Description:
------------
I use php-fpm + opcache.
My configuration is following:
 opcache.enable=1
 opcache.revalidate_freq=2
 opcache.validate_timestamps=1
 opcache.log_verbosity_level=4

When accessing test script twice, memory leaks detected.
I think this bug occurs when updating cache.

This leaks occurs on PHP 5.5(Git-2015-05-08), PHP 5.6(Git-2015-05-08).
But it does not occur on PHP 7.0(Git-2015-05-08)

Test script:
---------------
<?php
touch(__FILE__);
sleep(3);

Expected result:
----------------
Memory does not leak.

vagrant@php7dev:/var/www/default$ sudo tailf /var/log/nginx/php-fpm_error.log
[08-May-2015 01:03:13] NOTICE: fpm is running, pid 25975
[08-May-2015 01:03:13] NOTICE: ready to handle connections
[08-May-2015 01:03:17] WARNING: [pool www] child 25978 said into stderr: "Fri May  8 01:03:17 2015 (25978): Message Cached script '/var/www/default/test/opcache_touch_self.php'"
[08-May-2015 01:03:22] WARNING: [pool www] child 25976 said into stderr: "Fri May  8 01:03:22 2015 (25976): Message Cached script '/var/www/default/test/opcache_touch_self.php'"

Actual result:
--------------
Memory leaks.

vagrant@php7dev:/var/www/default$ sudo tailf /var/log/nginx/php-fpm_error.log
[08-May-2015 01:03:13] NOTICE: fpm is running, pid 25975
[08-May-2015 01:03:13] NOTICE: ready to handle connections
[08-May-2015 01:03:17] WARNING: [pool www] child 25978 said into stderr: "Fri May  8 01:03:17 2015 (25978): Message Cached script '/var/www/default/test/opcache_touch_self.php'"
[08-May-2015 01:03:22] WARNING: [pool www] child 25976 said into stderr: "Fri May  8 01:03:22 2015 (25976): Message Cached script '/var/www/default/test/opcache_touch_self.php'"
[08-May-2015 01:03:25] WARNING: [pool www] child 25976 said into stderr: "[Fri May  8 01:03:25 2015]  Script:  '-'"
[08-May-2015 01:03:25] WARNING: [pool www] child 25976 said into stderr: "/home/vagrant/php-src/ext/opcache/ZendAccelerator.c(1931) :  Freeing 0x7F62A4877CF0 (45 bytes), script=-"
[08-May-2015 01:03:25] WARNING: [pool www] child 25976 said into stderr: "=== Total 1 memory leaks detected ==="