#33551 [NEW]: double free or corruption by 65537 elements in array

From: bertrand at toggg dot com Operating system: Linux 2.6.11-1 glibc 2.3.5-0 PHP version: 4CVS-2005-07-02 (stable) PHP Bug Type: Scripting Engine problem Bug description: double free or corruption by 65537 elements in array Description: ------------ This script simply augments an array by duplicating its first element a parameter number of time, then displays count of the array and memory usage. $ php finout.php 65536 count:65536/2968016 bytes $ php finout.php 65537 count:65537/3230200 bytes *** glibc detected *** double free or corruption (!prev): 0x0923ce30 *** Aborted When count reaches 65537 glibc issues this "post-mortem" message If instead of $arr[] = $arr[0]; I use $arr[] = 'x'; this message does not come. Reproduce code: --------------- <?php $loop = isset($_SERVER['argv'][1]) ? $_SERVER['argv'][1]+0 : 1000; error_reporting(E_ALL); $arr = array ('x') ; while (--$loop) { $arr[] = $arr[0]; } echo 'count:'.count($arr).'/'.memory_get_usage() . " bytes\n"; ?> -- Edit bug report at http://bugs.php.net/?id=33551&edit=1 -- Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=33551&r=trysnapshot4 Try a CVS snapshot (php5.0): http://bugs.php.net/fix.php?id=33551&r=trysnapshot50 Try a CVS snapshot (php5.1): http://bugs.php.net/fix.php?id=33551&r=trysnapshot51 Fixed in CVS: http://bugs.php.net/fix.php?id=33551&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=33551&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=33551&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=33551&r=needscript Try newer version: http://bugs.php.net/fix.php?id=33551&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=33551&r=support Expected behavior: http://bugs.php.net/fix.php?id=33551&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=33551&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=33551&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=33551&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=33551&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=33551&r=dst IIS Stability: http://bugs.php.net/fix.php?id=33551&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=33551&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=33551&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=33551&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=33551&r=mysqlcfg