#39652 [NEW]: memory_get_usage() Bug

From: chris at dented-planet dot net Operating system: Mac OS X 10.4.8 PHP version: 5.2.0 PHP Bug Type: Unknown/Other Function Bug description: memory_get_usage() Bug Description: ------------ I don't know if it's utf8_encode() or memory_get_usage() in the following script that might be causing the issue. But rather quickly in the loop, memory_get_usage() begins to report a steadily decreasing amount of memory used until it drops into negative values. A graph of usage is at: http://dented-planet.net/graph.png 'memory_limit' is set to 100MB in php.ini. I know this isn't the best possible bug report, but I'm not sure how else to report it. Reproduce code: --------------- <?php $x = ''; for ($i = 1; $i <= 20000; $i++) { $x = utf8_encode('this is a test'); if ($i % 100 === 0) { echo $i . ' ' . memory_get_usage() . ' ' . memory_get_usage(true) . "\n"; } } ?> -- Edit bug report at http://bugs.php.net/?id=39652&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=39652&r=trysnapshot44 Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=39652&r=trysnapshot52 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=39652&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=39652&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=39652&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=39652&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=39652&r=needscript Try newer version: http://bugs.php.net/fix.php?id=39652&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=39652&r=support Expected behavior: http://bugs.php.net/fix.php?id=39652&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=39652&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=39652&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=39652&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=39652&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=39652&r=dst IIS Stability: http://bugs.php.net/fix.php?id=39652&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=39652&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=39652&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=39652&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=39652&r=mysqlcfg