This is a follow up to my previous phabricator question
On running arc liberate in phabricator I'm running into the following error
arcanist/bin/arc liberate phabricator/
[2015-07-23 22:34:05] EXCEPTION: (Exception) xhpast is broken. at [/src/parser/xhpast/bin/PhutilXHPASTBinary.php:47]
phutil()
#0 PhutilXHPASTBinary::build() called at [/src/moduleutils/PhutilLibraryMapBuilder.php:446]
#1 PhutilLibraryMapBuilder::analyzeLibrary() called at [/src/moduleutils/PhutilLibraryMapBuilder.php:77]
#2 PhutilLibraryMapBuilder::buildMap() called at [/src/moduleutils/PhutilLibraryMapBuilder.php:109]
#3 PhutilLibraryMapBuilder::buildAndWriteMap() called at [/scripts/phutil_rebuild_map.php:75] `
I looked online and could not find guidance to my specific problem. Any help would be appreciated, thanks in advance!