I was trying to do a `./bin/i18n extract` from phabricator directory, in order to start a french traduction.
It struggled on a xhpast syntax error :
```
[...]
<<< [67] <exec> 58,560 us
>>> [69] <exec> $ '/var/www/phabricator/libphutil/src/parser/xhpast/bin/xhpast'
<<< [68] <exec> 395,709 us
>>> [70] <exec> $ '/var/www/phabricator/libphutil/src/parser/xhpast/bin/xhpast'
<<< [69] <exec> 354,959 us
>>> [71] <exec> $ '/var/www/phabricator/libphutil/src/parser/xhpast/bin/xhpast'
<<< [70] <exec> 12,987 us
>>> [72] <exec> $ '/var/www/phabricator/libphutil/src/parser/xhpast/bin/xhpast'
<<< [71] <exec> 11,476 us
>>> [73] <exec> $ '/var/www/phabricator/libphutil/src/parser/xhpast/bin/xhpast'
<<< [72] <exec> 11,853 us
>>> [74] <exec> $ '/var/www/phabricator/libphutil/src/parser/xhpast/bin/xhpast'
<<< [73] <exec> 10,839 us
>>> [75] <exec> $ '/var/www/phabricator/libphutil/src/parser/xhpast/bin/xhpast'
<<< [74] <exec> 55,447 us
>>> [76] <exec> $ '/var/www/phabricator/libphutil/src/parser/xhpast/bin/xhpast'
<<< [75] <exec> 57,626 us
>>> [77] <exec> $ '/var/www/phabricator/libphutil/src/parser/xhpast/bin/xhpast'
<<< [76] <exec> 12,482 us
>>> [78] <exec> $ '/var/www/phabricator/libphutil/src/parser/xhpast/bin/xhpast'
<<< [77] <exec> 8,975 us
>>> [79] <exec> $ '/var/www/phabricator/libphutil/src/parser/xhpast/bin/xhpast'
<<< [78] <exec> 9,291 us
<<< [79] <exec> 6,258 us
[2015-10-27 13:34:19] EXCEPTION: (XHPASTSyntaxErrorException) XHPAST Parse Error: syntax error, unexpected T_STRING on line 357 at [<phutil>/src/parser/xhpast/api/XHPASTTree.php:55]
arcanist(head=master, ref.master=3308da5f8fbe), phabricator(head=master, ref.master=cea633f698da), phutil(head=master, ref.master=d5b4421792e5)
#0 XHPASTTree::newFromDataAndResolvedExecFuture(string, array) called at [<phabricator>/src/infrastructure/internationalization/management/PhabricatorInternationalizationManagementExtractWorkflow.php:54]
#1 PhabricatorInternationalizationManagementExtractWorkflow::execute(PhutilArgumentParser) called at [<phutil>/src/parser/argument/PhutilArgumentParser.php:406]
#2 PhutilArgumentParser::parseWorkflowsFull(array) called at [<phutil>/src/parser/argument/PhutilArgumentParser.php:301]
#3 PhutilArgumentParser::parseWorkflows(array) called at [<phabricator>/scripts/setup/manage_i18n.php:21]
```