicated errors, log the trace only once
+        $e = md5("{$type}/{$line}/{$file}\x00{$message}", true);
+        $trace = true;
 
-                        foreach ($context as $e) {
-                            if (($e instanceof \Exception || $e instanceof \Throwable) && $e->__toString() === $message) {
-                                if (1 === $i) {
-                                    // On HHVM
-                                    $errorAsException = $e;
-                                    break;
-                                }
-                                self::$toStringException = $e;
+        if (!($this->tracedErrors & $type) || isset($this->loggedTraces[$e])) {
+            $trace = false;
+        } else {
+            $this->loggedTraces[$e] = 1;
+        }
 
-                                return true;
-                            }
-                        }
+        $e = compact('type', 'file', 'line', 'level');
 
-                        if (1 < $i) {
-                            // On PHP (not on HHVM), display the original error message instead of the default one.
-                            $this->handleException($errorAsException);
-
-                            // Stop the process by giving back the error to the native handler.
-                            return false;
-                        }
+        if ($type & $level) {
+            if ($scope) {
+                $e['scope_vars'] = $context;
+                if ($trace) {
+                    $e['stack'] = $backtrace ?: debug_backtrace(DEBUG_BACKTRACE_PROVIDE_OBJECT);
+                }
+            } elseif ($trace) {
+                if (null === $backtrace) {
+                    $e['stack'] = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
+                } else {
+                    foreach ($backtrace as &$frame) {
+                        unset($frame['args'], $frame);
                     }
+                    $e['stack'] = $backtrace;
                 }
             }
-
-            throw $errorAsException;
         }
 
         if ($this->isRecursive) {
             $log = 0;
         } elseif (self::$stackedErrorLevels) {
-            self::$stackedErrors[] = array(
-                $this->loggers[$type][0],
-                ($type & $level) ? $this->loggers[$type][1] : LogLevel::DEBUG,
-                $logMessage,
-                array('exception' => $errorAsException),
-            );
+            self::$stackedErrors[] = array($this->loggers[$type][0], ($type & $level) ? $this->loggers[$type][1] : LogLevel::DEBUG, $message, $e);
         } else {
             try {
                 $this->isRecursive = true;
-                $level = ($type & $level) ? $this->loggers[$type][1] : LogLevel::DEBUG;
-                $this->loggers[$type][0]->log($level, $logMessage, array('exception' => $errorAsException));
-            } finally {
+                $this->loggers[$type][0]->log(($type & $level) ? $this->loggers[$type][1] : LogLevel::DEBUG, $message, $e);
                 $this->isRecursive = false;
+            } catch (\Exception $e) {
+                $this->isRecursive = false;
+
+                throw $e;
+            } catch (\Throwable $e) {
+                $this->isRecursive = false;
+
+                throw $e;
             }
         }
 
-        return $type && $log;
+        return !$silenced && $type && $log;
     }
 
     /**
@@ -511,19 +494,30 @@ class ErrorHandler
      */
     public function handleException($exception, array $error = null)
     {
+        if (null === $error) {
+            self::$exitCode = 255;
+        }
         if (!$exception instanceof \Exception) {
             $exception = new FatalThrowableError($exception);
         }
         $type = $exception instanceof FatalErrorException ? $exception->getSeverity() : E_ERROR;
+        $handlerException = null;
 
         if (($this->loggedErrors & $type) || $exception instanceof FatalThrowableError) {
+            $e = array(
+                'type' => $type,
+                'file' => $exception->getFile(),
+                'line' => $exception->getLine(),
+                'level' => error_reporting(),
+                'stack' => $exception->getTrace(),
+            );
             if ($exception instanceof FatalErrorException) {
                 if ($exception instanceof FatalThrowableError) {
                     $error = array(
                         'type' => $type,
                         'message' => $message = $exception->getMessage(),
-                        'file' => $exception->getFile(),
-                        'line' => $exception->getLine(),
+                        'file' => $e['file'],
+                        'line' => $e['line'],
                     );
                 } else {
                     $message = 'Fatal '.$exception->getMessage();
@@ -539,7 +533,7 @@ class ErrorHandler
         }
         if ($this->loggedErrors & $type) {
             try {
-                $this->loggers[$type][0]->log($this->loggers[$type][1], $message, array('exception' => $exception));
+                $this->loggers[$type][0]->log($this->loggers[$type][1], $message, $e);
             } catch (\Exception $handlerException) {
             } catch (\Throwable $handlerException) {
             }
@@ -552,18 +546,21 @@ class ErrorHandler
                 }
             }
         }
-        if (empty($this->exceptionHandler)) {
-            throw $exception; // Give back $exception to the native handler
-        }
+        $exceptionHandler = $this->exceptionHandler;
+        $this->exceptionHandler = null;
         try {
-            call_user_func($this->exceptionHandler, $exception);
+            if (null !== $exceptionHandler) {
+                return \call_user_func($exceptionHandler, $exception);
+            }
+            $handlerException = $handlerException ?: $exception;
         } catch (\Exception $handlerException) {
         } catch (\Throwable $handlerException) {
         }
-        if (isset($handlerException)) {
-            $this->exceptionHandler = null;
-            $this->handleException($handlerException);
+        if ($exception === $handlerException) {
+            self::$reservedMemory = null; // Disable the fatal error handler
+            throw $exception; // Give back $exception to the native handler
         }
+        $this->handleException($handlerException);
     }
 
     /**
@@ -579,17 +576,41 @@ class ErrorHandler
             return;
         }
 
-        self::$reservedMemory = null;
+        $handler = self::$reservedMemory = null;
+        $handlers = array();
+        $previousHandler = null;
+        $sameHandlerLimit = 10;
 
-        $handler = set_error_handler('var_dump');
-        $handler = is_array($handler) ? $handler[0] : null;
-        restore_error_handler();
+        while (!is_array($handler) || !$handler[0] instanceof self) {
+            $handler = set_exception_handler('var_dump');
+            restore_exception_handler();
 
-        if (!$handler instanceof self) {
+            if (!$handler) {
+                break;
+            }
+            restore_exception_handler();
+
+            if ($handler !== $previousHandler) {
+                array_unshift($handlers, $handler);
+                $previousHandler = $handler;
+            } elseif (0 === --$sameHandlerLimit) {
+                $handler = null;
+                break;
+            }
+        }
+        foreach ($handlers as $h) {
+            set_exception_handler($h);
+        }
+        if (!$handler) {
             return;
         }
+        if ($handler !== $h) {
+            $handler[0]->setExceptionHandler($h);
+        }
+        $handler = $handler[0];
+        $handlers = array();
 
-        if (null === $error) {
+        if ($exit = null === $error) {
             $error = error_get_last();
         }
 
@@ -613,15 +634,21 @@ class ErrorHandler
             } else {
                 $exception = new FatalErrorException($handler->levels[$error['type']].': '.$error['message'], 0, $error['type'], $error['file'], $error['line'], 2, true, $trace);
             }
-        } elseif (!isset($exception)) {
-            return;
         }
 
         try {
-            $handler->handleException($exception, $error);
+            if (isset($exception)) {
+                self::$exitCode = 255;
+                $handler->handleException($exception, $error);
+            }
         } catch (FatalErrorException $e) {
             // Ignore this re-throw
         }
+
+        if ($exit && self::$exitCode) {
+            $exitCode = self::$exitCode;
+            register_shutdown_function('register_shutdown_function', function () use ($exitCode) { exit($exitCode); });
+        }
     }
 
     /**
@@ -648,10 +675,10 @@ class ErrorHandler
         $level = array_pop(self::$stackedErrorLevels);
 
         if (null !== $level) {
-            $errorReportingLevel = error_reporting($level);
-            if ($errorReportingLevel !== ($level | E_PARSE | E_ERROR | E_CORE_ERROR | E_COMPILE_ERROR)) {
+            $e = error_reporting($level);
+            if ($e !== ($level | E_PARSE | E_ERROR | E_CORE_ERROR | E_COMPILE_ERROR)) {
                 // If the user changed the error level, do not overwrite it
-                error_reporting($errorReportingLevel);
+                error_reporting($e);
             }
         }
 
@@ -659,8 +686,8 @@ class ErrorHandler
             $errors = self::$stackedErrors;
             self::$stackedErrors = array();
 
-            foreach ($errors as $error) {
-                $error[0]->log($error[1], $error[2], $error[3]);
+            foreach ($errors as $e) {
+                $e[0]->log($e[1], $e[2], $e[3]);
             }
         }
     }
@@ -680,4 +707,118 @@ class ErrorHandler
             new ClassNotFoundFatalErrorHandler(),
         );
     }
+
+    /**
+     * Sets the level at which the conversion to Exception is done.
+     *
+     * @param int|null $level The level (null to use the error_reporting() value and 0 to disable)
+     *
+     * @deprecated since version 2.6, to be removed in 3.0. Use throwAt() instead.
+     */
+    public function setLevel($level)
+    {
+        @trigger_error('The '.__METHOD__.' method is deprecated since Symfony 2.6 and will be removed in 3.0. Use the throwAt() method instead.', E_USER_DEPRECATED);
+
+        $level = null === $level ? error_reporting() : $level;
+        $this->throwAt($level, true);
+    }
+
+    /**
+     * Sets the display_errors flag value.
+     *
+     * @param int $displayErrors The display_errors flag value
+     *
+     * @deprecated since version 2.6, to be removed in 3.0. Use throwAt() instead.
+     */
+    public function setDisplayErrors($displayErrors)
+    {
+        @trigger_error('The '.__METHOD__.' method is deprecated since Symfony 2.6 and will be removed in 3.0. Use the throwAt() method instead.', E_USER_DEPRECATED);
+
+        if ($displayErrors) {
+            $this->throwAt($this->displayErrors, true);
+        } else {
+            $displayErrors = $this->displayErrors;
+            $this->throwAt(0, true);
+            $this->displayErrors = $displayErrors;
+        }
+    }
+
+    /**
+     * Sets a logger for the given channel.
+     *
+     * @param LoggerInterface $logger  A logger interface
+     * @param string          $channel The channel associated with the logger (deprecation, emergency or scream)
+     *
+     * @deprecated since version 2.6, to be removed in 3.0. Use setLoggers() or setDefaultLogger() instead.
+     */
+    public static function setLogger(LoggerInterface $logger, $channel = 'deprecation')
+    {
+        @trigger_error('The '.__METHOD__.' static method is deprecated since Symfony 2.6 and will be removed in 3.0. Use the setLoggers() or setDefaultLogger() methods instead.', E_USER_DEPRECATED);
+
+        $handler = set_error_handler('var_dump');
+        $handler = is_array($handler) ? $handler[0] : null;
+        restore_error_handler();
+        if (!$handler instanceof self) {
+            return;
+        }
+        if ('deprecation' === $channel) {
+            $handler->setDefaultLogger($logger, E_DEPRECATED | E_USER_DEPRECATED, true);
+            $handler->screamAt(E_DEPRECATED | E_USER_DEPRECATED);
+        } elseif ('scream' === $channel) {
+            $handler->setDefaultLogger($logger, E_ALL | E_STRICT, false);
+            $handler->screamAt(E_ALL | E_STRICT);
+        } elseif ('emergency' === $channel) {
+            $handler->setDefaultLogger($logger, E_PARSE | E_ERROR | E_CORE_ERROR | E_COMPILE_ERROR, true);
+            $handler->screamAt(E_PARSE | E_ERROR | E_CORE_ERROR | E_COMPILE_ERROR);
+        }
+    }
+
+    /**
+     * @deprecated since version 2.6, to be removed in 3.0. Use handleError() instead.
+     */
+    public function handle($level, $message, $file = 'unknown', $line = 0, $context = array())
+    {
+        $this->handleError(E_USER_DEPRECATED, 'The '.__METHOD__.' method is deprecated since Symfony 2.6 and will be removed in 3.0. Use the handleError() method instead.', __FILE__, __LINE__, array());
+
+        return $this->handleError($level, $message, $file, $line, (array) $context);
+    }
+
+    /**
+     * Handles PHP fatal errors.
+     *
+     * @deprecated since version 2.6, to be removed in 3.0. Use handleFatalError() instead.
+     */
+    public function handleFatal()
+    {
+        @trigger_error('The '.__METHOD__.' method is deprecated since Symfony 2.6 and will be removed in 3.0. Use the handleFatalError() method instead.', E_USER_DEPRECATED);
+
+        static::handleFatalError();
+    }
+}
+
+/**
+ * Private class used to work around https://bugs.php.net/54275.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ *
+ * @internal
+ */
+class ErrorHandlerCanary
+{
+    private static $displayErrors = null;
+
+    public function __construct()
+    {
+        if (null === self::$displayErrors) {
+            self::$displayErrors = ini_set('display_errors', 1);
+        }
+    }
+
+    public function __destruct()
+    {
+        if (null !== self::$displayErrors) {
+            ini_set('display_errors', self::$displayErrors);
+            self::$displayErrors = null;
+        }
+    }
 }

Exception/DummyException.php

@@ -0,0 +1,23 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Debug\Exception;
+
+@trigger_error('The '.__NAMESPACE__.'\DummyException class is deprecated since Symfony 2.5 and will be removed in 3.0.', E_USER_DEPRECATED);
+
+/**
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since version 2.5, to be removed in 3.0.
+ */
+class DummyException extends \ErrorException
+{
+}

Exception/FatalErrorException.php

@@ -9,14 +9,31 @@
  * file that was distributed with this source code.
  */
 
+namespace Symfony\Component\HttpKernel\Exception;
+
+/**
+ * Fatal Error Exception.
+ *
+ * @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 \ErrorException
+{
+}
+
 namespace Symfony\Component\Debug\Exception;
 
+use Symfony\Component\HttpKernel\Exception\FatalErrorException as LegacyFatalErrorException;
+
 /**
  * Fatal Error Exception.
  *
  * @author Konstanton Myakshin <koc-dp@yandex.ru>
  */
-class FatalErrorException extends \ErrorException
+class FatalErrorException extends LegacyFatalErrorException
 {
     public function __construct($message, $code, $severity, $filename, $lineno, $traceOffset = null, $traceArgs = true, array $trace = null)
     {

Exception/FatalThrowableError.php

@@ -36,7 +36,8 @@ class FatalThrowableError extends FatalErrorException
             $e->getCode(),
             $severity,
             $e->getFile(),
-            $e->getLine()
+            $e->getLine(),
+            $e->getPrevious()
         );
 
         $this->setTrace($e->getTrace());

Exception/FlattenException.php

@@ -9,8 +9,49 @@
  * 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;
 use Symfony\Component\HttpKernel\Exception\HttpExceptionInterface;
 
 /**
@@ -20,7 +61,7 @@ use Symfony\Component\HttpKernel\Exception\HttpExceptionInterface;
  *
  * @author Fabien Potencier <fabien@symfony.com>
  */
-class FlattenException
+class FlattenException extends LegacyFlattenException
 {
     private $message;
     private $code;
@@ -237,10 +278,6 @@ class FlattenException
                 $result[$key] = array('null', null);
             } elseif (is_bool($value)) {
                 $result[$key] = array('boolean', $value);
-            } elseif (is_int($value)) {
-                $result[$key] = array('integer', $value);
-            } elseif (is_float($value)) {
-                $result[$key] = array('float', $value);
             } elseif (is_resource($value)) {
                 $result[$key] = array('resource', get_resource_type($value));
             } else {

Exception/SilencedErrorContext.php

@@ -1,55 +0,0 @@
-<?php
-
-/*
- * This file is part of the Symfony package.
- *
- * (c) Fabien Potencier <fabien@symfony.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-namespace Symfony\Component\Debug\Exception;
-
-/**
- * Data Object that represents a Silenced Error.
- *
- * @author Grégoire Pineau <lyrixx@lyrixx.info>
- */
-class SilencedErrorContext implements \JsonSerializable
-{
-    private $severity;
-    private $file;
-    private $line;
-
-    public function __construct($severity, $file, $line)
-    {
-        $this->severity = $severity;
-        $this->file = $file;
-        $this->line = $line;
-    }
-
-    public function getSeverity()
-    {
-        return $this->severity;
-    }
-
-    public function getFile()
-    {
-        return $this->file;
-    }
-
-    public function getLine()
-    {
-        return $this->line;
-    }
-
-    public function JsonSerialize()
-    {
-        return array(
-            'severity' => $this->severity,
-            'file' => $this->file,
-            'line' => $this->line,
-        );
-    }
-}

ExceptionHandler.php

@@ -11,9 +11,9 @@
 
 namespace Symfony\Component\Debug;
 
+use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\Debug\Exception\FlattenException;
 use Symfony\Component\Debug\Exception\OutOfMemoryException;
-use Symfony\Component\HttpKernel\Debug\FileLinkFormatter;
 
 /**
  * ExceptionHandler converts an exception to a Response object.
@@ -38,6 +38,12 @@ class ExceptionHandler
 
     public function __construct($debug = true, $charset = null, $fileLinkFormat = null)
     {
+        if (false !== strpos($charset, '%')) {
+            // Swap $charset and $fileLinkFormat for BC reasons
+            $pivot = $fileLinkFormat;
+            $fileLinkFormat = $charset;
+            $charset = $pivot;
+        }
         $this->debug = $debug;
         $this->charset = $charset ?: ini_get('default_charset') ?: 'UTF-8';
         $this->fileLinkFormat = $fileLinkFormat ?: ini_get('xdebug.file_link_format') ?: get_cfg_var('xdebug.file_link_format');
@@ -72,8 +78,11 @@ class ExceptionHandler
      *
      * @return callable|null The previous exception handler if any
      */
-    public function setHandler(callable $handler = null)
+    public function setHandler($handler)
     {
+        if (null !== $handler && !is_callable($handler)) {
+            throw new \LogicException('The exception handler must be a valid PHP callable.');
+        }
         $old = $this->handler;
         $this->handler = $handler;
 
@@ -83,14 +92,14 @@ class ExceptionHandler
     /**
      * Sets the format for links to source files.
      *
-     * @param string|FileLinkFormatter $format The format for links to source files
+     * @param string $format The format for links to source files
      *
      * @return string The previous file link format
      */
-    public function setFileLinkFormat($fileLinkFormat)
+    public function setFileLinkFormat($format)
     {
         $old = $this->fileLinkFormat;
-        $this->fileLinkFormat = $fileLinkFormat;
+        $this->fileLinkFormat = $format;
 
         return $old;
     }
@@ -106,36 +115,20 @@ class ExceptionHandler
     public function handle(\Exception $exception)
     {
         if (null === $this->handler || $exception instanceof OutOfMemoryException) {
-            $this->sendPhpResponse($exception);
+            $this->failSafeHandle($exception);
 
             return;
         }
 
         $caughtLength = $this->caughtLength = 0;
 
-        ob_start(function ($buffer) {
-            $this->caughtBuffer = $buffer;
-
-            return '';
-        });
-
-        $this->sendPhpResponse($exception);
+        ob_start(array($this, 'catchOutput'));
+        $this->failSafeHandle($exception);
         while (null === $this->caughtBuffer && ob_end_flush()) {
             // Empty loop, everything is in the condition
         }
         if (isset($this->caughtBuffer[0])) {
-            ob_start(function ($buffer) {
-                if ($this->caughtLength) {
-                    // use substr_replace() instead of substr() for mbstring overloading resistance
-                    $cleanBuffer = substr_replace($buffer, '', 0, $this->caughtLength);
-                    if (isset($cleanBuffer[0])) {
-                        $buffer = $cleanBuffer;
-                    }
-                }
-
-                return $buffer;
-            });
-
+            ob_start(array($this, 'cleanOutput'));
             echo $this->caughtBuffer;
             $caughtLength = ob_get_length();
         }
@@ -152,13 +145,37 @@ class ExceptionHandler
         }
     }
 
+    /**
+     * Sends a response for the given Exception.
+     *
+     * If you have the Symfony HttpFoundation component installed,
+     * this method will use it to create and send the response. If not,
+     * it will fallback to plain PHP functions.
+     */
+    private function failSafeHandle(\Exception $exception)
+    {
+        if (class_exists('Symfony\Component\HttpFoundation\Response', false)
+            && __CLASS__ !== get_class($this)
+            && ($reflector = new \ReflectionMethod($this, 'createResponse'))
+            && __CLASS__ !== $reflector->class
+        ) {
+            $response = $this->createResponse($exception);
+            $response->sendHeaders();
+            $response->sendContent();
+
+            return;
+        }
+
+        $this->sendPhpResponse($exception);
+    }
+
     /**
      * Sends the error associated with the given Exception as a plain PHP response.
      *
      * This method uses plain PHP functions like header() and echo to output
      * the response.
      *
-     * @param \Exception|FlattenException $exception An \Exception or FlattenException instance
+     * @param \Exception|FlattenException $exception An \Exception instance
      */
     public function sendPhpResponse($exception)
     {
@@ -178,26 +195,24 @@ class ExceptionHandler
     }
 
     /**
-     * Gets the full HTML content associated with the given exception.
+     * Creates the error Response associated with the given Exception.
      *
-     * @param \Exception|FlattenException $exception An \Exception or FlattenException instance
+     * @param \Exception|FlattenException $exception An \Exception instance
      *
-     * @return string The HTML content as a string
+     * @return Response A Response instance
      */
-    public function getHtml($exception)
+    public function createResponse($exception)
     {
         if (!$exception instanceof FlattenException) {
             $exception = FlattenException::create($exception);
         }
 
-        return $this->decorate($this->getContent($exception), $this->getStylesheet($exception));
+        return Response::create($this->decorate($this->getContent($exception), $this->getStylesheet($exception)), $exception->getStatusCode(), $exception->getHeaders())->setCharset($this->charset);
     }
 
     /**
      * Gets the HTML content associated with the given exception.
      *
-     * @param FlattenException $exception A FlattenException instance
-     *
      * @return string The content as a string
      */
     public function getContent(FlattenException $exception)
@@ -264,8 +279,6 @@ EOF;
     /**
      * Gets the stylesheet associated with the given exception.
      *
-     * @param FlattenException $exception A FlattenException instance
-     *
      * @return string The stylesheet as a string
      */
     public function getStylesheet(FlattenException $exception)
@@ -291,6 +304,10 @@ EOF;
             .sf-reset .exception_message { margin-left: 3em; display: block; }
             .sf-reset .traces li { font-size:12px; padding: 2px 4px; list-style-type:decimal; margin-left:20px; }
             .sf-reset .block { background-color:#FFFFFF; padding:10px 28px; margin-bottom:20px;
+                -webkit-border-bottom-right-radius: 16px;
+                -webkit-border-bottom-left-radius: 16px;
+                -moz-border-radius-bottomright: 16px;
+                -moz-border-radius-bottomleft: 16px;
                 border-bottom-right-radius: 16px;
                 border-bottom-left-radius: 16px;
                 border-bottom:1px solid #ccc;
@@ -299,6 +316,10 @@ EOF;
                 word-wrap: break-word;
             }
             .sf-reset .block_exception { background-color:#ddd; color: #333; padding:20px;
+                -webkit-border-top-left-radius: 16px;
+                -webkit-border-top-right-radius: 16px;
+                -moz-border-radius-topleft: 16px;
+                -moz-border-radius-topright: 16px;
                 border-top-left-radius: 16px;
                 border-top-right-radius: 16px;
                 border-top:1px solid #ccc;
@@ -311,6 +332,8 @@ EOF;
             .sf-reset a:hover { background:none; color:#313131; text-decoration:underline; }
             .sf-reset ol { padding: 10px 0; }
             .sf-reset h1 { background-color:#FFFFFF; padding: 15px 28px; margin-bottom: 20px;
+                -webkit-border-radius: 10px;
+                -moz-border-radius: 10px;
                 border-radius: 10px;
                 border: 1px solid #ccc;
             }
@@ -335,7 +358,7 @@ EOF;
             $css
         </style>
     </head>
-    <body ondblclick="var t = event.target; if (t.title && !t.href) { var f = t.innerHTML; t.innerHTML = t.title; t.title = f; }">
+    <body>
         $content
     </body>
 </html>
@@ -351,14 +374,16 @@ EOF;
 
     private function formatPath($path, $line)
     {
-        $file = $this->escapeHtml(preg_match('#[^/\\\\]*+$#', $path, $file) ? $file[0] : $path);
-        $fmt = $this->fileLinkFormat;
+        $path = $this->escapeHtml($path);
+        $file = preg_match('#[^/\\\\]*$#', $path, $file) ? $file[0] : $path;
 
-        if ($fmt && $link = is_string($fmt) ? strtr($fmt, array('%f' => $path, '%l' => $line)) : $fmt->format($path, $line)) {
-            return sprintf(' in <a href="%s" title="Go to source">%s line %d</a>', $this->escapeHtml($link), $file, $line);
+        if ($linkFormat = $this->fileLinkFormat) {
+            $link = strtr($this->escapeHtml($linkFormat), array('%f' => $path, '%l' => (int) $line));
+
+            return sprintf(' in <a href="%s" title="Go to source">%s line %d</a>', $link, $file, $line);
         }
 
-        return sprintf(' in <a title="%s line %3$d">%s line %d</a>', $this->escapeHtml($path), $file, $line);
+        return sprintf(' in <a title="%s line %3$d" ondblclick="var f=this.innerHTML;this.innerHTML=this.title;this.title=f;">%s line %d</a>', $path, $file, $line);
     }
 
     /**
@@ -376,6 +401,8 @@ EOF;
                 $formattedValue = sprintf('<em>object</em>(%s)', $this->formatClass($item[1]));
             } elseif ('array' === $item[0]) {
                 $formattedValue = sprintf('<em>array</em>(%s)', is_array($item[1]) ? $this->formatArgs($item[1]) : $item[1]);
+            } elseif ('string' === $item[0]) {
+                $formattedValue = sprintf("'%s'", $this->escapeHtml($item[1]));
             } elseif ('null' === $item[0]) {
                 $formattedValue = '<em>null</em>';
             } elseif ('boolean' === $item[0]) {
@@ -383,20 +410,58 @@ EOF;
             } elseif ('resource' === $item[0]) {
                 $formattedValue = '<em>resource</em>';
             } else {
-                $formattedValue = str_replace("\n", '', $this->escapeHtml(var_export($item[1], true)));
+                $formattedValue = str_replace("\n", '', var_export($this->escapeHtml((string) $item[1]), true));
             }
 
-            $result[] = is_int($key) ? $formattedValue : sprintf("'%s' => %s", $key, $formattedValue);
+            $result[] = is_int($key) ? $formattedValue : sprintf("'%s' => %s", $this->escapeHtml($key), $formattedValue);
         }
 
         return implode(', ', $result);
     }
 
+    /**
+     * Returns an UTF-8 and HTML encoded string.
+     *
+     * @deprecated since version 2.7, to be removed in 3.0.
+     */
+    protected static function utf8Htmlize($str)
+    {
+        @trigger_error('The '.__METHOD__.' method is deprecated since Symfony 2.7 and will be removed in 3.0.', E_USER_DEPRECATED);
+
+        return htmlspecialchars($str, ENT_QUOTES | (\PHP_VERSION_ID >= 50400 ? ENT_SUBSTITUTE : 0), 'UTF-8');
+    }
+
     /**
      * HTML-encodes a string.
      */
     private function escapeHtml($str)
     {
-        return htmlspecialchars($str, ENT_COMPAT | ENT_SUBSTITUTE, $this->charset);
+        return htmlspecialchars($str, ENT_QUOTES | (\PHP_VERSION_ID >= 50400 ? ENT_SUBSTITUTE : 0), $this->charset);
+    }
+
+    /**
+     * @internal
+     */
+    public function catchOutput($buffer)
+    {
+        $this->caughtBuffer = $buffer;
+
+        return '';
+    }
+
+    /**
+     * @internal
+     */
+    public function cleanOutput($buffer)
+    {
+        if ($this->caughtLength) {
+            // use substr_replace() instead of substr() for mbstring overloading resistance
+            $cleanBuffer = substr_replace($buffer, '', 0, $this->caughtLength);
+            if (isset($cleanBuffer[0])) {
+                $buffer = $cleanBuffer;
+            }
+        }
+
+        return $buffer;
     }
 }

FatalErrorHandler/ClassNotFoundFatalErrorHandler.php

@@ -16,6 +16,7 @@ use Symfony\Component\Debug\Exception\FatalErrorException;
 use Symfony\Component\Debug\DebugClassLoader;
 use Composer\Autoload\ClassLoader as ComposerClassLoader;
 use Symfony\Component\ClassLoader\ClassLoader as SymfonyClassLoader;
+use Symfony\Component\ClassLoader\UniversalClassLoader as SymfonyUniversalClassLoader;
 
 /**
  * ErrorHandler for classes that do not exist.
@@ -100,12 +101,17 @@ class ClassNotFoundFatalErrorHandler implements FatalErrorHandlerInterface
             if ($function[0] instanceof DebugClassLoader) {
                 $function = $function[0]->getClassLoader();
 
+                // @deprecated since version 2.5. Returning an object from DebugClassLoader::getClassLoader() is deprecated.
+                if (is_object($function)) {
+                    $function = array($function);
+                }
+
                 if (!is_array($function)) {
                     continue;
                 }
             }
 
-            if ($function[0] instanceof ComposerClassLoader || $function[0] instanceof SymfonyClassLoader) {
+            if ($function[0] instanceof ComposerClassLoader || $function[0] instanceof SymfonyClassLoader || $function[0] instanceof SymfonyUniversalClassLoader) {
                 foreach ($function[0]->getPrefixes() as $prefix => $paths) {
                     foreach ($paths as $path) {
                         $classes = array_merge($classes, $this->findClassInPath($path, $class, $prefix));
@@ -201,6 +207,6 @@ class ClassNotFoundFatalErrorHandler implements FatalErrorHandlerInterface
      */
     private function classExists($class)
     {
-        return class_exists($class, false) || interface_exists($class, false) || trait_exists($class, false);
+        return class_exists($class, false) || interface_exists($class, false) || (function_exists('trait_exists') && trait_exists($class, false));
     }
 }

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2004-2017 Fabien Potencier
+Copyright (c) 2004-2018 Fabien Potencier
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

Resources/ext/tests/001.phpt

@@ -1,7 +1,9 @@
 --TEST--
 Test symfony_zval_info API
 --SKIPIF--
-<?php if (!extension_loaded('symfony_debug')) print 'skip'; ?>
+<?php if (!extension_loaded('symfony_debug')) {
+    echo 'skip';
+} ?>
 --FILE--
 <?php
 

Resources/ext/tests/002.phpt

@@ -1,7 +1,9 @@
 --TEST--
 Test symfony_debug_backtrace in case of fatal error
 --SKIPIF--
-<?php if (!extension_loaded('symfony_debug')) print 'skip'; ?>
+<?php if (!extension_loaded('symfony_debug')) {
+    echo 'skip';
+} ?>
 --FILE--
 <?php
 

Resources/ext/tests/002_1.phpt

@@ -1,7 +1,9 @@
 --TEST--
 Test symfony_debug_backtrace in case of non fatal error
 --SKIPIF--
-<?php if (!extension_loaded('symfony_debug')) print 'skip'; ?>
+<?php if (!extension_loaded('symfony_debug')) {
+    echo 'skip';
+} ?>
 --FILE--
 <?php
 

Resources/ext/tests/003.phpt

@@ -1,7 +1,9 @@
 --TEST--
 Test ErrorHandler in case of fatal error
 --SKIPIF--
-<?php if (!extension_loaded('symfony_debug')) print 'skip'; ?>
+<?php if (!extension_loaded('symfony_debug')) {
+    echo 'skip';
+} ?>
 --FILE--
 <?php
 

Tests/DebugClassLoaderTest.php

@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Debug\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Debug\DebugClassLoader;
 use Symfony\Component\Debug\ErrorHandler;
 
-class DebugClassLoaderTest extends \PHPUnit_Framework_TestCase
+class DebugClassLoaderTest extends TestCase
 {
     /**
      * @var int Error reporting level before running tests
@@ -25,7 +26,7 @@ class DebugClassLoaderTest extends \PHPUnit_Framework_TestCase
 
     protected function setUp()
     {
-        $this->errorReporting = error_reporting(E_ALL);
+        $this->errorReporting = error_reporting(E_ALL | E_STRICT);
         $this->loader = new ClassLoader();
         spl_autoload_register(array($this->loader, 'loadClass'), true, true);
         DebugClassLoader::enable();
@@ -58,9 +59,26 @@ class DebugClassLoaderTest extends \PHPUnit_Framework_TestCase
         $this->fail('DebugClassLoader did not register');
     }
 
+    /**
+     * @expectedException \Exception
+     * @expectedExceptionMessage boo
+     */
+    public function testThrowingClass()
+    {
+        try {
+            class_exists(__NAMESPACE__.'\Fixtures\Throwing');
+            $this->fail('Exception expected');
+        } catch (\Exception $e) {
+            $this->assertSame('boo', $e->getMessage());
+        }
+
+        // the second call also should throw
+        class_exists(__NAMESPACE__.'\Fixtures\Throwing');
+    }
+
     public function testUnsilencing()
     {
-        if (PHP_VERSION_ID >= 70000) {
+        if (\PHP_VERSION_ID >= 70000) {
             $this->markTestSkipped('PHP7 throws exceptions, unsilencing is not required anymore.');
         }
         if (defined('HHVM_VERSION')) {
@@ -107,22 +125,27 @@ class DebugClassLoaderTest extends \PHPUnit_Framework_TestCase
             $this->fail('ContextErrorException expected');
         } catch (\ErrorException $exception) {
             // if an exception is thrown, the test passed
+            restore_error_handler();
+            restore_exception_handler();
             $this->assertStringStartsWith(__FILE__, $exception->getFile());
-            if (PHP_VERSION_ID < 70000) {
+            if (\PHP_VERSION_ID < 70000) {
                 $this->assertRegExp('/^Runtime Notice: Declaration/', $exception->getMessage());
                 $this->assertEquals(E_STRICT, $exception->getSeverity());
             } else {
                 $this->assertRegExp('/^Warning: Declaration/', $exception->getMessage());
                 $this->assertEquals(E_WARNING, $exception->getSeverity());
             }
-        } finally {
+        } catch (\Exception $exception) {
             restore_error_handler();
             restore_exception_handler();
+
+            throw $exception;
         }
     }
 
     /**
      * @expectedException \RuntimeException
+     * @expectedExceptionMessage Case mismatch between loaded and declared class names
      */
     public function testNameCaseMismatch()
     {
@@ -144,6 +167,7 @@ class DebugClassLoaderTest extends \PHPUnit_Framework_TestCase
 
     /**
      * @expectedException \RuntimeException
+     * @expectedExceptionMessage Case mismatch between loaded and declared class names
      */
     public function testPsr4CaseMismatch()
     {
@@ -184,7 +208,7 @@ class DebugClassLoaderTest extends \PHPUnit_Framework_TestCase
 
         $xError = array(
             'type' => E_USER_DEPRECATED,
-            'message' => 'The Test\Symfony\Component\Debug\Tests\\'.$class.' class '.$type.' Symfony\Component\Debug\Tests\Fixtures\\'.$super.' that is deprecated but this is a test deprecation notice.',
+            'message' => 'The Test\Symfony\Component\Debug\Tests\\'.$class.' class '.$type.' Symfony\Component\Debug\Tests\Fixtures\\'.$super.' that is deprecated but this is a test deprecation notice',
         );
 
         $this->assertSame($xError, $lastError);
@@ -198,28 +222,6 @@ class DebugClassLoaderTest extends \PHPUnit_Framework_TestCase
         );
     }
 
-    public function testInterfaceExtendsDeprecatedInterface()
-    {
-        set_error_handler(function () { return false; });
-        $e = error_reporting(0);
-        trigger_error('', E_USER_NOTICE);
-
-        class_exists('Test\\'.__NAMESPACE__.'\\NonDeprecatedInterfaceClass', true);
-
-        error_reporting($e);
-        restore_error_handler();
-
-        $lastError = error_get_last();
-        unset($lastError['file'], $lastError['line']);
-
-        $xError = array(
-            'type' => E_USER_NOTICE,
-            'message' => '',
-        );
-
-        $this->assertSame($xError, $lastError);
-    }
-
     public function testDeprecatedSuperInSameNamespace()
     {
         set_error_handler(function () { return false; });
@@ -244,7 +246,7 @@ class DebugClassLoaderTest extends \PHPUnit_Framework_TestCase
 
     public function testReservedForPhp7()
     {
-        if (PHP_VERSION_ID >= 70000) {
+        if (\PHP_VERSION_ID >= 70000) {
             $this->markTestSkipped('PHP7 already prevents using reserved names.');
         }
 
@@ -306,8 +308,6 @@ class ClassLoader
             eval('namespace Test\\'.__NAMESPACE__.'; class DeprecatedParentClass extends \\'.__NAMESPACE__.'\Fixtures\DeprecatedClass {}');
         } elseif ('Test\\'.__NAMESPACE__.'\DeprecatedInterfaceClass' === $class) {
             eval('namespace Test\\'.__NAMESPACE__.'; class DeprecatedInterfaceClass implements \\'.__NAMESPACE__.'\Fixtures\DeprecatedInterface {}');
-        } elseif ('Test\\'.__NAMESPACE__.'\NonDeprecatedInterfaceClass' === $class) {
-            eval('namespace Test\\'.__NAMESPACE__.'; class NonDeprecatedInterfaceClass implements \\'.__NAMESPACE__.'\Fixtures\NonDeprecatedInterface {}');
         } elseif ('Test\\'.__NAMESPACE__.'\Float' === $class) {
             eval('namespace Test\\'.__NAMESPACE__.'; class Float {}');
         }

Tests/ErrorHandlerTest.php

@@ -11,11 +11,10 @@
 
 namespace Symfony\Component\Debug\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Psr\Log\LogLevel;
-use Symfony\Component\Debug\BufferingLogger;
 use Symfony\Component\Debug\ErrorHandler;
 use Symfony\Component\Debug\Exception\ContextErrorException;
-use Symfony\Component\Debug\Exception\SilencedErrorContext;
 
 /**
  * ErrorHandlerTest.
@@ -23,7 +22,7 @@ use Symfony\Component\Debug\Exception\SilencedErrorContext;
  * @author Robert Schönthal <seroscho@googlemail.com>
  * @author Nicolas Grekas <p@tchwork.com>
  */
-class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
+class ErrorHandlerTest extends TestCase
 {
     public function testRegister()
     {
@@ -35,7 +34,7 @@ class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
 
             $newHandler = new ErrorHandler();
 
-            $this->assertSame($newHandler, ErrorHandler::register($newHandler, false));
+            $this->assertSame($handler, ErrorHandler::register($newHandler, false));
             $h = set_error_handler('var_dump');
             restore_error_handler();
             $this->assertSame(array($handler, 'handleError'), $h);
@@ -65,6 +64,30 @@ class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
         }
     }
 
+    public function testErrorGetLast()
+    {
+        $handler = ErrorHandler::register();
+        $logger = $this->getMockBuilder('Psr\Log\LoggerInterface')->getMock();
+        $handler->setDefaultLogger($logger);
+        $handler->screamAt(E_ALL);
+
+        try {
+            @trigger_error('Hello', E_USER_WARNING);
+            $expected = array(
+                'type' => E_USER_WARNING,
+                'message' => 'Hello',
+                'file' => __FILE__,
+                'line' => __LINE__ - 5,
+            );
+            $this->assertSame($expected, error_get_last());
+        } catch (\Exception $e) {
+            restore_error_handler();
+            restore_exception_handler();
+
+            throw $e;
+        }
+    }
+
     public function testNotice()
     {
         ErrorHandler::register();
@@ -74,25 +97,36 @@ class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
             $this->fail('ContextErrorException expected');
         } catch (ContextErrorException $exception) {
             // if an exception is thrown, the test passed
+            restore_error_handler();
+            restore_exception_handler();
+
             $this->assertEquals(E_NOTICE, $exception->getSeverity());
             $this->assertEquals(__FILE__, $exception->getFile());
             $this->assertRegExp('/^Notice: Undefined variable: (foo|bar)/', $exception->getMessage());
-            $this->assertArrayHasKey('foobar', $exception->getContext());
+            if (\PHP_VERSION_ID < 70200) {
+                $this->assertArrayHasKey('foobar', $exception->getContext());
+            }
 
             $trace = $exception->getTrace();
-
             $this->assertEquals(__FILE__, $trace[0]['file']);
-            $this->assertEquals(__CLASS__, $trace[0]['class']);
-            $this->assertEquals('triggerNotice', $trace[0]['function']);
-            $this->assertEquals('::', $trace[0]['type']);
+            $this->assertEquals('Symfony\Component\Debug\ErrorHandler', $trace[0]['class']);
+            $this->assertEquals('handleError', $trace[0]['function']);
+            $this->assertEquals('->', $trace[0]['type']);
 
-            $this->assertEquals(__FILE__, $trace[0]['file']);
+            $this->assertEquals(__FILE__, $trace[1]['file']);
             $this->assertEquals(__CLASS__, $trace[1]['class']);
-            $this->assertEquals(__FUNCTION__, $trace[1]['function']);
-            $this->assertEquals('->', $trace[1]['type']);
-        } finally {
+            $this->assertEquals('triggerNotice', $trace[1]['function']);
+            $this->assertEquals('::', $trace[1]['type']);
+
+            $this->assertEquals(__FILE__, $trace[1]['file']);
+            $this->assertEquals(__CLASS__, $trace[2]['class']);
+            $this->assertEquals(__FUNCTION__, $trace[2]['function']);
+            $this->assertEquals('->', $trace[2]['type']);
+        } catch (\Exception $e) {
             restore_error_handler();
             restore_exception_handler();
+
+            throw $e;
         }
     }
 
@@ -110,9 +144,14 @@ class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
             $handler = ErrorHandler::register();
             $handler->throwAt(3, true);
             $this->assertEquals(3 | E_RECOVERABLE_ERROR | E_USER_ERROR, $handler->throwAt(0));
-        } finally {
+
             restore_error_handler();
             restore_exception_handler();
+        } catch (\Exception $e) {
+            restore_error_handler();
+            restore_exception_handler();
+
+            throw $e;
         }
     }
 
@@ -144,9 +183,14 @@ class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
                 E_CORE_ERROR => array(null, LogLevel::CRITICAL),
             );
             $this->assertSame($loggers, $handler->setLoggers(array()));
-        } finally {
+
             restore_error_handler();
             restore_exception_handler();
+        } catch (\Exception $e) {
+            restore_error_handler();
+            restore_exception_handler();
+
+            throw $e;
         }
     }
 
@@ -197,14 +241,14 @@ class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
 
             $logger = $this->getMockBuilder('Psr\Log\LoggerInterface')->getMock();
 
-            $warnArgCheck = function ($logLevel, $message, $context) {
-                $this->assertEquals('info', $logLevel);
-                $this->assertEquals('User Deprecated: foo', $message);
-                $this->assertArrayHasKey('exception', $context);
-                $exception = $context['exception'];
-                $this->assertInstanceOf(\ErrorException::class, $exception);
-                $this->assertSame('User Deprecated: foo', $exception->getMessage());
-                $this->assertSame(E_USER_DEPRECATED, $exception->getSeverity());
+            $that = $this;
+            $warnArgCheck = function ($logLevel, $message, $context) use ($that) {
+                $that->assertEquals('info', $logLevel);
+                $that->assertEquals('foo', $message);
+                $that->assertArrayHasKey('type', $context);
+                $that->assertEquals($context['type'], E_USER_DEPRECATED);
+                $that->assertArrayHasKey('stack', $context);
+                $that->assertInternalType('array', $context['stack']);
             };
 
             $logger
@@ -222,12 +266,11 @@ class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
 
             $logger = $this->getMockBuilder('Psr\Log\LoggerInterface')->getMock();
 
-            $logArgCheck = function ($level, $message, $context) {
-                $this->assertEquals('Notice: Undefined variable: undefVar', $message);
-                $this->assertArrayHasKey('exception', $context);
-                $exception = $context['exception'];
-                $this->assertInstanceOf(SilencedErrorContext::class, $exception);
-                $this->assertSame(E_NOTICE, $exception->getSeverity());
+            $that = $this;
+            $logArgCheck = function ($level, $message, $context) use ($that) {
+                $that->assertEquals('Undefined variable: undefVar', $message);
+                $that->assertArrayHasKey('type', $context);
+                $that->assertEquals($context['type'], E_NOTICE);
             };
 
             $logger
@@ -252,36 +295,14 @@ class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
         }
     }
 
-    public function testHandleUserError()
-    {
-        try {
-            $handler = ErrorHandler::register();
-            $handler->throwAt(0, true);
-
-            $e = null;
-            $x = new \Exception('Foo');
-
-            try {
-                $f = new Fixtures\ToStringThrower($x);
-                $f .= ''; // Trigger $f->__toString()
-            } catch (\Exception $e) {
-            }
-
-            $this->assertSame($x, $e);
-        } finally {
-            restore_error_handler();
-            restore_exception_handler();
-        }
-    }
-
     public function testHandleDeprecation()
     {
-        $logArgCheck = function ($level, $message, $context) {
-            $this->assertEquals(LogLevel::INFO, $level);
-            $this->assertArrayHasKey('exception', $context);
-            $exception = $context['exception'];
-            $this->assertInstanceOf(\ErrorException::class, $exception);
-            $this->assertSame('User Deprecated: Foo deprecation', $exception->getMessage());
+        $that = $this;
+        $logArgCheck = function ($level, $message, $context) use ($that) {
+            $that->assertEquals(LogLevel::INFO, $level);
+            $that->assertArrayHasKey('level', $context);
+            $that->assertEquals(E_RECOVERABLE_ERROR | E_USER_ERROR | E_DEPRECATED | E_USER_DEPRECATED, $context['level']);
+            $that->assertArrayHasKey('stack', $context);
         };
 
         $logger = $this->getMockBuilder('Psr\Log\LoggerInterface')->getMock();
@@ -296,6 +317,9 @@ class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
         @$handler->handleError(E_USER_DEPRECATED, 'Foo deprecation', __FILE__, __LINE__, array());
     }
 
+    /**
+     * @group no-hhvm
+     */
     public function testHandleException()
     {
         try {
@@ -305,10 +329,11 @@ class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
 
             $logger = $this->getMockBuilder('Psr\Log\LoggerInterface')->getMock();
 
-            $logArgCheck = function ($level, $message, $context) {
-                $this->assertSame('Uncaught Exception: foo', $message);
-                $this->assertArrayHasKey('exception', $context);
-                $this->assertInstanceOf(\Exception::class, $context['exception']);
+            $that = $this;
+            $logArgCheck = function ($level, $message, $context) use ($that) {
+                $that->assertEquals('Uncaught Exception: foo', $message);
+                $that->assertArrayHasKey('type', $context);
+                $that->assertEquals($context['type'], E_ERROR);
             };
 
             $logger
@@ -326,14 +351,20 @@ class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
                 $this->assertSame($exception, $e);
             }
 
-            $handler->setExceptionHandler(function ($e) use ($exception) {
-                $this->assertSame($exception, $e);
+            $that = $this;
+            $handler->setExceptionHandler(function ($e) use ($exception, $that) {
+                $that->assertSame($exception, $e);
             });
 
             $handler->handleException($exception);
-        } finally {
+
             restore_error_handler();
             restore_exception_handler();
+        } catch (\Exception $e) {
+            restore_error_handler();
+            restore_exception_handler();
+
+            throw $e;
         }
     }
 
@@ -350,7 +381,7 @@ class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
                 ->method('log')
                 ->withConsecutive(
                     array($this->equalTo(LogLevel::WARNING), $this->equalTo('Dummy log')),
-                    array($this->equalTo(LogLevel::DEBUG), $this->equalTo('User Warning: Silenced warning'))
+                    array($this->equalTo(LogLevel::DEBUG), $this->equalTo('Silenced warning'))
                 )
             ;
 
@@ -360,82 +391,20 @@ class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
             @trigger_error('Silenced warning', E_USER_WARNING);
             $logger->log(LogLevel::WARNING, 'Dummy log');
             ErrorHandler::unstackErrors();
-        } finally {
+
             restore_error_handler();
             restore_exception_handler();
+        } catch (\Exception $e) {
+            restore_error_handler();
+            restore_exception_handler();
+
+            throw $e;
         }
     }
 
-    public function testBootstrappingLogger()
-    {
-        $bootLogger = new BufferingLogger();
-        $handler = new ErrorHandler($bootLogger);
-
-        $loggers = array(
-            E_DEPRECATED => array($bootLogger, LogLevel::INFO),
-            E_USER_DEPRECATED => array($bootLogger, LogLevel::INFO),
-            E_NOTICE => array($bootLogger, LogLevel::WARNING),
-            E_USER_NOTICE => array($bootLogger, LogLevel::WARNING),
-            E_STRICT => array($bootLogger, LogLevel::WARNING),
-            E_WARNING => array($bootLogger, LogLevel::WARNING),
-            E_USER_WARNING => array($bootLogger, LogLevel::WARNING),
-            E_COMPILE_WARNING => array($bootLogger, LogLevel::WARNING),
-            E_CORE_WARNING => array($bootLogger, LogLevel::WARNING),
-            E_USER_ERROR => array($bootLogger, LogLevel::CRITICAL),
-            E_RECOVERABLE_ERROR => array($bootLogger, LogLevel::CRITICAL),
-            E_COMPILE_ERROR => array($bootLogger, LogLevel::CRITICAL),
-            E_PARSE => array($bootLogger, LogLevel::CRITICAL),
-            E_ERROR => array($bootLogger, LogLevel::CRITICAL),
-            E_CORE_ERROR => array($bootLogger, LogLevel::CRITICAL),
-        );
-
-        $this->assertSame($loggers, $handler->setLoggers(array()));
-
-        $handler->handleError(E_DEPRECATED, 'Foo message', __FILE__, 123, array());
-
-        $logs = $bootLogger->cleanLogs();
-
-        $this->assertCount(1, $logs);
-        $log = $logs[0];
-        $this->assertSame('info', $log[0]);
-        $this->assertSame('Deprecated: Foo message', $log[1]);
-        $this->assertArrayHasKey('exception', $log[2]);
-        $exception = $log[2]['exception'];
-        $this->assertInstanceOf(\ErrorException::class, $exception);
-        $this->assertSame('Deprecated: Foo message', $exception->getMessage());
-        $this->assertSame(__FILE__, $exception->getFile());
-        $this->assertSame(123, $exception->getLine());
-        $this->assertSame(E_DEPRECATED, $exception->getSeverity());
-
-        $bootLogger->log(LogLevel::WARNING, 'Foo message', array('exception' => $exception));
-
-        $mockLogger = $this->getMockBuilder('Psr\Log\LoggerInterface')->getMock();
-        $mockLogger->expects($this->once())
-            ->method('log')
-            ->with(LogLevel::WARNING, 'Foo message', array('exception' => $exception));
-
-        $handler->setLoggers(array(E_DEPRECATED => array($mockLogger, LogLevel::WARNING)));
-    }
-
-    public function testSettingLoggerWhenExceptionIsBuffered()
-    {
-        $bootLogger = new BufferingLogger();
-        $handler = new ErrorHandler($bootLogger);
-
-        $exception = new \Exception('Foo message');
-
-        $mockLogger = $this->getMockBuilder('Psr\Log\LoggerInterface')->getMock();
-        $mockLogger->expects($this->once())
-            ->method('log')
-            ->with(LogLevel::CRITICAL, 'Uncaught Exception: Foo message', array('exception' => $exception));
-
-        $handler->setExceptionHandler(function () use ($handler, $mockLogger) {
-            $handler->setDefaultLogger($mockLogger);
-        });
-
-        $handler->handleException($exception);
-    }
-
+    /**
+     * @group no-hhvm
+     */
     public function testHandleFatalError()
     {
         try {
@@ -450,10 +419,11 @@ class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
 
             $logger = $this->getMockBuilder('Psr\Log\LoggerInterface')->getMock();
 
-            $logArgCheck = function ($level, $message, $context) {
-                $this->assertEquals('Fatal Parse Error: foo', $message);
-                $this->assertArrayHasKey('exception', $context);
-                $this->assertInstanceOf(\Exception::class, $context['exception']);
+            $that = $this;
+            $logArgCheck = function ($level, $message, $context) use ($that) {
+                $that->assertEquals('Fatal Parse Error: foo', $message);
+                $that->assertArrayHasKey('type', $context);
+                $that->assertEquals($context['type'], E_PARSE);
             };
 
             $logger
@@ -494,6 +464,9 @@ class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
         $this->assertStringStartsWith("Attempted to load class \"Foo\" from the global namespace.\nDid you forget a \"use\" statement", $args[0]->getMessage());
     }
 
+    /**
+     * @group no-hhvm
+     */
     public function testHandleFatalErrorOnHHVM()
     {
         try {
@@ -505,7 +478,14 @@ class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
                 ->method('log')
                 ->with(
                     $this->equalTo(LogLevel::CRITICAL),
-                    $this->equalTo('Fatal Error: foo')
+                    $this->equalTo('Fatal Error: foo'),
+                    $this->equalTo(array(
+                        'type' => 1,
+                        'file' => 'bar',
+                        'line' => 123,
+                        'level' => -1,
+                        'stack' => array(456),
+                    ))
                 )
             ;
 
@@ -522,9 +502,70 @@ class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
 
             call_user_func_array(array($handler, 'handleError'), $error);
             $handler->handleFatalError($error);
-        } finally {
+
             restore_error_handler();
             restore_exception_handler();
+        } catch (\Exception $e) {
+            restore_error_handler();
+            restore_exception_handler();
+
+            throw $e;
         }
     }
+
+    /**
+     * @group legacy
+     */
+    public function testLegacyInterface()
+    {
+        try {
+            $handler = ErrorHandler::register(0);
+            $this->assertFalse($handler->handle(0, 'foo', 'foo.php', 12, array()));
+
+            restore_error_handler();
+            restore_exception_handler();
+
+            $logger = $this->getMockBuilder('Psr\Log\LoggerInterface')->getMock();
+
+            $that = $this;
+            $logArgCheck = function ($level, $message, $context) use ($that) {
+                $that->assertEquals('Undefined variable: undefVar', $message);
+                $that->assertArrayHasKey('type', $context);
+                $that->assertEquals($context['type'], E_NOTICE);
+            };
+
+            $logger
+                ->expects($this->once())
+                ->method('log')
+                ->will($this->returnCallback($logArgCheck))
+            ;
+
+            $handler = ErrorHandler::register(E_NOTICE);
+            @$handler->setLogger($logger, 'scream');
+            unset($undefVar);
+            @$undefVar++;
+
+            restore_error_handler();
+            restore_exception_handler();
+        } catch (\Exception $e) {
+            restore_error_handler();
+            restore_exception_handler();
+
+            throw $e;
+        }
+    }
+
+    /**
+     * @expectedException \Exception
+     * @group no-hhvm
+     */
+    public function testCustomExceptionHandler()
+    {
+        $handler = new ErrorHandler();
+        $handler->setExceptionHandler(function ($e) use ($handler) {
+            $handler->handleException($e);
+        });
+
+        $handler->handleException(new \Exception());
+    }
 }

Tests/Exception/FlattenExceptionTest.php

@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Debug\Tests\Exception;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Debug\Exception\FlattenException;
 use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 use Symfony\Component\HttpKernel\Exception\MethodNotAllowedHttpException;
@@ -27,7 +28,7 @@ use Symfony\Component\HttpKernel\Exception\ServiceUnavailableHttpException;
 use Symfony\Component\HttpKernel\Exception\TooManyRequestsHttpException;
 use Symfony\Component\HttpKernel\Exception\UnsupportedMediaTypeHttpException;
 
-class FlattenExceptionTest extends \PHPUnit_Framework_TestCase
+class FlattenExceptionTest extends TestCase
 {
     public function testStatusCode()
     {
@@ -104,7 +105,7 @@ class FlattenExceptionTest extends \PHPUnit_Framework_TestCase
     /**
      * @dataProvider flattenDataProvider
      */
-    public function testFlattenHttpException(\Exception $exception, $statusCode)
+    public function testFlattenHttpException(\Exception $exception)
     {
         $flattened = FlattenException::create($exception);
         $flattened2 = FlattenException::create($exception);
@@ -119,7 +120,7 @@ class FlattenExceptionTest extends \PHPUnit_Framework_TestCase
     /**
      * @dataProvider flattenDataProvider
      */
-    public function testPrevious(\Exception $exception, $statusCode)
+    public function testPrevious(\Exception $exception)
     {
         $flattened = FlattenException::create($exception);
         $flattened2 = FlattenException::create($exception);
@@ -166,7 +167,7 @@ class FlattenExceptionTest extends \PHPUnit_Framework_TestCase
     /**
      * @dataProvider flattenDataProvider
      */
-    public function testToArray(\Exception $exception, $statusCode)
+    public function testToArray(\Exception $exception)
     {
         $flattened = FlattenException::create($exception);
         $flattened->setTrace(array(), 'foo.php', 123);
@@ -186,74 +187,13 @@ class FlattenExceptionTest extends \PHPUnit_Framework_TestCase
     public function flattenDataProvider()
     {
         return array(
-            array(new \Exception('test', 123), 500),
+            array(new \Exception('test', 123)),
         );
     }
 
-    public function testArguments()
-    {
-        $dh = opendir(__DIR__);
-        $fh = tmpfile();
-
-        $incomplete = unserialize('O:14:"BogusTestClass":0:{}');
-
-        $exception = $this->createException(array(
-            (object) array('foo' => 1),
-            new NotFoundHttpException(),
-            $incomplete,
-            $dh,
-            $fh,
-            function () {},
-            array(1, 2),
-            array('foo' => 123),
-            null,
-            true,
-            false,
-            0,
-            0.0,
-            '0',
-            '',
-            INF,
-            NAN,
-        ));
-
-        $flattened = FlattenException::create($exception);
-        $trace = $flattened->getTrace();
-        $args = $trace[1]['args'];
-        $array = $args[0][1];
-
-        closedir($dh);
-        fclose($fh);
-
-        $i = 0;
-        $this->assertSame(array('object', 'stdClass'), $array[$i++]);
-        $this->assertSame(array('object', 'Symfony\Component\HttpKernel\Exception\NotFoundHttpException'), $array[$i++]);
-        $this->assertSame(array('incomplete-object', 'BogusTestClass'), $array[$i++]);
-        $this->assertSame(array('resource', defined('HHVM_VERSION') ? 'Directory' : 'stream'), $array[$i++]);
-        $this->assertSame(array('resource', 'stream'), $array[$i++]);
-
-        $args = $array[$i++];
-        $this->assertSame($args[0], 'object');
-        $this->assertTrue('Closure' === $args[1] || is_subclass_of($args[1], '\Closure'), 'Expect object class name to be Closure or a subclass of Closure.');
-
-        $this->assertSame(array('array', array(array('integer', 1), array('integer', 2))), $array[$i++]);
-        $this->assertSame(array('array', array('foo' => array('integer', 123))), $array[$i++]);
-        $this->assertSame(array('null', null), $array[$i++]);
-        $this->assertSame(array('boolean', true), $array[$i++]);
-        $this->assertSame(array('boolean', false), $array[$i++]);
-        $this->assertSame(array('integer', 0), $array[$i++]);
-        $this->assertSame(array('float', 0.0), $array[$i++]);
-        $this->assertSame(array('string', '0'), $array[$i++]);
-        $this->assertSame(array('string', ''), $array[$i++]);
-        $this->assertSame(array('float', INF), $array[$i++]);
-
-        // assertEquals() does not like NAN values.
-        $this->assertEquals($array[$i][0], 'float');
-        $this->assertTrue(is_nan($array[$i++][1]));
-    }
-
     public function testRecursionInArguments()
     {
+        $a = null;
         $a = array('foo', array(2, &$a));
         $exception = $this->createException($a);
 
@@ -278,9 +218,6 @@ class FlattenExceptionTest extends \PHPUnit_Framework_TestCase
 
         $flattened = FlattenException::create($exception);
         $trace = $flattened->getTrace();
-
-        $this->assertSame($trace[1]['args'][0], array('array', array('array', '*SKIPPED over 10000 entries*')));
-
         $serializeTrace = serialize($trace);
 
         $this->assertContains('*SKIPPED over 10000 entries*', $serializeTrace);
@@ -291,4 +228,45 @@ class FlattenExceptionTest extends \PHPUnit_Framework_TestCase
     {
         return new \Exception();
     }
+
+    public function testSetTraceIncompleteClass()
+    {
+        $flattened = FlattenException::create(new \Exception('test', 123));
+        $flattened->setTrace(
+            array(
+                array(
+                    'file' => __FILE__,
+                    'line' => 123,
+                    'function' => 'test',
+                    'args' => array(
+                        unserialize('O:14:"BogusTestClass":0:{}'),
+                    ),
+                ),
+            ),
+            'foo.php', 123
+        );
+
+        $this->assertEquals(array(
+            array(
+                'message' => 'test',
+                'class' => 'Exception',
+                'trace' => array(
+                    array(
+                        'namespace' => '', 'short_class' => '', 'class' => '', 'type' => '', 'function' => '',
+                        'file' => 'foo.php', 'line' => 123,
+                        'args' => array(),
+                    ),
+                    array(
+                        'namespace' => '', 'short_class' => '', 'class' => '', 'type' => '', 'function' => 'test',
+                        'file' => __FILE__, 'line' => 123,
+                        'args' => array(
+                            array(
+                                'incomplete-object', 'BogusTestClass',
+                            ),
+                        ),
+                    ),
+                ),
+            ),
+        ), $flattened->toArray());
+    }
 }

Tests/ExceptionHandlerTest.php

@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Debug\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Debug\ExceptionHandler;
 use Symfony\Component\Debug\Exception\OutOfMemoryException;
 use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
@@ -18,7 +19,7 @@ use Symfony\Component\HttpKernel\Exception\MethodNotAllowedHttpException;
 
 require_once __DIR__.'/HeaderMock.php';
 
-class ExceptionHandlerTest extends \PHPUnit_Framework_TestCase
+class ExceptionHandlerTest extends TestCase
 {
     protected function setUp()
     {
@@ -107,8 +108,9 @@ class ExceptionHandlerTest extends \PHPUnit_Framework_TestCase
 
         $handler->handle($exception);
 
-        $handler->setHandler(function ($e) use ($exception) {
-            $this->assertSame($exception, $e);
+        $that = $this;
+        $handler->setHandler(function ($e) use ($exception, $that) {
+            $that->assertSame($exception, $e);
         });
 
         $handler->handle($exception);
@@ -123,8 +125,9 @@ class ExceptionHandlerTest extends \PHPUnit_Framework_TestCase
             ->expects($this->once())
             ->method('sendPhpResponse');
 
-        $handler->setHandler(function ($e) {
-            $this->fail('OutOfMemoryException should bypass the handler');
+        $that = $this;
+        $handler->setHandler(function ($e) use ($that) {
+            $that->fail('OutOfMemoryException should bypass the handler');
         });
 
         $handler->handle($exception);

Tests/FatalErrorHandler/ClassNotFoundFatalErrorHandlerTest.php

@@ -11,13 +11,15 @@
 
 namespace Symfony\Component\Debug\Tests\FatalErrorHandler;
 
-use Symfony\Component\Debug\Exception\FatalErrorException;
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\ClassLoader\ClassLoader as SymfonyClassLoader;
+use Symfony\Component\ClassLoader\UniversalClassLoader as SymfonyUniversalClassLoader;
+use Symfony\Component\Debug\Exception\FatalErrorException;
 use Symfony\Component\Debug\FatalErrorHandler\ClassNotFoundFatalErrorHandler;
 use Symfony\Component\Debug\DebugClassLoader;
 use Composer\Autoload\ClassLoader as ComposerClassLoader;
 
-class ClassNotFoundFatalErrorHandlerTest extends \PHPUnit_Framework_TestCase
+class ClassNotFoundFatalErrorHandlerTest extends TestCase
 {
     public static function setUpBeforeClass()
     {
@@ -67,6 +69,27 @@ class ClassNotFoundFatalErrorHandlerTest extends \PHPUnit_Framework_TestCase
         $this->assertSame($error['line'], $exception->getLine());
     }
 
+    /**
+     * @group legacy
+     */
+    public function testLegacyHandleClassNotFound()
+    {
+        $prefixes = array('Symfony\Component\Debug\Exception\\' => realpath(__DIR__.'/../../Exception'));
+        $symfonyUniversalClassLoader = new SymfonyUniversalClassLoader();
+        $symfonyUniversalClassLoader->registerPrefixes($prefixes);
+
+        $this->testHandleClassNotFound(
+            array(
+                'type' => 1,
+                'line' => 12,
+                'file' => 'foo.php',
+                'message' => 'Class \'Foo\\Bar\\UndefinedFunctionException\' not found',
+            ),
+            "Attempted to load class \"UndefinedFunctionException\" from namespace \"Foo\Bar\".\nDid you forget a \"use\" statement for \"Symfony\Component\Debug\Exception\UndefinedFunctionException\"?",
+            array($symfonyUniversalClassLoader, 'loadClass')
+        );
+    }
+
     public function provideClassNotFoundData()
     {
         $prefixes = array('Symfony\Component\Debug\Exception\\' => realpath(__DIR__.'/../../Exception'));

Tests/FatalErrorHandler/UndefinedFunctionFatalErrorHandlerTest.php

@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Debug\Tests\FatalErrorHandler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Debug\Exception\FatalErrorException;
 use Symfony\Component\Debug\FatalErrorHandler\UndefinedFunctionFatalErrorHandler;
 
-class UndefinedFunctionFatalErrorHandlerTest extends \PHPUnit_Framework_TestCase
+class UndefinedFunctionFatalErrorHandlerTest extends TestCase
 {
     /**
      * @dataProvider provideUndefinedFunctionData

Tests/FatalErrorHandler/UndefinedMethodFatalErrorHandlerTest.php

@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Debug\Tests\FatalErrorHandler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Debug\Exception\FatalErrorException;
 use Symfony\Component\Debug\FatalErrorHandler\UndefinedMethodFatalErrorHandler;
 
-class UndefinedMethodFatalErrorHandlerTest extends \PHPUnit_Framework_TestCase
+class UndefinedMethodFatalErrorHandlerTest extends TestCase
 {
     /**
      * @dataProvider provideUndefinedMethodData

Tests/Fixtures/DeprecatedClass.php

@@ -4,7 +4,7 @@ namespace Symfony\Component\Debug\Tests\Fixtures;
 
 /**
  * @deprecated but this is a test
- *             deprecation notice.
+ *             deprecation notice
  * @foobar
  */
 class DeprecatedClass

Tests/Fixtures/DeprecatedInterface.php

@@ -4,7 +4,7 @@ namespace Symfony\Component\Debug\Tests\Fixtures;
 
 /**
  * @deprecated but this is a test
- *             deprecation notice.
+ *             deprecation notice
  * @foobar
  */
 interface DeprecatedInterface

Tests/Fixtures/NonDeprecatedInterface.php

@@ -1,7 +0,0 @@
-<?php
-
-namespace Symfony\Component\Debug\Tests\Fixtures;
-
-interface NonDeprecatedInterface extends DeprecatedInterface
-{
-}

Tests/Fixtures/Throwing.php

@@ -0,0 +1,3 @@
+<?php
+
+throw new \Exception('boo');

Tests/Fixtures/ToStringThrower.php

@@ -1,24 +0,0 @@
-<?php
-
-namespace Symfony\Component\Debug\Tests\Fixtures;
-
-class ToStringThrower
-{
-    private $exception;
-
-    public function __construct(\Exception $e)
-    {
-        $this->exception = $e;
-    }
-
-    public function __toString()
-    {
-        try {
-            throw $this->exception;
-        } catch (\Exception $e) {
-            // Using user_error() here is on purpose so we do not forget
-            // that this alias also should work alongside with trigger_error().
-            return user_error($e, E_USER_ERROR);
-        }
-    }
-}

Tests/phpt/decorate_exception_hander.phpt

@@ -0,0 +1,47 @@
+--TEST--
+Test catching fatal errors when handlers are nested
+--FILE--
+<?php
+
+namespace Symfony\Component\Debug;
+
+$vendor = __DIR__;
+while (!file_exists($vendor.'/vendor')) {
+    $vendor = dirname($vendor);
+}
+require $vendor.'/vendor/autoload.php';
+
+set_error_handler('var_dump');
+set_exception_handler('var_dump');
+
+ErrorHandler::register(null, false);
+
+if (true) {
+    class foo extends missing
+    {
+    }
+}
+
+?>
+--EXPECTF--
+Fatal error: Class 'Symfony\Component\Debug\missing' not found in %s on line %d
+object(Symfony\Component\Debug\Exception\ClassNotFoundException)#%d (8) {
+  ["message":protected]=>
+  string(131) "Attempted to load class "missing" from namespace "Symfony\Component\Debug".
+Did you forget a "use" statement for another namespace?"
+  ["string":"Exception":private]=>
+  string(0) ""
+  ["code":protected]=>
+  int(0)
+  ["file":protected]=>
+  string(%d) "%s"
+  ["line":protected]=>
+  int(%d)
+  ["trace":"Exception":private]=>
+  array(0) {
+  }
+  ["previous":"Exception":private]=>
+  NULL
+  ["severity":protected]=>
+  int(1)
+}

Tests/phpt/exception_rethrown.phpt

@@ -0,0 +1,35 @@
+--TEST--
+Test rethrowing in custom exception handler
+--FILE--
+<?php
+
+namespace Symfony\Component\Debug;
+
+$vendor = __DIR__;
+while (!file_exists($vendor.'/vendor')) {
+    $vendor = dirname($vendor);
+}
+require $vendor.'/vendor/autoload.php';
+
+if (true) {
+    class TestLogger extends \Psr\Log\AbstractLogger
+    {
+        public function log($level, $message, array $context = array())
+        {
+            echo $message, "\n";
+        }
+    }
+}
+
+set_exception_handler(function ($e) { echo 123; throw $e; });
+ErrorHandler::register()->setDefaultLogger(new TestLogger());
+ini_set('display_errors', 1);
+
+throw new \Exception('foo');
+?>
+--EXPECTF--
+Uncaught Exception: foo
+123
+Fatal error: Uncaught %s:25
+Stack trace:
+%a

Tests/phpt/fatal_with_nested_handlers.phpt

@@ -0,0 +1,42 @@
+--TEST--
+Test catching fatal errors when handlers are nested
+--FILE--
+<?php
+
+namespace Symfony\Component\Debug;
+
+$vendor = __DIR__;
+while (!file_exists($vendor.'/vendor')) {
+    $vendor = dirname($vendor);
+}
+require $vendor.'/vendor/autoload.php';
+
+Debug::enable();
+ini_set('display_errors', 0);
+
+$eHandler = set_error_handler('var_dump');
+$xHandler = set_exception_handler('var_dump');
+
+var_dump(array(
+    $eHandler[0] === $xHandler[0] ? 'Error and exception handlers do match' : 'Error and exception handlers are different',
+));
+
+$eHandler[0]->setExceptionHandler('print_r');
+
+if (true) {
+    class Broken implements \Serializable
+    {
+    }
+}
+
+?>
+--EXPECTF--
+array(1) {
+  [0]=>
+  string(37) "Error and exception handlers do match"
+}
+object(Symfony\Component\Debug\Exception\FatalErrorException)#%d (8) {
+  ["message":protected]=>
+  string(199) "Error: Class Symfony\Component\Debug\Broken contains 2 abstract methods and must therefore be declared abstract or implement the remaining methods (Serializable::serialize, Serializable::unserialize)"
+%a
+}

composer.json

@@ -16,15 +16,15 @@
         }
     ],
     "require": {
-        "php": ">=5.5.9",
+        "php": ">=5.3.9",
         "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": "~2.8|~3.0",
-        "symfony/http-kernel": "~2.8|~3.0"
+        "symfony/class-loader": "~2.2",
+        "symfony/http-kernel": "~2.3.24|~2.5.9|^2.6.2"
     },
     "autoload": {
         "psr-4": { "Symfony\\Component\\Debug\\": "" },
@@ -35,7 +35,7 @@
     "minimum-stability": "dev",
     "extra": {
         "branch-alias": {
-            "dev-master": "3.2-dev"
+            "dev-master": "2.7-dev"
         }
     }
 }

phpunit.xml.dist

@@ -5,6 +5,8 @@
          backupGlobals="false"
          colors="true"
          bootstrap="vendor/autoload.php"
+         failOnRisky="true"
+         failOnWarning="true"
 >
     <php>
         <ini name="error_reporting" value="-1" />