Bug #52565 [Fbk->Opn]: print out of Zend_Form causing segmentation fault

Edit report at http://bugs.php.net/bug.php?id=52565&edit=1 ID: 52565 User updated by: martin dot minka at gmail dot com Reported by: martin dot minka at gmail dot com Summary: print out of Zend_Form causing segmentation fault -Status: Feedback +Status: Open Type: Bug Package: Reproducible crash Operating System: Linux PHP Version: 5.3.3 Block user comment: N New Comment: Thank you for quick reactions. I compiled PHP with debug enabled and produced backtrace. It is attached in patch section. Reproduce script is included in the original text. That exact script crashes for me everytime. Previous Comments: ------------------------------------------------------------------------ [2010-08-09 09:41:57] mike@php.net IIRC there's a place in (older version of?) the ZF Form libs where __toString() does not return a string, causing a unexpected SIGSEGV. ------------------------------------------------------------------------ [2010-08-09 09:29:28] pajoye@php.net Thank you for this bug report. To properly diagnose the problem, we need a backtrace to see what is happening behind the scenes. To find out how to generate a backtrace, please read http://bugs.php.net/bugs-generating-backtrace.php for *NIX and http://bugs.php.net/bugs-generating-backtrace-win32.php for Win32 Once you have generated a backtrace, please submit it to this bug report and change the status back to "Open". Thank you for helping us make PHP better. We also need a small reproduce script. ------------------------------------------------------------------------ [2010-08-09 00:30:49] rasmus@php.net And the backtrace? ------------------------------------------------------------------------ [2010-08-09 00:25:49] martin dot minka at gmail dot com Description: ------------ Our real application is crashing with signal 11. I was able to simplify the code to following test code which is far from our real application, but causes crash in the same kind of code construction: echo is_null($form) ? '': $form; I am able to reproduce this crash with PHP 5.3.3 and PHP 5.2.14. It does not crash when runnig in CLI mode. How to run: 1. configure include path to contain Zend library (I was testing with http://framework.zend.com/svn/framework/standard/tags/release-1.10.6/library/Zend) 2. restart apache 3. point your browser to bug.php Test script: --------------- set_include_path('.' . PATH_SEPARATOR . '/var/www/library'); require 'Zend/Form.php'; class TestClass { function crash() { $form = new Zend_Form(); echo is_null($form) ? '': $form; // it works if there echo instead of die() here die("this ends with signal 11 SIGSEGV, returns HTTP code 500"); } } $test = new TestClass(); $test->crash(); Expected result: ---------------- the program should die and print out message "this ends with signal 11 SIGSEGV, returns HTTP code 500" Actual result: -------------- HTTP response code 500 returned and signal 11 SIGSEGV logged ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/bug.php?id=52565&edit=1