Remove branch-version (keep them for contracts only)

Fix branch-version
Remove "version" from composer.json files, use "branch-version" instead
2026-03-25 09:42:20 +01:00 · 2020-10-24 12:57:07 +02:00 · 2020-10-13 15:20:16 +02:00 · 2020-10-13 14:21:16 +02:00 · 2020-10-06 17:25:25 +02:00 · 2020-10-06 13:22:52 +02:00
58 changed files with 1638 additions and 1046 deletions
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,3 +0,0 @@
-/Tests export-ignore
-/phpunit.xml.dist export-ignore
-/.gitignore export-ignore
--- a/BufferingLogger.php
+++ b/BufferingLogger.php
@@ -13,22 +13,15 @@ namespace Symfony\Component\Debug;

 use Psr\Log\AbstractLogger;

-@trigger_error(sprintf('The "%s" class is deprecated since Symfony 4.4, use "%s" instead.', BufferingLogger::class, \Symfony\Component\ErrorHandler\BufferingLogger::class), E_USER_DEPRECATED);
-
 /**
 * A buffering logger that stacks logs for later.
 *
 * @author Nicolas Grekas <p@tchwork.com>
- *
- * @deprecated since Symfony 4.4, use Symfony\Component\ErrorHandler\BufferingLogger instead.
 */
 class BufferingLogger extends AbstractLogger
 {
    private $logs = [];

-    /**
-     * @return void
-     */
    public function log($level, $message, array $context = [])
    {
        $this->logs[] = [$level, $message, $context];
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,26 +1,6 @@
 CHANGELOG
 =========

-4.4.0
-----
-
- * deprecated `FlattenException`, use the `FlattenException` of the `ErrorHandler` component
- * deprecated the whole component in favor of the `ErrorHandler` component
-
-4.3.0
-----
-
-* made the `ErrorHandler` and `ExceptionHandler` classes final
-* added `Exception\FlattenException::getAsString` and
-`Exception\FlattenException::getTraceAsString` to increase compatibility to php
-exception objects
-
-4.0.0
-----
-
-* removed the symfony_debug extension
-* removed `ContextErrorException`
-
 3.4.0
 -----

--- a/Debug.php
+++ b/Debug.php
@@ -11,14 +11,10 @@

 namespace Symfony\Component\Debug;

-@trigger_error(sprintf('The "%s" class is deprecated since Symfony 4.4, use "%s" instead.', Debug::class, \Symfony\Component\ErrorHandler\Debug::class), E_USER_DEPRECATED);
-
 /**
 * Registers all the debug tools.
 *
 * @author Fabien Potencier <fabien@symfony.com>
- *
- * @deprecated since Symfony 4.4, use Symfony\Component\ErrorHandler\Debug instead.
 */
 class Debug
 {
@@ -27,12 +23,12 @@ class Debug
    /**
     * Enables the debug tools.
     *
-     * This method registers an error handler and an exception handler.
+     * This method registers an error handler, an exception handler and a special class loader.
     *
     * @param int  $errorReportingLevel The level of error reporting you want
     * @param bool $displayErrors       Whether to display errors (for development) or just log them (for production)
     */
-    public static function enable($errorReportingLevel = E_ALL, $displayErrors = true)
+    public static function enable($errorReportingLevel = \E_ALL, $displayErrors = true)
    {
        if (static::$enabled) {
            return;
@@ -43,13 +39,13 @@ class Debug
        if (null !== $errorReportingLevel) {
            error_reporting($errorReportingLevel);
        } else {
-            error_reporting(E_ALL);
+            error_reporting(\E_ALL);
        }

        if (!\in_array(\PHP_SAPI, ['cli', 'phpdbg'], true)) {
            ini_set('display_errors', 0);
            ExceptionHandler::register();
-        } elseif ($displayErrors && (!filter_var(ini_get('log_errors'), FILTER_VALIDATE_BOOLEAN) || ini_get('error_log'))) {
+        } elseif ($displayErrors && (!filter_var(ini_get('log_errors'), \FILTER_VALIDATE_BOOLEAN) || ini_get('error_log'))) {
            // CLI - display errors only if they're not already logged to STDERR
            ini_set('display_errors', 1);
        }
--- a/DebugClassLoader.php
+++ b/DebugClassLoader.php
@@ -11,10 +11,6 @@

 namespace Symfony\Component\Debug;

-use PHPUnit\Framework\MockObject\Matcher\StatelessInvocation;
-
-@trigger_error(sprintf('The "%s" class is deprecated since Symfony 4.4, use "%s" instead.', DebugClassLoader::class, \Symfony\Component\ErrorHandler\DebugClassLoader::class), E_USER_DEPRECATED);
-
 /**
 * Autoloader checking if the class is really defined in the file found.
 *
@@ -25,9 +21,6 @@ use PHPUnit\Framework\MockObject\Matcher\StatelessInvocation;
 * @author Fabien Potencier <fabien@symfony.com>
 * @author Christophe Coevoet <stof@notk.org>
 * @author Nicolas Grekas <p@tchwork.com>
- * @author Guilhem Niot <guilhem.niot@gmail.com>
- *
- * @deprecated since Symfony 4.4, use Symfony\Component\ErrorHandler\DebugClassLoader instead.
 */
 class DebugClassLoader
 {
@@ -41,9 +34,8 @@ class DebugClassLoader
    private static $deprecated = [];
    private static $internal = [];
    private static $internalMethods = [];
-    private static $annotatedParameters = [];
+    private static $php7Reserved = ['int' => 1, 'float' => 1, 'bool' => 1, 'string' => 1, 'true' => 1, 'false' => 1, 'null' => 1];
    private static $darwinCache = ['/' => ['/', []]];
-    private static $method = [];

    public function __construct(callable $classLoader)
    {
@@ -64,7 +56,7 @@ class DebugClassLoader
            } elseif (substr($test, -\strlen($file)) === $file) {
                // filesystem is case insensitive and realpath() normalizes the case of characters
                self::$caseCheck = 1;
-            } elseif (false !== stripos(PHP_OS, 'darwin')) {
+            } elseif (false !== stripos(\PHP_OS, 'darwin')) {
                // on MacOSX, HFS+ is case insensitive but realpath() doesn't normalize the case of characters
                self::$caseCheck = 2;
            } else {
@@ -149,7 +141,7 @@ class DebugClassLoader
     */
    public function loadClass($class)
    {
-        $e = error_reporting(error_reporting() | E_PARSE | E_ERROR | E_CORE_ERROR | E_COMPILE_ERROR);
+        $e = error_reporting(error_reporting() | \E_PARSE | \E_ERROR | \E_CORE_ERROR | \E_COMPILE_ERROR);

        try {
            if ($this->isFinder && !isset($this->loaded[$class])) {
@@ -164,7 +156,7 @@ class DebugClassLoader
                    return;
                }
            } else {
-                ($this->classLoader)($class);
+                \call_user_func($this->classLoader, $class);
                $file = false;
            }
        } finally {
@@ -174,7 +166,7 @@ class DebugClassLoader
        $this->checkClass($class, $file);
    }

-    private function checkClass(string $class, string $file = null)
+    private function checkClass($class, $file = null)
    {
        $exists = null === $file || class_exists($class, false) || interface_exists($class, false) || trait_exists($class, false);

@@ -200,8 +192,12 @@ class DebugClassLoader

            $deprecations = $this->checkAnnotations($refl, $name);

+            if (isset(self::$php7Reserved[strtolower($refl->getShortName())])) {
+                $deprecations[] = sprintf('The "%s" class uses the reserved name "%s", it will break on PHP 7 and higher', $name, $refl->getShortName());
+            }
+
            foreach ($deprecations as $message) {
-                @trigger_error($message, E_USER_DEPRECATED);
+                @trigger_error($message, \E_USER_DEPRECATED);
            }
        }

@@ -241,28 +237,10 @@ class DebugClassLoader
                    self::${$annotation}[$class] = isset($notice[1]) ? preg_replace('#\.?\r?\n( \*)? *(?= |\r?\n|$)#', '', $notice[1]) : '';
                }
            }
-
-            if ($refl->isInterface() && false !== strpos($doc, 'method') && preg_match_all('#\n \* @method\s+(static\s+)?+(?:[\w\|&\[\]\\\]+\s+)?(\w+(?:\s*\([^\)]*\))?)+(.+?([[:punct:]]\s*)?)?(?=\r?\n \*(?: @|/$|\r?\n))#', $doc, $notice, PREG_SET_ORDER)) {
-                foreach ($notice as $method) {
-                    $static = '' !== $method[1];
-                    $name = $method[2];
-                    $description = $method[3] ?? null;
-                    if (false === strpos($name, '(')) {
-                        $name .= '()';
-                    }
-                    if (null !== $description) {
-                        $description = trim($description);
-                        if (!isset($method[4])) {
-                            $description .= '.';
-                        }
-                    }
-                    self::$method[$class][] = [$class, $name, $static, $description];
-                }
-            }
        }

        $parent = get_parent_class($class);
-        $parentAndOwnInterfaces = $this->getOwnInterfaces($class, $parent ?: null);
+        $parentAndOwnInterfaces = $this->getOwnInterfaces($class, $parent);
        if ($parent) {
            $parentAndOwnInterfaces[$parent] = $parent;

@@ -289,40 +267,17 @@ class DebugClassLoader
            if (isset(self::$internal[$use]) && strncmp($ns, str_replace('_', '\\', $use), $len)) {
                $deprecations[] = sprintf('The "%s" %s is considered internal%s. It may change without further notice. You should not use it from "%s".', $use, class_exists($use, false) ? 'class' : (interface_exists($use, false) ? 'interface' : 'trait'), self::$internal[$use], $class);
            }
-            if (isset(self::$method[$use])) {
-                if ($refl->isAbstract()) {
-                    if (isset(self::$method[$class])) {
-                        self::$method[$class] = array_merge(self::$method[$class], self::$method[$use]);
-                    } else {
-                        self::$method[$class] = self::$method[$use];
-                    }
-                } elseif (!$refl->isInterface()) {
-                    $hasCall = $refl->hasMethod('__call');
-                    $hasStaticCall = $refl->hasMethod('__callStatic');
-                    foreach (self::$method[$use] as $method) {
-                        list($interface, $name, $static, $description) = $method;
-                        if ($static ? $hasStaticCall : $hasCall) {
-                            continue;
-                        }
-                        $realName = substr($name, 0, strpos($name, '('));
-                        if (!$refl->hasMethod($realName) || !($methodRefl = $refl->getMethod($realName))->isPublic() || ($static && !$methodRefl->isStatic()) || (!$static && $methodRefl->isStatic())) {
-                            $deprecations[] = sprintf('Class "%s" should implement method "%s::%s"%s', $class, ($static ? 'static ' : '').$interface, $name, null == $description ? '.' : ': '.$description);
-                        }
-                    }
-                }
-            }
        }

        if (trait_exists($class)) {
            return $deprecations;
        }

-        // Inherit @final, @internal and @param annotations for methods
+        // Inherit @final and @internal annotations for methods
        self::$finalMethods[$class] = [];
        self::$internalMethods[$class] = [];
-        self::$annotatedParameters[$class] = [];
        foreach ($parentAndOwnInterfaces as $use) {
-            foreach (['finalMethods', 'internalMethods', 'annotatedParameters'] as $property) {
+            foreach (['finalMethods', 'internalMethods'] as $property) {
                if (isset(self::${$property}[$use])) {
                    self::${$property}[$class] = self::${$property}[$class] ? self::${$property}[$use] + self::${$property}[$class] : self::${$property}[$use];
                }
@@ -346,52 +301,15 @@ class DebugClassLoader
                }
            }

-            // To read method annotations
-            $doc = $method->getDocComment();
-
-            if (isset(self::$annotatedParameters[$class][$method->name])) {
-                $definedParameters = [];
-                foreach ($method->getParameters() as $parameter) {
-                    $definedParameters[$parameter->name] = true;
-                }
-
-                foreach (self::$annotatedParameters[$class][$method->name] as $parameterName => $deprecation) {
-                    if (!isset($definedParameters[$parameterName]) && !($doc && preg_match("/\\n\\s+\\* @param +((?(?!callable *\().*?|callable *\(.*\).*?))(?<= )\\\${$parameterName}\\b/", $doc))) {
-                        $deprecations[] = sprintf($deprecation, $class);
-                    }
-                }
-            }
-
-            if (!$doc) {
+            // Detect method annotations
+            if (false === $doc = $method->getDocComment()) {
                continue;
            }

-            $finalOrInternal = false;
-
            foreach (['final', 'internal'] as $annotation) {
                if (false !== strpos($doc, $annotation) && preg_match('#\n\s+\* @'.$annotation.'(?:( .+?)\.?)?\r?\n\s+\*(?: @|/$|\r?\n)#s', $doc, $notice)) {
                    $message = isset($notice[1]) ? preg_replace('#\.?\r?\n( \*)? *(?= |\r?\n|$)#', '', $notice[1]) : '';
                    self::${$annotation.'Methods'}[$class][$method->name] = [$class, $message];
-                    $finalOrInternal = true;
-                }
-            }
-
-            if ($finalOrInternal || $method->isConstructor() || false === strpos($doc, '@param') || StatelessInvocation::class === $class) {
-                continue;
-            }
-            if (!preg_match_all('#\n\s+\* @param +((?(?!callable *\().*?|callable *\(.*\).*?))(?<= )\$([a-zA-Z0-9_\x7f-\xff]++)#', $doc, $matches, PREG_SET_ORDER)) {
-                continue;
-            }
-            if (!isset(self::$annotatedParameters[$class][$method->name])) {
-                $definedParameters = [];
-                foreach ($method->getParameters() as $parameter) {
-                    $definedParameters[$parameter->name] = true;
-                }
-            }
-            foreach ($matches as list(, $parameterType, $parameterName)) {
-                if (!isset($definedParameters[$parameterName])) {
-                    $parameterType = trim($parameterType);
-                    self::$annotatedParameters[$class][$method->name][$parameterName] = sprintf('The "%%s::%s()" method will require a new "%s$%s" argument in the next major version of its parent class "%s", not defining it is deprecated.', $method->name, $parameterType ? $parameterType.' ' : '', $parameterName, $method->class);
                }
            }
        }
@@ -444,7 +362,7 @@ class DebugClassLoader
    /**
     * `realpath` on MacOSX doesn't normalize the case of characters.
     */
-    private function darwinRealpath(string $real): string
+    private function darwinRealpath($real)
    {
        $i = 1 + strrpos($real, '/');
        $file = substr($real, $i);
@@ -511,9 +429,12 @@ class DebugClassLoader
    /**
     * `class_implements` includes interfaces from the parents so we have to manually exclude them.
     *
+     * @param string       $class
+     * @param string|false $parent
+     *
     * @return string[]
     */
-    private function getOwnInterfaces(string $class, ?string $parent): array
+    private function getOwnInterfaces($class, $parent)
    {
        $ownInterfaces = class_implements($class, false);

--- a/ErrorHandler.php
+++ b/ErrorHandler.php
@@ -13,9 +13,9 @@ namespace Symfony\Component\Debug;

 use Psr\Log\LoggerInterface;
 use Psr\Log\LogLevel;
+use Symfony\Component\Debug\Exception\ContextErrorException;
 use Symfony\Component\Debug\Exception\FatalErrorException;
 use Symfony\Component\Debug\Exception\FatalThrowableError;
-use Symfony\Component\Debug\Exception\FlattenException;
 use Symfony\Component\Debug\Exception\OutOfMemoryException;
 use Symfony\Component\Debug\Exception\SilencedErrorContext;
 use Symfony\Component\Debug\FatalErrorHandler\ClassNotFoundFatalErrorHandler;
@@ -23,8 +23,6 @@ use Symfony\Component\Debug\FatalErrorHandler\FatalErrorHandlerInterface;
 use Symfony\Component\Debug\FatalErrorHandler\UndefinedFunctionFatalErrorHandler;
 use Symfony\Component\Debug\FatalErrorHandler\UndefinedMethodFatalErrorHandler;

-@trigger_error(sprintf('The "%s" class is deprecated since Symfony 4.4, use "%s" instead.', ErrorHandler::class, \Symfony\Component\ErrorHandler\ErrorHandler::class), E_USER_DEPRECATED);
-
 /**
 * A generic ErrorHandler for the PHP engine.
 *
@@ -47,47 +45,43 @@ use Symfony\Component\Debug\FatalErrorHandler\UndefinedMethodFatalErrorHandler;
 *
 * @author Nicolas Grekas <p@tchwork.com>
 * @author Grégoire Pineau <lyrixx@lyrixx.info>
- *
- * @final since Symfony 4.3
- *
- * @deprecated since Symfony 4.4, use Symfony\Component\ErrorHandler\ErrorHandler instead.
 */
 class ErrorHandler
 {
    private $levels = [
-        E_DEPRECATED => 'Deprecated',
-        E_USER_DEPRECATED => 'User Deprecated',
-        E_NOTICE => 'Notice',
-        E_USER_NOTICE => 'User Notice',
-        E_STRICT => 'Runtime Notice',
-        E_WARNING => 'Warning',
-        E_USER_WARNING => 'User Warning',
-        E_COMPILE_WARNING => 'Compile Warning',
-        E_CORE_WARNING => 'Core Warning',
-        E_USER_ERROR => 'User Error',
-        E_RECOVERABLE_ERROR => 'Catchable Fatal Error',
-        E_COMPILE_ERROR => 'Compile Error',
-        E_PARSE => 'Parse Error',
-        E_ERROR => 'Error',
-        E_CORE_ERROR => 'Core Error',
+        \E_DEPRECATED => 'Deprecated',
+        \E_USER_DEPRECATED => 'User Deprecated',
+        \E_NOTICE => 'Notice',
+        \E_USER_NOTICE => 'User Notice',
+        \E_STRICT => 'Runtime Notice',
+        \E_WARNING => 'Warning',
+        \E_USER_WARNING => 'User Warning',
+        \E_COMPILE_WARNING => 'Compile Warning',
+        \E_CORE_WARNING => 'Core Warning',
+        \E_USER_ERROR => 'User Error',
+        \E_RECOVERABLE_ERROR => 'Catchable Fatal Error',
+        \E_COMPILE_ERROR => 'Compile Error',
+        \E_PARSE => 'Parse Error',
+        \E_ERROR => 'Error',
+        \E_CORE_ERROR => 'Core Error',
    ];

    private $loggers = [
-        E_DEPRECATED => [null, LogLevel::INFO],
-        E_USER_DEPRECATED => [null, LogLevel::INFO],
-        E_NOTICE => [null, LogLevel::WARNING],
-        E_USER_NOTICE => [null, LogLevel::WARNING],
-        E_STRICT => [null, LogLevel::WARNING],
-        E_WARNING => [null, LogLevel::WARNING],
-        E_USER_WARNING => [null, LogLevel::WARNING],
-        E_COMPILE_WARNING => [null, LogLevel::WARNING],
-        E_CORE_WARNING => [null, LogLevel::WARNING],
-        E_USER_ERROR => [null, LogLevel::CRITICAL],
-        E_RECOVERABLE_ERROR => [null, LogLevel::CRITICAL],
-        E_COMPILE_ERROR => [null, LogLevel::CRITICAL],
-        E_PARSE => [null, LogLevel::CRITICAL],
-        E_ERROR => [null, LogLevel::CRITICAL],
-        E_CORE_ERROR => [null, LogLevel::CRITICAL],
+        \E_DEPRECATED => [null, LogLevel::INFO],
+        \E_USER_DEPRECATED => [null, LogLevel::INFO],
+        \E_NOTICE => [null, LogLevel::WARNING],
+        \E_USER_NOTICE => [null, LogLevel::WARNING],
+        \E_STRICT => [null, LogLevel::WARNING],
+        \E_WARNING => [null, LogLevel::WARNING],
+        \E_USER_WARNING => [null, LogLevel::WARNING],
+        \E_COMPILE_WARNING => [null, LogLevel::WARNING],
+        \E_CORE_WARNING => [null, LogLevel::WARNING],
+        \E_USER_ERROR => [null, LogLevel::CRITICAL],
+        \E_RECOVERABLE_ERROR => [null, LogLevel::CRITICAL],
+        \E_COMPILE_ERROR => [null, LogLevel::CRITICAL],
+        \E_PARSE => [null, LogLevel::CRITICAL],
+        \E_ERROR => [null, LogLevel::CRITICAL],
+        \E_CORE_ERROR => [null, LogLevel::CRITICAL],
    ];

    private $thrownErrors = 0x1FFF; // E_ALL - E_DEPRECATED - E_USER_DEPRECATED
@@ -103,6 +97,8 @@ class ErrorHandler
    private $bootstrappingLogger;

    private static $reservedMemory;
+    private static $stackedErrors = [];
+    private static $stackedErrorLevels = [];
    private static $toStringException = null;
    private static $silencedErrorCache = [];
    private static $silencedErrorCount = 0;
@@ -158,7 +154,7 @@ class ErrorHandler
            $handler->setExceptionHandler($prev);
        }

-        $handler->throwAt(E_ALL & $handler->thrownErrors, true);
+        $handler->throwAt(\E_ALL & $handler->thrownErrors, true);

        return $handler;
    }
@@ -176,10 +172,11 @@ class ErrorHandler
    /**
     * Sets a logger to non assigned errors levels.
     *
-     * @param array|int $levels  An array map of E_* to LogLevel::* or an integer bit field of E_* constants
-     * @param bool      $replace Whether to replace or not any existing logger
+     * @param LoggerInterface $logger  A PSR-3 logger to put as default for the given levels
+     * @param array|int       $levels  An array map of E_* to LogLevel::* or an integer bit field of E_* constants
+     * @param bool            $replace Whether to replace or not any existing logger
     */
-    public function setDefaultLogger(LoggerInterface $logger, $levels = E_ALL, $replace = false)
+    public function setDefaultLogger(LoggerInterface $logger, $levels = \E_ALL, $replace = false)
    {
        $loggers = [];

@@ -191,7 +188,7 @@ class ErrorHandler
            }
        } else {
            if (null === $levels) {
-                $levels = E_ALL;
+                $levels = \E_ALL;
            }
            foreach ($this->loggers as $type => $log) {
                if (($type & $levels) && (empty($log[0]) || $replace || $log[0] === $this->bootstrappingLogger)) {
@@ -226,14 +223,14 @@ class ErrorHandler
            if (!\is_array($log)) {
                $log = [$log];
            } elseif (!\array_key_exists(0, $log)) {
-                throw new \InvalidArgumentException('No logger provided');
+                throw new \InvalidArgumentException('No logger provided.');
            }
            if (null === $log[0]) {
                $this->loggedErrors &= ~$type;
            } elseif ($log[0] instanceof LoggerInterface) {
                $this->loggedErrors |= $type;
            } else {
-                throw new \InvalidArgumentException('Invalid logger provided');
+                throw new \InvalidArgumentException('Invalid logger provided.');
            }
            $this->loggers[$type] = $log + $prev[$type];

@@ -245,7 +242,7 @@ class ErrorHandler

        if ($flush) {
            foreach ($this->bootstrappingLogger->cleanLogs() as $log) {
-                $type = $log[2]['exception'] instanceof \ErrorException ? $log[2]['exception']->getSeverity() : E_ERROR;
+                $type = $log[2]['exception'] instanceof \ErrorException ? $log[2]['exception']->getSeverity() : \E_ERROR;
                if (!isset($flush[$type])) {
                    $this->bootstrappingLogger->log($log[0], $log[1], $log[2]);
                } elseif ($this->loggers[$type][0]) {
@@ -283,7 +280,7 @@ class ErrorHandler
    public function throwAt($levels, $replace = false)
    {
        $prev = $this->thrownErrors;
-        $this->thrownErrors = ($levels | E_RECOVERABLE_ERROR | E_USER_ERROR) & ~E_USER_DEPRECATED & ~E_DEPRECATED;
+        $this->thrownErrors = ($levels | \E_RECOVERABLE_ERROR | \E_USER_ERROR) & ~\E_USER_DEPRECATED & ~\E_DEPRECATED;
        if (!$replace) {
            $this->thrownErrors |= $prev;
        }
@@ -352,7 +349,7 @@ class ErrorHandler
    /**
     * Re-registers as a PHP error handler if levels changed.
     */
-    private function reRegister(int $prev)
+    private function reRegister($prev)
    {
        if ($prev !== $this->thrownErrors | $this->loggedErrors) {
            $handler = set_error_handler('var_dump');
@@ -385,15 +382,15 @@ class ErrorHandler
     */
    public function handleError($type, $message, $file, $line)
    {
-        if (\PHP_VERSION_ID >= 70300 && E_WARNING === $type && '"' === $message[0] && false !== strpos($message, '" targeting switch is equivalent to "break')) {
-            $type = E_DEPRECATED;
+        if (\PHP_VERSION_ID >= 70300 && \E_WARNING === $type && '"' === $message[0] && false !== strpos($message, '" targeting switch is equivalent to "break')) {
+            $type = \E_DEPRECATED;
        }

        // Level is the current error reporting level to manage silent error.
        $level = error_reporting();
        $silenced = 0 === ($level & $type);
        // Strong errors are not authorized to be silenced.
-        $level |= E_RECOVERABLE_ERROR | E_USER_ERROR | E_DEPRECATED | E_USER_DEPRECATED;
+        $level |= \E_RECOVERABLE_ERROR | \E_USER_ERROR | \E_DEPRECATED | \E_USER_DEPRECATED;
        $log = $this->loggedErrors & $type;
        $throw = $this->thrownErrors & $type & $level;
        $type &= $level | $this->screamedErrors;
@@ -404,9 +401,11 @@ class ErrorHandler
        $scope = $this->scopedErrors & $type;

        if (4 < $numArgs = \func_num_args()) {
-            $context = $scope ? (func_get_arg(4) ?: []) : [];
+            $context = func_get_arg(4) ?: [];
+            $backtrace = 5 < $numArgs ? func_get_arg(5) : null; // defined on HHVM
        } else {
            $context = [];
+            $backtrace = null;
        }

        if (isset($context['GLOBALS']) && $scope) {
@@ -415,19 +414,24 @@ class ErrorHandler
            $context = $e;
        }

-        if (false !== strpos($message, "class@anonymous\0")) {
-            $logMessage = $this->levels[$type].': '.(new FlattenException())->setMessage($message)->getMessage();
-        } else {
-            $logMessage = $this->levels[$type].': '.$message;
+        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;
        }

+        $logMessage = $this->levels[$type].': '.$message;
+
        if (null !== self::$toStringException) {
            $errorAsException = self::$toStringException;
            self::$toStringException = null;
        } elseif (!$throw && !($type & $level)) {
            if (!isset(self::$silencedErrorCache[$id = $file.':'.$line])) {
-                $lightTrace = $this->tracedErrors & $type ? $this->cleanTrace(debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 5), $type, $file, $line, false) : [];
-                $errorAsException = new SilencedErrorContext($type, $file, $line, isset($lightTrace[1]) ? [$lightTrace[0]] : $lightTrace);
+                $lightTrace = $this->tracedErrors & $type ? $this->cleanTrace(debug_backtrace(\DEBUG_BACKTRACE_IGNORE_ARGS, 3), $type, $file, $line, false) : [];
+                $errorAsException = new SilencedErrorContext($type, $file, $line, $lightTrace);
            } elseif (isset(self::$silencedErrorCache[$id][$message])) {
                $lightTrace = null;
                $errorAsException = self::$silencedErrorCache[$id][$message];
@@ -448,20 +452,24 @@ class ErrorHandler
                return true;
            }
        } else {
-            $errorAsException = new \ErrorException($logMessage, 0, $type, $file, $line);
+            if ($scope) {
+                $errorAsException = new ContextErrorException($logMessage, 0, $type, $file, $line, $context);
+            } else {
+                $errorAsException = new \ErrorException($logMessage, 0, $type, $file, $line);
+            }

+            // Clean the trace by removing function arguments and the first frames added by the error handler itself.
            if ($throw || $this->tracedErrors & $type) {
-                $backtrace = $errorAsException->getTrace();
+                $backtrace = $backtrace ?: $errorAsException->getTrace();
                $lightTrace = $this->cleanTrace($backtrace, $type, $file, $line, $throw);
                $this->traceReflector->setValue($errorAsException, $lightTrace);
            } else {
                $this->traceReflector->setValue($errorAsException, []);
-                $backtrace = [];
            }
        }

        if ($throw) {
-            if (\PHP_VERSION_ID < 70400 && E_USER_ERROR & $type) {
+            if (\PHP_VERSION_ID < 70400 && \E_USER_ERROR & $type) {
                for ($i = 1; isset($backtrace[$i]); ++$i) {
                    if (isset($backtrace[$i]['function'], $backtrace[$i]['type'], $backtrace[$i - 1]['function'])
                        && '__toString' === $backtrace[$i]['function']
@@ -470,25 +478,32 @@ class ErrorHandler
                        && ('trigger_error' === $backtrace[$i - 1]['function'] || 'user_error' === $backtrace[$i - 1]['function'])
                    ) {
                        // Here, we know trigger_error() has been called from __toString().
-                        // PHP triggers a fatal error when throwing from __toString().
+                        // HHVM is fine with throwing from __toString() but PHP triggers a fatal error instead.
                        // A small convention allows working around the limitation:
                        // given a caught $e exception in __toString(), quitting the method with
                        // `return trigger_error($e, E_USER_ERROR);` allows this error handler
                        // to make $e get through the __toString() barrier.

                        foreach ($context as $e) {
-                            if ($e instanceof \Throwable && $e->__toString() === $message) {
+                            if (($e instanceof \Exception || $e instanceof \Throwable) && $e->__toString() === $message) {
+                                if (1 === $i) {
+                                    // On HHVM
+                                    $errorAsException = $e;
+                                    break;
+                                }
                                self::$toStringException = $e;

                                return true;
                            }
                        }

-                        // Display the original error message instead of the default one.
-                        $this->handleException($errorAsException);
+                        if (1 < $i) {
+                            // On PHP (not on HHVM), display the original error message instead of the default one.
+                            $this->handleException($errorAsException);

-                        // Stop the process by giving back the error to the native handler.
-                        return false;
+                            // Stop the process by giving back the error to the native handler.
+                            return false;
+                        }
                    }
                }
            }
@@ -498,8 +513,15 @@ class ErrorHandler

        if ($this->isRecursive) {
            $log = 0;
+        } elseif (self::$stackedErrorLevels) {
+            self::$stackedErrors[] = [
+                $this->loggers[$type][0],
+                ($type & $level) ? $this->loggers[$type][1] : LogLevel::DEBUG,
+                $logMessage,
+                $errorAsException ? ['exception' => $errorAsException] : [],
+            ];
        } else {
-            if (!\defined('HHVM_VERSION')) {
+            if (\PHP_VERSION_ID < (\PHP_VERSION_ID < 70400 ? 70316 : 70404) && !\defined('HHVM_VERSION')) {
                $currentErrorHandler = set_error_handler('var_dump');
                restore_error_handler();
            }
@@ -511,7 +533,7 @@ class ErrorHandler
            } finally {
                $this->isRecursive = false;

-                if (!\defined('HHVM_VERSION')) {
+                if (\PHP_VERSION_ID < (\PHP_VERSION_ID < 70400 ? 70316 : 70404) && !\defined('HHVM_VERSION')) {
                    set_error_handler($currentErrorHandler);
                }
            }
@@ -536,33 +558,31 @@ class ErrorHandler
        if (!$exception instanceof \Exception) {
            $exception = new FatalThrowableError($exception);
        }
-        $type = $exception instanceof FatalErrorException ? $exception->getSeverity() : E_ERROR;
+        $type = $exception instanceof FatalErrorException ? $exception->getSeverity() : \E_ERROR;
        $handlerException = null;

        if (($this->loggedErrors & $type) || $exception instanceof FatalThrowableError) {
-            if (false !== strpos($message = $exception->getMessage(), "class@anonymous\0")) {
-                $message = (new FlattenException())->setMessage($message)->getMessage();
-            }
            if ($exception instanceof FatalErrorException) {
                if ($exception instanceof FatalThrowableError) {
                    $error = [
                        'type' => $type,
-                        'message' => $message,
+                        'message' => $message = $exception->getMessage(),
                        'file' => $exception->getFile(),
                        'line' => $exception->getLine(),
                    ];
                } else {
-                    $message = 'Fatal '.$message;
+                    $message = 'Fatal '.$exception->getMessage();
                }
            } elseif ($exception instanceof \ErrorException) {
-                $message = 'Uncaught '.$message;
+                $message = 'Uncaught '.$exception->getMessage();
            } else {
-                $message = 'Uncaught Exception: '.$message;
+                $message = 'Uncaught Exception: '.$exception->getMessage();
            }
        }
        if ($this->loggedErrors & $type) {
            try {
                $this->loggers[$type][0]->log($this->loggers[$type][1], $message, ['exception' => $exception]);
+            } catch (\Exception $handlerException) {
            } catch (\Throwable $handlerException) {
            }
        }
@@ -583,6 +603,7 @@ class ErrorHandler
                return;
            }
            $handlerException = $handlerException ?: $exception;
+        } catch (\Exception $handlerException) {
        } catch (\Throwable $handlerException) {
        }
        if ($exception === $handlerException) {
@@ -643,7 +664,17 @@ class ErrorHandler
            $error = error_get_last();
        }

-        if ($error && $error['type'] &= E_PARSE | E_ERROR | E_CORE_ERROR | E_COMPILE_ERROR) {
+        try {
+            while (self::$stackedErrorLevels) {
+                static::unstackErrors();
+            }
+        } catch (\Exception $exception) {
+            // Handled below
+        } catch (\Throwable $exception) {
+            // Handled below
+        }
+
+        if ($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;
@@ -653,12 +684,10 @@ class ErrorHandler
            } else {
                $exception = new FatalErrorException($handler->levels[$error['type']].': '.$error['message'], 0, $error['type'], $error['file'], $error['line'], 2, true, $trace);
            }
-        } else {
-            $exception = null;
        }

        try {
-            if (null !== $exception) {
+            if (isset($exception)) {
                self::$exitCode = 255;
                $handler->handleException($exception, $error);
            }
@@ -672,6 +701,55 @@ class ErrorHandler
        }
    }

+    /**
+     * Configures the error handler for delayed handling.
+     * Ensures also that non-catchable fatal errors are never silenced.
+     *
+     * As shown by http://bugs.php.net/42098 and http://bugs.php.net/60724
+     * PHP has a compile stage where it behaves unusually. To workaround it,
+     * we plug an error handler that only stacks errors for later.
+     *
+     * The most important feature of this is to prevent
+     * autoloading until unstackErrors() is called.
+     *
+     * @deprecated since version 3.4, to be removed in 4.0.
+     */
+    public static function stackErrors()
+    {
+        @trigger_error('Support for stacking errors is deprecated since Symfony 3.4 and will be removed in 4.0.', \E_USER_DEPRECATED);
+
+        self::$stackedErrorLevels[] = error_reporting(error_reporting() | \E_PARSE | \E_ERROR | \E_CORE_ERROR | \E_COMPILE_ERROR);
+    }
+
+    /**
+     * Unstacks stacked errors and forwards to the logger.
+     *
+     * @deprecated since version 3.4, to be removed in 4.0.
+     */
+    public static function unstackErrors()
+    {
+        @trigger_error('Support for unstacking errors is deprecated since Symfony 3.4 and will be removed in 4.0.', \E_USER_DEPRECATED);
+
+        $level = array_pop(self::$stackedErrorLevels);
+
+        if (null !== $level) {
+            $errorReportingLevel = error_reporting($level);
+            if ($errorReportingLevel !== ($level | \E_PARSE | \E_ERROR | \E_CORE_ERROR | \E_COMPILE_ERROR)) {
+                // If the user changed the error level, do not overwrite it
+                error_reporting($errorReportingLevel);
+            }
+        }
+
+        if (empty(self::$stackedErrorLevels)) {
+            $errors = self::$stackedErrors;
+            self::$stackedErrors = [];
+
+            foreach ($errors as $error) {
+                $error[0]->log($error[1], $error[2], $error[3]);
+            }
+        }
+    }
+
    /**
     * Gets the fatal error handlers.
     *
@@ -688,10 +766,7 @@ class ErrorHandler
        ];
    }

-    /**
-     * Cleans the trace by removing function arguments and the frames added by the error handler and DebugClassLoader.
-     */
-    private function cleanTrace(array $backtrace, int $type, string $file, int $line, bool $throw): array
+    private function cleanTrace($backtrace, $type, $file, $line, $throw)
    {
        $lightTrace = $backtrace;

@@ -701,13 +776,6 @@ class ErrorHandler
                break;
            }
        }
-        if (class_exists(DebugClassLoader::class, false)) {
-            for ($i = \count($lightTrace) - 2; 0 < $i; --$i) {
-                if (DebugClassLoader::class === ($lightTrace[$i]['class'] ?? null)) {
-                    array_splice($lightTrace, --$i, 2);
-                }
-            }
-        }
        if (!($throw || $this->scopedErrors & $type)) {
            for ($i = 0; isset($lightTrace[$i]); ++$i) {
                unset($lightTrace[$i]['args'], $lightTrace[$i]['object']);
--- a/Exception/ClassNotFoundException.php
+++ b/Exception/ClassNotFoundException.php
@@ -11,18 +11,14 @@

 namespace Symfony\Component\Debug\Exception;

-@trigger_error(sprintf('The "%s" class is deprecated since Symfony 4.4, use "%s" instead.', ClassNotFoundException::class, \Symfony\Component\ErrorHandler\Error\ClassNotFoundError::class), E_USER_DEPRECATED);
-
 /**
 * Class (or Trait or Interface) Not Found Exception.
 *
 * @author Konstanton Myakshin <koc-dp@yandex.ru>
- *
- * @deprecated since Symfony 4.4, use Symfony\Component\ErrorHandler\Error\ClassNotFoundError instead.
 */
 class ClassNotFoundException extends FatalErrorException
 {
-    public function __construct(string $message, \ErrorException $previous)
+    public function __construct($message, \ErrorException $previous)
    {
        parent::__construct(
            $message,
--- a/Exception/ContextErrorException.php
+++ b/Exception/ContextErrorException.php
@@ -0,0 +1,40 @@
+<?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;
+
+/**
+ * Error Exception with Variable Context.
+ *
+ * @author Christian Sciberras <uuf6429@gmail.com>
+ *
+ * @deprecated since version 3.3. Instead, \ErrorException will be used directly in 4.0.
+ */
+class ContextErrorException extends \ErrorException
+{
+    private $context = [];
+
+    public function __construct($message, $code, $severity, $filename, $lineno, $context = [])
+    {
+        parent::__construct($message, $code, $severity, $filename, $lineno);
+        $this->context = $context;
+    }
+
+    /**
+     * @return array Array of variables that existed when the exception occurred
+     */
+    public function getContext()
+    {
+        @trigger_error(sprintf('The %s class is deprecated since Symfony 3.3 and will be removed in 4.0.', __CLASS__), \E_USER_DEPRECATED);
+
+        return $this->context;
+    }
+}
--- a/Exception/FatalErrorException.php
+++ b/Exception/FatalErrorException.php
@@ -11,18 +11,14 @@

 namespace Symfony\Component\Debug\Exception;

-@trigger_error(sprintf('The "%s" class is deprecated since Symfony 4.4, use "%s" instead.', FatalErrorException::class, \Symfony\Component\ErrorHandler\Error\FatalError::class), E_USER_DEPRECATED);
-
 /**
 * Fatal Error Exception.
 *
 * @author Konstanton Myakshin <koc-dp@yandex.ru>
- *
- * @deprecated since Symfony 4.4, use Symfony\Component\ErrorHandler\Error\FatalError instead.
 */
 class FatalErrorException extends \ErrorException
 {
-    public function __construct(string $message, int $code, int $severity, string $filename, int $lineno, int $traceOffset = null, bool $traceArgs = true, array $trace = null, \Throwable $previous = null)
+    public function __construct($message, $code, $severity, $filename, $lineno, $traceOffset = null, $traceArgs = true, array $trace = null, $previous = null)
    {
        parent::__construct($message, $code, $severity, $filename, $lineno, $previous);

@@ -64,6 +60,11 @@ class FatalErrorException extends \ErrorException

                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 = [];
            }
--- a/Exception/FatalThrowableError.php
+++ b/Exception/FatalThrowableError.php
@@ -11,33 +11,28 @@

 namespace Symfony\Component\Debug\Exception;

-@trigger_error(sprintf('The "%s" class is deprecated since Symfony 4.4.', FatalThrowableError::class), E_USER_DEPRECATED);
-
 /**
 * Fatal Throwable Error.
 *
 * @author Nicolas Grekas <p@tchwork.com>
- *
- * @deprecated since Symfony 4.4
 */
 class FatalThrowableError extends FatalErrorException
 {
-    private $originalClassName;
-
    public function __construct(\Throwable $e)
    {
-        $this->originalClassName = \get_class($e);
-
        if ($e instanceof \ParseError) {
-            $severity = E_PARSE;
+            $message = 'Parse error: '.$e->getMessage();
+            $severity = \E_PARSE;
        } elseif ($e instanceof \TypeError) {
-            $severity = E_RECOVERABLE_ERROR;
+            $message = 'Type error: '.$e->getMessage();
+            $severity = \E_RECOVERABLE_ERROR;
        } else {
-            $severity = E_ERROR;
+            $message = $e->getMessage();
+            $severity = \E_ERROR;
        }

        \ErrorException::__construct(
-            $e->getMessage(),
+            $message,
            $e->getCode(),
            $severity,
            $e->getFile(),
@@ -47,9 +42,4 @@ class FatalThrowableError extends FatalErrorException

        $this->setTrace($e->getTrace());
    }
-
-    public function getOriginalClassName(): string
-    {
-        return $this->originalClassName;
-    }
 }
--- a/Exception/FlattenException.php
+++ b/Exception/FlattenException.php
@@ -15,13 +15,11 @@ use Symfony\Component\HttpFoundation\Exception\RequestExceptionInterface;
 use Symfony\Component\HttpKernel\Exception\HttpExceptionInterface;

 /**
- * FlattenException wraps a PHP Error or Exception to be able to serialize it.
+ * FlattenException wraps a PHP Exception to be able to serialize it.
 *
 * Basically, this class removes all objects from the trace.
 *
 * @author Fabien Potencier <fabien@symfony.com>
- *
- * @deprecated since Symfony 4.4, use Symfony\Component\ErrorHandler\Exception\FlattenException instead.
 */
 class FlattenException
 {
@@ -29,25 +27,13 @@ class FlattenException
    private $code;
    private $previous;
    private $trace;
-    private $traceAsString;
    private $class;
    private $statusCode;
    private $headers;
    private $file;
    private $line;

-    /**
-     * @return static
-     */
    public static function create(\Exception $exception, $statusCode = null, array $headers = [])
-    {
-        return static::createFromThrowable($exception, $statusCode, $headers);
-    }
-
-    /**
-     * @return static
-     */
-    public static function createFromThrowable(\Throwable $exception, int $statusCode = null, array $headers = [])
    {
        $e = new static();
        $e->setMessage($exception->getMessage());
@@ -66,15 +52,17 @@ class FlattenException

        $e->setStatusCode($statusCode);
        $e->setHeaders($headers);
-        $e->setTraceFromThrowable($exception);
-        $e->setClass($exception instanceof FatalThrowableError ? $exception->getOriginalClassName() : \get_class($exception));
+        $e->setTraceFromException($exception);
+        $e->setClass(\get_class($exception));
        $e->setFile($exception->getFile());
        $e->setLine($exception->getLine());

        $previous = $exception->getPrevious();

-        if ($previous instanceof \Throwable) {
-            $e->setPrevious(static::createFromThrowable($previous));
+        if ($previous instanceof \Exception) {
+            $e->setPrevious(static::create($previous));
+        } elseif ($previous instanceof \Throwable) {
+            $e->setPrevious(static::create(new FatalThrowableError($previous)));
        }

        return $e;
@@ -99,14 +87,9 @@ class FlattenException
        return $this->statusCode;
    }

-    /**
-     * @return $this
-     */
    public function setStatusCode($code)
    {
        $this->statusCode = $code;
-
-        return $this;
    }

    public function getHeaders()
@@ -114,14 +97,9 @@ class FlattenException
        return $this->headers;
    }

-    /**
-     * @return $this
-     */
    public function setHeaders(array $headers)
    {
        $this->headers = $headers;
-
-        return $this;
    }

    public function getClass()
@@ -129,14 +107,9 @@ class FlattenException
        return $this->class;
    }

-    /**
-     * @return $this
-     */
    public function setClass($class)
    {
-        $this->class = 'c' === $class[0] && 0 === strpos($class, "class@anonymous\0") ? get_parent_class($class).'@anonymous' : $class;
-
-        return $this;
+        $this->class = $class;
    }

    public function getFile()
@@ -144,14 +117,9 @@ class FlattenException
        return $this->file;
    }

-    /**
-     * @return $this
-     */
    public function setFile($file)
    {
        $this->file = $file;
-
-        return $this;
    }

    public function getLine()
@@ -159,14 +127,9 @@ class FlattenException
        return $this->line;
    }

-    /**
-     * @return $this
-     */
    public function setLine($line)
    {
        $this->line = $line;
-
-        return $this;
    }

    public function getMessage()
@@ -174,20 +137,9 @@ class FlattenException
        return $this->message;
    }

-    /**
-     * @return $this
-     */
    public function setMessage($message)
    {
-        if (false !== strpos($message, "class@anonymous\0")) {
-            $message = preg_replace_callback('/class@anonymous\x00.*?\.php0x?[0-9a-fA-F]++/', function ($m) {
-                return class_exists($m[0], false) ? get_parent_class($m[0]).'@anonymous' : $m[0];
-            }, $message);
-        }
-
        $this->message = $message;
-
-        return $this;
    }

    public function getCode()
@@ -195,14 +147,9 @@ class FlattenException
        return $this->code;
    }

-    /**
-     * @return $this
-     */
    public function setCode($code)
    {
        $this->code = $code;
-
-        return $this;
    }

    public function getPrevious()
@@ -210,14 +157,9 @@ class FlattenException
        return $this->previous;
    }

-    /**
-     * @return $this
-     */
    public function setPrevious(self $previous)
    {
        $this->previous = $previous;
-
-        return $this;
    }

    public function getAllPrevious()
@@ -236,26 +178,11 @@ class FlattenException
        return $this->trace;
    }

-    /**
-     * @deprecated since 4.1, use {@see setTraceFromThrowable()} instead.
-     */
    public function setTraceFromException(\Exception $exception)
    {
-        @trigger_error(sprintf('The "%s()" method is deprecated since Symfony 4.1, use "setTraceFromThrowable()" instead.', __METHOD__), E_USER_DEPRECATED);
-
-        $this->setTraceFromThrowable($exception);
+        $this->setTrace($exception->getTrace(), $exception->getFile(), $exception->getLine());
    }

-    public function setTraceFromThrowable(\Throwable $throwable)
-    {
-        $this->traceAsString = $throwable->getTraceAsString();
-
-        return $this->setTrace($throwable->getTrace(), $throwable->getFile(), $throwable->getLine());
-    }
-
-    /**
-     * @return $this
-     */
    public function setTrace($trace, $file, $line)
    {
        $this->trace = [];
@@ -289,11 +216,9 @@ class FlattenException
                'args' => isset($entry['args']) ? $this->flattenArgs($entry['args']) : [],
            ];
        }
-
-        return $this;
    }

-    private function flattenArgs(array $args, int $level = 0, int &$count = 0): array
+    private function flattenArgs($args, $level = 0, &$count = 0)
    {
        $result = [];
        foreach ($args as $key => $value) {
@@ -329,39 +254,10 @@ class FlattenException
        return $result;
    }

-    private function getClassNameFromIncomplete(\__PHP_Incomplete_Class $value): string
+    private function getClassNameFromIncomplete(\__PHP_Incomplete_Class $value)
    {
        $array = new \ArrayObject($value);

        return $array['__PHP_Incomplete_Class_Name'];
    }
-
-    public function getTraceAsString()
-    {
-        return $this->traceAsString;
-    }
-
-    public function getAsString()
-    {
-        $message = '';
-        $next = false;
-
-        foreach (array_reverse(array_merge([$this], $this->getAllPrevious())) as $exception) {
-            if ($next) {
-                $message .= 'Next ';
-            } else {
-                $next = true;
-            }
-            $message .= $exception->getClass();
-
-            if ('' != $exception->getMessage()) {
-                $message .= ': '.$exception->getMessage();
-            }
-
-            $message .= ' in '.$exception->getFile().':'.$exception->getLine().
-                "\nStack trace:\n".$exception->getTraceAsString()."\n\n";
-        }
-
-        return rtrim($message);
-    }
 }
--- a/Exception/OutOfMemoryException.php
+++ b/Exception/OutOfMemoryException.php
@@ -11,14 +11,10 @@

 namespace Symfony\Component\Debug\Exception;

-@trigger_error(sprintf('The "%s" class is deprecated since Symfony 4.4, use "%s" instead.', OutOfMemoryException::class, \Symfony\Component\ErrorHandler\Error\OutOfMemoryError::class), E_USER_DEPRECATED);
-
 /**
 * Out of memory exception.
 *
 * @author Nicolas Grekas <p@tchwork.com>
- *
- * @deprecated since Symfony 4.4, use Symfony\Component\ErrorHandler\Error\OutOfMemoryError instead.
 */
 class OutOfMemoryException extends FatalErrorException
 {
--- a/Exception/SilencedErrorContext.php
+++ b/Exception/SilencedErrorContext.php
@@ -11,14 +11,10 @@

 namespace Symfony\Component\Debug\Exception;

-@trigger_error(sprintf('The "%s" class is deprecated since Symfony 4.4, use "%s" instead.', SilencedErrorContext::class, \Symfony\Component\ErrorHandler\Exception\SilencedErrorContext::class), E_USER_DEPRECATED);
-
 /**
 * Data Object that represents a Silenced Error.
 *
 * @author Grégoire Pineau <lyrixx@lyrixx.info>
- *
- * @deprecated since Symfony 4.4, use Symfony\Component\ErrorHandler\Exception\SilencedErrorContext instead.
 */
 class SilencedErrorContext implements \JsonSerializable
 {
@@ -29,7 +25,7 @@ class SilencedErrorContext implements \JsonSerializable
    private $line;
    private $trace;

-    public function __construct(int $severity, string $file, int $line, array $trace = [], int $count = 1)
+    public function __construct($severity, $file, $line, array $trace = [], $count = 1)
    {
        $this->severity = $severity;
        $this->file = $file;
--- a/Exception/UndefinedFunctionException.php
+++ b/Exception/UndefinedFunctionException.php
@@ -11,18 +11,14 @@

 namespace Symfony\Component\Debug\Exception;

-@trigger_error(sprintf('The "%s" class is deprecated since Symfony 4.4, use "%s" instead.', UndefinedFunctionException::class, \Symfony\Component\ErrorHandler\Error\UndefinedFunctionError::class), E_USER_DEPRECATED);
-
 /**
 * Undefined Function Exception.
 *
 * @author Konstanton Myakshin <koc-dp@yandex.ru>
- *
- * @deprecated since Symfony 4.4, use Symfony\Component\ErrorHandler\Error\UndefinedFunctionError instead.
 */
 class UndefinedFunctionException extends FatalErrorException
 {
-    public function __construct(string $message, \ErrorException $previous)
+    public function __construct($message, \ErrorException $previous)
    {
        parent::__construct(
            $message,
--- a/Exception/UndefinedMethodException.php
+++ b/Exception/UndefinedMethodException.php
@@ -11,18 +11,14 @@

 namespace Symfony\Component\Debug\Exception;

-@trigger_error(sprintf('The "%s" class is deprecated since Symfony 4.4, use "%s" instead.', UndefinedMethodException::class, \Symfony\Component\ErrorHandler\Error\UndefinedMethodError::class), E_USER_DEPRECATED);
-
 /**
 * Undefined Method Exception.
 *
 * @author Grégoire Pineau <lyrixx@lyrixx.info>
- *
- * @deprecated since Symfony 4.4, use Symfony\Component\ErrorHandler\Error\UndefinedMethodError instead.
 */
 class UndefinedMethodException extends FatalErrorException
 {
-    public function __construct(string $message, \ErrorException $previous)
+    public function __construct($message, \ErrorException $previous)
    {
        parent::__construct(
            $message,
--- a/ExceptionHandler.php
+++ b/ExceptionHandler.php
--- a/FatalErrorHandler/ClassNotFoundFatalErrorHandler.php
+++ b/FatalErrorHandler/ClassNotFoundFatalErrorHandler.php
@@ -17,14 +17,10 @@ use Symfony\Component\Debug\DebugClassLoader;
 use Symfony\Component\Debug\Exception\ClassNotFoundException;
 use Symfony\Component\Debug\Exception\FatalErrorException;

-@trigger_error(sprintf('The "%s" class is deprecated since Symfony 4.4, use "%s" instead.', ClassNotFoundFatalErrorHandler::class, \Symfony\Component\ErrorHandler\FatalErrorHandler\ClassNotFoundFatalErrorHandler::class), E_USER_DEPRECATED);
-
 /**
 * ErrorHandler for classes that do not exist.
 *
 * @author Fabien Potencier <fabien@symfony.com>
- *
- * @deprecated since Symfony 4.4, use Symfony\Component\ErrorHandler\FatalErrorHandler\ClassNotFoundFatalErrorHandler instead.
 */
 class ClassNotFoundFatalErrorHandler implements FatalErrorHandlerInterface
 {
@@ -33,50 +29,34 @@ class ClassNotFoundFatalErrorHandler implements FatalErrorHandlerInterface
     */
    public function handleError(array $error, FatalErrorException $exception)
    {
-        $messageLen = \strlen($error['message']);
-        $notFoundSuffix = '\' not found';
-        $notFoundSuffixLen = \strlen($notFoundSuffix);
-        if ($notFoundSuffixLen > $messageLen) {
+        if (!preg_match('/^(Class|Interface|Trait) [\'"]([^\'"]+)[\'"] not found$/', $error['message'], $matches)) {
            return null;
        }
+        $typeName = strtolower($matches[1]);
+        $fullyQualifiedClassName = $matches[2];

-        if (0 !== substr_compare($error['message'], $notFoundSuffix, -$notFoundSuffixLen)) {
-            return null;
+        if (false !== $namespaceSeparatorIndex = strrpos($fullyQualifiedClassName, '\\')) {
+            $className = substr($fullyQualifiedClassName, $namespaceSeparatorIndex + 1);
+            $namespacePrefix = substr($fullyQualifiedClassName, 0, $namespaceSeparatorIndex);
+            $message = sprintf('Attempted to load %s "%s" from namespace "%s".', $typeName, $className, $namespacePrefix);
+            $tail = ' for another namespace?';
+        } else {
+            $className = $fullyQualifiedClassName;
+            $message = sprintf('Attempted to load %s "%s" from the global namespace.', $typeName, $className);
+            $tail = '?';
        }

-        foreach (['class', 'interface', 'trait'] as $typeName) {
-            $prefix = ucfirst($typeName).' \'';
-            $prefixLen = \strlen($prefix);
-            if (0 !== strpos($error['message'], $prefix)) {
-                continue;
-            }
-
-            $fullyQualifiedClassName = substr($error['message'], $prefixLen, -$notFoundSuffixLen);
-            if (false !== $namespaceSeparatorIndex = strrpos($fullyQualifiedClassName, '\\')) {
-                $className = substr($fullyQualifiedClassName, $namespaceSeparatorIndex + 1);
-                $namespacePrefix = substr($fullyQualifiedClassName, 0, $namespaceSeparatorIndex);
-                $message = sprintf('Attempted to load %s "%s" from namespace "%s".', $typeName, $className, $namespacePrefix);
-                $tail = ' for another namespace?';
+        if ($candidates = $this->getClassCandidates($className)) {
+            $tail = array_pop($candidates).'"?';
+            if ($candidates) {
+                $tail = ' for e.g. "'.implode('", "', $candidates).'" or "'.$tail;
            } else {
-                $className = $fullyQualifiedClassName;
-                $message = sprintf('Attempted to load %s "%s" from the global namespace.', $typeName, $className);
-                $tail = '?';
+                $tail = ' for "'.$tail;
            }
-
-            if ($candidates = $this->getClassCandidates($className)) {
-                $tail = array_pop($candidates).'"?';
-                if ($candidates) {
-                    $tail = ' for e.g. "'.implode('", "', $candidates).'" or "'.$tail;
-                } else {
-                    $tail = ' for "'.$tail;
-                }
-            }
-            $message .= "\nDid you forget a \"use\" statement".$tail;
-
-            return new ClassNotFoundException($message, $exception);
        }
+        $message .= "\nDid you forget a \"use\" statement".$tail;

-        return null;
+        return new ClassNotFoundException($message, $exception);
    }

    /**
@@ -89,7 +69,7 @@ class ClassNotFoundFatalErrorHandler implements FatalErrorHandlerInterface
     *
     * @return array An array of possible fully qualified class names
     */
-    private function getClassCandidates(string $class): array
+    private function getClassCandidates($class)
    {
        if (!\is_array($functions = spl_autoload_functions())) {
            return [];
@@ -130,7 +110,14 @@ class ClassNotFoundFatalErrorHandler implements FatalErrorHandlerInterface
        return array_unique($classes);
    }

-    private function findClassInPath(string $path, string $class, string $prefix): array
+    /**
+     * @param string $path
+     * @param string $class
+     * @param string $prefix
+     *
+     * @return array
+     */
+    private function findClassInPath($path, $class, $prefix)
    {
        if (!$path = realpath($path.'/'.strtr($prefix, '\\_', '//')) ?: realpath($path.'/'.\dirname(strtr($prefix, '\\_', '//'))) ?: realpath($path)) {
            return [];
@@ -147,7 +134,14 @@ class ClassNotFoundFatalErrorHandler implements FatalErrorHandlerInterface
        return $classes;
    }

-    private function convertFileToClass(string $path, string $file, string $prefix): ?string
+    /**
+     * @param string $path
+     * @param string $file
+     * @param string $prefix
+     *
+     * @return string|null
+     */
+    private function convertFileToClass($path, $file, $prefix)
    {
        $candidates = [
            // namespaced class
@@ -192,7 +186,12 @@ class ClassNotFoundFatalErrorHandler implements FatalErrorHandlerInterface
        return null;
    }

-    private function classExists(string $class): bool
+    /**
+     * @param string $class
+     *
+     * @return bool
+     */
+    private function classExists($class)
    {
        return class_exists($class, false) || interface_exists($class, false) || trait_exists($class, false);
    }
--- a/FatalErrorHandler/FatalErrorHandlerInterface.php
+++ b/FatalErrorHandler/FatalErrorHandlerInterface.php
@@ -13,21 +13,18 @@ namespace Symfony\Component\Debug\FatalErrorHandler;

 use Symfony\Component\Debug\Exception\FatalErrorException;

-@trigger_error(sprintf('The "%s" class is deprecated since Symfony 4.4, use "%s" instead.', FatalErrorHandlerInterface::class, \Symfony\Component\ErrorHandler\FatalErrorHandler\FatalErrorHandlerInterface::class), E_USER_DEPRECATED);
-
 /**
 * Attempts to convert fatal errors to exceptions.
 *
 * @author Fabien Potencier <fabien@symfony.com>
- *
- * @deprecated since Symfony 4.4, use Symfony\Component\ErrorHandler\FatalErrorHandler\FatalErrorHandlerInterface instead.
 */
 interface FatalErrorHandlerInterface
 {
    /**
     * Attempts to convert an error into an exception.
     *
-     * @param array $error An array as returned by error_get_last()
+     * @param array               $error     An array as returned by error_get_last()
+     * @param FatalErrorException $exception A FatalErrorException instance
     *
     * @return FatalErrorException|null A FatalErrorException instance if the class is able to convert the error, null otherwise
     */
--- a/FatalErrorHandler/UndefinedFunctionFatalErrorHandler.php
+++ b/FatalErrorHandler/UndefinedFunctionFatalErrorHandler.php
@@ -14,14 +14,10 @@ namespace Symfony\Component\Debug\FatalErrorHandler;
 use Symfony\Component\Debug\Exception\FatalErrorException;
 use Symfony\Component\Debug\Exception\UndefinedFunctionException;

-@trigger_error(sprintf('The "%s" class is deprecated since Symfony 4.4, use "%s" instead.', UndefinedFunctionFatalErrorHandler::class, \Symfony\Component\ErrorHandler\ErrorEnhancer\UndefinedFunctionErrorEnhancer::class), E_USER_DEPRECATED);
-
 /**
 * ErrorHandler for undefined functions.
 *
 * @author Fabien Potencier <fabien@symfony.com>
- *
- * @deprecated since Symfony 4.4, use Symfony\Component\ErrorHandler\ErrorEnhancer\UndefinedFunctionErrorEnhancer instead.
 */
 class UndefinedFunctionFatalErrorHandler implements FatalErrorHandlerInterface
 {
--- a/FatalErrorHandler/UndefinedMethodFatalErrorHandler.php
+++ b/FatalErrorHandler/UndefinedMethodFatalErrorHandler.php
@@ -14,14 +14,10 @@ namespace Symfony\Component\Debug\FatalErrorHandler;
 use Symfony\Component\Debug\Exception\FatalErrorException;
 use Symfony\Component\Debug\Exception\UndefinedMethodException;

-@trigger_error(sprintf('The "%s" class is deprecated since Symfony 4.4, use "%s" instead.', UndefinedMethodFatalErrorHandler::class, \Symfony\Component\ErrorHandler\ErrorEnhancer\UndefinedMethodErrorEnhancer::class), E_USER_DEPRECATED);
-
 /**
 * ErrorHandler for undefined methods.
 *
 * @author Grégoire Pineau <lyrixx@lyrixx.info>
- *
- * @deprecated since Symfony 4.4, use Symfony\Component\ErrorHandler\ErrorEnhancer\UndefinedMethodErrorEnhancer instead.
 */
 class UndefinedMethodFatalErrorHandler implements FatalErrorHandlerInterface
 {
--- a/2
+++ b/2
@@ -1,4 +1,4 @@
-Copyright (c) 2004-2019 Fabien Potencier
+Copyright (c) 2004-2020 Fabien Potencier

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
--- a/README.md
+++ b/README.md
@@ -3,10 +3,22 @@ Debug Component

 The Debug component provides tools to ease debugging PHP code.

+Getting Started
+---------------
+
+```
+$ composer install symfony/debug
+```
+
+```php
+use Symfony\Component\Debug\Debug;
+
+Debug::enable();
+```
+
 Resources
 ---------

-  * [Documentation](https://symfony.com/doc/current/components/debug/index.html)
  * [Contributing](https://symfony.com/doc/current/contributing/index.html)
  * [Report issues](https://github.com/symfony/symfony/issues) and
    [send Pull Requests](https://github.com/symfony/symfony/pulls)
--- a/Resources/ext/README.md
+++ b/Resources/ext/README.md
@@ -0,0 +1,134 @@
+Symfony Debug Extension for PHP 5
+=================================
+
+This extension publishes several functions to help building powerful debugging tools.
+It is compatible with PHP 5.3, 5.4, 5.5 and 5.6; with ZTS and non-ZTS modes.
+It is not required thus not provided for PHP 7.
+
+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;
+    }
+
+    $info = [
+        'type' => gettype($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':
+            $info += [
+                'object_class' => get_class($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 += [
+                'resource_handle' => (int) $array[$key],
+                'resource_type' => get_resource_type($array[$key]),
+                'resource_refcount' => /* internal resource refcount of $array[$key] */,
+            ];
+            break;
+
+        case 'array':
+            $info += [
+                'array_count' => count($array[$key]),
+            ];
+            break;
+
+        case 'string':
+            $info += [
+                'strlen' => strlen($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
+-----
+
+To enable the extension from source, run:
+
+```
+    phpize
+    ./configure
+    make
+    sudo make install
+```
--- a/Resources/ext/config.m4
+++ b/Resources/ext/config.m4
@@ -0,0 +1,63 @@
+dnl $Id$
+dnl config.m4 for extension symfony_debug
+
+dnl Comments in this file start with the string 'dnl'.
+dnl Remove where necessary. This file will not work
+dnl without editing.
+
+dnl If your extension references something external, use with:
+
+dnl PHP_ARG_WITH(symfony_debug, for symfony_debug support,
+dnl Make sure that the comment is aligned:
+dnl [  --with-symfony_debug             Include symfony_debug support])
+
+dnl Otherwise use enable:
+
+PHP_ARG_ENABLE(symfony_debug, whether to enable symfony_debug support,
+dnl Make sure that the comment is aligned:
+[  --enable-symfony_debug           Enable symfony_debug support])
+
+if test "$PHP_SYMFONY_DEBUG" != "no"; then
+  dnl Write more examples of tests here...
+
+  dnl # --with-symfony_debug -> check with-path
+  dnl SEARCH_PATH="/usr/local /usr"     # you might want to change this
+  dnl SEARCH_FOR="/include/symfony_debug.h"  # you most likely want to change this
+  dnl if test -r $PHP_SYMFONY_DEBUG/$SEARCH_FOR; then # path given as parameter
+  dnl   SYMFONY_DEBUG_DIR=$PHP_SYMFONY_DEBUG
+  dnl else # search default path list
+  dnl   AC_MSG_CHECKING([for symfony_debug files in default path])
+  dnl   for i in $SEARCH_PATH ; do
+  dnl     if test -r $i/$SEARCH_FOR; then
+  dnl       SYMFONY_DEBUG_DIR=$i
+  dnl       AC_MSG_RESULT(found in $i)
+  dnl     fi
+  dnl   done
+  dnl fi
+  dnl
+  dnl if test -z "$SYMFONY_DEBUG_DIR"; then
+  dnl   AC_MSG_RESULT([not found])
+  dnl   AC_MSG_ERROR([Please reinstall the symfony_debug distribution])
+  dnl fi
+
+  dnl # --with-symfony_debug -> add include path
+  dnl PHP_ADD_INCLUDE($SYMFONY_DEBUG_DIR/include)
+
+  dnl # --with-symfony_debug -> check for lib and symbol presence
+  dnl LIBNAME=symfony_debug # you may want to change this
+  dnl LIBSYMBOL=symfony_debug # you most likely want to change this 
+
+  dnl PHP_CHECK_LIBRARY($LIBNAME,$LIBSYMBOL,
+  dnl [
+  dnl   PHP_ADD_LIBRARY_WITH_PATH($LIBNAME, $SYMFONY_DEBUG_DIR/lib, SYMFONY_DEBUG_SHARED_LIBADD)
+  dnl   AC_DEFINE(HAVE_SYMFONY_DEBUGLIB,1,[ ])
+  dnl ],[
+  dnl   AC_MSG_ERROR([wrong symfony_debug lib version or lib not found])
+  dnl ],[
+  dnl   -L$SYMFONY_DEBUG_DIR/lib -lm
+  dnl ])
+  dnl
+  dnl PHP_SUBST(SYMFONY_DEBUG_SHARED_LIBADD)
+
+  PHP_NEW_EXTENSION(symfony_debug, symfony_debug.c, $ext_shared)
+fi
--- a/Resources/ext/config.w32
+++ b/Resources/ext/config.w32
@@ -0,0 +1,13 @@
+// $Id$
+// vim:ft=javascript
+
+// If your extension references something external, use ARG_WITH
+// ARG_WITH("symfony_debug", "for symfony_debug support", "no");
+
+// Otherwise, use ARG_ENABLE
+// ARG_ENABLE("symfony_debug", "enable symfony_debug support", "no");
+
+if (PHP_SYMFONY_DEBUG != "no") {
+	EXTENSION("symfony_debug", "symfony_debug.c");
+}
+
--- a/Resources/ext/php_symfony_debug.h
+++ b/Resources/ext/php_symfony_debug.h
@@ -0,0 +1,60 @@
+/*
+ * 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.
+ */
+
+#ifndef PHP_SYMFONY_DEBUG_H
+#define PHP_SYMFONY_DEBUG_H
+
+extern zend_module_entry symfony_debug_module_entry;
+#define phpext_symfony_debug_ptr &symfony_debug_module_entry
+
+#define PHP_SYMFONY_DEBUG_VERSION "2.7"
+
+#ifdef PHP_WIN32
+#	define PHP_SYMFONY_DEBUG_API __declspec(dllexport)
+#elif defined(__GNUC__) && __GNUC__ >= 4
+#	define PHP_SYMFONY_DEBUG_API __attribute__ ((visibility("default")))
+#else
+#	define PHP_SYMFONY_DEBUG_API
+#endif
+
+#ifdef ZTS
+#include "TSRM.h"
+#endif
+
+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);
+PHP_MSHUTDOWN_FUNCTION(symfony_debug);
+PHP_RINIT_FUNCTION(symfony_debug);
+PHP_RSHUTDOWN_FUNCTION(symfony_debug);
+PHP_MINFO_FUNCTION(symfony_debug);
+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 * TSRMLS_DC);
+static const char *_symfony_debug_zval_type(zval *);
+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)
+#else
+#define SYMFONY_DEBUG_G(v) (symfony_debug_globals.v)
+#endif
+
+#endif	/* PHP_SYMFONY_DEBUG_H */
--- a/Resources/ext/symfony_debug.c
+++ b/Resources/ext/symfony_debug.c
@@ -0,0 +1,283 @@
+/*
+ * 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "php.h"
+#ifdef ZTS
+#include "TSRM.h"
+#endif
+#include "php_ini.h"
+#include "ext/standard/info.h"
+#include "php_symfony_debug.h"
+#include "ext/standard/php_rand.h"
+#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)
+
+ZEND_BEGIN_ARG_INFO_EX(symfony_zval_arginfo, 0, 0, 2)
+	ZEND_ARG_INFO(0, key)
+	ZEND_ARG_ARRAY_INFO(0, array, 0)
+	ZEND_ARG_INFO(0, options)
+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;
+	zval **data = NULL;
+	HashTable *array = NULL;
+	long options = 0;
+
+	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "zh|l", &key, &array, &options) == FAILURE) {
+		return;
+	}
+
+	switch (Z_TYPE_P(key)) {
+		case IS_STRING:
+			if (zend_symtable_find(array, Z_STRVAL_P(key), Z_STRLEN_P(key) + 1, (void **)&data) == FAILURE) {
+				return;
+			}
+		break;
+		case IS_LONG:
+			if (zend_hash_index_find(array, Z_LVAL_P(key), (void **)&data)) {
+				return;
+			}
+		break;
+	}
+
+	arg = *data;
+
+	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 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) {
+		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);
+		add_assoc_long(return_value, "object_handle", Z_OBJ_HANDLE_P(arg));
+	} else if (Z_TYPE_P(arg) == IS_ARRAY) {
+		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) 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));
+	}
+}
+
+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 TSRMLS_CC);
+
+	if (!res_type) {
+		return "Unknown";
+	}
+
+	return res_type;
+}
+
+static int _symfony_debug_get_resource_refcount(long rsid TSRMLS_DC)
+{
+	zend_rsrc_list_entry *le;
+
+	if (zend_hash_index_find(&EG(regular_list), rsid, (void **) &le)==SUCCESS) {
+		return le->refcount;
+	}
+
+	return 0;
+}
+
+static char *_symfony_debug_memory_address_hash(void *address TSRMLS_DC)
+{
+	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(TSRMLS_C);
+	}
+
+	address_rand = (intptr_t)address ^ SYMFONY_DEBUG_G(req_rand_init);
+
+	spprintf(&result, 17, "%016zx", address_rand);
+
+	return result;
+}
+
+static const char *_symfony_debug_zval_type(zval *zv)
+{
+	switch (Z_TYPE_P(zv)) {
+		case IS_NULL:
+			return "NULL";
+			break;
+
+		case IS_BOOL:
+			return "boolean";
+			break;
+
+		case IS_LONG:
+			return "integer";
+			break;
+
+		case IS_DOUBLE:
+			return "double";
+			break;
+
+		case IS_STRING:
+			return "string";
+			break;
+
+		case IS_ARRAY:
+			return "array";
+			break;
+
+		case IS_OBJECT:
+			return "object";
+
+		case IS_RESOURCE:
+			return "resource";
+
+		default:
+			return "unknown type";
+	}
+}
+
+zend_module_entry symfony_debug_module_entry = {
+	STANDARD_MODULE_HEADER,
+	"symfony_debug",
+	symfony_debug_functions,
+	PHP_MINIT(symfony_debug),
+	PHP_MSHUTDOWN(symfony_debug),
+	PHP_RINIT(symfony_debug),
+	PHP_RSHUTDOWN(symfony_debug),
+	PHP_MINFO(symfony_debug),
+	PHP_SYMFONY_DEBUG_VERSION,
+	PHP_MODULE_GLOBALS(symfony_debug),
+	PHP_GINIT(symfony_debug),
+	PHP_GSHUTDOWN(symfony_debug),
+	NULL,
+	STANDARD_MODULE_PROPERTIES_EX
+};
+
+#ifdef COMPILE_DL_SYMFONY_DEBUG
+ZEND_GET_MODULE(symfony_debug)
+#endif
+
+PHP_GINIT_FUNCTION(symfony_debug)
+{
+	memset(symfony_debug_globals, 0 , sizeof(*symfony_debug_globals));
+}
+
+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;
+}
+
+PHP_RINIT_FUNCTION(symfony_debug)
+{
+	return SUCCESS;
+}
+
+PHP_RSHUTDOWN_FUNCTION(symfony_debug)
+{
+	return SUCCESS;
+}
+
+PHP_MINFO_FUNCTION(symfony_debug)
+{
+	php_info_print_table_start();
+	php_info_print_table_header(2, "Symfony Debug support", "enabled");
+	php_info_print_table_header(2, "Symfony Debug version", PHP_SYMFONY_DEBUG_VERSION);
+	php_info_print_table_end();
+}
--- a/Resources/ext/tests/001.phpt
+++ b/Resources/ext/tests/001.phpt
@@ -0,0 +1,155 @@
+--TEST--
+Test symfony_zval_info API
+--SKIPIF--
+<?php if (!extension_loaded('symfony_debug')) {
+    echo 'skip';
+} ?>
+--FILE--
+<?php
+
+$int = 42;
+$float = 42.42;
+$str = 'foobar';
+$object = new StdClass();
+$array = ['foo', 'bar'];
+$resource = tmpfile();
+$null = null;
+$bool = true;
+
+$anotherint = 42;
+$refcount2 = &$anotherint;
+
+$var = [
+    'int' => $int,
+    'float' => $float,
+    'str' => $str,
+    'object' => $object,
+    'array' => $array,
+    'resource' => $resource,
+    'null' => $null,
+    'bool' => $bool,
+    'refcount' => &$refcount2,
+];
+
+var_dump(symfony_zval_info('int', $var));
+var_dump(symfony_zval_info('float', $var));
+var_dump(symfony_zval_info('str', $var));
+var_dump(symfony_zval_info('object', $var));
+var_dump(symfony_zval_info('array', $var));
+var_dump(symfony_zval_info('resource', $var));
+var_dump(symfony_zval_info('null', $var));
+var_dump(symfony_zval_info('bool', $var));
+
+var_dump(symfony_zval_info('refcount', $var));
+var_dump(symfony_zval_info('not-exist', $var));
+?>
+--EXPECTF--
+array(4) {
+  ["type"]=>
+  string(7) "integer"
+  ["zval_hash"]=>
+  string(16) "%s"
+  ["zval_refcount"]=>
+  int(2)
+  ["zval_isref"]=>
+  bool(false)
+}
+array(4) {
+  ["type"]=>
+  string(6) "double"
+  ["zval_hash"]=>
+  string(16) "%s"
+  ["zval_refcount"]=>
+  int(2)
+  ["zval_isref"]=>
+  bool(false)
+}
+array(5) {
+  ["type"]=>
+  string(6) "string"
+  ["zval_hash"]=>
+  string(16) "%s"
+  ["zval_refcount"]=>
+  int(2)
+  ["zval_isref"]=>
+  bool(false)
+  ["strlen"]=>
+  int(6)
+}
+array(8) {
+  ["type"]=>
+  string(6) "object"
+  ["zval_hash"]=>
+  string(16) "%s"
+  ["zval_refcount"]=>
+  int(2)
+  ["zval_isref"]=>
+  bool(false)
+  ["object_class"]=>
+  string(8) "stdClass"
+  ["object_refcount"]=>
+  int(1)
+  ["object_hash"]=>
+  string(32) "%s"
+  ["object_handle"]=>
+  int(%d)
+}
+array(5) {
+  ["type"]=>
+  string(5) "array"
+  ["zval_hash"]=>
+  string(16) "%s"
+  ["zval_refcount"]=>
+  int(2)
+  ["zval_isref"]=>
+  bool(false)
+  ["array_count"]=>
+  int(2)
+}
+array(7) {
+  ["type"]=>
+  string(8) "resource"
+  ["zval_hash"]=>
+  string(16) "%s"
+  ["zval_refcount"]=>
+  int(2)
+  ["zval_isref"]=>
+  bool(false)
+  ["resource_handle"]=>
+  int(%d)
+  ["resource_type"]=>
+  string(6) "stream"
+  ["resource_refcount"]=>
+  int(1)
+}
+array(4) {
+  ["type"]=>
+  string(4) "NULL"
+  ["zval_hash"]=>
+  string(16) "%s"
+  ["zval_refcount"]=>
+  int(2)
+  ["zval_isref"]=>
+  bool(false)
+}
+array(4) {
+  ["type"]=>
+  string(7) "boolean"
+  ["zval_hash"]=>
+  string(16) "%s"
+  ["zval_refcount"]=>
+  int(2)
+  ["zval_isref"]=>
+  bool(false)
+}
+array(4) {
+  ["type"]=>
+  string(7) "integer"
+  ["zval_hash"]=>
+  string(16) "%s"
+  ["zval_refcount"]=>
+  int(3)
+  ["zval_isref"]=>
+  bool(true)
+}
+NULL
--- a/Resources/ext/tests/002.phpt
+++ b/Resources/ext/tests/002.phpt
@@ -0,0 +1,65 @@
+--TEST--
+Test symfony_debug_backtrace in case of fatal error
+--SKIPIF--
+<?php if (!extension_loaded('symfony_debug')) {
+    echo '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 +1,48 @@
+--TEST--
+Test symfony_debug_backtrace in case of non fatal error
+--SKIPIF--
+<?php if (!extension_loaded('symfony_debug')) {
+    echo '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 +1,87 @@
+--TEST--
+Test ErrorHandler in case of fatal error
+--SKIPIF--
+<?php if (!extension_loaded('symfony_debug')) {
+    echo '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
@@ -13,10 +13,8 @@ namespace Symfony\Component\Debug\Tests;

 use PHPUnit\Framework\TestCase;
 use Symfony\Component\Debug\DebugClassLoader;
+use Symfony\Component\Debug\ErrorHandler;

-/**
- * @group legacy
- */
 class DebugClassLoaderTest extends TestCase
 {
    /**
@@ -26,26 +24,24 @@ class DebugClassLoaderTest extends TestCase

    private $loader;

-    protected function setUp(): void
+    protected function setUp()
    {
        $this->errorReporting = error_reporting(E_ALL);
-        $this->loader = [new DebugClassLoader([new ClassLoader(), 'loadClass']), 'loadClass'];
-        spl_autoload_register($this->loader, true, true);
+        $this->loader = new ClassLoader();
+        spl_autoload_register([$this->loader, 'loadClass'], true, true);
+        DebugClassLoader::enable();
    }

-    protected function tearDown(): void
+    protected function tearDown()
    {
-        spl_autoload_unregister($this->loader);
+        DebugClassLoader::disable();
+        spl_autoload_unregister([$this->loader, 'loadClass']);
        error_reporting($this->errorReporting);
    }

-    /**
-     * @runInSeparateProcess
-     */
    public function testIdempotence()
    {
        DebugClassLoader::enable();
-        DebugClassLoader::enable();

        $functions = spl_autoload_functions();
        foreach ($functions as $function) {
@@ -68,21 +64,87 @@ class DebugClassLoaderTest extends TestCase
        $this->expectException('Exception');
        $this->expectExceptionMessage('boo');
        try {
-            class_exists(__NAMESPACE__.'\Fixtures\Throwing');
+            class_exists(Fixtures\Throwing::class);
            $this->fail('Exception expected');
        } catch (\Exception $e) {
            $this->assertSame('boo', $e->getMessage());
        }

        // the second call also should throw
-        class_exists(__NAMESPACE__.'\Fixtures\Throwing');
+        class_exists(Fixtures\Throwing::class);
+    }
+
+    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);
+        $this->iniSet('display_errors', 1);
+
+        // See below: this will fail with parse error
+        // but this should not be @-silenced.
+        @class_exists(TestingUnsilencing::class, true);
+
+        $output = ob_get_clean();
+
+        $this->assertStringMatchesFormat('%aParse error%a', $output);
+    }
+
+    /**
+     * @requires PHP < 8.0
+     */
+    public function testStacking()
+    {
+        // the ContextErrorException must not be loaded to test the workaround
+        // for https://bugs.php.net/65322.
+        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();
+
+        try {
+            // Trigger autoloading + E_STRICT at compile time
+            // which in turn triggers $errorHandler->handle()
+            // that again triggers autoloading for ContextErrorException.
+            // Error stacking works around the bug above and everything is fine.
+
+            eval('
+                namespace '.__NAMESPACE__.';
+                class ChildTestingStacking extends TestingStacking { function foo($bar) {} }
+            ');
+            $this->fail('ContextErrorException expected');
+        } catch (\ErrorException $exception) {
+            // if an exception is thrown, the test passed
+            $this->assertStringStartsWith(__FILE__, $exception->getFile());
+            if (\PHP_VERSION_ID < 70000) {
+                $this->assertMatchesRegularExpression('/^Runtime Notice: Declaration/', $exception->getMessage());
+                $this->assertEquals(E_STRICT, $exception->getSeverity());
+            } else {
+                $this->assertMatchesRegularExpression('/^Warning: Declaration/', $exception->getMessage());
+                $this->assertEquals(E_WARNING, $exception->getSeverity());
+            }
+        } finally {
+            restore_error_handler();
+            restore_exception_handler();
+        }
    }

    public function testNameCaseMismatch()
    {
        $this->expectException('RuntimeException');
        $this->expectExceptionMessage('Case mismatch between loaded and declared class names');
-        class_exists(__NAMESPACE__.'\TestingCaseMismatch', true);
+        class_exists(TestingCaseMismatch::class, true);
    }

    public function testFileCaseMismatch()
@@ -93,7 +155,7 @@ class DebugClassLoaderTest extends TestCase
            $this->markTestSkipped('Can only be run on case insensitive filesystems');
        }

-        class_exists(__NAMESPACE__.'\Fixtures\CaseMismatch', true);
+        class_exists(Fixtures\CaseMismatch::class, true);
    }

    public function testPsr4CaseMismatch()
@@ -115,7 +177,7 @@ class DebugClassLoaderTest extends TestCase

    public function testClassAlias()
    {
-        $this->assertTrue(class_exists(__NAMESPACE__.'\Fixtures\ClassAlias', true));
+        $this->assertTrue(class_exists(Fixtures\ClassAlias::class, true));
    }

    /**
@@ -125,7 +187,7 @@ class DebugClassLoaderTest extends TestCase
    {
        set_error_handler(function () { return false; });
        $e = error_reporting(0);
-        trigger_error('', E_USER_DEPRECATED);
+        @trigger_error('', E_USER_DEPRECATED);

        class_exists('Test\\'.__NAMESPACE__.'\\'.$class, true);

@@ -157,7 +219,7 @@ class DebugClassLoaderTest extends TestCase
        $e = error_reporting(0);
        trigger_error('', E_USER_NOTICE);

-        class_exists('Test\\'.__NAMESPACE__.'\\NonDeprecatedInterfaceClass', true);
+        class_exists('Test\\'.NonDeprecatedInterfaceClass::class, true);

        error_reporting($e);
        restore_error_handler();
@@ -195,6 +257,32 @@ class DebugClassLoaderTest extends TestCase
        $this->assertSame($xError, $lastError);
    }

+    public function testReservedForPhp7()
+    {
+        if (\PHP_VERSION_ID >= 70000) {
+            $this->markTestSkipped('PHP7 already prevents using reserved names.');
+        }
+
+        set_error_handler(function () { return false; });
+        $e = error_reporting(0);
+        trigger_error('', E_USER_NOTICE);
+
+        class_exists('Test\\'.Float::class, true);
+
+        error_reporting($e);
+        restore_error_handler();
+
+        $lastError = error_get_last();
+        unset($lastError['file'], $lastError['line']);
+
+        $xError = [
+            'type' => E_USER_DEPRECATED,
+            'message' => 'The "Test\Symfony\Component\Debug\Tests\Float" class uses the reserved name "Float", it will break on PHP 7 and higher',
+        ];
+
+        $this->assertSame($xError, $lastError);
+    }
+
    public function testExtendedFinalClass()
    {
        $deprecations = [];
@@ -204,7 +292,7 @@ class DebugClassLoaderTest extends TestCase
        require __DIR__.'/Fixtures/FinalClasses.php';

        $i = 1;
-        while (class_exists($finalClass = __NAMESPACE__.'\\Fixtures\\FinalClass'.$i++, false)) {
+        while (class_exists($finalClass = Fixtures\FinalClass::class.$i++, false)) {
            spl_autoload_call($finalClass);
            class_exists('Test\\'.__NAMESPACE__.'\\Extends'.substr($finalClass, strrpos($finalClass, '\\') + 1), true);
        }
@@ -230,13 +318,13 @@ class DebugClassLoaderTest extends TestCase
        set_error_handler(function ($type, $msg) use (&$deprecations) { $deprecations[] = $msg; });
        $e = error_reporting(E_USER_DEPRECATED);

-        class_exists(__NAMESPACE__.'\\Fixtures\\ExtendedFinalMethod', true);
+        class_exists(Fixtures\ExtendedFinalMethod::class, true);

        error_reporting($e);
        restore_error_handler();

        $xError = [
-            'The "Symfony\Component\Debug\Tests\Fixtures\FinalMethod::finalMethod()" method is considered final. It may change without further notice as of its next major version. You should not extend it from "Symfony\Component\Debug\Tests\Fixtures\ExtendedFinalMethod".',
+            'The "Symfony\Component\Debug\Tests\Fixtures\FinalMethod::finalMethod()" method is considered final since version 3.3. It may change without further notice as of its next major version. You should not extend it from "Symfony\Component\Debug\Tests\Fixtures\ExtendedFinalMethod".',
            'The "Symfony\Component\Debug\Tests\Fixtures\FinalMethod::finalMethod2()" method is considered final. It may change without further notice as of its next major version. You should not extend it from "Symfony\Component\Debug\Tests\Fixtures\ExtendedFinalMethod".',
        ];

@@ -249,7 +337,7 @@ class DebugClassLoaderTest extends TestCase
        $e = error_reporting(0);
        trigger_error('', E_USER_NOTICE);

-        class_exists('Test\\'.__NAMESPACE__.'\\ExtendsAnnotatedClass', true);
+        class_exists('Test\\'.ExtendsAnnotatedClass::class, true);

        error_reporting($e);
        restore_error_handler();
@@ -266,89 +354,26 @@ class DebugClassLoaderTest extends TestCase
        set_error_handler(function ($type, $msg) use (&$deprecations) { $deprecations[] = $msg; });
        $e = error_reporting(E_USER_DEPRECATED);

-        class_exists('Test\\'.__NAMESPACE__.'\\ExtendsInternals', true);
+        class_exists('Test\\'.ExtendsInternals::class, true);

        error_reporting($e);
        restore_error_handler();

        $this->assertSame($deprecations, [
            'The "Symfony\Component\Debug\Tests\Fixtures\InternalInterface" interface is considered internal. It may change without further notice. You should not use it from "Test\Symfony\Component\Debug\Tests\ExtendsInternalsParent".',
-            'The "Symfony\Component\Debug\Tests\Fixtures\InternalClass" class is considered internal. It may change without further notice. You should not use it from "Test\Symfony\Component\Debug\Tests\ExtendsInternalsParent".',
+            'The "Symfony\Component\Debug\Tests\Fixtures\InternalClass" class is considered internal since version 3.4. It may change without further notice. You should not use it from "Test\Symfony\Component\Debug\Tests\ExtendsInternalsParent".',
            'The "Symfony\Component\Debug\Tests\Fixtures\InternalTrait" trait is considered internal. It may change without further notice. You should not use it from "Test\Symfony\Component\Debug\Tests\ExtendsInternals".',
-            'The "Symfony\Component\Debug\Tests\Fixtures\InternalClass::internalMethod()" method is considered internal. It may change without further notice. You should not extend it from "Test\Symfony\Component\Debug\Tests\ExtendsInternals".',
+            'The "Symfony\Component\Debug\Tests\Fixtures\InternalClass::internalMethod()" method is considered internal since version 3.4. It may change without further notice. You should not extend it from "Test\Symfony\Component\Debug\Tests\ExtendsInternals".',
        ]);
    }

-    public function testExtendedMethodDefinesNewParameters()
-    {
-        $deprecations = [];
-        set_error_handler(function ($type, $msg) use (&$deprecations) { $deprecations[] = $msg; });
-        $e = error_reporting(E_USER_DEPRECATED);
-
-        class_exists(__NAMESPACE__.'\\Fixtures\SubClassWithAnnotatedParameters', true);
-
-        error_reporting($e);
-        restore_error_handler();
-
-        $this->assertSame([
-            'The "Symfony\Component\Debug\Tests\Fixtures\SubClassWithAnnotatedParameters::quzMethod()" method will require a new "Quz $quz" argument in the next major version of its parent class "Symfony\Component\Debug\Tests\Fixtures\ClassWithAnnotatedParameters", not defining it is deprecated.',
-            'The "Symfony\Component\Debug\Tests\Fixtures\SubClassWithAnnotatedParameters::whereAmI()" method will require a new "bool $matrix" argument in the next major version of its parent class "Symfony\Component\Debug\Tests\Fixtures\InterfaceWithAnnotatedParameters", not defining it is deprecated.',
-            'The "Symfony\Component\Debug\Tests\Fixtures\SubClassWithAnnotatedParameters::iAmHere()" method will require a new "$noType" argument in the next major version of its parent class "Symfony\Component\Debug\Tests\Fixtures\InterfaceWithAnnotatedParameters", not defining it is deprecated.',
-            'The "Symfony\Component\Debug\Tests\Fixtures\SubClassWithAnnotatedParameters::iAmHere()" method will require a new "callable(\Throwable|null $reason, mixed $value) $callback" argument in the next major version of its parent class "Symfony\Component\Debug\Tests\Fixtures\InterfaceWithAnnotatedParameters", not defining it is deprecated.',
-            'The "Symfony\Component\Debug\Tests\Fixtures\SubClassWithAnnotatedParameters::iAmHere()" method will require a new "string $param" argument in the next major version of its parent class "Symfony\Component\Debug\Tests\Fixtures\InterfaceWithAnnotatedParameters", not defining it is deprecated.',
-            'The "Symfony\Component\Debug\Tests\Fixtures\SubClassWithAnnotatedParameters::iAmHere()" method will require a new "callable  ($a,  $b) $anotherOne" argument in the next major version of its parent class "Symfony\Component\Debug\Tests\Fixtures\InterfaceWithAnnotatedParameters", not defining it is deprecated.',
-            'The "Symfony\Component\Debug\Tests\Fixtures\SubClassWithAnnotatedParameters::iAmHere()" method will require a new "Type$WithDollarIsStillAType $ccc" argument in the next major version of its parent class "Symfony\Component\Debug\Tests\Fixtures\InterfaceWithAnnotatedParameters", not defining it is deprecated.',
-            'The "Symfony\Component\Debug\Tests\Fixtures\SubClassWithAnnotatedParameters::isSymfony()" method will require a new "true $yes" argument in the next major version of its parent class "Symfony\Component\Debug\Tests\Fixtures\ClassWithAnnotatedParameters", not defining it is deprecated.',
-        ], $deprecations);
-    }
-
    public function testUseTraitWithInternalMethod()
    {
        $deprecations = [];
        set_error_handler(function ($type, $msg) use (&$deprecations) { $deprecations[] = $msg; });
        $e = error_reporting(E_USER_DEPRECATED);

-        class_exists('Test\\'.__NAMESPACE__.'\\UseTraitWithInternalMethod', true);
-
-        error_reporting($e);
-        restore_error_handler();
-
-        $this->assertSame([], $deprecations);
-    }
-
-    public function testVirtualUse()
-    {
-        $deprecations = [];
-        set_error_handler(function ($type, $msg) use (&$deprecations) { $deprecations[] = $msg; });
-        $e = error_reporting(E_USER_DEPRECATED);
-
-        class_exists('Test\\'.__NAMESPACE__.'\\ExtendsVirtual', true);
-
-        error_reporting($e);
-        restore_error_handler();
-
-        $this->assertSame([
-            'Class "Test\Symfony\Component\Debug\Tests\ExtendsVirtualParent" should implement method "Symfony\Component\Debug\Tests\Fixtures\VirtualInterface::sameLineInterfaceMethodNoBraces()".',
-            'Class "Test\Symfony\Component\Debug\Tests\ExtendsVirtualParent" should implement method "Symfony\Component\Debug\Tests\Fixtures\VirtualInterface::newLineInterfaceMethod()": Some description!',
-            'Class "Test\Symfony\Component\Debug\Tests\ExtendsVirtualParent" should implement method "Symfony\Component\Debug\Tests\Fixtures\VirtualInterface::newLineInterfaceMethodNoBraces()": Description.',
-            'Class "Test\Symfony\Component\Debug\Tests\ExtendsVirtualParent" should implement method "Symfony\Component\Debug\Tests\Fixtures\VirtualInterface::invalidInterfaceMethod()".',
-            'Class "Test\Symfony\Component\Debug\Tests\ExtendsVirtualParent" should implement method "Symfony\Component\Debug\Tests\Fixtures\VirtualInterface::invalidInterfaceMethodNoBraces()".',
-            'Class "Test\Symfony\Component\Debug\Tests\ExtendsVirtualParent" should implement method "Symfony\Component\Debug\Tests\Fixtures\VirtualInterface::complexInterfaceMethod($arg, ...$args)".',
-            'Class "Test\Symfony\Component\Debug\Tests\ExtendsVirtualParent" should implement method "Symfony\Component\Debug\Tests\Fixtures\VirtualInterface::complexInterfaceMethodTyped($arg, int ...$args)": Description ...',
-            'Class "Test\Symfony\Component\Debug\Tests\ExtendsVirtualParent" should implement method "static Symfony\Component\Debug\Tests\Fixtures\VirtualInterface::staticMethodNoBraces()".',
-            'Class "Test\Symfony\Component\Debug\Tests\ExtendsVirtualParent" should implement method "static Symfony\Component\Debug\Tests\Fixtures\VirtualInterface::staticMethodTyped(int $arg)": Description.',
-            'Class "Test\Symfony\Component\Debug\Tests\ExtendsVirtualParent" should implement method "static Symfony\Component\Debug\Tests\Fixtures\VirtualInterface::staticMethodTypedNoBraces()".',
-            'Class "Test\Symfony\Component\Debug\Tests\ExtendsVirtual" should implement method "Symfony\Component\Debug\Tests\Fixtures\VirtualSubInterface::subInterfaceMethod()".',
-        ], $deprecations);
-    }
-
-    public function testVirtualUseWithMagicCall()
-    {
-        $deprecations = [];
-        set_error_handler(function ($type, $msg) use (&$deprecations) { $deprecations[] = $msg; });
-        $e = error_reporting(E_USER_DEPRECATED);
-
-        class_exists('Test\\'.__NAMESPACE__.'\\ExtendsVirtualMagicCall', true);
+        class_exists('Test\\'.UseTraitWithInternalMethod::class, true);

        error_reporting($e);
        restore_error_handler();
@@ -358,7 +383,7 @@ class DebugClassLoaderTest extends TestCase

    public function testEvaluatedCode()
    {
-        $this->assertTrue(class_exists(__NAMESPACE__.'\Fixtures\DefinitionInEvaluatedCode', true));
+        $this->assertTrue(class_exists(Fixtures\DefinitionInEvaluatedCode::class, true));
    }
 }

@@ -377,11 +402,11 @@ class ClassLoader
    {
        $fixtureDir = __DIR__.\DIRECTORY_SEPARATOR.'Fixtures'.\DIRECTORY_SEPARATOR;

-        if (__NAMESPACE__.'\TestingUnsilencing' === $class) {
+        if (TestingUnsilencing::class === $class) {
            eval('-- parse error --');
-        } elseif (__NAMESPACE__.'\TestingStacking' === $class) {
+        } elseif (TestingStacking::class === $class) {
            eval('namespace '.__NAMESPACE__.'; class TestingStacking { function foo() {} }');
-        } elseif (__NAMESPACE__.'\TestingCaseMismatch' === $class) {
+        } elseif (TestingCaseMismatch::class === $class) {
            eval('namespace '.__NAMESPACE__.'; class TestingCaseMisMatch {}');
        } elseif (__NAMESPACE__.'\Fixtures\Psr4CaseMismatch' === $class) {
            return $fixtureDir.'psr4'.\DIRECTORY_SEPARATOR.'Psr4CaseMismatch.php';
@@ -391,57 +416,33 @@ class ClassLoader
            return $fixtureDir.'notPsr0Bis.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) {
+        } elseif ('Test\\'.DeprecatedParentClass::class === $class) {
            eval('namespace Test\\'.__NAMESPACE__.'; class DeprecatedParentClass extends \\'.__NAMESPACE__.'\Fixtures\DeprecatedClass {}');
-        } elseif ('Test\\'.__NAMESPACE__.'\DeprecatedInterfaceClass' === $class) {
+        } elseif ('Test\\'.DeprecatedInterfaceClass::class === $class) {
            eval('namespace Test\\'.__NAMESPACE__.'; class DeprecatedInterfaceClass implements \\'.__NAMESPACE__.'\Fixtures\DeprecatedInterface {}');
-        } elseif ('Test\\'.__NAMESPACE__.'\NonDeprecatedInterfaceClass' === $class) {
+        } elseif ('Test\\'.NonDeprecatedInterfaceClass::class === $class) {
            eval('namespace Test\\'.__NAMESPACE__.'; class NonDeprecatedInterfaceClass implements \\'.__NAMESPACE__.'\Fixtures\NonDeprecatedInterface {}');
-        } elseif ('Test\\'.__NAMESPACE__.'\Float' === $class) {
+        } elseif ('Test\\'.Float::class === $class) {
            eval('namespace Test\\'.__NAMESPACE__.'; class Float {}');
-        } elseif (0 === strpos($class, 'Test\\'.__NAMESPACE__.'\ExtendsFinalClass')) {
+        } elseif (0 === strpos($class, 'Test\\'.ExtendsFinalClass::class)) {
            $classShortName = substr($class, strrpos($class, '\\') + 1);
            eval('namespace Test\\'.__NAMESPACE__.'; class '.$classShortName.' extends \\'.__NAMESPACE__.'\Fixtures\\'.substr($classShortName, 7).' {}');
-        } elseif ('Test\\'.__NAMESPACE__.'\ExtendsAnnotatedClass' === $class) {
+        } elseif ('Test\\'.ExtendsAnnotatedClass::class === $class) {
            eval('namespace Test\\'.__NAMESPACE__.'; class ExtendsAnnotatedClass extends \\'.__NAMESPACE__.'\Fixtures\AnnotatedClass {
                public function deprecatedMethod() { }
            }');
-        } elseif ('Test\\'.__NAMESPACE__.'\ExtendsInternals' === $class) {
+        } elseif ('Test\\'.ExtendsInternals::class === $class) {
            eval('namespace Test\\'.__NAMESPACE__.'; class ExtendsInternals extends ExtendsInternalsParent {
                use \\'.__NAMESPACE__.'\Fixtures\InternalTrait;

                public function internalMethod() { }
            }');
-        } elseif ('Test\\'.__NAMESPACE__.'\ExtendsInternalsParent' === $class) {
+        } elseif ('Test\\'.ExtendsInternalsParent::class === $class) {
            eval('namespace Test\\'.__NAMESPACE__.'; class ExtendsInternalsParent extends \\'.__NAMESPACE__.'\Fixtures\InternalClass implements \\'.__NAMESPACE__.'\Fixtures\InternalInterface { }');
-        } elseif ('Test\\'.__NAMESPACE__.'\UseTraitWithInternalMethod' === $class) {
+        } elseif ('Test\\'.UseTraitWithInternalMethod::class === $class) {
            eval('namespace Test\\'.__NAMESPACE__.'; class UseTraitWithInternalMethod { use \\'.__NAMESPACE__.'\Fixtures\TraitWithInternalMethod; }');
-        } elseif ('Test\\'.__NAMESPACE__.'\ExtendsVirtual' === $class) {
-            eval('namespace Test\\'.__NAMESPACE__.'; class ExtendsVirtual extends ExtendsVirtualParent implements \\'.__NAMESPACE__.'\Fixtures\VirtualSubInterface {
-                public function ownClassMethod() { }
-                public function classMethod() { }
-                public function sameLineInterfaceMethodNoBraces() { }
-            }');
-        } elseif ('Test\\'.__NAMESPACE__.'\ExtendsVirtualParent' === $class) {
-            eval('namespace Test\\'.__NAMESPACE__.'; class ExtendsVirtualParent extends ExtendsVirtualAbstract {
-                public function ownParentMethod() { }
-                public function traitMethod() { }
-                public function sameLineInterfaceMethod() { }
-                public function staticMethodNoBraces() { } // should be static
-            }');
-        } elseif ('Test\\'.__NAMESPACE__.'\ExtendsVirtualAbstract' === $class) {
-            eval('namespace Test\\'.__NAMESPACE__.'; abstract class ExtendsVirtualAbstract extends ExtendsVirtualAbstractBase {
-                public static function staticMethod() { }
-                public function ownAbstractMethod() { }
-                public function interfaceMethod() { }
-            }');
-        } elseif ('Test\\'.__NAMESPACE__.'\ExtendsVirtualAbstractBase' === $class) {
-            eval('namespace Test\\'.__NAMESPACE__.'; abstract class ExtendsVirtualAbstractBase extends \\'.__NAMESPACE__.'\Fixtures\VirtualClass implements \\'.__NAMESPACE__.'\Fixtures\VirtualInterface {
-                public function ownAbstractBaseMethod() { }
-            }');
-        } elseif ('Test\\'.__NAMESPACE__.'\ExtendsVirtualMagicCall' === $class) {
-            eval('namespace Test\\'.__NAMESPACE__.'; class ExtendsVirtualMagicCall extends \\'.__NAMESPACE__.'\Fixtures\VirtualClassMagicCall implements \\'.__NAMESPACE__.'\Fixtures\VirtualInterface {
-            }');
        }
+
+        return null;
    }
 }
--- a/Tests/ErrorHandlerTest.php
+++ b/Tests/ErrorHandlerTest.php
@@ -25,8 +25,6 @@ use Symfony\Component\Debug\Tests\Fixtures\LoggerThatSetAnErrorHandler;
 *
 * @author Robert Schönthal <seroscho@googlemail.com>
 * @author Nicolas Grekas <p@tchwork.com>
- *
- * @group legacy
 */
 class ErrorHandlerTest extends TestCase
 {
@@ -75,12 +73,12 @@ class ErrorHandlerTest extends TestCase
        $logger = $this->getMockBuilder('Psr\Log\LoggerInterface')->getMock();
        $handler = ErrorHandler::register();
        $handler->setDefaultLogger($logger);
-        $handler->screamAt(E_ALL);
+        $handler->screamAt(\E_ALL);

        try {
-            @trigger_error('Hello', E_USER_WARNING);
+            @trigger_error('Hello', \E_USER_WARNING);
            $expected = [
-                'type' => E_USER_WARNING,
+                'type' => \E_USER_WARNING,
                'message' => 'Hello',
                'file' => __FILE__,
                'line' => __LINE__ - 5,
@@ -103,9 +101,14 @@ class ErrorHandlerTest extends TestCase
            $this->fail('ErrorException expected');
        } catch (\ErrorException $exception) {
            // if an exception is thrown, the test passed
-            $this->assertEquals(E_NOTICE, $exception->getSeverity());
+            if (\PHP_VERSION_ID < 80000) {
+                $this->assertEquals(\E_NOTICE, $exception->getSeverity());
+                $this->assertMatchesRegularExpression('/^Notice: Undefined variable: (foo|bar)/', $exception->getMessage());
+            } else {
+                $this->assertEquals(\E_WARNING, $exception->getSeverity());
+                $this->assertMatchesRegularExpression('/^Warning: Undefined variable \$(foo|bar)/', $exception->getMessage());
+            }
            $this->assertEquals(__FILE__, $exception->getFile());
-            $this->assertRegExp('/^Notice: Undefined variable: (foo|bar)/', $exception->getMessage());

            $trace = $exception->getTrace();

@@ -135,7 +138,7 @@ class ErrorHandlerTest extends TestCase
        try {
            $handler = ErrorHandler::register();
            $handler->throwAt(3, true);
-            $this->assertEquals(3 | E_RECOVERABLE_ERROR | E_USER_ERROR, $handler->throwAt(0));
+            $this->assertEquals(3 | \E_RECOVERABLE_ERROR | \E_USER_ERROR, $handler->throwAt(0));
        } finally {
            restore_error_handler();
            restore_exception_handler();
@@ -148,25 +151,25 @@ class ErrorHandlerTest extends TestCase
            $logger = $this->getMockBuilder('Psr\Log\LoggerInterface')->getMock();
            $handler = ErrorHandler::register();

-            $handler->setDefaultLogger($logger, E_NOTICE);
-            $handler->setDefaultLogger($logger, [E_USER_NOTICE => LogLevel::CRITICAL]);
+            $handler->setDefaultLogger($logger, \E_NOTICE);
+            $handler->setDefaultLogger($logger, [\E_USER_NOTICE => LogLevel::CRITICAL]);

            $loggers = [
-                E_DEPRECATED => [null, LogLevel::INFO],
-                E_USER_DEPRECATED => [null, LogLevel::INFO],
-                E_NOTICE => [$logger, LogLevel::WARNING],
-                E_USER_NOTICE => [$logger, LogLevel::CRITICAL],
-                E_STRICT => [null, LogLevel::WARNING],
-                E_WARNING => [null, LogLevel::WARNING],
-                E_USER_WARNING => [null, LogLevel::WARNING],
-                E_COMPILE_WARNING => [null, LogLevel::WARNING],
-                E_CORE_WARNING => [null, LogLevel::WARNING],
-                E_USER_ERROR => [null, LogLevel::CRITICAL],
-                E_RECOVERABLE_ERROR => [null, LogLevel::CRITICAL],
-                E_COMPILE_ERROR => [null, LogLevel::CRITICAL],
-                E_PARSE => [null, LogLevel::CRITICAL],
-                E_ERROR => [null, LogLevel::CRITICAL],
-                E_CORE_ERROR => [null, LogLevel::CRITICAL],
+                \E_DEPRECATED => [null, LogLevel::INFO],
+                \E_USER_DEPRECATED => [null, LogLevel::INFO],
+                \E_NOTICE => [$logger, LogLevel::WARNING],
+                \E_USER_NOTICE => [$logger, LogLevel::CRITICAL],
+                \E_STRICT => [null, LogLevel::WARNING],
+                \E_WARNING => [null, LogLevel::WARNING],
+                \E_USER_WARNING => [null, LogLevel::WARNING],
+                \E_COMPILE_WARNING => [null, LogLevel::WARNING],
+                \E_CORE_WARNING => [null, LogLevel::WARNING],
+                \E_USER_ERROR => [null, LogLevel::CRITICAL],
+                \E_RECOVERABLE_ERROR => [null, LogLevel::CRITICAL],
+                \E_COMPILE_ERROR => [null, LogLevel::CRITICAL],
+                \E_PARSE => [null, LogLevel::CRITICAL],
+                \E_ERROR => [null, LogLevel::CRITICAL],
+                \E_CORE_ERROR => [null, LogLevel::CRITICAL],
            ];
            $this->assertSame($loggers, $handler->setLoggers([]));
        } finally {
@@ -207,15 +210,15 @@ class ErrorHandlerTest extends TestCase
            restore_exception_handler();

            $handler = ErrorHandler::register();
-            $handler->throwAt(E_USER_DEPRECATED, true);
-            $this->assertFalse($handler->handleError(E_USER_DEPRECATED, 'foo', 'foo.php', 12, []));
+            $handler->throwAt(\E_USER_DEPRECATED, true);
+            $this->assertFalse($handler->handleError(\E_USER_DEPRECATED, 'foo', 'foo.php', 12, []));

            restore_error_handler();
            restore_exception_handler();

            $handler = ErrorHandler::register();
-            $handler->throwAt(E_DEPRECATED, true);
-            $this->assertFalse($handler->handleError(E_DEPRECATED, 'foo', 'foo.php', 12, []));
+            $handler->throwAt(\E_DEPRECATED, true);
+            $this->assertFalse($handler->handleError(\E_DEPRECATED, 'foo', 'foo.php', 12, []));

            restore_error_handler();
            restore_exception_handler();
@@ -229,7 +232,7 @@ class ErrorHandlerTest extends TestCase
                $exception = $context['exception'];
                $this->assertInstanceOf(\ErrorException::class, $exception);
                $this->assertSame('User Deprecated: foo', $exception->getMessage());
-                $this->assertSame(E_USER_DEPRECATED, $exception->getSeverity());
+                $this->assertSame(\E_USER_DEPRECATED, $exception->getSeverity());
            };

            $logger
@@ -239,8 +242,8 @@ class ErrorHandlerTest extends TestCase
            ;

            $handler = ErrorHandler::register();
-            $handler->setDefaultLogger($logger, E_USER_DEPRECATED);
-            $this->assertTrue($handler->handleError(E_USER_DEPRECATED, 'foo', 'foo.php', 12, []));
+            $handler->setDefaultLogger($logger, \E_USER_DEPRECATED);
+            $this->assertTrue($handler->handleError(\E_USER_DEPRECATED, 'foo', 'foo.php', 12, []));

            restore_error_handler();
            restore_exception_handler();
@@ -249,11 +252,17 @@ class ErrorHandlerTest extends TestCase

            $line = null;
            $logArgCheck = function ($level, $message, $context) use (&$line) {
-                $this->assertEquals('Notice: Undefined variable: undefVar', $message);
                $this->assertArrayHasKey('exception', $context);
                $exception = $context['exception'];
+
+                if (\PHP_VERSION_ID < 80000) {
+                    $this->assertEquals('Notice: Undefined variable: undefVar', $message);
+                    $this->assertSame(\E_NOTICE, $exception->getSeverity());
+                } else {
+                    $this->assertEquals('Warning: Undefined variable $undefVar', $message);
+                    $this->assertSame(\E_WARNING, $exception->getSeverity());
+                }
                $this->assertInstanceOf(SilencedErrorContext::class, $exception);
-                $this->assertSame(E_NOTICE, $exception->getSeverity());
                $this->assertSame(__FILE__, $exception->getFile());
                $this->assertSame($line, $exception->getLine());
                $this->assertNotEmpty($exception->getTrace());
@@ -267,8 +276,13 @@ class ErrorHandlerTest extends TestCase
            ;

            $handler = ErrorHandler::register();
-            $handler->setDefaultLogger($logger, E_NOTICE);
-            $handler->screamAt(E_NOTICE);
+            if (\PHP_VERSION_ID < 80000) {
+                $handler->setDefaultLogger($logger, \E_NOTICE);
+                $handler->screamAt(\E_NOTICE);
+            } else {
+                $handler->setDefaultLogger($logger, \E_WARNING);
+                $handler->screamAt(\E_WARNING);
+            }
            unset($undefVar);
            $line = __LINE__ + 1;
            @$undefVar++;
@@ -328,11 +342,12 @@ class ErrorHandlerTest extends TestCase

        $handler = new ErrorHandler();
        $handler->setDefaultLogger($logger);
-        @$handler->handleError(E_USER_DEPRECATED, 'Foo deprecation', __FILE__, __LINE__, []);
-
-        restore_error_handler();
+        @$handler->handleError(\E_USER_DEPRECATED, 'Foo deprecation', __FILE__, __LINE__, []);
    }

+    /**
+     * @group no-hhvm
+     */
    public function testHandleException()
    {
        try {
@@ -353,7 +368,7 @@ class ErrorHandlerTest extends TestCase
                ->willReturnCallback($logArgCheck)
            ;

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

            try {
                $handler->handleException($exception);
@@ -373,32 +388,64 @@ class ErrorHandlerTest extends TestCase
        }
    }

+    /**
+     * @group legacy
+     */
+    public function testErrorStacking()
+    {
+        try {
+            $handler = ErrorHandler::register();
+            $handler->screamAt(\E_USER_WARNING);
+
+            $logger = $this->getMockBuilder('Psr\Log\LoggerInterface')->getMock();
+
+            $logger
+                ->expects($this->exactly(2))
+                ->method('log')
+                ->withConsecutive(
+                    [$this->equalTo(LogLevel::WARNING), $this->equalTo('Dummy log')],
+                    [$this->equalTo(LogLevel::DEBUG), $this->equalTo('User Warning: Silenced warning')]
+                )
+            ;
+
+            $handler->setDefaultLogger($logger, [\E_USER_WARNING => LogLevel::WARNING]);
+
+            ErrorHandler::stackErrors();
+            @trigger_error('Silenced warning', \E_USER_WARNING);
+            $logger->log(LogLevel::WARNING, 'Dummy log');
+            ErrorHandler::unstackErrors();
+        } finally {
+            restore_error_handler();
+            restore_exception_handler();
+        }
+    }
+
    public function testBootstrappingLogger()
    {
        $bootLogger = new BufferingLogger();
        $handler = new ErrorHandler($bootLogger);

        $loggers = [
-            E_DEPRECATED => [$bootLogger, LogLevel::INFO],
-            E_USER_DEPRECATED => [$bootLogger, LogLevel::INFO],
-            E_NOTICE => [$bootLogger, LogLevel::WARNING],
-            E_USER_NOTICE => [$bootLogger, LogLevel::WARNING],
-            E_STRICT => [$bootLogger, LogLevel::WARNING],
-            E_WARNING => [$bootLogger, LogLevel::WARNING],
-            E_USER_WARNING => [$bootLogger, LogLevel::WARNING],
-            E_COMPILE_WARNING => [$bootLogger, LogLevel::WARNING],
-            E_CORE_WARNING => [$bootLogger, LogLevel::WARNING],
-            E_USER_ERROR => [$bootLogger, LogLevel::CRITICAL],
-            E_RECOVERABLE_ERROR => [$bootLogger, LogLevel::CRITICAL],
-            E_COMPILE_ERROR => [$bootLogger, LogLevel::CRITICAL],
-            E_PARSE => [$bootLogger, LogLevel::CRITICAL],
-            E_ERROR => [$bootLogger, LogLevel::CRITICAL],
-            E_CORE_ERROR => [$bootLogger, LogLevel::CRITICAL],
+            \E_DEPRECATED => [$bootLogger, LogLevel::INFO],
+            \E_USER_DEPRECATED => [$bootLogger, LogLevel::INFO],
+            \E_NOTICE => [$bootLogger, LogLevel::WARNING],
+            \E_USER_NOTICE => [$bootLogger, LogLevel::WARNING],
+            \E_STRICT => [$bootLogger, LogLevel::WARNING],
+            \E_WARNING => [$bootLogger, LogLevel::WARNING],
+            \E_USER_WARNING => [$bootLogger, LogLevel::WARNING],
+            \E_COMPILE_WARNING => [$bootLogger, LogLevel::WARNING],
+            \E_CORE_WARNING => [$bootLogger, LogLevel::WARNING],
+            \E_USER_ERROR => [$bootLogger, LogLevel::CRITICAL],
+            \E_RECOVERABLE_ERROR => [$bootLogger, LogLevel::CRITICAL],
+            \E_COMPILE_ERROR => [$bootLogger, LogLevel::CRITICAL],
+            \E_PARSE => [$bootLogger, LogLevel::CRITICAL],
+            \E_ERROR => [$bootLogger, LogLevel::CRITICAL],
+            \E_CORE_ERROR => [$bootLogger, LogLevel::CRITICAL],
        ];

        $this->assertSame($loggers, $handler->setLoggers([]));

-        $handler->handleError(E_DEPRECATED, 'Foo message', __FILE__, 123, []);
+        $handler->handleError(\E_DEPRECATED, 'Foo message', __FILE__, 123, []);

        $logs = $bootLogger->cleanLogs();

@@ -412,7 +459,7 @@ class ErrorHandlerTest extends TestCase
        $this->assertSame('Deprecated: Foo message', $exception->getMessage());
        $this->assertSame(__FILE__, $exception->getFile());
        $this->assertSame(123, $exception->getLine());
-        $this->assertSame(E_DEPRECATED, $exception->getSeverity());
+        $this->assertSame(\E_DEPRECATED, $exception->getSeverity());

        $bootLogger->log(LogLevel::WARNING, 'Foo message', ['exception' => $exception]);

@@ -421,9 +468,12 @@ class ErrorHandlerTest extends TestCase
            ->method('log')
            ->with(LogLevel::WARNING, 'Foo message', ['exception' => $exception]);

-        $handler->setLoggers([E_DEPRECATED => [$mockLogger, LogLevel::WARNING]]);
+        $handler->setLoggers([\E_DEPRECATED => [$mockLogger, LogLevel::WARNING]]);
    }

+    /**
+     * @group no-hhvm
+     */
    public function testSettingLoggerWhenExceptionIsBuffered()
    {
        $bootLogger = new BufferingLogger();
@@ -443,6 +493,9 @@ class ErrorHandlerTest extends TestCase
        $handler->handleException($exception);
    }

+    /**
+     * @group no-hhvm
+     */
    public function testHandleFatalError()
    {
        try {
@@ -450,7 +503,7 @@ class ErrorHandlerTest extends TestCase
            $handler = ErrorHandler::register();

            $error = [
-                'type' => E_PARSE,
+                'type' => \E_PARSE,
                'message' => 'foo',
                'file' => 'bar',
                'line' => 123,
@@ -468,7 +521,7 @@ class ErrorHandlerTest extends TestCase
                ->willReturnCallback($logArgCheck)
            ;

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

            $handler->handleFatalError($error);

@@ -482,6 +535,9 @@ class ErrorHandlerTest extends TestCase
        }
    }

+    /**
+     * @requires PHP 7
+     */
    public function testHandleErrorException()
    {
        $exception = new \Error("Class 'IReallyReallyDoNotExistAnywhereInTheRepositoryISwear' not found");
@@ -497,6 +553,50 @@ class ErrorHandlerTest extends TestCase
        $this->assertStringStartsWith("Attempted to load class \"IReallyReallyDoNotExistAnywhereInTheRepositoryISwear\" from the global namespace.\nDid you forget a \"use\" statement", $args[0]->getMessage());
    }

+    /**
+     * @group no-hhvm
+     */
+    public function testHandleFatalErrorOnHHVM()
+    {
+        if (!\defined('HHVM_VERSION')) {
+            $this->markTestSkipped('This test requires HHVM.');
+        }
+
+        try {
+            $handler = ErrorHandler::register();
+
+            $logger = $this->getMockBuilder('Psr\Log\LoggerInterface')->getMock();
+            $logger
+                ->expects($this->once())
+                ->method('log')
+                ->with(
+                    $this->equalTo(LogLevel::CRITICAL),
+                    $this->equalTo('Fatal Error: foo')
+                )
+            ;
+
+            $handler->setDefaultLogger($logger, \E_ERROR);
+
+            $error = [
+                'type' => \E_ERROR + 0x1000000, // This error level is used by HHVM for fatal errors
+                'message' => 'foo',
+                'file' => 'bar',
+                'line' => 123,
+                'context' => [123],
+                'backtrace' => [456],
+            ];
+
+            \call_user_func_array([$handler, 'handleError'], $error);
+            $handler->handleFatalError($error);
+        } finally {
+            restore_error_handler();
+            restore_exception_handler();
+        }
+    }
+
+    /**
+     * @group no-hhvm
+     */
    public function testCustomExceptionHandler()
    {
        $this->expectException('Exception');
@@ -527,8 +627,8 @@ class ErrorHandlerTest extends TestCase
                $handler = ErrorHandlerThatUsesThePreviousOne::register();
            }

-            @trigger_error('foo', E_USER_DEPRECATED);
-            @trigger_error('bar', E_USER_DEPRECATED);
+            @trigger_error('foo', \E_USER_DEPRECATED);
+            @trigger_error('bar', \E_USER_DEPRECATED);

            $this->assertSame([$handler, 'handleError'], set_error_handler('var_dump'));

--- a/Tests/Exception/FlattenExceptionTest.php
+++ b/Tests/Exception/FlattenExceptionTest.php
@@ -12,7 +12,6 @@
 namespace Symfony\Component\Debug\Tests\Exception;

 use PHPUnit\Framework\TestCase;
-use Symfony\Component\Debug\Exception\FatalThrowableError;
 use Symfony\Component\Debug\Exception\FlattenException;
 use Symfony\Component\HttpFoundation\Exception\SuspiciousOperationException;
 use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
@@ -30,9 +29,6 @@ use Symfony\Component\HttpKernel\Exception\TooManyRequestsHttpException;
 use Symfony\Component\HttpKernel\Exception\UnauthorizedHttpException;
 use Symfony\Component\HttpKernel\Exception\UnsupportedMediaTypeHttpException;

-/**
- * @group legacy
- */
 class FlattenExceptionTest extends TestCase
 {
    public function testStatusCode()
@@ -43,12 +39,6 @@ class FlattenExceptionTest extends TestCase
        $flattened = FlattenException::create(new \RuntimeException());
        $this->assertEquals('500', $flattened->getStatusCode());

-        $flattened = FlattenException::createFromThrowable(new \DivisionByZeroError(), 403);
-        $this->assertEquals('403', $flattened->getStatusCode());
-
-        $flattened = FlattenException::createFromThrowable(new \DivisionByZeroError());
-        $this->assertEquals('500', $flattened->getStatusCode());
-
        $flattened = FlattenException::create(new NotFoundHttpException());
        $this->assertEquals('404', $flattened->getStatusCode());

@@ -121,10 +111,10 @@ class FlattenExceptionTest extends TestCase
    /**
     * @dataProvider flattenDataProvider
     */
-    public function testFlattenHttpException(\Throwable $exception)
+    public function testFlattenHttpException(\Exception $exception)
    {
-        $flattened = FlattenException::createFromThrowable($exception);
-        $flattened2 = FlattenException::createFromThrowable($exception);
+        $flattened = FlattenException::create($exception);
+        $flattened2 = FlattenException::create($exception);

        $flattened->setPrevious($flattened2);

@@ -133,33 +123,13 @@ class FlattenExceptionTest extends TestCase
        $this->assertInstanceOf($flattened->getClass(), $exception, 'The class is set to the class of the original exception');
    }

-    public function testWrappedThrowable()
-    {
-        $exception = new FatalThrowableError(new \DivisionByZeroError('Ouch', 42));
-        $flattened = FlattenException::create($exception);
-
-        $this->assertSame('Ouch', $flattened->getMessage(), 'The message is copied from the original error.');
-        $this->assertSame(42, $flattened->getCode(), 'The code is copied from the original error.');
-        $this->assertSame('DivisionByZeroError', $flattened->getClass(), 'The class is set to the class of the original error');
-    }
-
-    public function testThrowable()
-    {
-        $error = new \DivisionByZeroError('Ouch', 42);
-        $flattened = FlattenException::createFromThrowable($error);
-
-        $this->assertSame('Ouch', $flattened->getMessage(), 'The message is copied from the original error.');
-        $this->assertSame(42, $flattened->getCode(), 'The code is copied from the original error.');
-        $this->assertSame('DivisionByZeroError', $flattened->getClass(), 'The class is set to the class of the original error');
-    }
-
    /**
     * @dataProvider flattenDataProvider
     */
-    public function testPrevious(\Throwable $exception)
+    public function testPrevious(\Exception $exception)
    {
-        $flattened = FlattenException::createFromThrowable($exception);
-        $flattened2 = FlattenException::createFromThrowable($exception);
+        $flattened = FlattenException::create($exception);
+        $flattened2 = FlattenException::create($exception);

        $flattened->setPrevious($flattened2);

@@ -168,47 +138,50 @@ class FlattenExceptionTest extends TestCase
        $this->assertSame([$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(), '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(), 'ParseError', 'The class is set to the class of the original exception');
+        $this->assertEquals('Parse error: Oh noes!', $flattened->getMessage(), 'The message is copied from the original exception.');
+        $this->assertEquals(42, $flattened->getCode(), 'The code is copied from the original exception.');
+        $this->assertEquals('Symfony\Component\Debug\Exception\FatalThrowableError', $flattened->getClass(), 'The class is set to the class of the original exception');
    }

    /**
     * @dataProvider flattenDataProvider
     */
-    public function testLine(\Throwable $exception)
+    public function testLine(\Exception $exception)
    {
-        $flattened = FlattenException::createFromThrowable($exception);
+        $flattened = FlattenException::create($exception);
        $this->assertSame($exception->getLine(), $flattened->getLine());
    }

    /**
     * @dataProvider flattenDataProvider
     */
-    public function testFile(\Throwable $exception)
+    public function testFile(\Exception $exception)
    {
-        $flattened = FlattenException::createFromThrowable($exception);
+        $flattened = FlattenException::create($exception);
        $this->assertSame($exception->getFile(), $flattened->getFile());
    }

    /**
     * @dataProvider flattenDataProvider
     */
-    public function testToArray(\Throwable $exception, string $expectedClass)
+    public function testToArray(\Exception $exception)
    {
-        $flattened = FlattenException::createFromThrowable($exception);
+        $flattened = FlattenException::create($exception);
        $flattened->setTrace([], 'foo.php', 123);

        $this->assertEquals([
            [
                'message' => 'test',
-                'class' => $expectedClass,
+                'class' => 'Exception',
                'trace' => [[
                    'namespace' => '', 'short_class' => '', 'class' => '', 'type' => '', 'function' => '', 'file' => 'foo.php', 'line' => 123,
                    'args' => [],
@@ -217,29 +190,19 @@ class FlattenExceptionTest extends TestCase
        ], $flattened->toArray());
    }

-    public function testCreate()
-    {
-        $exception = new NotFoundHttpException(
-            'test',
-            new \RuntimeException('previous', 123)
-        );
-
-        $this->assertSame(
-            FlattenException::createFromThrowable($exception)->toArray(),
-            FlattenException::create($exception)->toArray()
-        );
-    }
-
    public function flattenDataProvider()
    {
        return [
-            [new \Exception('test', 123), 'Exception'],
-            [new \Error('test', 123), 'Error'],
+            [new \Exception('test', 123)],
        ];
    }

    public function testArguments()
    {
+        if (\PHP_VERSION_ID >= 70400) {
+            $this->markTestSkipped('PHP 7.4 removes arguments from exception traces.');
+        }
+
        $dh = opendir(__DIR__);
        $fh = tmpfile();

@@ -261,8 +224,8 @@ class FlattenExceptionTest extends TestCase
            0.0,
            '0',
            '',
-            INF,
-            NAN,
+            \INF,
+            \NAN,
        ]);

        $flattened = FlattenException::create($exception);
@@ -277,7 +240,7 @@ class FlattenExceptionTest extends TestCase
        $this->assertSame(['object', 'stdClass'], $array[$i++]);
        $this->assertSame(['object', 'Symfony\Component\HttpKernel\Exception\NotFoundHttpException'], $array[$i++]);
        $this->assertSame(['incomplete-object', 'BogusTestClass'], $array[$i++]);
-        $this->assertSame(['resource', 'stream'], $array[$i++]);
+        $this->assertSame(['resource', \defined('HHVM_VERSION') ? 'Directory' : 'stream'], $array[$i++]);
        $this->assertSame(['resource', 'stream'], $array[$i++]);

        $args = $array[$i++];
@@ -293,15 +256,19 @@ class FlattenExceptionTest extends TestCase
        $this->assertSame(['float', 0.0], $array[$i++]);
        $this->assertSame(['string', '0'], $array[$i++]);
        $this->assertSame(['string', ''], $array[$i++]);
-        $this->assertSame(['float', INF], $array[$i++]);
+        $this->assertSame(['float', \INF], $array[$i++]);

        // assertEquals() does not like NAN values.
-        $this->assertEquals($array[$i][0], 'float');
+        $this->assertEquals('float', $array[$i][0]);
        $this->assertNan($array[$i][1]);
    }

    public function testRecursionInArguments()
    {
+        if (\PHP_VERSION_ID >= 70400) {
+            $this->markTestSkipped('PHP 7.4 removes arguments from exception traces.');
+        }
+
        $a = null;
        $a = ['foo', [2, &$a]];
        $exception = $this->createException($a);
@@ -313,6 +280,10 @@ class FlattenExceptionTest extends TestCase

    public function testTooBigArray()
    {
+        if (\PHP_VERSION_ID >= 70400) {
+            $this->markTestSkipped('PHP 7.4 removes arguments from exception traces.');
+        }
+
        $a = [];
        for ($i = 0; $i < 20; ++$i) {
            for ($j = 0; $j < 50; ++$j) {
@@ -336,54 +307,6 @@ class FlattenExceptionTest extends TestCase
        $this->assertStringNotContainsString('*value1*', $serializeTrace);
    }

-    public function testAnonymousClass()
-    {
-        $flattened = FlattenException::create(new class() extends \RuntimeException {
-        });
-
-        $this->assertSame('RuntimeException@anonymous', $flattened->getClass());
-
-        $flattened = FlattenException::create(new \Exception(sprintf('Class "%s" blah.', \get_class(new class() extends \RuntimeException {
-        }))));
-
-        $this->assertSame('Class "RuntimeException@anonymous" blah.', $flattened->getMessage());
-    }
-
-    public function testToStringEmptyMessage()
-    {
-        $exception = new \RuntimeException();
-
-        $flattened = FlattenException::create($exception);
-
-        $this->assertSame($exception->getTraceAsString(), $flattened->getTraceAsString());
-        $this->assertSame($exception->__toString(), $flattened->getAsString());
-    }
-
-    public function testToString()
-    {
-        $test = function ($a, $b, $c, $d) {
-            return new \RuntimeException('This is a test message');
-        };
-
-        $exception = $test('foo123', 1, null, 1.5);
-
-        $flattened = FlattenException::create($exception);
-
-        $this->assertSame($exception->getTraceAsString(), $flattened->getTraceAsString());
-        $this->assertSame($exception->__toString(), $flattened->getAsString());
-    }
-
-    public function testToStringParent()
-    {
-        $exception = new \LogicException('This is message 1');
-        $exception = new \RuntimeException('This is messsage 2', 500, $exception);
-
-        $flattened = FlattenException::create($exception);
-
-        $this->assertSame($exception->getTraceAsString(), $flattened->getTraceAsString());
-        $this->assertSame($exception->__toString(), $flattened->getAsString());
-    }
-
    private function createException($foo)
    {
        return new \Exception();
--- a/Tests/ExceptionHandlerTest.php
+++ b/Tests/ExceptionHandlerTest.php
@@ -19,24 +19,18 @@ use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;

 require_once __DIR__.'/HeaderMock.php';

-/**
- * @group legacy
- */
 class ExceptionHandlerTest extends TestCase
 {
-    protected function setUp(): void
+    protected function setUp()
    {
        testHeader();
    }

-    protected function tearDown(): void
+    protected function tearDown()
    {
        testHeader();
    }

-    /**
-     * @group legacy
-     */
    public function testDebug()
    {
        $handler = new ExceptionHandler(false);
@@ -54,17 +48,8 @@ class ExceptionHandlerTest extends TestCase
        $handler->sendPhpResponse(new \RuntimeException('Foo'));
        $response = ob_get_clean();

-        $this->assertStringContainsString('<h1 class="break-long-words exception-message">Foo</h1>', $response);
+        $this->assertStringContainsString('Whoops, looks like something went wrong.', $response);
        $this->assertStringContainsString('<div class="trace trace-as-html">', $response);
-
-        // taken from https://www.owasp.org/index.php/Cross-site_Scripting_(XSS)
-        $htmlWithXss = '<body onload=alert(\'test1\')> <b onmouseover=alert(\'Wufff!\')>click me!</b> <img src="j&#X41vascript:alert(\'test2\')"> <meta http-equiv="refresh"
-content="0;url=data:text/html;base64,PHNjcmlwdD5hbGVydCgndGVzdDMnKTwvc2NyaXB0Pg">';
-        ob_start();
-        $handler->sendPhpResponse(new \RuntimeException($htmlWithXss));
-        $response = ob_get_clean();
-
-        $this->assertStringContainsString(sprintf('<h1 class="break-long-words exception-message">%s</h1>', htmlspecialchars($htmlWithXss, ENT_COMPAT | ENT_SUBSTITUTE, 'UTF-8')), $response);
    }

    public function testStatusCode()
@@ -165,7 +150,7 @@ content="0;url=data:text/html;base64,PHNjcmlwdD5hbGVydCgndGVzdDMnKTwvc2NyaXB0Pg"
            $this->fail('OutOfMemoryException should bypass the handler');
        });

-        $handler->handle(new OutOfMemoryException('foo', 0, E_ERROR, __FILE__, __LINE__));
+        $handler->handle(new OutOfMemoryException('foo', 0, \E_ERROR, __FILE__, __LINE__));

        $this->assertThatTheExceptionWasOutput(ob_get_clean(), OutOfMemoryException::class, 'OutOfMemoryException', 'foo');
    }
--- a/Tests/FatalErrorHandler/ClassNotFoundFatalErrorHandlerTest.php
+++ b/Tests/FatalErrorHandler/ClassNotFoundFatalErrorHandlerTest.php
@@ -17,12 +17,9 @@ use Symfony\Component\Debug\DebugClassLoader;
 use Symfony\Component\Debug\Exception\FatalErrorException;
 use Symfony\Component\Debug\FatalErrorHandler\ClassNotFoundFatalErrorHandler;

-/**
- * @group legacy
- */
 class ClassNotFoundFatalErrorHandlerTest extends TestCase
 {
-    public static function setUpBeforeClass(): void
+    public static function setUpBeforeClass()
    {
        foreach (spl_autoload_functions() as $function) {
            if (!\is_array($function)) {
@@ -32,10 +29,14 @@ class ClassNotFoundFatalErrorHandlerTest extends TestCase
            // get class loaders wrapped by DebugClassLoader
            if ($function[0] instanceof DebugClassLoader) {
                $function = $function[0]->getClassLoader();
+
+                if (!\is_array($function)) {
+                    continue;
+                }
            }

            if ($function[0] instanceof ComposerClassLoader) {
-                $function[0]->add('Symfony_Component_Debug_Tests_Fixtures', \dirname(__DIR__, 5));
+                $function[0]->add('Symfony_Component_Debug_Tests_Fixtures', \dirname(\dirname(\dirname(\dirname(\dirname(__DIR__))))));
                break;
            }
        }
@@ -64,7 +65,7 @@ class ClassNotFoundFatalErrorHandlerTest extends TestCase
        }

        $this->assertInstanceOf('Symfony\Component\Debug\Exception\ClassNotFoundException', $exception);
-        $this->assertSame($translatedMessage, $exception->getMessage());
+        $this->assertMatchesRegularExpression($translatedMessage, $exception->getMessage());
        $this->assertSame($error['type'], $exception->getSeverity());
        $this->assertSame($error['file'], $exception->getFile());
        $this->assertSame($error['line'], $exception->getLine());
@@ -79,6 +80,15 @@ class ClassNotFoundFatalErrorHandlerTest extends TestCase
        $debugClassLoader = new DebugClassLoader([$autoloader, 'loadClass']);

        return [
+            [
+                [
+                    'type' => 1,
+                    'line' => 12,
+                    'file' => 'foo.php',
+                    'message' => 'Class "WhizBangFactory" not found',
+                ],
+                "/^Attempted to load class \"WhizBangFactory\" from the global namespace.\nDid you forget a \"use\" statement\?$/",
+            ],
            [
                [
                    'type' => 1,
@@ -86,7 +96,7 @@ class ClassNotFoundFatalErrorHandlerTest extends TestCase
                    'file' => 'foo.php',
                    'message' => 'Class \'WhizBangFactory\' not found',
                ],
-                "Attempted to load class \"WhizBangFactory\" from the global namespace.\nDid you forget a \"use\" statement?",
+                "/^Attempted to load class \"WhizBangFactory\" from the global namespace.\nDid you forget a \"use\" statement\?$/",
            ],
            [
                [
@@ -95,7 +105,34 @@ class ClassNotFoundFatalErrorHandlerTest extends TestCase
                    'file' => 'foo.php',
                    'message' => 'Class \'Foo\\Bar\\WhizBangFactory\' not found',
                ],
-                "Attempted to load class \"WhizBangFactory\" from namespace \"Foo\\Bar\".\nDid you forget a \"use\" statement for another namespace?",
+                "/^Attempted to load class \"WhizBangFactory\" from namespace \"Foo\\\\Bar\".\nDid you forget a \"use\" statement for another namespace\?$/",
+            ],
+            [
+                [
+                    'type' => 1,
+                    'line' => 12,
+                    'file' => 'foo.php',
+                    'message' => 'Class "Foo\\Bar\\WhizBangFactory" not found',
+                ],
+                "/^Attempted to load class \"WhizBangFactory\" from namespace \"Foo\\\\Bar\".\nDid you forget a \"use\" statement for another namespace\?$/",
+            ],
+            [
+                [
+                    'type' => 1,
+                    'line' => 12,
+                    'file' => 'foo.php',
+                    'message' => 'Interface "Foo\\Bar\\WhizBangInterface" not found',
+                ],
+                "/^Attempted to load interface \"WhizBangInterface\" from namespace \"Foo\\\\Bar\".\nDid you forget a \"use\" statement for another namespace\?$/",
+            ],
+            [
+                [
+                    'type' => 1,
+                    'line' => 12,
+                    'file' => 'foo.php',
+                    'message' => 'Trait "Foo\\Bar\\WhizBangTrait" not found',
+                ],
+                "/^Attempted to load trait \"WhizBangTrait\" from namespace \"Foo\\\\Bar\".\nDid you forget a \"use\" statement for another namespace\?$/",
            ],
            [
                [
@@ -104,7 +141,7 @@ class ClassNotFoundFatalErrorHandlerTest extends TestCase
                    'file' => 'foo.php',
                    'message' => 'Class \'UndefinedFunctionException\' not found',
                ],
-                "Attempted to load class \"UndefinedFunctionException\" from the global namespace.\nDid you forget a \"use\" statement for \"Symfony\Component\Debug\Exception\UndefinedFunctionException\"?",
+                "/^Attempted to load class \"UndefinedFunctionException\" from the global namespace.\nDid you forget a \"use\" statement for .*\"Symfony\\\\Component\\\\Debug\\\\Exception\\\\UndefinedFunctionException\"\?$/",
                [$debugClassLoader, 'loadClass'],
            ],
            [
@@ -114,7 +151,7 @@ class ClassNotFoundFatalErrorHandlerTest extends TestCase
                    'file' => 'foo.php',
                    'message' => 'Class \'PEARClass\' not found',
                ],
-                "Attempted to load class \"PEARClass\" from the global namespace.\nDid you forget a \"use\" statement for \"Symfony_Component_Debug_Tests_Fixtures_PEARClass\"?",
+                "/^Attempted to load class \"PEARClass\" from the global namespace.\nDid you forget a \"use\" statement for \"Symfony_Component_Debug_Tests_Fixtures_PEARClass\"\?$/",
                [$debugClassLoader, 'loadClass'],
            ],
            [
@@ -124,7 +161,7 @@ class ClassNotFoundFatalErrorHandlerTest extends TestCase
                    '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\"?",
+                "/^Attempted to load class \"UndefinedFunctionException\" from namespace \"Foo\\\\Bar\".\nDid you forget a \"use\" statement for .*\"Symfony\\\\Component\\\\Debug\\\\Exception\\\\UndefinedFunctionException\"\?$/",
                [$debugClassLoader, 'loadClass'],
            ],
            [
@@ -134,7 +171,7 @@ class ClassNotFoundFatalErrorHandlerTest extends TestCase
                    '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\"?",
+                "/^Attempted to load class \"UndefinedFunctionException\" from namespace \"Foo\\\\Bar\".\nDid you forget a \"use\" statement for \"Symfony\\\\Component\\\\Debug\\\\Exception\\\\UndefinedFunctionException\"\?$/",
                [$autoloader, 'loadClass'],
            ],
            [
@@ -144,7 +181,7 @@ class ClassNotFoundFatalErrorHandlerTest extends TestCase
                    '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\"?",
+                "/^Attempted to load class \"UndefinedFunctionException\" from namespace \"Foo\\\\Bar\".\nDid you forget a \"use\" statement for \"Symfony\\\\Component\\\\Debug\\\\Exception\\\\UndefinedFunctionException\"\?/",
                [$debugClassLoader, 'loadClass'],
            ],
            [
@@ -154,7 +191,7 @@ class ClassNotFoundFatalErrorHandlerTest extends TestCase
                    'file' => 'foo.php',
                    'message' => 'Class \'Foo\\Bar\\UndefinedFunctionException\' not found',
                ],
-                "Attempted to load class \"UndefinedFunctionException\" from namespace \"Foo\\Bar\".\nDid you forget a \"use\" statement for another namespace?",
+                "/^Attempted to load class \"UndefinedFunctionException\" from namespace \"Foo\\\\Bar\".\nDid you forget a \"use\" statement for another namespace\?$/",
                function ($className) { /* do nothing here */ },
            ],
        ];
--- a/Tests/FatalErrorHandler/UndefinedFunctionFatalErrorHandlerTest.php
+++ b/Tests/FatalErrorHandler/UndefinedFunctionFatalErrorHandlerTest.php
@@ -15,9 +15,6 @@ use PHPUnit\Framework\TestCase;
 use Symfony\Component\Debug\Exception\FatalErrorException;
 use Symfony\Component\Debug\FatalErrorHandler\UndefinedFunctionFatalErrorHandler;

-/**
- * @group legacy
- */
 class UndefinedFunctionFatalErrorHandlerTest extends TestCase
 {
    /**
@@ -29,7 +26,7 @@ class UndefinedFunctionFatalErrorHandlerTest extends TestCase
        $exception = $handler->handleError($error, new FatalErrorException('', 0, $error['type'], $error['file'], $error['line']));

        $this->assertInstanceOf('Symfony\Component\Debug\Exception\UndefinedFunctionException', $exception);
-        // class names are case insensitive and PHP do not return the same
+        // 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());
        $this->assertSame($error['file'], $exception->getFile());
--- a/Tests/FatalErrorHandler/UndefinedMethodFatalErrorHandlerTest.php
+++ b/Tests/FatalErrorHandler/UndefinedMethodFatalErrorHandlerTest.php
@@ -15,9 +15,6 @@ use PHPUnit\Framework\TestCase;
 use Symfony\Component\Debug\Exception\FatalErrorException;
 use Symfony\Component\Debug\FatalErrorHandler\UndefinedMethodFatalErrorHandler;

-/**
- * @group legacy
- */
 class UndefinedMethodFatalErrorHandlerTest extends TestCase
 {
    /**
--- a/Tests/Fixtures/AnnotatedClass.php
+++ b/Tests/Fixtures/AnnotatedClass.php
@@ -5,7 +5,7 @@ namespace Symfony\Component\Debug\Tests\Fixtures;
 class AnnotatedClass
 {
    /**
-     * @deprecated
+     * @deprecated since version 3.4.
     */
    public function deprecatedMethod()
    {
--- a/Tests/Fixtures/ClassWithAnnotatedParameters.php
+++ b/Tests/Fixtures/ClassWithAnnotatedParameters.php
@@ -1,34 +0,0 @@
-<?php
-
-namespace Symfony\Component\Debug\Tests\Fixtures;
-
-class ClassWithAnnotatedParameters
-{
-    /**
-     * @param string $foo this is a foo parameter
-     */
-    public function fooMethod(string $foo)
-    {
-    }
-
-    /**
-     * @param string $bar parameter not implemented yet
-     */
-    public function barMethod(/* string $bar = null */)
-    {
-    }
-
-    /**
-     * @param Quz $quz parameter not implemented yet
-     */
-    public function quzMethod(/* Quz $quz = null */)
-    {
-    }
-
-    /**
-     * @param true $yes
-     */
-    public function isSymfony()
-    {
-    }
-}
--- a/Tests/Fixtures/ErrorHandlerThatUsesThePreviousOne.php
+++ b/Tests/Fixtures/ErrorHandlerThatUsesThePreviousOne.php
@@ -15,8 +15,8 @@ class ErrorHandlerThatUsesThePreviousOne
        return $handler;
    }

-    public function handleError($type, $message, $file, $line, $context)
+    public function handleError()
    {
-        return \call_user_func(self::$previous, $type, $message, $file, $line, $context);
+        return \call_user_func_array(self::$previous, \func_get_args());
    }
 }
--- a/Tests/Fixtures/FinalClasses.php
+++ b/Tests/Fixtures/FinalClasses.php
@@ -41,6 +41,7 @@ class FinalClass4
 /**
 * @author John Doe
 *
+ *
 * @final multiline
 * comment
 */
--- a/Tests/Fixtures/FinalMethod.php
+++ b/Tests/Fixtures/FinalMethod.php
@@ -5,7 +5,7 @@ namespace Symfony\Component\Debug\Tests\Fixtures;
 class FinalMethod
 {
    /**
-     * @final
+     * @final since version 3.3.
     */
    public function finalMethod()
    {
--- a/Tests/Fixtures/InterfaceWithAnnotatedParameters.php
+++ b/Tests/Fixtures/InterfaceWithAnnotatedParameters.php
@@ -1,27 +0,0 @@
-<?php
-
-namespace Symfony\Component\Debug\Tests\Fixtures;
-
-/**
- * Ensures a deprecation is triggered when a new parameter is not declared in child classes.
- */
-interface InterfaceWithAnnotatedParameters
-{
-    /**
-     * @param bool $matrix
-     */
-    public function whereAmI();
-
-    /**
-     * @param       $noType
-     * @param callable(\Throwable|null $reason, mixed $value) $callback and a comment
-     * about this great param
-     * @param string                                          $param (comment with $dollar)
-     * @param $defined
-     * @param  callable  ($a,  $b)  $anotherOne
-     * @param callable (mixed $a, $b) $definedCallable
-     * @param Type$WithDollarIsStillAType $ccc
-     * @param \JustAType
-     */
-    public function iAmHere();
-}
--- a/Tests/Fixtures/InternalClass.php
+++ b/Tests/Fixtures/InternalClass.php
@@ -3,7 +3,7 @@
 namespace Symfony\Component\Debug\Tests\Fixtures;

 /**
- * @internal
+ * @internal since version 3.4.
 */
 class InternalClass
 {
--- a/Tests/Fixtures/InternalTrait2.php
+++ b/Tests/Fixtures/InternalTrait2.php
@@ -8,7 +8,7 @@ namespace Symfony\Component\Debug\Tests\Fixtures;
 trait InternalTrait2
 {
    /**
-     * @internal
+     * @internal since version 3.4
     */
    public function internalMethod()
    {
--- a/Tests/Fixtures/LoggerThatSetAnErrorHandler.php
+++ b/Tests/Fixtures/LoggerThatSetAnErrorHandler.php
@@ -6,7 +6,7 @@ use Symfony\Component\Debug\BufferingLogger;

 class LoggerThatSetAnErrorHandler extends BufferingLogger
 {
-    public function log($level, $message, array $context = []): void
+    public function log($level, $message, array $context = [])
    {
        set_error_handler('is_string');
        parent::log($level, $message, $context);
--- a/Tests/Fixtures/SubClassWithAnnotatedParameters.php
+++ b/Tests/Fixtures/SubClassWithAnnotatedParameters.php
@@ -1,32 +0,0 @@
-<?php
-
-namespace Symfony\Component\Debug\Tests\Fixtures;
-
-class SubClassWithAnnotatedParameters extends ClassWithAnnotatedParameters implements InterfaceWithAnnotatedParameters
-{
-    use TraitWithAnnotatedParameters;
-
-    public function fooMethod(string $foo)
-    {
-    }
-
-    public function barMethod($bar = null)
-    {
-    }
-
-    public function quzMethod()
-    {
-    }
-
-    public function whereAmI()
-    {
-    }
-
-    /**
-     * @param                      $defined
-     * @param Type\Does\Not\Matter $definedCallable
-     */
-    public function iAmHere()
-    {
-    }
-}
--- a/Tests/Fixtures/TraitWithAnnotatedParameters.php
+++ b/Tests/Fixtures/TraitWithAnnotatedParameters.php
@@ -1,13 +0,0 @@
-<?php
-
-namespace Symfony\Component\Debug\Tests\Fixtures;
-
-trait TraitWithAnnotatedParameters
-{
-    /**
-     * `@param` annotations in traits are not parsed.
-     */
-    public function isSymfony()
-    {
-    }
-}
--- a/Tests/Fixtures/VirtualClass.php
+++ b/Tests/Fixtures/VirtualClass.php
@@ -1,11 +0,0 @@
-<?php
-
-namespace Symfony\Component\Debug\Tests\Fixtures;
-
-/**
- * @method string classMethod()
- */
-class VirtualClass
-{
-    use VirtualTrait;
-}
--- a/Tests/Fixtures/VirtualClassMagicCall.php
+++ b/Tests/Fixtures/VirtualClassMagicCall.php
@@ -1,18 +0,0 @@
-<?php
-
-namespace Symfony\Component\Debug\Tests\Fixtures;
-
-/**
- * @method string magicMethod()
- * @method static string staticMagicMethod()
- */
-class VirtualClassMagicCall
-{
-    public static function __callStatic($name, $arguments)
-    {
-    }
-
-    public function __call($name, $arguments)
-    {
-    }
-}
--- a/Tests/Fixtures/VirtualInterface.php
+++ b/Tests/Fixtures/VirtualInterface.php
@@ -1,34 +0,0 @@
-<?php
-
-namespace Symfony\Component\Debug\Tests\Fixtures;
-
-/**
- * @method string interfaceMethod()
- * @method        sameLineInterfaceMethod($arg)
- * @method sameLineInterfaceMethodNoBraces
- *
- * Ignored
- * @method
- * @method
- *
- * Not ignored
- * @method newLineInterfaceMethod() Some description!
- * @method \stdClass newLineInterfaceMethodNoBraces Description
- *
- * Invalid
- * @method unknownType invalidInterfaceMethod()
- * @method unknownType|string invalidInterfaceMethodNoBraces
- *
- * Complex
- * @method              complexInterfaceMethod($arg, ...$args)
- * @method string[]|int complexInterfaceMethodTyped($arg, int ...$args) Description ...
- *
- * Static
- * @method static Foo&Bar staticMethod()
- * @method static staticMethodNoBraces
- * @method static \stdClass staticMethodTyped(int $arg) Description
- * @method static \stdClass[] staticMethodTypedNoBraces
- */
-interface VirtualInterface
-{
-}
--- a/Tests/Fixtures/VirtualSubInterface.php
+++ b/Tests/Fixtures/VirtualSubInterface.php
@@ -1,10 +0,0 @@
-<?php
-
-namespace Symfony\Component\Debug\Tests\Fixtures;
-
-/**
- * @method string subInterfaceMethod()
- */
-interface VirtualSubInterface extends VirtualInterface
-{
-}
--- a/Tests/Fixtures/VirtualTrait.php
+++ b/Tests/Fixtures/VirtualTrait.php
@@ -1,10 +0,0 @@
-<?php
-
-namespace Symfony\Component\Debug\Tests\Fixtures;
-
-/**
- * @method string traitMethod()
- */
-trait VirtualTrait
-{
-}
--- a/Tests/phpt/debug_class_loader.phpt
+++ b/Tests/phpt/debug_class_loader.phpt
@@ -23,6 +23,5 @@ class_exists(ExtendedFinalMethod::class);

 ?>
 --EXPECTF--
-%A
-The "Symfony\Component\Debug\Tests\Fixtures\FinalMethod::finalMethod()" method is considered final. It may change without further notice as of its next major version. You should not extend it from "Symfony\Component\Debug\Tests\Fixtures\ExtendedFinalMethod".
+The "Symfony\Component\Debug\Tests\Fixtures\FinalMethod::finalMethod()" method is considered final since version 3.3. It may change without further notice as of its next major version. You should not extend it from "Symfony\Component\Debug\Tests\Fixtures\ExtendedFinalMethod".
 The "Symfony\Component\Debug\Tests\Fixtures\FinalMethod::finalMethod2()" method is considered final. It may change without further notice as of its next major version. You should not extend it from "Symfony\Component\Debug\Tests\Fixtures\ExtendedFinalMethod".
--- a/Tests/phpt/decorate_exception_hander.phpt
+++ b/Tests/phpt/decorate_exception_hander.phpt
@@ -26,7 +26,6 @@ if (true) {

 ?>
 --EXPECTF--
-%A
 object(Symfony\Component\Debug\Exception\ClassNotFoundException)#%d (8) {
  ["message":protected]=>
  string(131) "Attempted to load class "missing" from namespace "Symfony\Component\Debug".
--- a/Tests/phpt/fatal_with_nested_handlers.phpt
+++ b/Tests/phpt/fatal_with_nested_handlers.phpt
@@ -24,7 +24,7 @@ var_dump([
 $eHandler[0]->setExceptionHandler('print_r');

 if (true) {
-    class Broken implements \JsonSerializable
+    class Broken implements \Serializable
    {
    }
 }
@@ -35,9 +35,8 @@ array(1) {
  [0]=>
  string(37) "Error and exception handlers do match"
 }
-%A
 object(Symfony\Component\Debug\Exception\FatalErrorException)#%d (%d) {
  ["message":protected]=>
-  string(179) "Error: Class Symfony\Component\Debug\Broken contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (JsonSerializable::jsonSerialize)"
+  string(199) "Error: Class Symfony\Component\Debug\Broken contains 2 abstract methods and must therefore be declared abstract or implement the remaining methods (Serializable::serialize, Serializable::unserialize)"
 %a
 }
--- a/composer.json
+++ b/composer.json
@@ -16,14 +16,14 @@
        }
    ],
    "require": {
-        "php": "^7.1.3",
+        "php": "^5.5.9|>=7.0.8",
        "psr/log": "~1.0"
    },
    "conflict": {
-        "symfony/http-kernel": "<3.4"
+        "symfony/http-kernel": ">=2.3,<2.3.24|~2.4.0|>=2.5,<2.5.9|>=2.6,<2.6.2"
    },
    "require-dev": {
-        "symfony/http-kernel": "^3.4|^4.0|^5.0"
+        "symfony/http-kernel": "~2.8|~3.0|~4.0"
    },
    "autoload": {
        "psr-4": { "Symfony\\Component\\Debug\\": "" },
@@ -31,10 +31,5 @@
            "/Tests/"
        ]
    },
-    "minimum-stability": "dev",
-    "extra": {
-        "branch-alias": {
-            "dev-master": "4.4-dev"
-        }
-    }
+    "minimum-stability": "dev"
 }
Author	SHA1	Message	Date
Nicolas Grekas	ab42889de5	Remove branch-version (keep them for contracts only)	2020-10-24 12:57:07 +02:00
Nicolas Grekas	bfcf449c91	Fix branch-version	2020-10-13 15:20:16 +02:00
Nicolas Grekas	90c931ffd0	Remove "version" from composer.json files, use "branch-version" instead	2020-10-13 14:21:16 +02:00
Nicolas Grekas	34a8785ac1	Update versions in composer.json	2020-10-06 17:25:25 +02:00
Nicolas Grekas	0a7f96d51e	Remove "branch-alias", populate "version"	2020-10-06 13:22:52 +02:00
Alexander M. Turek	9109e4414e	[Debug] Skip a test that was meant for HHVM.	2020-09-09 00:19:14 +02:00
Alexander M. Turek	5422b88cf9	[Debug] Parse "x not found" errors correctly on php 8.	2020-09-04 00:12:04 +02:00
Nicolas Grekas	093e4e512f	Enable "native_constant_invocation" CS rule	2020-09-02 18:06:40 +02:00
Alexander M. Turek	0893a0b07c	Modernized deprecated PHPUnit assertion calls	2020-08-09 10:13:48 +02:00
Thomas Calvet	7ce874f443	[SCA] Minor fixes on tests	2020-07-16 11:41:49 +02:00
Nicolas Grekas	f34d2bf035	[ErrorHandler] fix throwing from __toString()	2020-06-30 19:28:29 +02:00
Nicolas Grekas	518c6a00d0	minor #36898 [Debug] php 8 does not pass $context to error handlers (derrabus) This PR was merged into the 3.4 branch. Discussion ---------- [Debug] php 8 does not pass $context to error handlers \| Q \| A \| ------------- \| --- \| Branch? \| 3.4 \| Bug fix? \| yes \| New feature? \| no \| Deprecations? \| no \| Tickets \| #36872 \| License \| MIT \| Doc PR \| N/A php 8 will call error handlers without the optional `$context` parameter. Thus, error handlers that make that parameter mandatory will break. Commits ------- 593897c9e1 [Debug] php 8 does not pass $context to error handlers.	2020-05-22 20:25:20 +02:00
Alexander M. Turek	2560754c36	[Debug] php 8 does not pass $context to error handlers.	2020-05-22 13:12:29 +02:00
Alexander M. Turek	44897cd605	[Debug] Undefined variables raise a warning in php 8.	2020-05-22 12:23:23 +02:00
Alexander M. Turek	7e9cd457b4	[Debug] Skip test that would trigger a fatal error on php 8.	2020-05-21 16:02:48 +02:00
Nicolas Grekas	ce9f3b5e8e	[Debug] fix for PHP 7.3.16+/7.4.4+	2020-03-23 11:22:40 +01:00
Fabien Potencier	ed3231ef38	Add missing dots at the end of exception messages	2020-03-15 10:38:08 +01:00
Wouter de Jong	a99278d50a	[Translation][Debug] Add installation and minimal example to README	2020-02-03 16:10:40 +01:00
Nicolas Grekas	70dd18e93b	[Debug] fix ClassNotFoundFatalErrorHandler	2020-01-08 17:36:15 +01:00
Shaharia Azam	9a81b6360b	Update links to documentation	2020-01-04 13:05:51 +01:00
Jan Rosier	cbe127b719	Update year in license files	2020-01-01 12:03:25 +01:00
Artem Henvald	9d32af2d83	Use `::class` constants instead of `__NAMESPACE__` when possible	2019-12-16 11:25:54 +01:00