Bug #66350 [NEW]: Custom statement class parameters can cause memory (connection) leak

From: sea128 at post dot cz Operating system: PHP version: 5.5.7 Package: PDO related Bug Type: Bug Bug description:Custom statement class parameters can cause memory (connection) leak Description: ------------ Setting statement class with PDO object as parameter causes cyclic reference which prevent from garbage collection. Test script: --------------- // it is not sqlite bug, similar problem is with postgresql $db = new PDO('sqlite::memory:'); // this line will prevent from garbage collection $db->setAttribute(PDO::ATTR_STATEMENT_CLASS, array('PDOStatement', array($db))); // this line will not close connection unset($db); // this line will not close connection too gc_collect_cycles(); -- Edit bug report at https://bugs.php.net/bug.php?id=66350&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=66350&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=66350&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=66350&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=66350&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=66350&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=66350&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=66350&r=needscript Try newer version: https://bugs.php.net/fix.php?id=66350&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=66350&r=support Expected behavior: https://bugs.php.net/fix.php?id=66350&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=66350&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=66350&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=66350&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=66350&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=66350&r=dst IIS Stability: https://bugs.php.net/fix.php?id=66350&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=66350&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=66350&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=66350&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=66350&r=mysqlcfg