Bug #52497 [NEW]: Memory Leak in classes cycle reference

From: Operating system: CentsOS PHP version: 5.2.14 Package: *General Issues Bug Type: Bug Bug description:Memory Leak in classes cycle reference Description: ------------ Memory Leak in classes cycle reference Test script: --------------- class foo { protected $mBar=null; public function setBar(bar $value){ $this->mBar=$value; } public function __destruct(){ unset($this->mBar); } } class bar { protected $mFoo=null; protected $mContent=null; public function __construct() { $this->mContent=str_repeat("prova",10000); } public function setFoo(foo $value){ $this->mFoo=$value; } public function __destruct(){ unset($this->mFoo); } } ini_set("memory_limit","32M"); $cont=0; while($cont<1000){ $cont++; $tmp_foo=new Foo(); $tmp_bar= new Bar(); $tmp_foo->setBar($tmp_bar); $tmp_bar->setFoo($tmp_foo); unset($tmp_foo, $tmp_bar); } Expected result: ---------------- no mem leak Actual result: -------------- Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 50001 bytes) -- Edit bug report at http://bugs.php.net/bug.php?id=52497&edit=1 -- Try a snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=52497&r=trysnapshot52 Try a snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=52497&r=trysnapshot53 Try a snapshot (trunk): http://bugs.php.net/fix.php?id=52497&r=trysnapshottrunk Fixed in SVN: http://bugs.php.net/fix.php?id=52497&r=fixed Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=52497&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=52497&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=52497&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=52497&r=needscript Try newer version: http://bugs.php.net/fix.php?id=52497&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=52497&r=support Expected behavior: http://bugs.php.net/fix.php?id=52497&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=52497&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=52497&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=52497&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=52497&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=52497&r=dst IIS Stability: http://bugs.php.net/fix.php?id=52497&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=52497&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=52497&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=52497&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=52497&r=mysqlcfg