bug #28437 [VarExporter] fix more edge cases (nicolas-grekas)

This PR was merged into the 4.2-dev branch. Discussion ---------- [VarExporter] fix more edge cases | Q | A | ------------- | --- | Branch? | master | Bug fix? | yes | New feature? | no | BC breaks? | no | Deprecations? | no | Tests pass? | yes | Fixed tickets | - | License | MIT | Doc PR | - As found while preparing #28417 Commits ------- 443bd119b1 [VarExporter] fix more edge cases
2018-09-11 10:47:39 +02:00 · 2018-09-11 10:47:39 +02:00 · 2879baf3bd
commit 2879baf3bd
parent deae538245 443bd119b1
17 changed files with 100 additions and 69 deletions
--- a/src/Symfony/Component/VarExporter/Internal/Exporter.php
+++ b/src/Symfony/Component/VarExporter/Internal/Exporter.php
@ -77,19 +77,7 @@ class Exporter
            $properties = array();
            $sleep = null;
            $arrayValue = (array) $value;
-
-            if (!isset(Registry::$reflectors[$class])) {
-                Registry::getClassReflector($class);
-                try {
-                    serialize(Registry::$prototypes[$class]);
-                } catch (\Exception $e) {
-                    throw new NotInstantiableTypeException($class, $e);
-                }
-                if (\method_exists($class, '__sleep')) {
-                    Registry::getClassReflector($class, Registry::$instantiableWithoutConstructor[$class], Registry::$cloneable[$class]);
-                }
-            }
-            $reflector = Registry::$reflectors[$class];
+            $reflector = Registry::$reflectors[$class] ?? Registry::getClassReflector($class);
            $proto = Registry::$prototypes[$class];

            if (($value instanceof \ArrayIterator || $value instanceof \ArrayObject) && null !== $proto) {
@ -133,7 +121,7 @@ class Exporter
            foreach ($arrayValue as $name => $v) {
                $n = (string) $name;
                if ('' === $n || "\0" !== $n[0]) {
-                    $c = '*';
+                    $c = 'stdClass';
                    $properties[$c][$n] = $v;
                    unset($sleep[$n]);
                } elseif ('*' === $n[1]) {
@ -305,7 +293,7 @@ class Exporter
            $code .= $subIndent.(1 !== $k - $j ? $k.' => ' : '');
            $j = $k;
            $eol = ",\n";
-            $c = '[\\'.$class.'::class]';
+            $c = '['.self::export($class).']';

            if ($seen[$class] ?? false) {
                if (Registry::$cloneable[$class]) {
@ -351,8 +339,7 @@ class Exporter
    {
        $code = '';
        foreach ($value->properties as $class => $properties) {
-            $c = '*' !== $class ? '\\'.$class.'::class' : "'*'";
-            $code .= $subIndent.'    '.$c.' => '.self::export($properties, $subIndent.'    ').",\n";
+            $code .= $subIndent.'    '.self::export($class).' => '.self::export($properties, $subIndent.'    ').",\n";
        }

        $code = array(
--- a/src/Symfony/Component/VarExporter/Internal/Hydrator.php
+++ b/src/Symfony/Component/VarExporter/Internal/Hydrator.php
@ -49,7 +49,7 @@ class Hydrator

    public static function getHydrator($class)
    {
-        if ('*' === $class) {
+        if ('stdClass' === $class) {
            return self::$hydrators[$class] = static function ($properties, $objects) {
                foreach ($properties as $name => $values) {
                    foreach ($values as $i => $v) {
@ -62,13 +62,17 @@ class Hydrator
        $classReflector = Registry::$reflectors[$class] ?? Registry::getClassReflector($class);

        if (!$classReflector->isInternal()) {
-            return self::$hydrators[$class] = (self::$hydrators['*'] ?? self::getHydrator('*'))->bindTo(null, $class);
+            return self::$hydrators[$class] = (self::$hydrators['stdClass'] ?? self::getHydrator('stdClass'))->bindTo(null, $class);
+        }
+
+        if ($classReflector->name !== $class) {
+            return self::$hydrators[$classReflector->name] ?? self::getHydrator($classReflector->name);
        }

        switch ($class) {
            case 'ArrayIterator':
            case 'ArrayObject':
-                $constructor = $classReflector->getConstructor();
+                $constructor = \Closure::fromCallable(array($classReflector->getConstructor(), 'invokeArgs'));

                return self::$hydrators[$class] = static function ($properties, $objects) use ($constructor) {
                    foreach ($properties as $name => $values) {
@ -78,17 +82,17 @@ class Hydrator
                            }
                        }
                    }
-                    foreach ($properties["\0"] as $i => $v) {
-                        $constructor->invokeArgs($objects[$i], $v);
+                    foreach ($properties["\0"] ?? array() as $i => $v) {
+                        $constructor($objects[$i], $v);
                    }
                };

            case 'ErrorException':
-                return self::$hydrators[$class] = (self::$hydrators['*'] ?? self::getHydrator('*'))->bindTo(null, new class() extends \ErrorException {
+                return self::$hydrators[$class] = (self::$hydrators['stdClass'] ?? self::getHydrator('stdClass'))->bindTo(null, new class() extends \ErrorException {
                });

            case 'TypeError':
-                return self::$hydrators[$class] = (self::$hydrators['*'] ?? self::getHydrator('*'))->bindTo(null, new class() extends \Error {
+                return self::$hydrators[$class] = (self::$hydrators['stdClass'] ?? self::getHydrator('stdClass'))->bindTo(null, new class() extends \Error {
                });

            case 'SplObjectStorage':
@ -109,19 +113,28 @@ class Hydrator
                };
        }

-        $propertyReflectors = array();
+        $propertySetters = array();
        foreach ($classReflector->getProperties() as $propertyReflector) {
            if (!$propertyReflector->isStatic()) {
                $propertyReflector->setAccessible(true);
-                $propertyReflectors[$propertyReflector->name] = $propertyReflector;
+                $propertySetters[$propertyReflector->name] = \Closure::fromCallable(array($propertyReflector, 'setValue'));
            }
        }

-        return self::$hydrators[$class] = static function ($properties, $objects) use ($propertyReflectors) {
+        if (!$propertySetters) {
+            return self::$hydrators[$class] = self::$hydrators['stdClass'] ?? self::getHydrator('stdClass');
+        }
+
+        return self::$hydrators[$class] = static function ($properties, $objects) use ($propertySetters) {
            foreach ($properties as $name => $values) {
-                $p = $propertyReflectors[$name];
+                if ($setValue = $propertySetters[$name] ?? null) {
+                    foreach ($values as $i => $v) {
+                        $setValue($objects[$i], $v);
+                    }
+                    continue;
+                }
                foreach ($values as $i => $v) {
-                    $p->setValue($objects[$i], $v);
+                    $objects[$i]->$name = $v;
                }
            }
        };
--- a/src/Symfony/Component/VarExporter/Internal/Registry.php
+++ b/src/Symfony/Component/VarExporter/Internal/Registry.php
@ -65,17 +65,26 @@ class Registry

    public static function getClassReflector($class, $instantiableWithoutConstructor = false, $cloneable = null)
    {
-        if (!\class_exists($class)) {
+        if (!\class_exists($class) && !\interface_exists($class, false) && !\trait_exists($class, false)) {
            throw new ClassNotFoundException($class);
        }
        $reflector = new \ReflectionClass($class);

-        if (self::$instantiableWithoutConstructor[$class] = $instantiableWithoutConstructor || !$reflector->isFinal()) {
+        if ($instantiableWithoutConstructor) {
            $proto = $reflector->newInstanceWithoutConstructor();
+        } elseif (!$reflector->isInstantiable()) {
+            throw new NotInstantiableTypeException($class);
+        } elseif ($reflector->name !== $class) {
+            $reflector = self::$reflectors[$name = $reflector->name] ?? self::getClassReflector($name, $instantiableWithoutConstructor, $cloneable);
+            self::$cloneable[$class] = self::$cloneable[$name];
+            self::$instantiableWithoutConstructor[$class] = self::$instantiableWithoutConstructor[$name];
+            self::$prototypes[$class] = self::$prototypes[$name];
+
+            return self::$reflectors[$class] = $reflector;
        } else {
            try {
                $proto = $reflector->newInstanceWithoutConstructor();
-                self::$instantiableWithoutConstructor[$class] = true;
+                $instantiableWithoutConstructor = true;
            } catch (\ReflectionException $e) {
                $proto = $reflector->implementsInterface('Serializable') ? 'C:' : 'O:';
                if ('C:' === $proto && !$reflector->getMethod('unserialize')->isInternal()) {
@ -84,31 +93,48 @@ class Registry
                    throw new NotInstantiableTypeException($class);
                }
            }
+            if (null !== $proto && !$proto instanceof \Throwable) {
+                try {
+                    if (!$proto instanceof \Serializable && !\method_exists($class, '__sleep')) {
+                        serialize($proto);
+                    } elseif ($instantiableWithoutConstructor) {
+                        serialize($reflector->newInstanceWithoutConstructor());
+                    } else {
+                        serialize(unserialize(($proto instanceof \Serializable ? 'C:' : 'O:').\strlen($class).':"'.$class.'":0:{}'));
+                    }
+                } catch (\Exception $e) {
+                    throw new NotInstantiableTypeException($class, $e);
+                }
+            }
        }

-        if (null === self::$cloneable[$class] = $cloneable) {
+        if (null === $cloneable) {
            if (($proto instanceof \Reflector || $proto instanceof \ReflectionGenerator || $proto instanceof \ReflectionType || $proto instanceof \IteratorIterator || $proto instanceof \RecursiveIteratorIterator) && (!$proto instanceof \Serializable && !\method_exists($proto, '__wakeup'))) {
                throw new NotInstantiableTypeException($class);
            }

-            self::$cloneable[$class] = $reflector->isCloneable() && !$reflector->hasMethod('__clone');
+            $cloneable = $reflector->isCloneable() && !$reflector->hasMethod('__clone');
        }

+        self::$cloneable[$class] = $cloneable;
+        self::$instantiableWithoutConstructor[$class] = $instantiableWithoutConstructor;
        self::$prototypes[$class] = $proto;

        if ($proto instanceof \Throwable) {
-            static $trace;
+            static $setTrace;

-            if (null === $trace) {
-                $trace = array(
+            if (null === $setTrace) {
+                $setTrace = array(
                    new \ReflectionProperty(\Error::class, 'trace'),
                    new \ReflectionProperty(\Exception::class, 'trace'),
                );
-                $trace[0]->setAccessible(true);
-                $trace[1]->setAccessible(true);
+                $setTrace[0]->setAccessible(true);
+                $setTrace[1]->setAccessible(true);
+                $setTrace[0] = \Closure::fromCallable(array($setTrace[0], 'setValue'));
+                $setTrace[1] = \Closure::fromCallable(array($setTrace[1], 'setValue'));
            }

-            $trace[$proto instanceof \Exception]->setValue($proto, array());
+            $setTrace[$proto instanceof \Exception]($proto, array());
        }

        return self::$reflectors[$class] = $reflector;
--- a/src/Symfony/Component/VarExporter/Tests/Fixtures/array-iterator.php
+++ b/src/Symfony/Component/VarExporter/Tests/Fixtures/array-iterator.php
@ -2,11 +2,11 @@

 return \Symfony\Component\VarExporter\Internal\Hydrator::hydrate(
    $o = [
-        clone (\Symfony\Component\VarExporter\Internal\Registry::$prototypes[\ArrayIterator::class] ?? \Symfony\Component\VarExporter\Internal\Registry::p(\ArrayIterator::class)),
+        clone (\Symfony\Component\VarExporter\Internal\Registry::$prototypes['ArrayIterator'] ?? \Symfony\Component\VarExporter\Internal\Registry::p('ArrayIterator')),
    ],
    null,
    [
-        \ArrayIterator::class => [
+        'ArrayIterator' => [
            "\0" => [
                [
                    [
--- a/src/Symfony/Component/VarExporter/Tests/Fixtures/array-object-custom.php
+++ b/src/Symfony/Component/VarExporter/Tests/Fixtures/array-object-custom.php
@ -2,11 +2,11 @@

 return \Symfony\Component\VarExporter\Internal\Hydrator::hydrate(
    $o = [
-        clone (\Symfony\Component\VarExporter\Internal\Registry::$prototypes[\Symfony\Component\VarExporter\Tests\MyArrayObject::class] ?? \Symfony\Component\VarExporter\Internal\Registry::p(\Symfony\Component\VarExporter\Tests\MyArrayObject::class)),
+        clone (\Symfony\Component\VarExporter\Internal\Registry::$prototypes['Symfony\\Component\\VarExporter\\Tests\\MyArrayObject'] ?? \Symfony\Component\VarExporter\Internal\Registry::p('Symfony\\Component\\VarExporter\\Tests\\MyArrayObject')),
    ],
    null,
    [
-        \ArrayObject::class => [
+        'ArrayObject' => [
            "\0" => [
                [
                    [
--- a/src/Symfony/Component/VarExporter/Tests/Fixtures/array-object.php
+++ b/src/Symfony/Component/VarExporter/Tests/Fixtures/array-object.php
@ -2,12 +2,12 @@

 return \Symfony\Component\VarExporter\Internal\Hydrator::hydrate(
    $o = [
-        clone (($p = &\Symfony\Component\VarExporter\Internal\Registry::$prototypes)[\ArrayObject::class] ?? \Symfony\Component\VarExporter\Internal\Registry::p(\ArrayObject::class)),
-        clone $p[\ArrayObject::class],
+        clone (($p = &\Symfony\Component\VarExporter\Internal\Registry::$prototypes)['ArrayObject'] ?? \Symfony\Component\VarExporter\Internal\Registry::p('ArrayObject')),
+        clone $p['ArrayObject'],
    ],
    null,
    [
-        \ArrayObject::class => [
+        'ArrayObject' => [
            "\0" => [
                [
                    [
@ -18,7 +18,7 @@ return \Symfony\Component\VarExporter\Internal\Hydrator::hydrate(
                ],
            ],
        ],
-        '*' => [
+        'stdClass' => [
            'foo' => [
                $o[1],
            ],
--- a/src/Symfony/Component/VarExporter/Tests/Fixtures/clone.php
+++ b/src/Symfony/Component/VarExporter/Tests/Fixtures/clone.php
@ -2,8 +2,8 @@

 return \Symfony\Component\VarExporter\Internal\Hydrator::hydrate(
    $o = [
-        (($f = &\Symfony\Component\VarExporter\Internal\Registry::$factories)[\Symfony\Component\VarExporter\Tests\MyCloneable::class] ?? \Symfony\Component\VarExporter\Internal\Registry::f(\Symfony\Component\VarExporter\Tests\MyCloneable::class))(),
-        ($f[\Symfony\Component\VarExporter\Tests\MyNotCloneable::class] ?? \Symfony\Component\VarExporter\Internal\Registry::f(\Symfony\Component\VarExporter\Tests\MyNotCloneable::class))(),
+        (($f = &\Symfony\Component\VarExporter\Internal\Registry::$factories)['Symfony\\Component\\VarExporter\\Tests\\MyCloneable'] ?? \Symfony\Component\VarExporter\Internal\Registry::f('Symfony\\Component\\VarExporter\\Tests\\MyCloneable'))(),
+        ($f['Symfony\\Component\\VarExporter\\Tests\\MyNotCloneable'] ?? \Symfony\Component\VarExporter\Internal\Registry::f('Symfony\\Component\\VarExporter\\Tests\\MyNotCloneable'))(),
    ],
    null,
    [],
--- a/src/Symfony/Component/VarExporter/Tests/Fixtures/datetime.php
+++ b/src/Symfony/Component/VarExporter/Tests/Fixtures/datetime.php
@ -2,11 +2,11 @@

 return \Symfony\Component\VarExporter\Internal\Hydrator::hydrate(
    $o = [
-        clone (\Symfony\Component\VarExporter\Internal\Registry::$prototypes[\DateTime::class] ?? \Symfony\Component\VarExporter\Internal\Registry::p(\DateTime::class)),
+        clone (\Symfony\Component\VarExporter\Internal\Registry::$prototypes['DateTime'] ?? \Symfony\Component\VarExporter\Internal\Registry::p('DateTime')),
    ],
    null,
    [
-        '*' => [
+        'stdClass' => [
            'date' => [
                '1970-01-01 00:00:00.000000',
            ],
--- a/src/Symfony/Component/VarExporter/Tests/Fixtures/error.php
+++ b/src/Symfony/Component/VarExporter/Tests/Fixtures/error.php
@ -2,11 +2,11 @@

 return \Symfony\Component\VarExporter\Internal\Hydrator::hydrate(
    $o = [
-        (\Symfony\Component\VarExporter\Internal\Registry::$factories[\Error::class] ?? \Symfony\Component\VarExporter\Internal\Registry::f(\Error::class))(),
+        (\Symfony\Component\VarExporter\Internal\Registry::$factories['Error'] ?? \Symfony\Component\VarExporter\Internal\Registry::f('Error'))(),
    ],
    null,
    [
-        \TypeError::class => [
+        'TypeError' => [
            'file' => [
                \dirname(__DIR__).\DIRECTORY_SEPARATOR.'VarExporterTest.php',
            ],
@ -14,7 +14,7 @@ return \Symfony\Component\VarExporter\Internal\Hydrator::hydrate(
                234,
            ],
        ],
-        \Error::class => [
+        'Error' => [
            'trace' => [
                [
                    'file' => \dirname(__DIR__).\DIRECTORY_SEPARATOR.'VarExporterTest.php',
--- a/src/Symfony/Component/VarExporter/Tests/Fixtures/final-error.php
+++ b/src/Symfony/Component/VarExporter/Tests/Fixtures/final-error.php
@ -6,7 +6,7 @@ return \Symfony\Component\VarExporter\Internal\Hydrator::hydrate(
    ]),
    null,
    [
-        \TypeError::class => [
+        'TypeError' => [
            'file' => [
                \dirname(__DIR__).\DIRECTORY_SEPARATOR.'VarExporterTest.php',
            ],
--- a/src/Symfony/Component/VarExporter/Tests/Fixtures/final-stdclass.php
+++ b/src/Symfony/Component/VarExporter/Tests/Fixtures/final-stdclass.php
@ -2,7 +2,7 @@

 return \Symfony\Component\VarExporter\Internal\Hydrator::hydrate(
    $o = [
-        (\Symfony\Component\VarExporter\Internal\Registry::$factories[\Symfony\Component\VarExporter\Tests\FinalStdClass::class] ?? \Symfony\Component\VarExporter\Internal\Registry::f(\Symfony\Component\VarExporter\Tests\FinalStdClass::class))(),
+        (\Symfony\Component\VarExporter\Internal\Registry::$factories['Symfony\\Component\\VarExporter\\Tests\\FinalStdClass'] ?? \Symfony\Component\VarExporter\Internal\Registry::f('Symfony\\Component\\VarExporter\\Tests\\FinalStdClass'))(),
    ],
    null,
    [],
--- a/src/Symfony/Component/VarExporter/Tests/Fixtures/hard-references.php
+++ b/src/Symfony/Component/VarExporter/Tests/Fixtures/hard-references.php
@ -2,7 +2,7 @@

 return \Symfony\Component\VarExporter\Internal\Hydrator::hydrate(
    $o = [
-        clone (\Symfony\Component\VarExporter\Internal\Registry::$prototypes[\stdClass::class] ?? \Symfony\Component\VarExporter\Internal\Registry::p(\stdClass::class)),
+        clone (\Symfony\Component\VarExporter\Internal\Registry::$prototypes['stdClass'] ?? \Symfony\Component\VarExporter\Internal\Registry::p('stdClass')),
    ],
    [
        $r = [],
--- a/src/Symfony/Component/VarExporter/Tests/Fixtures/private.php
+++ b/src/Symfony/Component/VarExporter/Tests/Fixtures/private.php
@ -2,12 +2,12 @@

 return \Symfony\Component\VarExporter\Internal\Hydrator::hydrate(
    $o = [
-        clone (($p = &\Symfony\Component\VarExporter\Internal\Registry::$prototypes)[\Symfony\Component\VarExporter\Tests\MyPrivateValue::class] ?? \Symfony\Component\VarExporter\Internal\Registry::p(\Symfony\Component\VarExporter\Tests\MyPrivateValue::class)),
-        clone ($p[\Symfony\Component\VarExporter\Tests\MyPrivateChildValue::class] ?? \Symfony\Component\VarExporter\Internal\Registry::p(\Symfony\Component\VarExporter\Tests\MyPrivateChildValue::class)),
+        clone (($p = &\Symfony\Component\VarExporter\Internal\Registry::$prototypes)['Symfony\\Component\\VarExporter\\Tests\\MyPrivateValue'] ?? \Symfony\Component\VarExporter\Internal\Registry::p('Symfony\\Component\\VarExporter\\Tests\\MyPrivateValue')),
+        clone ($p['Symfony\\Component\\VarExporter\\Tests\\MyPrivateChildValue'] ?? \Symfony\Component\VarExporter\Internal\Registry::p('Symfony\\Component\\VarExporter\\Tests\\MyPrivateChildValue')),
    ],
    null,
    [
-        \Symfony\Component\VarExporter\Tests\MyPrivateValue::class => [
+        'Symfony\\Component\\VarExporter\\Tests\\MyPrivateValue' => [
            'prot' => [
                123,
                123,
--- a/src/Symfony/Component/VarExporter/Tests/Fixtures/spl-object-storage.php
+++ b/src/Symfony/Component/VarExporter/Tests/Fixtures/spl-object-storage.php
@ -2,12 +2,12 @@

 return \Symfony\Component\VarExporter\Internal\Hydrator::hydrate(
    $o = [
-        clone (($p = &\Symfony\Component\VarExporter\Internal\Registry::$prototypes)[\SplObjectStorage::class] ?? \Symfony\Component\VarExporter\Internal\Registry::p(\SplObjectStorage::class)),
-        clone ($p[\stdClass::class] ?? \Symfony\Component\VarExporter\Internal\Registry::p(\stdClass::class)),
+        clone (($p = &\Symfony\Component\VarExporter\Internal\Registry::$prototypes)['SplObjectStorage'] ?? \Symfony\Component\VarExporter\Internal\Registry::p('SplObjectStorage')),
+        clone ($p['stdClass'] ?? \Symfony\Component\VarExporter\Internal\Registry::p('stdClass')),
    ],
    null,
    [
-        \SplObjectStorage::class => [
+        'SplObjectStorage' => [
            "\0" => [
                [
                    $o[1],
--- a/src/Symfony/Component/VarExporter/Tests/Fixtures/var-on-sleep.php
+++ b/src/Symfony/Component/VarExporter/Tests/Fixtures/var-on-sleep.php
@ -2,11 +2,11 @@

 return \Symfony\Component\VarExporter\Internal\Hydrator::hydrate(
    $o = [
-        clone (\Symfony\Component\VarExporter\Internal\Registry::$prototypes[\Symfony\Component\VarExporter\Tests\GoodNight::class] ?? \Symfony\Component\VarExporter\Internal\Registry::p(\Symfony\Component\VarExporter\Tests\GoodNight::class)),
+        clone (\Symfony\Component\VarExporter\Internal\Registry::$prototypes['Symfony\\Component\\VarExporter\\Tests\\GoodNight'] ?? \Symfony\Component\VarExporter\Internal\Registry::p('Symfony\\Component\\VarExporter\\Tests\\GoodNight')),
    ],
    null,
    [
-        '*' => [
+        'stdClass' => [
            'good' => [
                'night',
            ],
--- a/src/Symfony/Component/VarExporter/Tests/Fixtures/wakeup.php
+++ b/src/Symfony/Component/VarExporter/Tests/Fixtures/wakeup.php
@ -2,12 +2,12 @@

 return \Symfony\Component\VarExporter\Internal\Hydrator::hydrate(
    $o = [
-        clone (($p = &\Symfony\Component\VarExporter\Internal\Registry::$prototypes)[\Symfony\Component\VarExporter\Tests\MyWakeup::class] ?? \Symfony\Component\VarExporter\Internal\Registry::p(\Symfony\Component\VarExporter\Tests\MyWakeup::class)),
-        clone $p[\Symfony\Component\VarExporter\Tests\MyWakeup::class],
+        clone (($p = &\Symfony\Component\VarExporter\Internal\Registry::$prototypes)['Symfony\\Component\\VarExporter\\Tests\\MyWakeup'] ?? \Symfony\Component\VarExporter\Internal\Registry::p('Symfony\\Component\\VarExporter\\Tests\\MyWakeup')),
+        clone $p['Symfony\\Component\\VarExporter\\Tests\\MyWakeup'],
    ],
    null,
    [
-        '*' => [
+        'stdClass' => [
            'sub' => [
                $o[1],
                123,
--- a/src/Symfony/Component/VarExporter/Tests/VarExporterTest.php
+++ b/src/Symfony/Component/VarExporter/Tests/VarExporterTest.php
@ -61,6 +61,11 @@ class VarExporterTest extends TestCase
        yield array($h = fopen(__FILE__, 'r'));
        yield array(array($h));

+        $a = new class() {
+        };
+
+        yield array($a);
+
        $a = array(null, $h);
        $a[0] = &$a;