Bug #53228 [Com]: memory leak when throwing exception in custom handler in functions

Edit report at http://bugs.php.net/bug.php?id=53228&edit=1 ID: 53228 Comment by: uramihsayibok at gmail dot com Reported by: kgrecki at gmail dot com Summary: memory leak when throwing exception in custom handler in functions Status: Open Type: Bug Package: Scripting Engine problem Operating System: Linux PHP Version: 5.3.3 Block user comment: N New Comment: unset($e)ing in the catch block plugs the hole - the previous value/exception in $e isn't being destroyed? Previous Comments: ------------------------------------------------------------------------ [2010-11-02 18:48:12] kgrecki at gmail dot com Description: ------------ I encountered a similar issue to #25335 where custom error handler + exceptions leaks memory but only when try-catch block is in a function and looped through directly. I imagine there's some scope/GC issues here, and whether this is actual bug or limitation of PHP. Test script: --------------- <? set_error_handler(function($errno, $errstr, $errfile, $errline){ throw new Exception($errstr); }); function leak() { while (true) { try { // throw new Exception(); //it doesn't leak if it's thrown directly 1 / 0; //leaks } catch (Exception $e) {} echo memory_get_usage(), PHP_EOL; } } leak(); /* it doesn't leak if it's outside of the function */ while (true) { try { 1 / 0; } catch (Exception $e) { } echo memory_get_usage(), PHP_EOL; } /* it doesn't leak if try-catch block is in a separate function */ function foo() { $try = function(){ try {1 / 0;} catch (Exception $e) {} }; while (true) { $try(); echo memory_get_usage(), PHP_EOL; } } foo(); Expected result: ---------------- 637512 637512 637512 637512 637512 637512 ... Actual result: -------------- 639432 644272 649080 653896 658704 663512 668320 ... ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/bug.php?id=53228&edit=1