Invalid opcode

[Jason P.]

Trying to do a fresh install of IPB 4.0 on a test site and am running into an issue on the install. The install page doesn't load and digging into the php error logs, I find this every time I attempt to load the page:

 

PHP Fatal error:  Invalid opcode 153/1/8. in /srv/joinsg/test/htdocs/system/Http/Url.php on line 1108

Checking the 4.0 requirements script, it looks like everything checks out: (Currently running centos)
http://i.imgur.com/0jfWMnn.png

It seems to be a caching issue, but I'm not sure where to begin. In terms of eAccelerator, here is the versions:

Zend Engine v2.3.0, Copyright (c) 1998-2013 Zend Technologies
with the ionCube PHP Loader v4.7.4, Copyright (c) 2002-2014, by ionCube Ltd., and
with eAccelerator v1.0-dev, Copyright (c) 2004-2012 eAccelerator, by eAccelerator

[Jason P.]

Update: Fixed it for now by disabling eaccelerator in php.ini:

eaccelerator.enable 0
eaccelerator.optimizer 0