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

ID: 47103 Updated by: jani@php.net Reported By: soywiz at gmail dot com Status: Verified Bug Type: Scripting Engine problem Operating System: * PHP Version: 5.*CVS,6CVS (2009-01-15) New Comment: This worked: # php -dmemory_limit=1000M t.php int(1018887988) That number is from memory_get_usage() after the foreach.. :) Previous Comments: ------------------------------------------------------------------------ [2009-01-15 14:51:25] jani@php.net This is NOT expected but might not be fixable. And foreach with reference is supposed to work without leaks. ------------------------------------------------------------------------ [2009-01-14 17:35:42] crrodriguez at opensuse dot org looks like expected, do not use foreach value by reference, it is know to have "apparently unexpected behaviors" that are normal. ------------------------------------------------------------------------ [2009-01-14 16:35:07] soywiz at gmail dot com 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 this bug report at http://bugs.php.net/?id=47103&edit=1