#47103 [NEW]: memory leak using foreach and references

From: soywiz at gmail dot com Operating system: General PHP version: 5.2.8 PHP Bug Type: Scripting Engine problem Bug description: memory leak using foreach and references Description: ------------ This snippet causes an out of memory. It seems that it's duplicating the value (it's trying to allocate a memory chunk as large as each element on the array) and it's not freeing it. The problem persists even with a unset($v); within the foreach. I reproduced it using php 5.2.8-cli on windows and php 5.2.5-cgi on linux. I think it should work, but maybe it's a php feature? Reproduce code: --------------- <?php $a = array_fill(0, 99999, str_repeat('*', 9991)); foreach ($a as &$v) ; ?> Expected result: ---------------- Don't waste all the memory Actual result: -------------- Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 9992 bytes) in test.php on line 3 -- Edit bug report at http://bugs.php.net/?id=47103&edit=1 -- Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=47103&r=trysnapshot52 Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=47103&r=trysnapshot53 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=47103&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=47103&r=fixedcvs Fixed in CVS and need be documented: http://bugs.php.net/fix.php?id=47103&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=47103&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=47103&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=47103&r=needscript Try newer version: http://bugs.php.net/fix.php?id=47103&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=47103&r=support Expected behavior: http://bugs.php.net/fix.php?id=47103&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=47103&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=47103&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=47103&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=47103&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=47103&r=dst IIS Stability: http://bugs.php.net/fix.php?id=47103&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=47103&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=47103&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=47103&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=47103&r=mysqlcfg