Bug #73960 [NEW]: Leak with instance method calling static method with referenced return

From: highmind63 at gmail dot com Operating system: Windows 10 and Ubuntu 14.04 PHP version: 7.0.15 Package: Class/Object related Bug Type: Bug Bug description:Leak with instance method calling static method with referenced return Description: ------------ Memory leaks with referenced variable return in static method called by instance method. Test script: --------------- <pre> <?php class Leak { static protected function &leaked(array &$array = null) { $array = array('one'); return $array; } public function toLeaked($array = null) { $array = static::leaked($array); return $array; } public function testLeak() { echo "memory before loop: " . memory_get_usage(true) . PHP_EOL; for ($i = 0; $i < 5000; $i++) { $leak = $this->toLeaked(); } echo "memory after loop: " . memory_get_usage(true) . PHP_EOL; } } $leak = new Leak(); $leak->testLeak(); ?> </pre> Expected result: ---------------- No Leak Actual result: -------------- Leaks Memory: memory before loop: 2097152 memory after loop: 4194304 -- Edit bug report at https://bugs.php.net/bug.php?id=73960&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=73960&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=73960&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=73960&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=73960&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=73960&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=73960&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=73960&r=needscript Try newer version: https://bugs.php.net/fix.php?id=73960&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=73960&r=support Expected behavior: https://bugs.php.net/fix.php?id=73960&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=73960&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=73960&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=73960&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=73960&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=73960&r=dst IIS Stability: https://bugs.php.net/fix.php?id=73960&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=73960&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=73960&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=73960&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=73960&r=mysqlcfg