Revert "Revert "bug #17052 [2.7] Fixed flatten exception recursion with errors (GrahamCampbell)""

This reverts commit e60889ac4d85e6ec1083ab95dc84b2b3c0a95dd6.
Merge branch '2.3' into 2.7
2026-03-25 09:42:20 +01:00 · 2015-12-26 15:05:15 +01:00 · 2015-12-26 15:02:48 +01:00 · 2015-12-26 15:02:40 +01:00 · 2015-12-26 14:37:43 +01:00 · 2015-12-26 13:17:22 +01:00
33 changed files with 1314 additions and 427 deletions
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,14 @@
 CHANGELOG
 =========

+2.7.0
+-----
+
+* added deprecations checking for parent interfaces/classes to DebugClassLoader
+* added ZTS support to symfony_debug extension
+* added symfony_debug_backtrace() to symfony_debug extension
+  to track the backtrace of fatal errors
+
 2.6.0
 -----

--- a/DebugClassLoader.php
+++ b/DebugClassLoader.php
@@ -21,8 +21,6 @@ namespace Symfony\Component\Debug;
 * @author Fabien Potencier <fabien@symfony.com>
 * @author Christophe Coevoet <stof@notk.org>
 * @author Nicolas Grekas <p@tchwork.com>
- *
- * @api
 */
 class DebugClassLoader
 {
@@ -30,20 +28,21 @@ class DebugClassLoader
    private $isFinder;
    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|object $classLoader
-     *
-     * @api
-     * @deprecated since 2.5, passing an object is deprecated and support for it will be removed in 3.0
+     * @param callable|object $classLoader Passing an object is @deprecated since version 2.5 and support for it will be removed in 3.0
     */
    public function __construct($classLoader)
    {
        $this->wasFinder = is_object($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 {
@@ -59,9 +58,7 @@ class DebugClassLoader
    /**
     * Gets the wrapped class loader.
     *
-     * @return callable|object a class loader
-     *
-     * @deprecated since 2.5, returning an object is deprecated and support for it will be removed in 3.0
+     * @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()
    {
@@ -69,7 +66,7 @@ class DebugClassLoader
    }

    /**
-     * Wraps all autoloaders
+     * Wraps all autoloaders.
     */
    public static function enable()
    {
@@ -117,16 +114,18 @@ class DebugClassLoader
    }

    /**
-     * Finds a file by class name
+     * Finds a file by class name.
     *
     * @param string $class A class name to resolve to file
     *
     * @return string|null
     *
-     * @deprecated Deprecated since 2.5, to be removed in 3.0.
+     * @deprecated since version 2.5, to be removed in 3.0.
     */
    public function findFile($class)
    {
+        @trigger_error('The '.__METHOD__.' method is deprecated since version 2.5 and will be removed in 3.0.', E_USER_DEPRECATED);
+
        if ($this->wasFinder) {
            return $this->classLoader[0]->findFile($class);
        }
@@ -148,7 +147,7 @@ class DebugClassLoader
        try {
            if ($this->isFinder) {
                if ($file = $this->classLoader[0]->findFile($class)) {
-                    require $file;
+                    require_once $file;
                }
            } else {
                call_user_func($this->classLoader, $class);
@@ -175,6 +174,39 @@ class DebugClassLoader
            if ($name !== $class && 0 === strcasecmp($name, $class)) {
                throw new \RuntimeException(sprintf('Case mismatch between loaded and declared class names: %s vs %s', $class, $name));
            }
+
+            if (in_array(strtolower($refl->getShortName()), self::$php7Reserved)) {
+                @trigger_error(sprintf('%s uses a reserved class name (%s) that will break on PHP 7 and higher', $name, $refl->getShortName()), E_USER_DEPRECATED);
+            } elseif (preg_match('#\n \* @deprecated (.*?)\r?\n \*(?: @|/$)#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, '_'))) {
+                    $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;
+                    }
+                }
+                $parent = $refl->getParentClass();
+
+                if (!$parent || strncmp($ns, $parent->name, $len)) {
+                    if ($parent && isset(self::$deprecated[$parent->name]) && strncmp($ns, $parent->name, $len)) {
+                        @trigger_error(sprintf('The %s class extends %s that is deprecated %s', $name, $parent->name, self::$deprecated[$parent->name]), E_USER_DEPRECATED);
+                    }
+
+                    foreach ($refl->getInterfaceNames() as $interface) {
+                        if (isset(self::$deprecated[$interface]) && strncmp($ns, $interface, $len) && !($parent && $parent->implementsInterface($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);
+                        }
+                    }
+                }
+            }
        }

        if ($file) {
@@ -185,35 +217,89 @@ class DebugClassLoader

                throw new \RuntimeException(sprintf('The autoloader expected class "%s" to be defined in file "%s". The file was found but the class was not in it, the class name or namespace probably has a typo.', $class, $file));
            }
-            if (self::$caseCheck && preg_match('#([/\\\\][a-zA-Z_\x7F-\xFF][a-zA-Z0-9_\x7F-\xFF]*)+\.(php|hh)$#D', $file, $tail)) {
-                $tail = $tail[0];
-                $real = $refl->getFilename();
+            if (self::$caseCheck) {
+                $real = explode('\\', $class.strrchr($file, '.'));
+                $tail = explode(DIRECTORY_SEPARATOR, str_replace('/', DIRECTORY_SEPARATOR, $file));
+
+                $i = count($tail) - 1;
+                $j = count($real) - 1;
+
+                 while (isset($tail[$i], $real[$j]) && $tail[$i] === $real[$j]) {
+                    --$i;
+                    --$j;
+                }
+
+                array_splice($tail, 0, $i + 1);
+            }
+            if (self::$caseCheck && $tail) {
+                $tail = DIRECTORY_SEPARATOR.implode(DIRECTORY_SEPARATOR, $tail);
+                $tailLen = strlen($tail);
+                $real = $refl->getFileName();

                if (2 === self::$caseCheck) {
                    // realpath() on MacOSX doesn't normalize the case of characters
-                    $cwd = getcwd();
-                    $basename = strrpos($real, '/');
-                    chdir(substr($real, 0, $basename));
-                    $basename = substr($real, $basename + 1);
-                    // glob() patterns are case-sensitive even if the underlying fs is not
-                    if (!in_array($basename, glob($basename.'*', GLOB_NOSORT), true)) {
-                        $real = getcwd().'/';
-                        $h = opendir('.');
-                        while (false !== $f = readdir($h)) {
-                            if (0 === strcasecmp($f, $basename)) {
-                                $real .= $f;
-                                break;
+
+                    $i = 1 + strrpos($real, '/');
+                    $file = substr($real, $i);
+                    $real = substr($real, 0, $i);
+
+                    if (isset(self::$darwinCache[$real])) {
+                        $kDir = $real;
+                    } else {
+                        $kDir = strtolower($real);
+
+                        if (isset(self::$darwinCache[$kDir])) {
+                            $real = self::$darwinCache[$kDir][0];
+                        } else {
+                            $dir = getcwd();
+                            chdir($real);
+                            $real = getcwd().'/';
+                            chdir($dir);
+
+                            $dir = $real;
+                            $k = $kDir;
+                            $i = strlen($dir) - 1;
+                            while (!isset(self::$darwinCache[$k])) {
+                                self::$darwinCache[$k] = array($dir, array());
+                                self::$darwinCache[$dir] = &self::$darwinCache[$k];
+
+                                while ('/' !== $dir[--$i]) {
+                                }
+                                $k = substr($k, 0, ++$i);
+                                $dir = substr($dir, 0, $i--);
                            }
                        }
-                        closedir($h);
                    }
-                    chdir($cwd);
+
+                    $dirFiles = self::$darwinCache[$kDir][1];
+
+                    if (isset($dirFiles[$file])) {
+                        $kFile = $file;
+                    } else {
+                        $kFile = strtolower($file);
+
+                        if (!isset($dirFiles[$kFile])) {
+                            foreach (scandir($real, 2) as $f) {
+                                if ('.' !== $f[0]) {
+                                    $dirFiles[$f] = $f;
+                                    if ($f === $file) {
+                                        $kFile = $k = $file;
+                                    } elseif ($f !== $k = strtolower($f)) {
+                                        $dirFiles[$k] = $f;
+                                    }
+                                }
+                            }
+                            self::$darwinCache[$kDir][1] = $dirFiles;
+                        }
+                    }
+
+                    $real .= $dirFiles[$kFile];
                }

-                if (0 === substr_compare($real, $tail, -strlen($tail), strlen($tail), true)
-                  && 0 !== substr_compare($real, $tail, -strlen($tail), strlen($tail), false)
+                if (0 === substr_compare($real, $tail, -$tailLen, $tailLen, true)
+                  && 0 !== substr_compare($real, $tail, -$tailLen, $tailLen, false)
                ) {
-                    throw new \RuntimeException(sprintf('Case mismatch between class and source file names: %s vs %s', $class, $real));
+                    throw new \RuntimeException(sprintf('Case mismatch between class and real file names: %s vs %s in %s', substr($tail, -$tailLen + 1), substr($real, -$tailLen + 1), substr($real, 0, -$tailLen + 1)));
                }
            }

--- a/ErrorHandler.php
+++ b/ErrorHandler.php
@@ -15,6 +15,7 @@ use Psr\Log\LogLevel;
 use Psr\Log\LoggerInterface;
 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\FatalErrorHandler\UndefinedFunctionFatalErrorHandler;
 use Symfony\Component\Debug\FatalErrorHandler\UndefinedMethodFatalErrorHandler;
@@ -46,7 +47,7 @@ use Symfony\Component\Debug\FatalErrorHandler\FatalErrorHandlerInterface;
 class ErrorHandler
 {
    /**
-     * @deprecated since 2.6, to be removed in 3.0.
+     * @deprecated since version 2.6, to be removed in 3.0.
     */
    const TYPE_DEPRECATION = -100;

@@ -71,19 +72,19 @@ class ErrorHandler
    private $loggers = array(
        E_DEPRECATED => array(null, LogLevel::INFO),
        E_USER_DEPRECATED => array(null, LogLevel::INFO),
-        E_NOTICE => array(null, LogLevel::NOTICE),
-        E_USER_NOTICE => array(null, LogLevel::NOTICE),
-        E_STRICT => array(null, LogLevel::NOTICE),
+        E_NOTICE => array(null, LogLevel::WARNING),
+        E_USER_NOTICE => array(null, LogLevel::WARNING),
+        E_STRICT => array(null, LogLevel::WARNING),
        E_WARNING => array(null, LogLevel::WARNING),
        E_USER_WARNING => array(null, LogLevel::WARNING),
        E_COMPILE_WARNING => array(null, LogLevel::WARNING),
        E_CORE_WARNING => array(null, LogLevel::WARNING),
-        E_USER_ERROR => array(null, LogLevel::ERROR),
-        E_RECOVERABLE_ERROR => array(null, LogLevel::ERROR),
-        E_COMPILE_ERROR => array(null, LogLevel::EMERGENCY),
-        E_PARSE => array(null, LogLevel::EMERGENCY),
-        E_ERROR => array(null, LogLevel::EMERGENCY),
-        E_CORE_ERROR => array(null, LogLevel::EMERGENCY),
+        E_USER_ERROR => array(null, LogLevel::CRITICAL),
+        E_RECOVERABLE_ERROR => array(null, LogLevel::CRITICAL),
+        E_COMPILE_ERROR => array(null, LogLevel::CRITICAL),
+        E_PARSE => array(null, LogLevel::CRITICAL),
+        E_ERROR => array(null, LogLevel::CRITICAL),
+        E_CORE_ERROR => array(null, LogLevel::CRITICAL),
    );

    private $thrownErrors = 0x1FFF; // E_ALL - E_DEPRECATED - E_USER_DEPRECATED
@@ -101,16 +102,16 @@ class ErrorHandler
    private static $stackedErrorLevels = array();

    /**
-     * Same init value as thrownErrors
+     * Same init value as thrownErrors.
     *
-     * @deprecated since 2.6, to be removed in 3.0.
+     * @deprecated since version 2.6, to be removed in 3.0.
     */
    private $displayErrors = 0x1FFF;

    /**
     * Registers the error handler.
     *
-     * @param self|null|int $handler The handler to register, or @deprecated (since 2.6, to be removed in 3.0) bit field of thrown levels
+     * @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
@@ -240,7 +241,7 @@ class ErrorHandler
    }

    /**
-     * Sets the error levels that are to be thrown.
+     * Sets the PHP error levels that throw an exception when a PHP error occurs.
     *
     * @param int  $levels  A bit field of E_* constants for thrown errors
     * @param bool $replace Replace or amend the previous value
@@ -250,20 +251,20 @@ class ErrorHandler
    public function throwAt($levels, $replace = false)
    {
        $prev = $this->thrownErrors;
-        $this->thrownErrors = ($levels | E_RECOVERABLE_ERROR | E_USER_ERROR) & ~E_USER_DEPRECATED & ~E_DEPRECATED;
+        $this->thrownErrors = (E_ALL | E_STRICT) & ($levels | E_RECOVERABLE_ERROR | E_USER_ERROR) & ~E_USER_DEPRECATED & ~E_DEPRECATED;
        if (!$replace) {
            $this->thrownErrors |= $prev;
        }
        $this->reRegister($prev | $this->loggedErrors);

-        // $this->displayErrors is @deprecated since 2.6
+        // $this->displayErrors is @deprecated since version 2.6
        $this->displayErrors = $this->thrownErrors;

        return $prev;
    }

    /**
-     * Sets the error levels that are logged or thrown with their local scope.
+     * Sets the PHP error levels for which local variables are preserved.
     *
     * @param int  $levels  A bit field of E_* constants for scoped errors
     * @param bool $replace Replace or amend the previous value
@@ -282,7 +283,7 @@ class ErrorHandler
    }

    /**
-     * Sets the error levels that are logged with their stack trace.
+     * Sets the PHP error levels for which the stack trace is preserved.
     *
     * @param int  $levels  A bit field of E_* constants for traced errors
     * @param bool $replace Replace or amend the previous value
@@ -349,76 +350,94 @@ class ErrorHandler
     *
     * @internal
     */
-    public function handleError($type, $message, $file, $line, array $context)
+    public function handleError($type, $message, $file, $line, array $context, array $backtrace = null)
    {
-        $level = error_reporting() | E_RECOVERABLE_ERROR | E_USER_ERROR;
+        $level = error_reporting() | 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 || $throw)) {
-            if (PHP_VERSION_ID < 50400 && isset($context['GLOBALS']) && ($this->scopedErrors & $type)) {
-                $e = $context;                  // Whatever the signature of the method,
-                unset($e['GLOBALS'], $context); // $context is always a reference in 5.3
-                $context = $e;
+        if (!$type || (!$log && !$throw)) {
+            return $type && $log;
+        }
+
+        if (PHP_VERSION_ID < 50400 && isset($context['GLOBALS']) && ($this->scopedErrors & $type)) {
+            $e = $context;                  // Whatever the signature of the method,
+            unset($e['GLOBALS'], $context); // $context is always a reference in 5.3
+            $context = $e;
+        }
+
+        if (null !== $backtrace && $type & E_ERROR) {
+            // E_ERROR fatal errors are triggered on HHVM when
+            // hhvm.error_handling.call_user_handler_on_fatals=1
+            // which is the way to get their backtrace.
+            $this->handleFatalError(compact('type', 'message', 'file', 'line', 'backtrace'));
+
+            return true;
+        }
+
+        if ($throw) {
+            if (($this->scopedErrors & $type) && 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 {
+                $throw = new \ErrorException($this->levels[$type].': '.$message, 0, $type, $file, $line);
            }

-            if ($throw) {
-                if (($this->scopedErrors & $type) && 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);
+            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.
+
+                $throw->errorHandlerCanary = new ErrorHandlerCanary();
+            }
+
+            throw $throw;
+        }
+
+        // For duplicated errors, log the trace only once
+        $e = md5("{$type}/{$line}/{$file}\x00{$message}", true);
+        $trace = true;
+
+        if (!($this->tracedErrors & $type) || isset($this->loggedTraces[$e])) {
+            $trace = false;
+        } else {
+            $this->loggedTraces[$e] = 1;
+        }
+
+        $e = compact('type', 'file', 'line', 'level');
+
+        if ($type & $level) {
+            if ($this->scopedErrors & $type) {
+                $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 {
-                    $throw = new \ErrorException($this->levels[$type].': '.$message, 0, $type, $file, $line);
-                }
-
-                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.
-
-                    $throw->errorHandlerCanary = new ErrorHandlerCanary();
-                }
-
-                throw $throw;
-            }
-
-            // For duplicated errors, log the trace only once
-            $e = md5("{$type}/{$line}/{$file}\x00{$message}", true);
-            $trace = true;
-
-            if (!($this->tracedErrors & $type) || isset($this->loggedTraces[$e])) {
-                $trace = false;
-            } else {
-                $this->loggedTraces[$e] = 1;
-            }
-
-            $e = compact('type', 'file', 'line', 'level');
-
-            if ($type & $level) {
-                if ($this->scopedErrors & $type) {
-                    $e['context'] = $context;
-                    if ($trace) {
-                        $e['stack'] = debug_backtrace(true); // Provide object
+                    foreach ($backtrace as &$frame) {
+                        unset($frame['args'], $frame);
                    }
-                } elseif ($trace) {
-                    $e['stack'] = debug_backtrace(PHP_VERSION_ID >= 50306 ? DEBUG_BACKTRACE_IGNORE_ARGS : false);
+                    $e['stack'] = $backtrace;
                }
            }
+        }

-            if ($this->isRecursive) {
-                $log = 0;
-            } elseif (self::$stackedErrorLevels) {
-                self::$stackedErrors[] = array($this->loggers[$type], $message, $e);
-            } else {
-                try {
-                    $this->isRecursive = true;
-                    $this->loggers[$type][0]->log($this->loggers[$type][1], $message, $e);
-                    $this->isRecursive = false;
-                } catch (\Exception $e) {
-                    $this->isRecursive = false;
+        if ($this->isRecursive) {
+            $log = 0;
+        } elseif (self::$stackedErrorLevels) {
+            self::$stackedErrors[] = array($this->loggers[$type][0], ($type & $level) ? $this->loggers[$type][1] : LogLevel::DEBUG, $message, $e);
+        } else {
+            try {
+                $this->isRecursive = true;
+                $this->loggers[$type][0]->log(($type & $level) ? $this->loggers[$type][1] : LogLevel::DEBUG, $message, $e);
+                $this->isRecursive = false;
+            } catch (\Exception $e) {
+                $this->isRecursive = false;

-                    throw $e;
-                }
+                throw $e;
            }
        }

@@ -426,26 +445,39 @@ class ErrorHandler
    }

    /**
-     * Handles an exception by logging then forwarding it to an other handler.
+     * Handles an exception by logging then forwarding it to another handler.
     *
-     * @param \Exception $exception An exception to handle
-     * @param array      $error     An array as returned by error_get_last()
+     * @param \Exception|\Throwable $exception An exception to handle
+     * @param array                 $error     An array as returned by error_get_last()
     *
     * @internal
     */
-    public function handleException(\Exception $exception, array $error = null)
+    public function handleException($exception, array $error = null)
    {
-        $level = error_reporting();
-        if ($this->loggedErrors & E_ERROR & ($level | $this->screamedErrors)) {
+        if (!$exception instanceof \Exception) {
+            $exception = new FatalThrowableError($exception);
+        }
+        $type = $exception instanceof FatalErrorException ? $exception->getSeverity() : E_ERROR;
+
+        if ($this->loggedErrors & $type) {
            $e = array(
-                'type' => E_ERROR,
+                'type' => $type,
                'file' => $exception->getFile(),
                'line' => $exception->getLine(),
-                'level' => $level,
+                'level' => error_reporting(),
                'stack' => $exception->getTrace(),
            );
            if ($exception instanceof FatalErrorException) {
-                $message = 'Fatal '.$exception->getMessage();
+                if ($exception instanceof FatalThrowableError) {
+                    $error = array(
+                        'type' => $type,
+                        'message' => $message = $exception->getMessage(),
+                        'file' => $e['file'],
+                        'line' => $e['line'],
+                    );
+                } else {
+                    $message = 'Fatal '.$exception->getMessage();
+                }
            } elseif ($exception instanceof \ErrorException) {
                $message = 'Uncaught '.$exception->getMessage();
                if ($exception instanceof ContextErrorException) {
@@ -472,6 +504,9 @@ class ErrorHandler
        try {
            call_user_func($this->exceptionHandler, $exception);
        } catch (\Exception $handlerException) {
+        } catch (\Throwable $handlerException) {
+        }
+        if (isset($handlerException)) {
            $this->exceptionHandler = null;
            $this->handleException($handlerException);
        }
@@ -486,41 +521,50 @@ class ErrorHandler
     */
    public static function handleFatalError(array $error = null)
    {
-        self::$reservedMemory = '';
+        if (null === self::$reservedMemory) {
+            return;
+        }
+
+        self::$reservedMemory = null;
+
        $handler = set_error_handler('var_dump', 0);
        $handler = is_array($handler) ? $handler[0] : null;
        restore_error_handler();
-        if ($handler instanceof self) {
-            if (null === $error) {
-                $error = error_get_last();
-            }

-            try {
-                while (self::$stackedErrorLevels) {
-                    static::unstackErrors();
-                }
-            } catch (\Exception $exception) {
-                // Handled below
-            }
+        if (!$handler instanceof self) {
+            return;
+        }

-            if ($error && ($error['type'] & (E_PARSE | E_ERROR | E_CORE_ERROR | E_COMPILE_ERROR))) {
-                // Let's not throw anymore but keep logging
-                $handler->throwAt(0, true);
+        if (null === $error) {
+            $error = error_get_last();
+        }

-                if (0 === strpos($error['message'], 'Allowed memory') || 0 === strpos($error['message'], 'Out of memory')) {
-                    $exception = new OutOfMemoryException($handler->levels[$error['type']].': '.$error['message'], 0, $error['type'], $error['file'], $error['line'], 2, false);
-                } else {
-                    $exception = new FatalErrorException($handler->levels[$error['type']].': '.$error['message'], 0, $error['type'], $error['file'], $error['line'], 2, true);
-                }
-            } elseif (!isset($exception)) {
-                return;
+        try {
+            while (self::$stackedErrorLevels) {
+                static::unstackErrors();
            }
+        } catch (\Exception $exception) {
+            // Handled below
+        }

-            try {
-                $handler->handleException($exception, $error);
-            } catch (FatalErrorException $e) {
-                // Ignore this re-throw
+        if ($error && $error['type'] &= E_PARSE | E_ERROR | E_CORE_ERROR | E_COMPILE_ERROR) {
+            // Let's not throw anymore but keep logging
+            $handler->throwAt(0, true);
+            $trace = isset($error['backtrace']) ? $error['backtrace'] : null;
+
+            if (0 === strpos($error['message'], 'Allowed memory') || 0 === strpos($error['message'], 'Out of memory')) {
+                $exception = new OutOfMemoryException($handler->levels[$error['type']].': '.$error['message'], 0, $error['type'], $error['file'], $error['line'], 2, false, $trace);
+            } 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);
+        } catch (FatalErrorException $e) {
+            // Ignore this re-throw
        }
    }

@@ -541,7 +585,7 @@ class ErrorHandler
    }

    /**
-     * Unstacks stacked errors and forwards to the logger
+     * Unstacks stacked errors and forwards to the logger.
     */
    public static function unstackErrors()
    {
@@ -560,7 +604,7 @@ class ErrorHandler
            self::$stackedErrors = array();

            foreach ($errors as $e) {
-                $e[0][0]->log($e[0][1], $e[1], $e[2]);
+                $e[0]->log($e[1], $e[2], $e[3]);
            }
        }
    }
@@ -586,10 +630,12 @@ class ErrorHandler
     *
     * @param int|null $level The level (null to use the error_reporting() value and 0 to disable)
     *
-     * @deprecated since 2.6, to be removed in 3.0. Use throwAt() instead.
+     * @deprecated since version 2.6, to be removed in 3.0. Use throwAt() instead.
     */
    public function setLevel($level)
    {
+        @trigger_error('The '.__METHOD__.' method is deprecated since version 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);
    }
@@ -599,10 +645,12 @@ class ErrorHandler
     *
     * @param int $displayErrors The display_errors flag value
     *
-     * @deprecated since 2.6, to be removed in 3.0. Use throwAt() instead.
+     * @deprecated since version 2.6, to be removed in 3.0. Use throwAt() instead.
     */
    public function setDisplayErrors($displayErrors)
    {
+        @trigger_error('The '.__METHOD__.' method is deprecated since version 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 {
@@ -618,10 +666,12 @@ class ErrorHandler
     * @param LoggerInterface $logger  A logger interface
     * @param string          $channel The channel associated with the logger (deprecation, emergency or scream)
     *
-     * @deprecated since 2.6, to be removed in 3.0. Use setLoggers() or setDefaultLogger() instead.
+     * @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 version 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', 0);
        $handler = is_array($handler) ? $handler[0] : null;
        restore_error_handler();
@@ -641,26 +691,30 @@ class ErrorHandler
    }

    /**
-     * @deprecated since 2.6, to be removed in 3.0. Use handleError() instead.
+     * @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 version 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 2.6, to be removed in 3.0. Use handleFatalError() instead.
+     * @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 version 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
+ * Private class used to work around https://bugs.php.net/54275.
 *
 * @author Nicolas Grekas <p@tchwork.com>
 *
--- a/Exception/DummyException.php
+++ b/Exception/DummyException.php
@@ -11,6 +11,8 @@

 namespace Symfony\Component\Debug\Exception;

+@trigger_error('The '.__NAMESPACE__.'\DummyException class is deprecated since version 2.5 and will be removed in 3.0.', E_USER_DEPRECATED);
+
 /**
 * @author Fabien Potencier <fabien@symfony.com>
 *
--- a/Exception/FatalErrorException.php
+++ b/Exception/FatalErrorException.php
@@ -35,11 +35,19 @@ use Symfony\Component\HttpKernel\Exception\FatalErrorException as LegacyFatalErr
 */
 class FatalErrorException extends LegacyFatalErrorException
 {
-    public function __construct($message, $code, $severity, $filename, $lineno, $traceOffset = null, $traceArgs = true)
+    public function __construct($message, $code, $severity, $filename, $lineno, $traceOffset = null, $traceArgs = true, array $trace = null)
    {
        parent::__construct($message, $code, $severity, $filename, $lineno);

-        if (null !== $traceOffset) {
+        if (null !== $trace) {
+            if (!$traceArgs) {
+                foreach ($trace as &$frame) {
+                    unset($frame['args'], $frame['this'], $frame);
+                }
+            }
+
+            $this->setTrace($trace);
+        } elseif (null !== $traceOffset) {
            if (function_exists('xdebug_get_function_stack')) {
                $trace = xdebug_get_function_stack();
                if (0 < $traceOffset) {
@@ -48,7 +56,7 @@ class FatalErrorException extends LegacyFatalErrorException

                foreach ($trace as &$frame) {
                    if (!isset($frame['type'])) {
-                        //  XDebug pre 2.1.1 doesn't currently set the call type key http://bugs.xdebug.org/view.php?id=695
+                        // XDebug pre 2.1.1 doesn't currently set the call type key http://bugs.xdebug.org/view.php?id=695
                        if (isset($frame['class'])) {
                            $frame['type'] = '::';
                        }
@@ -69,6 +77,11 @@ class FatalErrorException extends LegacyFatalErrorException

                unset($frame);
                $trace = array_reverse($trace);
+            } elseif (function_exists('symfony_debug_backtrace')) {
+                $trace = symfony_debug_backtrace();
+                if (0 < $traceOffset) {
+                    array_splice($trace, 0, $traceOffset);
+                }
            } else {
                $trace = array();
            }
--- a/Exception/FatalThrowableError.php
+++ b/Exception/FatalThrowableError.php
@@ -0,0 +1,44 @@
+<?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;
+
+/**
+ * Fatal Throwable Error.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class FatalThrowableError extends FatalErrorException
+{
+    public function __construct(\Throwable $e)
+    {
+        if ($e instanceof \ParseError) {
+            $message = 'Parse error: '.$e->getMessage();
+            $severity = E_PARSE;
+        } elseif ($e instanceof \TypeError) {
+            $message = 'Type error: '.$e->getMessage();
+            $severity = E_RECOVERABLE_ERROR;
+        } else {
+            $message = 'Fatal error: '.$e->getMessage();
+            $severity = E_ERROR;
+        }
+
+        \ErrorException::__construct(
+            $message,
+            $e->getCode(),
+            $severity,
+            $e->getFile(),
+            $e->getLine()
+        );
+
+        $this->setTrace($e->getTrace());
+    }
+}
--- a/Exception/FlattenException.php
+++ b/Exception/FlattenException.php
@@ -94,8 +94,13 @@ class FlattenException extends LegacyFlattenException
        $e->setClass(get_class($exception));
        $e->setFile($exception->getFile());
        $e->setLine($exception->getLine());
-        if ($exception->getPrevious()) {
-            $e->setPrevious(static::create($exception->getPrevious()));
+
+        $previous = $exception->getPrevious();
+
+        if ($previous instanceof \Exception) {
+            $e->setPrevious(static::create($previous));
+        } elseif ($previous instanceof \Throwable) {
+            $e->setPrevious(static::create(new FatalThrowableError($previous)));
        }

        return $e;
--- a/ExceptionHandler.php
+++ b/ExceptionHandler.php
@@ -30,27 +30,37 @@ use Symfony\Component\Debug\Exception\OutOfMemoryException;
 class ExceptionHandler
 {
    private $debug;
+    private $charset;
    private $handler;
    private $caughtBuffer;
    private $caughtLength;
    private $fileLinkFormat;

-    public function __construct($debug = true, $fileLinkFormat = null)
+    public function __construct($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');
    }

    /**
     * Registers the exception handler.
     *
-     * @param bool $debug
+     * @param bool        $debug          Enable/disable debug mode, where the stack trace is displayed
+     * @param string|null $charset        The charset used by exception messages
+     * @param string|null $fileLinkFormat The IDE link template
     *
     * @return ExceptionHandler The registered exception handler
     */
-    public static function register($debug = true, $fileLinkFormat = null)
+    public static function register($debug = true, $charset = null, $fileLinkFormat = null)
    {
-        $handler = new static($debug, $fileLinkFormat);
+        $handler = new static($debug, $charset, $fileLinkFormat);

        $prev = set_exception_handler(array($handler, 'handle'));
        if (is_array($prev) && $prev[0] instanceof ErrorHandler) {
@@ -143,19 +153,22 @@ class ExceptionHandler
     * it will fallback to plain PHP functions.
     *
     * @param \Exception $exception An \Exception instance
-     *
-     * @see sendPhpResponse()
-     * @see createResponse()
     */
    private function failSafeHandle(\Exception $exception)
    {
-        if (class_exists('Symfony\Component\HttpFoundation\Response', false)) {
+        if (class_exists('Symfony\Component\HttpFoundation\Response', false)
+            && __CLASS__ !== get_class($this)
+            && ($reflector = new \ReflectionMethod($this, 'createResponse'))
+            && __CLASS__ !== $reflector->class
+        ) {
            $response = $this->createResponse($exception);
            $response->sendHeaders();
            $response->sendContent();
-        } else {
-            $this->sendPhpResponse($exception);
+
+            return;
        }
+
+        $this->sendPhpResponse($exception);
    }

    /**
@@ -177,6 +190,7 @@ class ExceptionHandler
            foreach ($exception->getHeaders() as $name => $value) {
                header($name.': '.$value, false);
            }
+            header('Content-Type: text/html; charset='.$this->charset);
        }

        echo $this->decorate($this->getContent($exception), $this->getStylesheet($exception));
@@ -195,7 +209,7 @@ class ExceptionHandler
            $exception = FlattenException::create($exception);
        }

-        return new Response($this->decorate($this->getContent($exception), $this->getStylesheet($exception)), $exception->getStatusCode(), $exception->getHeaders());
+        return Response::create($this->decorate($this->getContent($exception), $this->getStylesheet($exception)), $exception->getStatusCode(), $exception->getHeaders())->setCharset($this->charset);
    }

    /**
@@ -223,7 +237,7 @@ class ExceptionHandler
                foreach ($exception->toArray() as $position => $e) {
                    $ind = $count - $position + 1;
                    $class = $this->formatClass($e['class']);
-                    $message = nl2br(self::utf8Htmlize($e['message']));
+                    $message = nl2br($this->escapeHtml($e['message']));
                    $content .= sprintf(<<<EOF
                        <h2 class="block_exception clear_fix">
                            <span class="exception_counter">%d/%d</span>
@@ -251,7 +265,7 @@ EOF
            } catch (\Exception $e) {
                // something nasty happened and we cannot throw an exception anymore
                if ($this->debug) {
-                    $title = sprintf('Exception thrown when handling an exception (%s: %s)', get_class($e), $e->getMessage());
+                    $title = sprintf('Exception thrown when handling an exception (%s: %s)', get_class($e), $this->escapeHtml($e->getMessage()));
                } else {
                    $title = 'Whoops, looks like something went wrong.';
                }
@@ -337,7 +351,7 @@ EOF;
 <!DOCTYPE html>
 <html>
    <head>
-        <meta charset="UTF-8" />
+        <meta charset="{$this->charset}" />
        <meta name="robots" content="noindex,nofollow" />
        <style>
            /* Copyright (c) 2010, Yahoo! Inc. All rights reserved. Code licensed under the BSD License: http://developer.yahoo.com/yui/license.html */
@@ -360,16 +374,16 @@ EOF;
    {
        $parts = explode('\\', $class);

-        return sprintf("<abbr title=\"%s\">%s</abbr>", $class, array_pop($parts));
+        return sprintf('<abbr title="%s">%s</abbr>', $class, array_pop($parts));
    }

    private function formatPath($path, $line)
    {
-        $path = self::utf8Htmlize($path);
+        $path = $this->escapeHtml($path);
        $file = preg_match('#[^/\\\\]*$#', $path, $file) ? $file[0] : $path;

        if ($linkFormat = $this->fileLinkFormat) {
-            $link = str_replace(array('%f', '%l'), array($path, $line), $linkFormat);
+            $link = strtr($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);
        }
@@ -389,11 +403,11 @@ EOF;
        $result = array();
        foreach ($args as $key => $item) {
            if ('object' === $item[0]) {
-                $formattedValue = sprintf("<em>object</em>(%s)", $this->formatClass($item[1]));
+                $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]);
+                $formattedValue = sprintf('<em>array</em>(%s)', is_array($item[1]) ? $this->formatArgs($item[1]) : $item[1]);
            } elseif ('string' === $item[0]) {
-                $formattedValue = sprintf("'%s'", self::utf8Htmlize($item[1]));
+                $formattedValue = sprintf("'%s'", $this->escapeHtml($item[1]));
            } elseif ('null' === $item[0]) {
                $formattedValue = '<em>null</em>';
            } elseif ('boolean' === $item[0]) {
@@ -401,7 +415,7 @@ EOF;
            } elseif ('resource' === $item[0]) {
                $formattedValue = '<em>resource</em>';
            } else {
-                $formattedValue = str_replace("\n", '', var_export(self::utf8Htmlize((string) $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);
@@ -411,24 +425,25 @@ EOF;
    }

    /**
-     * Returns an UTF-8 and HTML encoded string
+     * Returns an UTF-8 and HTML encoded string.
+     *
+     * @deprecated since version 2.7, to be removed in 3.0.
     */
    protected static function utf8Htmlize($str)
    {
-        if (!preg_match('//u', $str) && function_exists('iconv')) {
-            set_error_handler('var_dump', 0);
-            $charset = ini_get('default_charset');
-            if ('UTF-8' === $charset || $str !== @iconv($charset, $charset, $str)) {
-                $charset = 'CP1252';
-            }
-            restore_error_handler();
-
-            $str = iconv($charset, 'UTF-8', $str);
-        }
+        @trigger_error('The '.__METHOD__.' method is deprecated since version 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_QUOTES | (PHP_VERSION_ID >= 50400 ? ENT_SUBSTITUTE : 0), $this->charset);
+    }
+
    /**
     * @internal
     */
--- a/FatalErrorHandler/ClassNotFoundFatalErrorHandler.php
+++ b/FatalErrorHandler/ClassNotFoundFatalErrorHandler.php
@@ -77,7 +77,7 @@ class ClassNotFoundFatalErrorHandler implements FatalErrorHandlerInterface
    /**
     * Tries to guess the full namespace for a given class name.
     *
-     * By default, it looks for PSR-0 classes registered via a Symfony or a Composer
+     * By default, it looks for PSR-0 and PSR-4 classes registered via a Symfony or a Composer
     * autoloader (that should cover all common cases).
     *
     * @param string $class A class name (without its namespace)
@@ -101,7 +101,7 @@ class ClassNotFoundFatalErrorHandler implements FatalErrorHandlerInterface
            if ($function[0] instanceof DebugClassLoader) {
                $function = $function[0]->getClassLoader();

-                // Since 2.5, returning an object from DebugClassLoader::getClassLoader() is @deprecated
+                // @deprecated since version 2.5. Returning an object from DebugClassLoader::getClassLoader() is deprecated.
                if (is_object($function)) {
                    $function = array($function);
                }
@@ -118,6 +118,13 @@ class ClassNotFoundFatalErrorHandler implements FatalErrorHandlerInterface
                    }
                }
            }
+            if ($function[0] instanceof ComposerClassLoader) {
+                foreach ($function[0]->getPrefixesPsr4() as $prefix => $paths) {
+                    foreach ($paths as $path) {
+                        $classes = array_merge($classes, $this->findClassInPath($path, $class, $prefix));
+                    }
+                }
+            }
        }

        return array_unique($classes);
@@ -132,13 +139,13 @@ class ClassNotFoundFatalErrorHandler implements FatalErrorHandlerInterface
     */
    private function findClassInPath($path, $class, $prefix)
    {
-        if (!$path = realpath($path)) {
+        if (!$path = realpath($path.'/'.strtr($prefix, '\\_', '//')) ?: realpath($path.'/'.dirname(strtr($prefix, '\\_', '//'))) ?: realpath($path)) {
            return array();
        }

        $classes = array();
        $filename = $class.'.php';
-        foreach (new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($path), \RecursiveIteratorIterator::LEAVES_ONLY) as $file) {
+        foreach (new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($path, \RecursiveDirectoryIterator::SKIP_DOTS), \RecursiveIteratorIterator::LEAVES_ONLY) as $file) {
            if ($filename == $file->getFileName() && $class = $this->convertFileToClass($path, $file->getPathName(), $prefix)) {
                $classes[] = $class;
            }
@@ -160,13 +167,21 @@ class ClassNotFoundFatalErrorHandler implements FatalErrorHandlerInterface
            // namespaced class
            $namespacedClass = str_replace(array($path.DIRECTORY_SEPARATOR, '.php', '/'), array('', '', '\\'), $file),
            // namespaced class (with target dir)
-            $namespacedClassTargetDir = $prefix.str_replace(array($path.DIRECTORY_SEPARATOR, '.php', '/'), array('', '', '\\'), $file),
+            $prefix.$namespacedClass,
+            // namespaced class (with target dir and separator)
+            $prefix.'\\'.$namespacedClass,
            // PEAR class
            str_replace('\\', '_', $namespacedClass),
            // PEAR class (with target dir)
-            str_replace('\\', '_', $namespacedClassTargetDir),
+            str_replace('\\', '_', $prefix.$namespacedClass),
+            // PEAR class (with target dir and separator)
+            str_replace('\\', '_', $prefix.'\\'.$namespacedClass),
        );

+        if ($prefix) {
+            $candidates = array_filter($candidates, function ($candidate) use ($prefix) {return 0 === strpos($candidate, $prefix);});
+        }
+
        // We cannot use the autoloader here as most of them use require; but if the class
        // is not found, the new autoloader call will require the file again leading to a
        // "cannot redeclare class" error.
--- a/FatalErrorHandler/UndefinedMethodFatalErrorHandler.php
+++ b/FatalErrorHandler/UndefinedMethodFatalErrorHandler.php
@@ -34,7 +34,7 @@ class UndefinedMethodFatalErrorHandler implements FatalErrorHandlerInterface
        $className = $matches[1];
        $methodName = $matches[2];

-        $message = sprintf('Attempted to call method "%s" on class "%s".', $methodName, $className);
+        $message = sprintf('Attempted to call an undefined method named "%s" of class "%s".', $methodName, $className);

        $candidates = array();
        foreach (get_class_methods($className) as $definedMethodName) {
--- a/README.md
+++ b/README.md
@@ -15,6 +15,7 @@ Debug::enable();
 You can also use the tools individually:

 ```php
+use Symfony\Component\Debug\DebugClassLoader;
 use Symfony\Component\Debug\ErrorHandler;
 use Symfony\Component\Debug\ExceptionHandler;

@@ -25,11 +26,9 @@ if ('cli' !== php_sapi_name()) {
    ini_set('display_errors', 1);
 }
 ErrorHandler::register();
+DebugClassLoader::enable();
 ```

-Note that the `Debug::enable()` call also registers the debug class loader
-from the Symfony ClassLoader component when available.
-
 This component can optionally take advantage of the features of the HttpKernel
 and HttpFoundation components.

@@ -39,5 +38,5 @@ Resources
 You can run the unit tests with the following command:

    $ cd path/to/Symfony/Component/Debug/
-    $ composer.phar install --dev
+    $ composer install
    $ phpunit
--- a/Resources/ext/README.md
+++ b/Resources/ext/README.md
@@ -0,0 +1,133 @@
+Symfony Debug Extension
+=======================
+
+This extension publishes several functions to help building powerful debugging tools.
+
+symfony_zval_info()
+-------------------
+
+- exposes zval_hash/refcounts, allowing e.g. efficient exploration of arbitrary structures in PHP,
+- does work with references, preventing memory copying.
+
+Its behavior is about the same as:
+
+```php
+<?php
+
+function symfony_zval_info($key, $array, $options = 0)
+{
+
+    // $options is currently not used, but could be in future version.
+
+    if (!array_key_exists($key, $array)) {
+        return null;
+    }
+
+    $info = array(
+        'type' => gettype($array[$key]),
+        'zval_hash' => /* hashed memory address of $array[$key] */,
+        'zval_refcount' => /* internal zval refcount of $array[$key] */,
+        'zval_isref' => /* is_ref status of $array[$key] */,
+    );
+
+    switch ($info['type']) {
+        case 'object':
+            $info += array(
+                'object_class' => get_class($array[$key]),
+                'object_refcount' => /* internal object refcount of $array[$key] */,
+                'object_hash' => spl_object_hash($array[$key]),
+                'object_handle' => /* internal object handle $array[$key] */,
+            );
+            break;
+
+        case 'resource':
+            $info += array(
+                'resource_handle' => (int) $array[$key],
+                'resource_type' => get_resource_type($array[$key]),
+                'resource_refcount' => /* internal resource refcount of $array[$key] */,
+            );
+            break;
+
+        case 'array':
+            $info += array(
+                'array_count' => count($array[$key]),
+            );
+            break;
+
+        case 'string':
+            $info += array(
+                'strlen' => strlen($array[$key]),
+            );
+            break;
+    }
+
+    return $info;
+}
+```
+
+symfony_debug_backtrace()
+-------------------------
+
+This function works like debug_backtrace(), except that it can fetch the full backtrace in case of fatal errors:
+
+```php
+function foo() { fatal(); }
+function bar() { foo(); }
+
+function sd() { var_dump(symfony_debug_backtrace()); }
+
+register_shutdown_function('sd');
+
+bar();
+
+/* Will output
+Fatal error: Call to undefined function fatal() in foo.php on line 42
+array(3) {
+  [0]=>
+  array(2) {
+    ["function"]=>
+    string(2) "sd"
+    ["args"]=>
+    array(0) {
+    }
+  }
+  [1]=>
+  array(4) {
+    ["file"]=>
+    string(7) "foo.php"
+    ["line"]=>
+    int(1)
+    ["function"]=>
+    string(3) "foo"
+    ["args"]=>
+    array(0) {
+    }
+  }
+  [2]=>
+  array(4) {
+    ["file"]=>
+    string(102) "foo.php"
+    ["line"]=>
+    int(2)
+    ["function"]=>
+    string(3) "bar"
+    ["args"]=>
+    array(0) {
+    }
+  }
+}
+*/
+```
+
+Usage
+-----
+
+The extension is compatible with ZTS mode, and should be supported by PHP5.3, 5.4, 5.5 and 5.6.
+To enable the extension from source, run:
+
+```
+    phpize
+    ./configure
+    make
+    sudo make install
+```
--- a/Resources/ext/README.rst
+++ b/Resources/ext/README.rst
@@ -1,72 +0,0 @@
-Symfony Debug Extension
-=======================
-
-This extension adds a ``symfony_zval_info($key, $array, $options = 0)`` function that:
-
- exposes zval_hash/refcounts, allowing e.g. efficient exploration of arbitrary structures in PHP,
- does work with references, preventing memory copying.
-
-Its behavior is about the same as:
-
-.. code-block:: php
-
-    <?php
-
-    function symfony_zval_info($key, $array, $options = 0)
-    {
-        // $options is currently not used, but could be in future version.
-
-        if (!array_key_exists($key, $array)) {
-            return null;
-        }
-
-        $info = array(
-            'type' => gettype($array[$key]),
-            'zval_hash' => /* hashed memory address of $array[$key] */,
-            'zval_refcount' => /* internal zval refcount of $array[$key] */,
-            'zval_isref' => /* is_ref status of $array[$key] */,
-        );
-
-        switch ($info['type']) {
-            case 'object':
-                $info += array(
-                    'object_class' => get_class($array[$key]),
-                    'object_refcount' => /* internal object refcount of $array[$key] */,
-                    'object_hash' => spl_object_hash($array[$key]),
-                    'object_handle' => /* internal object handle $array[$key] */,
-                );
-                break;
-
-            case 'resource':
-                $info += array(
-                    'resource_handle' => (int) $array[$key],
-                    'resource_type' => get_resource_type($array[$key]),
-                    'resource_refcount' => /* internal resource refcount of $array[$key] */,
-                );
-                break;
-
-            case 'array':
-                $info += array(
-                    'array_count' => count($array[$key]),
-                );
-                break;
-
-            case 'string':
-                $info += array(
-                    'strlen' => strlen($array[$key]),
-                );
-                break;
-        }
-
-        return $info;
-    }
-
-To enable the extension from source, run:
-
-.. code-block:: sh
-
-    phpize
-    ./configure
-    make
-    sudo make install
-
--- a/Resources/ext/php_symfony_debug.h
+++ b/Resources/ext/php_symfony_debug.h
@@ -13,7 +13,7 @@
 extern zend_module_entry symfony_debug_module_entry;
 #define phpext_symfony_debug_ptr &symfony_debug_module_entry

-#define PHP_SYMFONY_DEBUG_VERSION "1.0"
+#define PHP_SYMFONY_DEBUG_VERSION "2.7"

 #ifdef PHP_WIN32
 #	define PHP_SYMFONY_DEBUG_API __declspec(dllexport)
@@ -29,6 +29,8 @@ extern zend_module_entry symfony_debug_module_entry;

 ZEND_BEGIN_MODULE_GLOBALS(symfony_debug)
 	intptr_t req_rand_init;
+	void (*old_error_cb)(int type, const char *error_filename, const uint error_lineno, const char *format, va_list args);
+	zval *debug_bt;
 ZEND_END_MODULE_GLOBALS(symfony_debug)

 PHP_MINIT_FUNCTION(symfony_debug);
@@ -40,11 +42,14 @@ PHP_GINIT_FUNCTION(symfony_debug);
 PHP_GSHUTDOWN_FUNCTION(symfony_debug);

 PHP_FUNCTION(symfony_zval_info);
+PHP_FUNCTION(symfony_debug_backtrace);

-static char *_symfony_debug_memory_address_hash(void *);
+static char *_symfony_debug_memory_address_hash(void * TSRMLS_DC);
 static const char *_symfony_debug_zval_type(zval *);
-static const char* _symfony_debug_get_resource_type(long);
-static int _symfony_debug_get_resource_refcount(long);
+static const char* _symfony_debug_get_resource_type(long TSRMLS_DC);
+static int _symfony_debug_get_resource_refcount(long TSRMLS_DC);
+
+void symfony_debug_error_cb(int type, const char *error_filename, const uint error_lineno, const char *format, va_list args);

 #ifdef ZTS
 #define SYMFONY_DEBUG_G(v) TSRMG(symfony_debug_globals_id, zend_symfony_debug_globals *, v)
--- a/Resources/ext/symfony_debug.c
+++ b/Resources/ext/symfony_debug.c
@@ -12,6 +12,9 @@
 #endif

 #include "php.h"
+#ifdef ZTS
+#include "TSRM.h"
+#endif
 #include "php_ini.h"
 #include "ext/standard/info.h"
 #include "php_symfony_debug.h"
@@ -19,6 +22,13 @@
 #include "ext/standard/php_lcg.h"
 #include "ext/spl/php_spl.h"
 #include "Zend/zend_gc.h"
+#include "Zend/zend_builtin_functions.h"
+#include "Zend/zend_extensions.h" /* for ZEND_EXTENSION_API_NO */
+#include "ext/standard/php_array.h"
+#include "Zend/zend_interfaces.h"
+#include "SAPI.h"
+
+#define IS_PHP_53 ZEND_EXTENSION_API_NO == 220090626

 ZEND_DECLARE_MODULE_GLOBALS(symfony_debug)

@@ -30,9 +40,28 @@ ZEND_END_ARG_INFO()

 const zend_function_entry symfony_debug_functions[] = {
 	PHP_FE(symfony_zval_info,	symfony_zval_arginfo)
+	PHP_FE(symfony_debug_backtrace, NULL)
 	PHP_FE_END
 };

+PHP_FUNCTION(symfony_debug_backtrace)
+{
+	if (zend_parse_parameters_none() == FAILURE) {
+		return;
+	}
+#if IS_PHP_53
+	zend_fetch_debug_backtrace(return_value, 1, 0 TSRMLS_CC);
+#else
+	zend_fetch_debug_backtrace(return_value, 1, 0, 0 TSRMLS_CC);
+#endif
+
+	if (!SYMFONY_DEBUG_G(debug_bt)) {
+		return;
+	}
+
+	php_array_merge(Z_ARRVAL_P(return_value), Z_ARRVAL_P(SYMFONY_DEBUG_G(debug_bt)), 0 TSRMLS_CC);
+}
+
 PHP_FUNCTION(symfony_zval_info)
 {
 	zval *key = NULL, *arg = NULL;
@@ -40,7 +69,7 @@ PHP_FUNCTION(symfony_zval_info)
 	HashTable *array = NULL;
 	long options = 0;

-	if (zend_parse_parameters(ZEND_NUM_ARGS(), "zh|l", &key, &array, &options) == FAILURE) {
+	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "zh|l", &key, &array, &options) == FAILURE) {
 		return;
 	}

@@ -62,13 +91,14 @@ PHP_FUNCTION(symfony_zval_info)
 	array_init(return_value);

 	add_assoc_string(return_value, "type", (char *)_symfony_debug_zval_type(arg), 1);
-	add_assoc_stringl(return_value, "zval_hash", _symfony_debug_memory_address_hash((void *)arg), 16, 1);
+	add_assoc_stringl(return_value, "zval_hash", _symfony_debug_memory_address_hash((void *)arg TSRMLS_CC), 16, 0);
 	add_assoc_long(return_value, "zval_refcount", Z_REFCOUNT_P(arg));
 	add_assoc_bool(return_value, "zval_isref", (zend_bool)Z_ISREF_P(arg));

 	if (Z_TYPE_P(arg) == IS_OBJECT) {
-		static char hash[33] = {0};
-		php_spl_object_hash(arg, (char *)hash);
+		char hash[33] = {0};
+
+		php_spl_object_hash(arg, (char *)hash TSRMLS_CC);
 		add_assoc_stringl(return_value, "object_class", (char *)Z_OBJCE_P(arg)->name, Z_OBJCE_P(arg)->name_length, 1);
 		add_assoc_long(return_value, "object_refcount", EG(objects_store).object_buckets[Z_OBJ_HANDLE_P(arg)].bucket.obj.refcount);
 		add_assoc_string(return_value, "object_hash", hash, 1);
@@ -77,17 +107,41 @@ PHP_FUNCTION(symfony_zval_info)
 		add_assoc_long(return_value, "array_count", zend_hash_num_elements(Z_ARRVAL_P(arg)));
 	} else if(Z_TYPE_P(arg) == IS_RESOURCE) {
 		add_assoc_long(return_value, "resource_handle", Z_LVAL_P(arg));
-		add_assoc_string(return_value, "resource_type", (char *)_symfony_debug_get_resource_type(Z_LVAL_P(arg)), 1);
-		add_assoc_long(return_value, "resource_refcount", _symfony_debug_get_resource_refcount(Z_LVAL_P(arg)));
+		add_assoc_string(return_value, "resource_type", (char *)_symfony_debug_get_resource_type(Z_LVAL_P(arg) TSRMLS_CC), 1);
+		add_assoc_long(return_value, "resource_refcount", _symfony_debug_get_resource_refcount(Z_LVAL_P(arg) TSRMLS_CC));
 	} else if (Z_TYPE_P(arg) == IS_STRING) {
 		add_assoc_long(return_value, "strlen", Z_STRLEN_P(arg));
 	}
 }

-static const char* _symfony_debug_get_resource_type(long rsid)
+void symfony_debug_error_cb(int type, const char *error_filename, const uint error_lineno, const char *format, va_list args)
+{
+	TSRMLS_FETCH();
+	zval *retval;
+
+	switch (type) {
+		case E_ERROR:
+		case E_PARSE:
+		case E_CORE_ERROR:
+		case E_CORE_WARNING:
+		case E_COMPILE_ERROR:
+		case E_COMPILE_WARNING:
+			ALLOC_INIT_ZVAL(retval);
+#if IS_PHP_53
+			zend_fetch_debug_backtrace(retval, 1, 0 TSRMLS_CC);
+#else
+			zend_fetch_debug_backtrace(retval, 1, 0, 0 TSRMLS_CC);
+#endif
+			SYMFONY_DEBUG_G(debug_bt) = retval;
+	}
+
+	SYMFONY_DEBUG_G(old_error_cb)(type, error_filename, error_lineno, format, args);
+}
+
+static const char* _symfony_debug_get_resource_type(long rsid TSRMLS_DC)
 {
 	const char *res_type;
-	res_type = zend_rsrc_list_get_rsrc_type(rsid);
+	res_type = zend_rsrc_list_get_rsrc_type(rsid TSRMLS_CC);

 	if (!res_type) {
 		return "Unknown";
@@ -96,7 +150,7 @@ static const char* _symfony_debug_get_resource_type(long rsid)
 	return res_type;
 }

-static int _symfony_debug_get_resource_refcount(long rsid)
+static int _symfony_debug_get_resource_refcount(long rsid TSRMLS_DC)
 {
 	zend_rsrc_list_entry *le;

@@ -107,21 +161,21 @@ static int _symfony_debug_get_resource_refcount(long rsid)
 	return 0;
 }

-static char *_symfony_debug_memory_address_hash(void *address)
+static char *_symfony_debug_memory_address_hash(void *address TSRMLS_DC)
 {
-	static char result[17] = {0};
+	char *result = NULL;
 	intptr_t address_rand;

 	if (!SYMFONY_DEBUG_G(req_rand_init)) {
 		if (!BG(mt_rand_is_seeded)) {
 			php_mt_srand(GENERATE_SEED() TSRMLS_CC);
 		}
-		SYMFONY_DEBUG_G(req_rand_init) = (intptr_t)php_mt_rand();
+		SYMFONY_DEBUG_G(req_rand_init) = (intptr_t)php_mt_rand(TSRMLS_C);
 	}

 	address_rand = (intptr_t)address ^ SYMFONY_DEBUG_G(req_rand_init);

-	snprintf(result, 17, "%016zx", address_rand);
+	spprintf(&result, 17, "%016zx", address_rand);

 	return result;
 }
@@ -187,7 +241,7 @@ ZEND_GET_MODULE(symfony_debug)

 PHP_GINIT_FUNCTION(symfony_debug)
 {
-	symfony_debug_globals->req_rand_init = 0;
+	memset(symfony_debug_globals, 0 , sizeof(*symfony_debug_globals));
 }

 PHP_GSHUTDOWN_FUNCTION(symfony_debug)
@@ -197,11 +251,16 @@ PHP_GSHUTDOWN_FUNCTION(symfony_debug)

 PHP_MINIT_FUNCTION(symfony_debug)
 {
+	SYMFONY_DEBUG_G(old_error_cb) = zend_error_cb;
+	zend_error_cb                 = symfony_debug_error_cb;
+
 	return SUCCESS;
 }

 PHP_MSHUTDOWN_FUNCTION(symfony_debug)
 {
+	zend_error_cb = SYMFONY_DEBUG_G(old_error_cb);
+
 	return SUCCESS;
 }

--- a/Resources/ext/tests/001.phpt
+++ b/Resources/ext/tests/001.phpt
@@ -3,7 +3,7 @@ Test symfony_zval_info API
 --SKIPIF--
 <?php if (!extension_loaded("symfony_debug")) print "skip"; ?>
 --FILE--
-<?php 
+<?php

 $int = 42;
 $float = 42.42;
@@ -88,7 +88,7 @@ array(8) {
  ["object_hash"]=>
  string(32) "%s"
  ["object_handle"]=>
-  int(1)
+  int(%d)
 }
 array(5) {
  ["type"]=>
@@ -112,7 +112,7 @@ array(7) {
  ["zval_isref"]=>
  bool(false)
  ["resource_handle"]=>
-  int(4)
+  int(%d)
  ["resource_type"]=>
  string(6) "stream"
  ["resource_refcount"]=>
--- a/Resources/ext/tests/002.phpt
+++ b/Resources/ext/tests/002.phpt
@@ -0,0 +1,64 @@
+--TEST--
+Test symfony_debug_backtrace in case of fatal error
+--SKIPIF--
+<?php if (!extension_loaded("symfony_debug")) print "skip"; ?>
+--FILE--
+<?php
+
+function bar()
+{
+    foo();
+}
+
+function foo()
+{
+    notexist();
+}
+
+function bt()
+{
+    print_r(symfony_debug_backtrace());
+
+}
+
+register_shutdown_function('bt');
+
+bar();
+
+?>
+--EXPECTF--
+Fatal error: Call to undefined function notexist() in %s on line %d
+Array
+(
+    [0] => Array
+        (
+            [function] => bt
+            [args] => Array
+                (
+                )
+
+        )
+
+    [1] => Array
+        (
+            [file] => %s
+            [line] => %d
+            [function] => foo
+            [args] => Array
+                (
+                )
+
+        )
+
+    [2] => Array
+        (
+            [file] => %s
+            [line] => %d
+            [function] => bar
+            [args] => Array
+                (
+                )
+
+        )
+
+)
--- a/Resources/ext/tests/002_1.phpt
+++ b/Resources/ext/tests/002_1.phpt
@@ -0,0 +1,47 @@
+--TEST--
+Test symfony_debug_backtrace in case of non fatal error
+--SKIPIF--
+<?php if (!extension_loaded("symfony_debug")) print "skip"; ?>
+--FILE--
+<?php
+
+function bar()
+{
+    bt();
+}
+
+function bt()
+{
+    print_r(symfony_debug_backtrace());
+
+}
+
+bar();
+
+?>
+--EXPECTF--
+Array
+(
+    [0] => Array
+        (
+            [file] => %s
+            [line] => %d
+            [function] => bt
+            [args] => Array
+                (
+                )
+
+        )
+
+    [1] => Array
+        (
+            [file] => %s
+            [line] => %d
+            [function] => bar
+            [args] => Array
+                (
+                )
+
+        )
+
+)
--- a/Resources/ext/tests/003.phpt
+++ b/Resources/ext/tests/003.phpt
@@ -0,0 +1,85 @@
+--TEST--
+Test ErrorHandler in case of fatal error
+--SKIPIF--
+<?php if (!extension_loaded("symfony_debug")) print "skip"; ?>
+--FILE--
+<?php
+
+namespace Psr\Log;
+
+class LogLevel
+{
+    const EMERGENCY = 'emergency';
+    const ALERT = 'alert';
+    const CRITICAL = 'critical';
+    const ERROR = 'error';
+    const WARNING = 'warning';
+    const NOTICE = 'notice';
+    const INFO = 'info';
+    const DEBUG = 'debug';
+}
+
+namespace Symfony\Component\Debug;
+
+$dir = __DIR__.'/../../../';
+require $dir.'ErrorHandler.php';
+require $dir.'Exception/FatalErrorException.php';
+require $dir.'Exception/UndefinedFunctionException.php';
+require $dir.'FatalErrorHandler/FatalErrorHandlerInterface.php';
+require $dir.'FatalErrorHandler/ClassNotFoundFatalErrorHandler.php';
+require $dir.'FatalErrorHandler/UndefinedFunctionFatalErrorHandler.php';
+require $dir.'FatalErrorHandler/UndefinedMethodFatalErrorHandler.php';
+
+function bar()
+{
+    foo();
+}
+
+function foo()
+{
+    notexist();
+}
+
+$handler = ErrorHandler::register();
+$handler->setExceptionHandler('print_r');
+
+if (function_exists('xdebug_disable')) {
+    xdebug_disable();
+}
+
+bar();
+?>
+--EXPECTF--
+Fatal error: Call to undefined function Symfony\Component\Debug\notexist() in %s on line %d
+Symfony\Component\Debug\Exception\UndefinedFunctionException Object
+(
+    [message:protected] => Attempted to call function "notexist" from namespace "Symfony\Component\Debug".
+    [string:Exception:private] => 
+    [code:protected] => 0
+    [file:protected] => %s
+    [line:protected] => %d
+    [trace:Exception:private] => Array
+        (
+            [0] => Array
+                (
+%A                    [function] => Symfony\Component\Debug\foo
+%A                    [args] => Array
+                        (
+                        )
+
+                )
+
+            [1] => Array
+                (
+%A                    [function] => Symfony\Component\Debug\bar
+%A                    [args] => Array
+                        (
+                        )
+
+                )
+%A
+        )
+
+    [previous:Exception:private] => 
+    [severity:protected] => 1
+)
--- a/Tests/DebugClassLoaderTest.php
+++ b/Tests/DebugClassLoaderTest.php
@@ -61,6 +61,13 @@ class DebugClassLoaderTest extends \PHPUnit_Framework_TestCase

    public function testUnsilencing()
    {
+        if (PHP_VERSION_ID >= 70000) {
+            $this->markTestSkipped('PHP7 throws exceptions, unsilencing is not required anymore.');
+        }
+        if (defined('HHVM_VERSION')) {
+            $this->markTestSkipped('HHVM is not handled in this test case.');
+        }
+
        ob_start();

        $this->iniSet('log_errors', 0);
@@ -82,6 +89,9 @@ class DebugClassLoaderTest extends \PHPUnit_Framework_TestCase
        if (class_exists('Symfony\Component\Debug\Exception\ContextErrorException', false)) {
            $this->markTestSkipped('The ContextErrorException class is already loaded.');
        }
+        if (defined('HHVM_VERSION')) {
+            $this->markTestSkipped('HHVM is not handled in this test case.');
+        }

        ErrorHandler::register();

@@ -100,9 +110,14 @@ class DebugClassLoaderTest extends \PHPUnit_Framework_TestCase
            // if an exception is thrown, the test passed
            restore_error_handler();
            restore_exception_handler();
-            $this->assertEquals(E_STRICT, $exception->getSeverity());
            $this->assertStringStartsWith(__FILE__, $exception->getFile());
-            $this->assertRegexp('/^Runtime Notice: Declaration/', $exception->getMessage());
+            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());
+            }
        } catch (\Exception $exception) {
            restore_error_handler();
            restore_exception_handler();
@@ -121,6 +136,7 @@ class DebugClassLoaderTest extends \PHPUnit_Framework_TestCase

    /**
     * @expectedException \RuntimeException
+     * @expectedExceptionMessage Case mismatch between class and real file names
     */
    public function testFileCaseMismatch()
    {
@@ -153,6 +169,87 @@ class DebugClassLoaderTest extends \PHPUnit_Framework_TestCase
    {
        $this->assertTrue(class_exists(__NAMESPACE__.'\Fixtures\ClassAlias', true));
    }
+
+    /**
+     * @dataProvider provideDeprecatedSuper
+     */
+    public function testDeprecatedSuper($class, $super, $type)
+    {
+        set_error_handler('var_dump', 0);
+        $e = error_reporting(0);
+        trigger_error('', E_USER_DEPRECATED);
+
+        class_exists('Test\\'.__NAMESPACE__.'\\'.$class, true);
+
+        error_reporting($e);
+        restore_error_handler();
+
+        $lastError = error_get_last();
+        unset($lastError['file'], $lastError['line']);
+
+        $xError = array(
+            'type' => E_USER_DEPRECATED,
+            'message' => 'The Test\Symfony\Component\Debug\Tests\\'.$class.' class '.$type.' Symfony\Component\Debug\Tests\Fixtures\\'.$super.' that is deprecated but this is a test deprecation notice.',
+        );
+
+        $this->assertSame($xError, $lastError);
+    }
+
+    public function provideDeprecatedSuper()
+    {
+        return array(
+            array('DeprecatedInterfaceClass', 'DeprecatedInterface', 'implements'),
+            array('DeprecatedParentClass', 'DeprecatedClass', 'extends'),
+        );
+    }
+
+    public function testDeprecatedSuperInSameNamespace()
+    {
+        set_error_handler('var_dump', 0);
+        $e = error_reporting(0);
+        trigger_error('', E_USER_NOTICE);
+
+        class_exists('Symfony\Bridge\Debug\Tests\Fixtures\ExtendsDeprecatedParent', true);
+
+        error_reporting($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 testReservedForPhp7()
+    {
+        if (PHP_VERSION_ID >= 70000) {
+            $this->markTestSkipped('PHP7 already prevents using reserved names.');
+        }
+
+        set_error_handler('var_dump', 0);
+        $e = error_reporting(0);
+        trigger_error('', E_USER_NOTICE);
+
+        class_exists('Test\\'.__NAMESPACE__.'\\Float', true);
+
+        error_reporting($e);
+        restore_error_handler();
+
+        $lastError = error_get_last();
+        unset($lastError['file'], $lastError['line']);
+
+        $xError = array(
+            'type' => E_USER_DEPRECATED,
+            'message' => 'Test\Symfony\Component\Debug\Tests\Float uses a reserved class name (Float) that will break on PHP 7 and higher',
+        );
+
+        $this->assertSame($xError, $lastError);
+    }
 }

 class ClassLoader
@@ -168,6 +265,8 @@ class ClassLoader

    public function findFile($class)
    {
+        $fixtureDir = __DIR__.DIRECTORY_SEPARATOR.'Fixtures'.DIRECTORY_SEPARATOR;
+
        if (__NAMESPACE__.'\TestingUnsilencing' === $class) {
            eval('-- parse error --');
        } elseif (__NAMESPACE__.'\TestingStacking' === $class) {
@@ -175,13 +274,23 @@ class ClassLoader
        } elseif (__NAMESPACE__.'\TestingCaseMismatch' === $class) {
            eval('namespace '.__NAMESPACE__.'; class TestingCaseMisMatch {}');
        } elseif (__NAMESPACE__.'\Fixtures\CaseMismatch' === $class) {
-            return __DIR__.'/Fixtures/CaseMismatch.php';
+            return $fixtureDir.'CaseMismatch.php';
        } elseif (__NAMESPACE__.'\Fixtures\Psr4CaseMismatch' === $class) {
-            return __DIR__.'/Fixtures/psr4/Psr4CaseMismatch.php';
+            return $fixtureDir.'psr4'.DIRECTORY_SEPARATOR.'Psr4CaseMismatch.php';
        } elseif (__NAMESPACE__.'\Fixtures\NotPSR0' === $class) {
-            return __DIR__.'/Fixtures/reallyNotPsr0.php';
+            return $fixtureDir.'reallyNotPsr0.php';
        } elseif (__NAMESPACE__.'\Fixtures\NotPSR0bis' === $class) {
-            return __DIR__.'/Fixtures/notPsr0Bis.php';
+            return $fixtureDir.'notPsr0Bis.php';
+        } elseif (__NAMESPACE__.'\Fixtures\DeprecatedInterface' === $class) {
+            return $fixtureDir.'DeprecatedInterface.php';
+        } elseif ('Symfony\Bridge\Debug\Tests\Fixtures\ExtendsDeprecatedParent' === $class) {
+            eval('namespace Symfony\Bridge\Debug\Tests\Fixtures; class ExtendsDeprecatedParent extends \\'.__NAMESPACE__.'\Fixtures\DeprecatedClass {}');
+        } elseif ('Test\\'.__NAMESPACE__.'\DeprecatedParentClass' === $class) {
+            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__.'\Float' === $class) {
+            eval('namespace Test\\'.__NAMESPACE__.'; class Float {}');
        }
    }
 }
--- a/Tests/ErrorHandlerTest.php
+++ b/Tests/ErrorHandlerTest.php
@@ -77,7 +77,7 @@ class ErrorHandlerTest extends \PHPUnit_Framework_TestCase

            $this->assertEquals(E_NOTICE, $exception->getSeverity());
            $this->assertEquals(__FILE__, $exception->getFile());
-            $this->assertRegexp('/^Notice: Undefined variable: (foo|bar)/', $exception->getMessage());
+            $this->assertRegExp('/^Notice: Undefined variable: (foo|bar)/', $exception->getMessage());
            $this->assertArrayHasKey('foobar', $exception->getContext());

            $trace = $exception->getTrace();
@@ -141,19 +141,19 @@ class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
            $loggers = array(
                E_DEPRECATED => array(null, LogLevel::INFO),
                E_USER_DEPRECATED => array(null, LogLevel::INFO),
-                E_NOTICE => array($logger, LogLevel::NOTICE),
+                E_NOTICE => array($logger, LogLevel::WARNING),
                E_USER_NOTICE => array($logger, LogLevel::CRITICAL),
-                E_STRICT => array(null, LogLevel::NOTICE),
+                E_STRICT => array(null, LogLevel::WARNING),
                E_WARNING => array(null, LogLevel::WARNING),
                E_USER_WARNING => array(null, LogLevel::WARNING),
                E_COMPILE_WARNING => array(null, LogLevel::WARNING),
                E_CORE_WARNING => array(null, LogLevel::WARNING),
-                E_USER_ERROR => array(null, LogLevel::ERROR),
-                E_RECOVERABLE_ERROR => array(null, LogLevel::ERROR),
-                E_COMPILE_ERROR => array(null, LogLevel::EMERGENCY),
-                E_PARSE => array(null, LogLevel::EMERGENCY),
-                E_ERROR => array(null, LogLevel::EMERGENCY),
-                E_CORE_ERROR => array(null, LogLevel::EMERGENCY),
+                E_USER_ERROR => array(null, LogLevel::CRITICAL),
+                E_RECOVERABLE_ERROR => array(null, LogLevel::CRITICAL),
+                E_COMPILE_ERROR => array(null, LogLevel::CRITICAL),
+                E_PARSE => array(null, LogLevel::CRITICAL),
+                E_ERROR => array(null, LogLevel::CRITICAL),
+                E_CORE_ERROR => array(null, LogLevel::CRITICAL),
            );
            $this->assertSame($loggers, $handler->setLoggers(array()));

@@ -169,8 +169,6 @@ class ErrorHandlerTest extends \PHPUnit_Framework_TestCase

    public function testHandleError()
    {
-        $this->iniSet('error_reporting', -1);
-
        try {
            $handler = ErrorHandler::register();
            $handler->throwAt(0, true);
@@ -270,6 +268,28 @@ class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
        }
    }

+    public function testHandleDeprecation()
+    {
+        $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->getMock('Psr\Log\LoggerInterface');
+        $logger
+            ->expects($this->once())
+            ->method('log')
+            ->will($this->returnCallback($logArgCheck))
+        ;
+
+        $handler = new ErrorHandler();
+        $handler->setDefaultLogger($logger);
+        @$handler->handleError(E_USER_DEPRECATED, 'Foo deprecation', __FILE__, __LINE__, array());
+    }
+
    public function testHandleException()
    {
        try {
@@ -318,6 +338,40 @@ class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
        }
    }

+    public function testErrorStacking()
+    {
+        try {
+            $handler = ErrorHandler::register();
+            $handler->screamAt(E_USER_WARNING);
+
+            $logger = $this->getMock('Psr\Log\LoggerInterface');
+
+            $logger
+                ->expects($this->exactly(2))
+                ->method('log')
+                ->withConsecutive(
+                    array($this->equalTo(LogLevel::WARNING), $this->equalTo('Dummy log')),
+                    array($this->equalTo(LogLevel::DEBUG), $this->equalTo('Silenced warning'))
+                )
+            ;
+
+            $handler->setDefaultLogger($logger, array(E_USER_WARNING => LogLevel::WARNING));
+
+            ErrorHandler::stackErrors();
+            @trigger_error('Silenced warning', E_USER_WARNING);
+            $logger->log(LogLevel::WARNING, 'Dummy log');
+            ErrorHandler::unstackErrors();
+
+            restore_error_handler();
+            restore_exception_handler();
+        } catch (\Exception $e) {
+            restore_error_handler();
+            restore_exception_handler();
+
+            throw $e;
+        }
+    }
+
    public function testHandleFatalError()
    {
        try {
@@ -336,7 +390,7 @@ class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
            $logArgCheck = function ($level, $message, $context) use ($that) {
                $that->assertEquals('Fatal Parse Error: foo', $message);
                $that->assertArrayHasKey('type', $context);
-                $that->assertEquals($context['type'], E_ERROR);
+                $that->assertEquals($context['type'], E_PARSE);
            };

            $logger
@@ -345,7 +399,7 @@ class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
                ->will($this->returnCallback($logArgCheck))
            ;

-            $handler->setDefaultLogger($logger, E_ERROR);
+            $handler->setDefaultLogger($logger, E_PARSE);

            $handler->handleFatalError($error);

@@ -359,10 +413,57 @@ class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
        }
    }

+    public function testHandleFatalErrorOnHHVM()
+    {
+        try {
+            $handler = ErrorHandler::register();
+
+            $logger = $this->getMock('Psr\Log\LoggerInterface');
+            $logger
+                ->expects($this->once())
+                ->method('log')
+                ->with(
+                    $this->equalTo(LogLevel::CRITICAL),
+                    $this->equalTo('Fatal Error: foo'),
+                    $this->equalTo(array(
+                        'type' => 1,
+                        'file' => 'bar',
+                        'line' => 123,
+                        'level' => -1,
+                        'stack' => array(456),
+                    ))
+                )
+            ;
+
+            $handler->setDefaultLogger($logger, E_ERROR);
+
+            $error = array(
+                'type' => E_ERROR + 0x1000000, // This error level is used by HHVM for fatal errors
+                'message' => 'foo',
+                'file' => 'bar',
+                'line' => 123,
+                'context' => array(123),
+                'backtrace' => array(456),
+            );
+
+            call_user_func_array(array($handler, 'handleError'), $error);
+            $handler->handleFatalError($error);
+
+            restore_error_handler();
+            restore_exception_handler();
+        } catch (\Exception $e) {
+            restore_error_handler();
+            restore_exception_handler();
+
+            throw $e;
+        }
+    }
+
+    /**
+     * @group legacy
+     */
    public function testLegacyInterface()
    {
-        $this->iniSet('error_reporting', -1 & ~E_USER_DEPRECATED);
-
        try {
            $handler = ErrorHandler::register(0);
            $this->assertFalse($handler->handle(0, 'foo', 'foo.php', 12, array()));
@@ -386,7 +487,7 @@ class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
            ;

            $handler = ErrorHandler::register(E_NOTICE);
-            $handler->setLogger($logger, 'scream');
+            @$handler->setLogger($logger, 'scream');
            unset($undefVar);
            @$undefVar++;

--- a/Tests/Exception/FlattenExceptionTest.php
+++ b/Tests/Exception/FlattenExceptionTest.php
@@ -131,6 +131,20 @@ class FlattenExceptionTest extends \PHPUnit_Framework_TestCase
        $this->assertSame(array($flattened2), $flattened->getAllPrevious());
    }

+    /**
+     * @requires PHP 7.0
+     */
+    public function testPreviousError()
+    {
+        $exception = new \Exception('test', 123, new \ParseError('Oh noes!', 42));
+
+        $flattened = FlattenException::create($exception)->getPrevious();
+
+        $this->assertEquals($flattened->getMessage(), 'Parse error: Oh noes!', 'The message is copied from the original exception.');
+        $this->assertEquals($flattened->getCode(), 42, 'The code is copied from the original exception.');
+        $this->assertEquals($flattened->getClass(), 'Symfony\Component\Debug\Exception\FatalThrowableError', 'The class is set to the class of the original exception');
+    }
+
    /**
     * @dataProvider flattenDataProvider
     */
@@ -189,9 +203,9 @@ class FlattenExceptionTest extends \PHPUnit_Framework_TestCase
    public function testTooBigArray()
    {
        $a = array();
-        for ($i = 0; $i < 20; $i++) {
-            for ($j = 0; $j < 50; $j++) {
-                for ($k = 0; $k < 10; $k++) {
+        for ($i = 0; $i < 20; ++$i) {
+            for ($j = 0; $j < 50; ++$j) {
+                for ($k = 0; $k < 10; ++$k) {
                    $a[$i][$j][$k] = 'value';
                }
            }
--- a/Tests/ExceptionHandlerTest.php
+++ b/Tests/ExceptionHandlerTest.php
@@ -13,71 +13,97 @@ namespace Symfony\Component\Debug\Tests;

 use Symfony\Component\Debug\ExceptionHandler;
 use Symfony\Component\Debug\Exception\OutOfMemoryException;
-use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 use Symfony\Component\HttpKernel\Exception\MethodNotAllowedHttpException;

+require_once __DIR__.'/HeaderMock.php';
+
 class ExceptionHandlerTest extends \PHPUnit_Framework_TestCase
 {
+    protected function setUp()
+    {
+        testHeader();
+    }
+
+    protected function tearDown()
+    {
+        testHeader();
+    }
+
    public function testDebug()
    {
        $handler = new ExceptionHandler(false);
-        $response = $handler->createResponse(new \RuntimeException('Foo'));

-        $this->assertContains('<h1>Whoops, looks like something went wrong.</h1>', $response->getContent());
-        $this->assertNotContains('<h2 class="block_exception clear_fix">', $response->getContent());
+        ob_start();
+        $handler->sendPhpResponse(new \RuntimeException('Foo'));
+        $response = ob_get_clean();
+
+        $this->assertContains('<h1>Whoops, looks like something went wrong.</h1>', $response);
+        $this->assertNotContains('<h2 class="block_exception clear_fix">', $response);

        $handler = new ExceptionHandler(true);
-        $response = $handler->createResponse(new \RuntimeException('Foo'));

-        $this->assertContains('<h1>Whoops, looks like something went wrong.</h1>', $response->getContent());
-        $this->assertContains('<h2 class="block_exception clear_fix">', $response->getContent());
+        ob_start();
+        $handler->sendPhpResponse(new \RuntimeException('Foo'));
+        $response = ob_get_clean();
+
+        $this->assertContains('<h1>Whoops, looks like something went wrong.</h1>', $response);
+        $this->assertContains('<h2 class="block_exception clear_fix">', $response);
    }

    public function testStatusCode()
    {
-        $handler = new ExceptionHandler(false);
+        $handler = new ExceptionHandler(false, 'iso8859-1');

-        $response = $handler->createResponse(new \RuntimeException('Foo'));
-        $this->assertEquals('500', $response->getStatusCode());
-        $this->assertContains('Whoops, looks like something went wrong.', $response->getContent());
+        ob_start();
+        $handler->sendPhpResponse(new NotFoundHttpException('Foo'));
+        $response = ob_get_clean();

-        $response = $handler->createResponse(new NotFoundHttpException('Foo'));
-        $this->assertEquals('404', $response->getStatusCode());
-        $this->assertContains('Sorry, the page you are looking for could not be found.', $response->getContent());
+        $this->assertContains('Sorry, the page you are looking for could not be found.', $response);
+
+        $expectedHeaders = array(
+            array('HTTP/1.0 404', true, null),
+            array('Content-Type: text/html; charset=iso8859-1', true, null),
+        );
+
+        $this->assertSame($expectedHeaders, testHeader());
    }

    public function testHeaders()
    {
-        $handler = new ExceptionHandler(false);
+        $handler = new ExceptionHandler(false, 'iso8859-1');

-        $response = $handler->createResponse(new MethodNotAllowedHttpException(array('POST')));
-        $this->assertEquals('405', $response->getStatusCode());
-        $this->assertEquals('POST', $response->headers->get('Allow'));
+        ob_start();
+        $handler->sendPhpResponse(new MethodNotAllowedHttpException(array('POST')));
+        $response = ob_get_clean();
+
+        $expectedHeaders = array(
+            array('HTTP/1.0 405', true, null),
+            array('Allow: POST', false, null),
+            array('Content-Type: text/html; charset=iso8859-1', true, null),
+        );
+
+        $this->assertSame($expectedHeaders, testHeader());
    }

    public function testNestedExceptions()
    {
        $handler = new ExceptionHandler(true);
-        $response = $handler->createResponse(new \RuntimeException('Foo', 0, new \RuntimeException('Bar')));
+        ob_start();
+        $handler->sendPhpResponse(new \RuntimeException('Foo', 0, new \RuntimeException('Bar')));
+        $response = ob_get_clean();
+
+        $this->assertStringMatchesFormat('%A<span class="exception_message">Foo</span>%A<span class="exception_message">Bar</span>%A', $response);
    }

    public function testHandle()
    {
        $exception = new \Exception('foo');

-        if (class_exists('Symfony\Component\HttpFoundation\Response')) {
-            $handler = $this->getMock('Symfony\Component\Debug\ExceptionHandler', array('createResponse'));
-            $handler
-                ->expects($this->exactly(2))
-                ->method('createResponse')
-                ->will($this->returnValue(new Response()));
-        } else {
-            $handler = $this->getMock('Symfony\Component\Debug\ExceptionHandler', array('sendPhpResponse'));
-            $handler
-                ->expects($this->exactly(2))
-                ->method('sendPhpResponse');
-        }
+        $handler = $this->getMock('Symfony\Component\Debug\ExceptionHandler', array('sendPhpResponse'));
+        $handler
+            ->expects($this->exactly(2))
+            ->method('sendPhpResponse');

        $handler->handle($exception);

@@ -93,18 +119,10 @@ class ExceptionHandlerTest extends \PHPUnit_Framework_TestCase
    {
        $exception = new OutOfMemoryException('foo', 0, E_ERROR, __FILE__, __LINE__);

-        if (class_exists('Symfony\Component\HttpFoundation\Response')) {
-            $handler = $this->getMock('Symfony\Component\Debug\ExceptionHandler', array('createResponse'));
-            $handler
-                ->expects($this->once())
-                ->method('createResponse')
-                ->will($this->returnValue(new Response()));
-        } else {
-            $handler = $this->getMock('Symfony\Component\Debug\ExceptionHandler', array('sendPhpResponse'));
-            $handler
-                ->expects($this->once())
-                ->method('sendPhpResponse');
-        }
+        $handler = $this->getMock('Symfony\Component\Debug\ExceptionHandler', array('sendPhpResponse'));
+        $handler
+            ->expects($this->once())
+            ->method('sendPhpResponse');

        $that = $this;
        $handler->setHandler(function ($e) use ($that) {
--- a/Tests/FatalErrorHandler/ClassNotFoundFatalErrorHandlerTest.php
+++ b/Tests/FatalErrorHandler/ClassNotFoundFatalErrorHandlerTest.php
@@ -15,19 +15,53 @@ 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
 {
+    public static function setUpBeforeClass()
+    {
+        foreach (spl_autoload_functions() as $function) {
+            if (!is_array($function)) {
+                continue;
+            }
+
+            // get class loaders wrapped by DebugClassLoader
+            if ($function[0] instanceof DebugClassLoader) {
+                $function = $function[0]->getClassLoader();
+            }
+
+            if ($function[0] instanceof ComposerClassLoader) {
+                $function[0]->add('Symfony_Component_Debug_Tests_Fixtures', dirname(dirname(dirname(dirname(dirname(__DIR__))))));
+                break;
+            }
+        }
+    }
+
    /**
     * @dataProvider provideClassNotFoundData
     */
-    public function testHandleClassNotFound($error, $translatedMessage)
+    public function testHandleClassNotFound($error, $translatedMessage, $autoloader = null)
    {
+        if ($autoloader) {
+            // Unregister all autoloaders to ensure the custom provided
+            // autoloader is the only one to be used during the test run.
+            $autoloaders = spl_autoload_functions();
+            array_map('spl_autoload_unregister', $autoloaders);
+            spl_autoload_register($autoloader);
+        }
+
        $handler = new ClassNotFoundFatalErrorHandler();

        $exception = $handler->handleError($error, new FatalErrorException('', 0, $error['type'], $error['file'], $error['line']));

-        $this->assertInstanceof('Symfony\Component\Debug\Exception\ClassNotFoundException', $exception);
+        if ($autoloader) {
+            spl_autoload_unregister($autoloader);
+            array_map('spl_autoload_register', $autoloaders);
+        }
+
+        $this->assertInstanceOf('Symfony\Component\Debug\Exception\ClassNotFoundException', $exception);
        $this->assertSame($translatedMessage, $exception->getMessage());
        $this->assertSame($error['type'], $exception->getSeverity());
        $this->assertSame($error['file'], $exception->getFile());
@@ -35,34 +69,35 @@ class ClassNotFoundFatalErrorHandlerTest extends \PHPUnit_Framework_TestCase
    }

    /**
-     * @dataProvider provideLegacyClassNotFoundData
+     * @group legacy
     */
-    public function testLegacyHandleClassNotFound($error, $translatedMessage, $autoloader)
+    public function testLegacyHandleClassNotFound()
    {
-        $this->iniSet('error_reporting', -1 & ~E_USER_DEPRECATED);
+        $prefixes = array('Symfony\Component\Debug\Exception\\' => realpath(__DIR__.'/../../Exception'));
+        $symfonyUniversalClassLoader = new SymfonyUniversalClassLoader();
+        $symfonyUniversalClassLoader->registerPrefixes($prefixes);

-        // Unregister all autoloaders to ensure the custom provided
-        // autoloader is the only one to be used during the test run.
-        $autoloaders = spl_autoload_functions();
-        array_map('spl_autoload_unregister', $autoloaders);
-        spl_autoload_register($autoloader);
-
-        $handler = new ClassNotFoundFatalErrorHandler();
-
-        $exception = $handler->handleError($error, new FatalErrorException('', 0, $error['type'], $error['file'], $error['line']));
-
-        spl_autoload_unregister($autoloader);
-        array_map('spl_autoload_register', $autoloaders);
-
-        $this->assertInstanceof('Symfony\Component\Debug\Exception\ClassNotFoundException', $exception);
-        $this->assertSame($translatedMessage, $exception->getMessage());
-        $this->assertSame($error['type'], $exception->getSeverity());
-        $this->assertSame($error['file'], $exception->getFile());
-        $this->assertSame($error['line'], $exception->getLine());
+        $this->testHandleClassNotFound(
+            array(
+                'type' => 1,
+                'line' => 12,
+                'file' => 'foo.php',
+                'message' => 'Class \'Foo\\Bar\\UndefinedFunctionException\' not found',
+            ),
+            "Attempted to load class \"UndefinedFunctionException\" from namespace \"Foo\Bar\".\nDid you forget a \"use\" statement for \"Symfony\Component\Debug\Exception\UndefinedFunctionException\"?",
+            array($symfonyUniversalClassLoader, 'loadClass')
+        );
    }

    public function provideClassNotFoundData()
    {
+        $prefixes = array('Symfony\Component\Debug\Exception\\' => realpath(__DIR__.'/../../Exception'));
+
+        $symfonyAutoloader = new SymfonyClassLoader();
+        $symfonyAutoloader->addPrefixes($prefixes);
+
+        $debugClassLoader = new DebugClassLoader(array($symfonyAutoloader, 'loadClass'));
+
        return array(
            array(
                array(
@@ -109,20 +144,6 @@ class ClassNotFoundFatalErrorHandlerTest extends \PHPUnit_Framework_TestCase
                ),
                "Attempted to load class \"UndefinedFunctionException\" from namespace \"Foo\Bar\".\nDid you forget a \"use\" statement for \"Symfony\Component\Debug\Exception\UndefinedFunctionException\"?",
            ),
-        );
-    }
-
-    public function provideLegacyClassNotFoundData()
-    {
-        $prefixes = array('Symfony\Component\Debug\Exception\\' => realpath(__DIR__.'/../../Exception'));
-
-        $symfonyAutoloader = new SymfonyClassLoader();
-        $symfonyAutoloader->addPrefixes($prefixes);
-
-        $symfonyUniversalClassLoader = new SymfonyUniversalClassLoader();
-        $symfonyUniversalClassLoader->registerPrefixes($prefixes);
-
-        return array(
            array(
                array(
                    'type' => 1,
@@ -141,7 +162,7 @@ class ClassNotFoundFatalErrorHandlerTest extends \PHPUnit_Framework_TestCase
                    '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($symfonyUniversalClassLoader, 'loadClass'),
+                array($debugClassLoader, 'loadClass'),
            ),
            array(
                array(
@@ -158,11 +179,11 @@ class ClassNotFoundFatalErrorHandlerTest extends \PHPUnit_Framework_TestCase

    public function testCannotRedeclareClass()
    {
-        if (!file_exists(__DIR__.'/../FIXTURES/REQUIREDTWICE.PHP')) {
+        if (!file_exists(__DIR__.'/../FIXTURES2/REQUIREDTWICE.PHP')) {
            $this->markTestSkipped('Can only be run on case insensitive filesystems');
        }

-        require_once __DIR__.'/../FIXTURES/REQUIREDTWICE.PHP';
+        require_once __DIR__.'/../FIXTURES2/REQUIREDTWICE.PHP';

        $error = array(
            'type' => 1,
@@ -174,6 +195,6 @@ class ClassNotFoundFatalErrorHandlerTest extends \PHPUnit_Framework_TestCase
        $handler = new ClassNotFoundFatalErrorHandler();
        $exception = $handler->handleError($error, new FatalErrorException('', 0, $error['type'], $error['file'], $error['line']));

-        $this->assertInstanceof('Symfony\Component\Debug\Exception\ClassNotFoundException', $exception);
+        $this->assertInstanceOf('Symfony\Component\Debug\Exception\ClassNotFoundException', $exception);
    }
 }
--- a/Tests/FatalErrorHandler/UndefinedFunctionFatalErrorHandlerTest.php
+++ b/Tests/FatalErrorHandler/UndefinedFunctionFatalErrorHandlerTest.php
@@ -24,7 +24,7 @@ class UndefinedFunctionFatalErrorHandlerTest extends \PHPUnit_Framework_TestCase
        $handler = new UndefinedFunctionFatalErrorHandler();
        $exception = $handler->handleError($error, new FatalErrorException('', 0, $error['type'], $error['file'], $error['line']));

-        $this->assertInstanceof('Symfony\Component\Debug\Exception\UndefinedFunctionException', $exception);
+        $this->assertInstanceOf('Symfony\Component\Debug\Exception\UndefinedFunctionException', $exception);
        // class names are case insensitive and PHP/HHVM do not return the same
        $this->assertSame(strtolower($translatedMessage), strtolower($exception->getMessage()));
        $this->assertSame($error['type'], $exception->getSeverity());
--- a/Tests/FatalErrorHandler/UndefinedMethodFatalErrorHandlerTest.php
+++ b/Tests/FatalErrorHandler/UndefinedMethodFatalErrorHandlerTest.php
@@ -24,7 +24,7 @@ class UndefinedMethodFatalErrorHandlerTest extends \PHPUnit_Framework_TestCase
        $handler = new UndefinedMethodFatalErrorHandler();
        $exception = $handler->handleError($error, new FatalErrorException('', 0, $error['type'], $error['file'], $error['line']));

-        $this->assertInstanceof('Symfony\Component\Debug\Exception\UndefinedMethodException', $exception);
+        $this->assertInstanceOf('Symfony\Component\Debug\Exception\UndefinedMethodException', $exception);
        $this->assertSame($translatedMessage, $exception->getMessage());
        $this->assertSame($error['type'], $exception->getSeverity());
        $this->assertSame($error['file'], $exception->getFile());
@@ -41,7 +41,7 @@ class UndefinedMethodFatalErrorHandlerTest extends \PHPUnit_Framework_TestCase
                    'file' => 'foo.php',
                    'message' => 'Call to undefined method SplObjectStorage::what()',
                ),
-                'Attempted to call method "what" on class "SplObjectStorage".',
+                'Attempted to call an undefined method named "what" of class "SplObjectStorage".',
            ),
            array(
                array(
@@ -50,7 +50,7 @@ class UndefinedMethodFatalErrorHandlerTest extends \PHPUnit_Framework_TestCase
                    'file' => 'foo.php',
                    'message' => 'Call to undefined method SplObjectStorage::walid()',
                ),
-                "Attempted to call method \"walid\" on class \"SplObjectStorage\".\nDid you mean to call \"valid\"?",
+                "Attempted to call an undefined method named \"walid\" of class \"SplObjectStorage\".\nDid you mean to call \"valid\"?",
            ),
            array(
                array(
@@ -59,7 +59,7 @@ class UndefinedMethodFatalErrorHandlerTest extends \PHPUnit_Framework_TestCase
                    'file' => 'foo.php',
                    'message' => 'Call to undefined method SplObjectStorage::offsetFet()',
                ),
-                "Attempted to call method \"offsetFet\" on class \"SplObjectStorage\".\nDid you mean to call e.g. \"offsetGet\", \"offsetSet\" or \"offsetUnset\"?",
+                "Attempted to call an undefined method named \"offsetFet\" of class \"SplObjectStorage\".\nDid you mean to call e.g. \"offsetGet\", \"offsetSet\" or \"offsetUnset\"?",
            ),
        );
    }
--- a/Tests/Fixtures/DeprecatedClass.php
+++ b/Tests/Fixtures/DeprecatedClass.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace Symfony\Component\Debug\Tests\Fixtures;
+
+/**
+ * @deprecated but this is a test
+ *             deprecation notice.
+ * @foobar
+ */
+class DeprecatedClass
+{
+}
--- a/Tests/Fixtures/DeprecatedInterface.php
+++ b/Tests/Fixtures/DeprecatedInterface.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace Symfony\Component\Debug\Tests\Fixtures;
+
+/**
+ * @deprecated but this is a test
+ *             deprecation notice.
+ * @foobar
+ */
+interface DeprecatedInterface
+{
+}
--- a/Tests/Fixtures/RequiredTwice.php
+++ b/Tests/Fixtures/RequiredTwice.php
@@ -1,7 +0,0 @@
-<?php
-
-namespace Symfony\Component\Debug\Tests\Fixtures;
-
-class RequiredTwice
-{
-}
--- a/Tests/Fixtures2/RequiredTwice.php
+++ b/Tests/Fixtures2/RequiredTwice.php
@@ -0,0 +1,7 @@
+<?php
+
+namespace Symfony\Component\Debug\Tests\Fixtures2;
+
+class RequiredTwice
+{
+}
--- a/Tests/HeaderMock.php
+++ b/Tests/HeaderMock.php
@@ -0,0 +1,38 @@
+<?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;
+
+function headers_sent()
+{
+    return false;
+}
+
+function header($str, $replace = true, $status = null)
+{
+    Tests\testHeader($str, $replace, $status);
+}
+
+namespace Symfony\Component\Debug\Tests;
+
+function testHeader()
+{
+    static $headers = array();
+
+    if (!$h = func_get_args()) {
+        $h = $headers;
+        $headers = array();
+
+        return $h;
+    }
+
+    $headers[] = func_get_args();
+}
--- a/composer.json
+++ b/composer.json
@@ -3,7 +3,7 @@
    "type": "library",
    "description": "Symfony Debug Component",
    "keywords": [],
-    "homepage": "http://symfony.com",
+    "homepage": "https://symfony.com",
    "license": "MIT",
    "authors": [
        {
@@ -12,11 +12,11 @@
        },
        {
            "name": "Symfony Community",
-            "homepage": "http://symfony.com/contributors"
+            "homepage": "https://symfony.com/contributors"
        }
    ],
    "require": {
-        "php": ">=5.3.3",
+        "php": ">=5.3.9",
        "psr/log": "~1.0"
    },
    "conflict": {
@@ -24,21 +24,18 @@
    },
    "require-dev": {
        "symfony/class-loader": "~2.2",
-        "symfony/http-kernel": "~2.3.24|~2.5.9|~2.6,>=2.6.2",
-        "symfony/http-foundation": "~2.1"
-    },
-    "suggest": {
-        "symfony/http-foundation": "",
-        "symfony/http-kernel": ""
+        "symfony/http-kernel": "~2.3.24|~2.5.9|~2.6,>=2.6.2"
    },
    "autoload": {
-        "psr-0": { "Symfony\\Component\\Debug\\": "" }
+        "psr-4": { "Symfony\\Component\\Debug\\": "" },
+        "exclude-from-classmap": [
+            "/Tests/"
+        ]
    },
-    "target-dir": "Symfony/Component/Debug",
    "minimum-stability": "dev",
    "extra": {
        "branch-alias": {
-            "dev-master": "2.6-dev"
+            "dev-master": "2.7-dev"
        }
    }
 }
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -7,13 +7,16 @@
         bootstrap="vendor/autoload.php"
 >
    <php>
-        <!-- Silence E_USER_DEPRECATED (-16385 == -1 & ~E_USER_DEPRECATED) -->
-        <ini name="error_reporting" value="-16385"/>
+        <ini name="error_reporting" value="-1" />
    </php>
+
    <testsuites>
        <testsuite name="Symfony Debug Component Test Suite">
            <directory>./Tests/</directory>
        </testsuite>
+        <testsuite name="Symfony Debug Extension Test Suite">
+            <directory suffix=".phpt">./Resources/ext/tests/</directory>
+        </testsuite>
    </testsuites>

    <filter>