Segmentation fault (core dumped)

[x011]

Hi there,
I followed the instructions to build on Linux exactly as mentioned on the README file, but everytime I try to decode using:

php index.php encrypted.php

I get the error:

Segmentation fault (core dumped)

xcache compilation showed no errors and the patch was also applied successfully.
Here's the php -m output:

[PHP Modules]
calendar
Core
ctype
date
ereg
exif
fileinfo
filter
ftp
gettext
hash
iconv
json
libxml
mhash
openssl
pcntl
pcre
PDO
Phar
posix
readline
Reflection
session
shmop
sockets
SPL
standard
sysvmsg
sysvsem
sysvshm
tokenizer
XCache
XCache Cacher
XCache Coverager
XCache Disassembler
XCache Optimizer
Zend Guard Loader
Zend OPcache
zlib

[Zend Modules]
XCache
XCache Cacher
XCache Coverager
XCache Optimizer
Zend Guard Loader
Zend OPcache

Segmentation fault (core dumped)

I've been trying to use this project for over a week without success. Does anyone know what I'm doing wrong?