fix: return property names in AbstractSqlExecutor::__sleep

Property names as returned by a cast to array are mangled, and that
mangling is not documented. Returning unprefixed produces the same
result, and is more likely to be supported by external tools relying on
the documented possible return values of __sleep.

For instance symfony/var-exporter does not support mangled names, which
leads to issues when caching query parsing results in Symfony
applications.

lib/Doctrine/ORM/Query/Exec/AbstractSqlExecutor.php

@@ -11,7 +11,9 @@
 
 use function array_diff;
 use function array_keys;
+use function array_map;
 use function array_values;
+use function str_replace;
 
 /**
  * Base class for SQL statement executors.
@@ -84,7 +86,9 @@ public function __sleep(): array
              serialized representation becomes compatible with 3.0.x, meaning
              there will not be a deprecation warning about a missing property
              when unserializing data */
-        return array_values(array_diff(array_keys((array) $this), ["\0*\0_sqlStatements"]));
+        return array_values(array_diff(array_map(static function (string $prop): string {
+            return str_replace("\0*\0", '', $prop);
+        }, array_keys((array) $this)), ['_sqlStatements']));
     }
 
     public function __wakeup(): void

tests/Doctrine/Tests/ORM/Functional/ParserResultSerializationTest.php

@@ -4,6 +4,7 @@
 
 namespace Doctrine\Tests\ORM\Functional;
 
+use Closure;
 use Doctrine\ORM\Query;
 use Doctrine\ORM\Query\Exec\SingleSelectExecutor;
 use Doctrine\ORM\Query\ParserResult;
@@ -12,6 +13,7 @@
 use Generator;
 use ReflectionMethod;
 use ReflectionProperty;
+use Symfony\Component\VarExporter\VarExporter;
 
 use function file_get_contents;
 use function rtrim;
@@ -27,21 +29,41 @@ protected function setUp(): void
         parent::setUp();
     }
 
-    public function testSerializeParserResult(): void
+    /**
+     * @param Closure(ParserResult): ParserResult $toSerializedAndBack
+     *
+     * @dataProvider provideToSerializedAndBack
+     */
+    public function testSerializeParserResult(Closure $toSerializedAndBack): void
     {
         $query = $this->_em
             ->createQuery('SELECT u FROM Doctrine\Tests\Models\Company\CompanyEmployee u WHERE u.name = :name');
 
         $parserResult = self::parseQuery($query);
-        $serialized   = serialize($parserResult);
-        $unserialized = unserialize($serialized);
+        $unserialized = $toSerializedAndBack($parserResult);
 
         $this->assertInstanceOf(ParserResult::class, $unserialized);
         $this->assertInstanceOf(ResultSetMapping::class, $unserialized->getResultSetMapping());
         $this->assertEquals(['name' => [0]], $unserialized->getParameterMappings());
         $this->assertInstanceOf(SingleSelectExecutor::class, $unserialized->getSqlExecutor());
     }
 
+    /** @return Generator<string, array{Closure(ParserResult): ParserResult}> */
+    public function provideToSerializedAndBack(): Generator
+    {
+        yield 'native serialization function' => [
+            static function (ParserResult $parserResult): ParserResult {
+                return unserialize(serialize($parserResult));
+            },
+        ];
+
+        yield 'symfony/var-exporter' => [
+            static function (ParserResult $parserResult): ParserResult {
+                return eval('return ' . VarExporter::export($parserResult) . ';');
+            },
+        ];
+    }
+
     public function testItSerializesParserResultWithAForwardCompatibleFormat(): void
     {
         $query = $this->_em