Bug #55228 [NEW]: Objects cannot be collected if they extends some spl classes

From: Operating system: Mac OS X PHP version: 5.3.6 Package: SPL related Bug Type: Bug Bug description:Objects cannot be collected if they extends some spl classes Description: ------------ If objects' classes extends ArrayIterator/ArrayObject, and recursively refer to each other, they will not be garbage collected. I tried reproduction code in https://bugs.php.net/bug.php?id=33595, modified A to extend ArrayIterator, B to extend ArrayObject. And is there a way to work around it currently? Test script: --------------- <?php class A extends ArrayIterator { function __construct () { $this->b = new B($this); } } class B extends ArrayObject { function __construct ($parent = NULL) { $this->parent = $parent; } } for ($i = 0 ; $i < 1000000 ; $i++) { $a = new A(); printf("gc: %d, %f\n", gc_collect_cycles(), memory_get_usage()/1024/1024); } -- Edit bug report at https://bugs.php.net/bug.php?id=55228&edit=1 -- Try a snapshot (PHP 5.2): https://bugs.php.net/fix.php?id=55228&r=trysnapshot52 Try a snapshot (PHP 5.3): https://bugs.php.net/fix.php?id=55228&r=trysnapshot53 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=55228&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=55228&r=fixed Fixed in SVN and need be documented: https://bugs.php.net/fix.php?id=55228&r=needdocs Fixed in release: https://bugs.php.net/fix.php?id=55228&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=55228&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=55228&r=needscript Try newer version: https://bugs.php.net/fix.php?id=55228&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=55228&r=support Expected behavior: https://bugs.php.net/fix.php?id=55228&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=55228&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=55228&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=55228&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=55228&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=55228&r=dst IIS Stability: https://bugs.php.net/fix.php?id=55228&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=55228&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=55228&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=55228&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=55228&r=mysqlcfg Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=55228&r=trysnapshot54