Comment 2 for bug 1425165

StacktraceTop:
 zend_accel_info (zend_module=0x79b2a5ba45d04775) at /build/buildd/php5-5.5.9+dfsg/ext/opcache/zend_accelerator_module.c:448
 ?? ()
 ?? ()
 _hooks ()
 php_module_shutdown () at /build/buildd/php5-5.5.9+dfsg/main/main.c:2384