#42158 [NEW]: SimpleXMLElement as parameter for preg_match leads to memory leak

From: chabrol at vfnm dot de Operating system: Linux PHP version: 5CVS-2007-07-31 (snap) PHP Bug Type: PCRE related Bug description: SimpleXMLElement as parameter for preg_match leads to memory leak Description: ------------ If you use a SimpleXMLElement as parameter for preg_match or preg_match_all, memory is lost. P.S.: If you cast the parameter explicit with (string)$xml->name memory usage doesn't increase. So i suppose it's an problem related to internal casting. Reproduce code: --------------- <?php $xml = simplexml_load_string("<root><name>foo</name></root>"); for ($i=1; $i<=20; $i++) { preg_match("/bar/", $xml->name); // or preg_match_all("/bar/", $xml->name, $matches); echo "Memory usage after $i iterations: " . memory_get_usage() . "\n"; } ?> Expected result: ---------------- I would expect an more or less equal memory usage. Actual result: -------------- Memory usage is constantly increasing until hitting configured memory limit -- Edit bug report at http://bugs.php.net/?id=42158&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=42158&r=trysnapshot44 Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=42158&r=trysnapshot52 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=42158&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=42158&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=42158&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=42158&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=42158&r=needscript Try newer version: http://bugs.php.net/fix.php?id=42158&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=42158&r=support Expected behavior: http://bugs.php.net/fix.php?id=42158&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=42158&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=42158&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=42158&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=42158&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=42158&r=dst IIS Stability: http://bugs.php.net/fix.php?id=42158&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=42158&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=42158&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=42158&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=42158&r=mysqlcfg