Bug #70626 [Opn->Fbk]: PHP segfaults or reports "zend_mm_heap corrupted" for some date functions

Edit report at https://bugs.php.net/bug.php?id=70626&edit=1 ID: 70626 Updated by: laruence@php.net Reported by: michael at michaelmarley dot com Summary: PHP segfaults or reports "zend_mm_heap corrupted" for some date functions -Status: Open +Status: Feedback Type: Bug Package: Reproducible crash Operating System: Linux x86_64 PHP Version: 7.0.0RC4 Block user comment: N Private report: N New Comment: 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. I can not reproduce this ... Previous Comments: ------------------------------------------------------------------------ [2015-10-02 22:24:23] michael at michaelmarley dot com Description: ------------ Starting with PHP 7.0.0 RC4, I get "zend_mm_heap corrupted" errors or segfaults when executing some date functions. I included a simple example that causes the problem. The problem occurs both for CLI and FPM modes. In FPM mode, it always causes a segfault. In CLI mode, it usually prints "zend_mm_heap corrupted", but segfaults sometimes. I tried to capture a backtrace by running it in CLI in GDB, but it never seems to segfault while running in GDB; it always displays the corruption message instead. The message or segfault always occurs at the end of the script, so even if I put more code below the line that triggers the crash, that code will execute successfully. It always crashes at the end of the script though. I am using the packages from here: https://launchpad.net/~mamarley/+archive/ubuntu/php-exp. If it matters, they were compiled with GCC 5.2. I have no third-party extensions enabled (only opcache, gd, pgsql, and pdo_pgsql). I have also tried with all the extensions disabled and still gotten the same problem. I am sorry for the lack of debugging information here, but I am at a loss about how to collect anything useful. If you let me know what I should do, I would be glad to do it though. Test script: --------------- <?php $date=date_create(date("Y-m-d")); print_r($date); ?> Expected result: ---------------- DateTime Object ( [date] => 2015-10-02 00:00:00.000000 [timezone_type] => 3 [timezone] => America/New_York ) Actual result: -------------- DateTime Object ( [date] => 2015-10-02 00:00:00.000000 [timezone_type] => 3 [timezone] => America/New_York ) zend_mm_heap corrupted or DateTime Object ( [date] => 2015-10-02 00:00:00.000000 [timezone_type] => 3 [timezone] => America/New_York ) Segmentation fault ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=70626&edit=1