Bug #77048 [Fbk]: opcache segfault when enabled

Edit report at https://bugs.php.net/bug.php?id=77048&edit=1 ID: 77048 Updated by: nikic@php.net Reported by: chris at policyreporter dot com Summary: opcache segfault when enabled Status: Feedback Type: Bug Package: opcache Operating System: Ubuntu 18.04 LTS PHP Version: 7.2.11 Assigned To: cmb Block user comment: N Private report: N New Comment: To rule out one particular cause, you can try setting opcache.optimization_level=0 and see if this avoids the segfaults. Previous Comments: ------------------------------------------------------------------------ [2018-10-23 09:23:41] cmb@php.net Not enough information was provided for us to be able to handle this bug. Please re-read the instructions at http://bugs.php.net/how-to-report.php We either need a reproduce script, or at least a backtrace. ------------------------------------------------------------------------ [2018-10-22 22:41:16] chris at policyreporter dot com Description: ------------ I set up a new server on Ubuntu 18.04 w/ Apache 2.4 and PHP 7.2.11. When attempting to access a Zend Framework site, I noted endless "no response received" errors. When I looked at Apache's error log, I saw a string of seg fault errors: [Mon Oct 22 20:31:13.154847 2018] [core:notice] [pid 22532] AH00051: child pid 23483 exit signal Segmentation fault (11), possible coredump in /etc/apache2 [Mon Oct 22 20:31:13.157075 2018] [core:notice] [pid 22532] AH00051: child pid 23494 exit signal Segmentation fault (11), possible coredump in /etc/apache2 [Mon Oct 22 20:31:21.168845 2018] [core:notice] [pid 22532] AH00051: child pid 23497 exit signal Segmentation fault (11), possible coredump in /etc/apache2 [Mon Oct 22 20:31:21.168980 2018] [core:notice] [pid 22532] AH00051: child pid 23498 exit signal Segmentation fault (11), possible coredump in /etc/apache2``` After much debugging and troubleshooting, I narrowed the issue down to opcache. If I comment out zend_extension=opcache.so and instead put opcache.enable=0 in /etc/php/7.2/apache2/conf.d/10-opcache.ini and restart apache2, the segfaults cease. Additionally, if opcache is enabled but the xdebug extension is also enabled, there are no segfaults. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=77048&edit=1