Apache/PHP segmentation fault in debug_backtrace() -


when performing specific action in drupal project, php crashes. in /var/log/apache2/error.log, can see:

[wed jul 08 09:51:13.068078 2015] [core:notice] [pid 9130] ah00051: child pid 9135 exit signal segmentation fault (11), possible coredump in /etc/apache2

using xdebug.auto_trace=on, i've been able determine crash occurs when debug_backtrace() called (and not every time).

i've managed core dump. here's when running sudo gdb /usr/sbin/apache2 /tmp/coredumps/core-apache2.9135:

program terminated signal sigsegv, segmentation fault.
#0 0x00007f12e1c7422a in zend_std_object_get_class_name () /usr/lib/apache2/modules/libphp5.so

what can further troubleshoot issue?


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