Currently, I am hitting the following exception when attempting to use an out-of-date XHPAST binary:
[2015-02-11 18:02:10] EXCEPTION: (RuntimeException) Use of undefined constant STDOUT - assumed 'STDOUT' at [<phutil>/src/error/PhutilErrorHandler.php:221] #0 PhutilErrorHandler::handleError(integer, string, string, integer, array) called at [<phutil>/src/console/PhutilConsoleFormatter.php:33] #1 PhutilConsoleFormatter::getDisableANSI() called at [<phutil>/src/console/PhutilConsoleFormatter.php:51] #2 PhutilConsoleFormatter::formatString(string, string, string) #3 call_user_func_array(array, array) called at [<phutil>/src/console/format.php:7] #4 phutil_console_format(string, string, string) called at [<phutil>/src/parser/xhpast/bin/PhutilXHPASTBinary.php:68] #5 PhutilXHPASTBinary::getBuildInstructions() called at [<phutil>/src/parser/xhpast/bin/PhutilXHPASTBinary.php:84] #6 PhutilXHPASTBinary::getParserFuture(string) called at [<phabricator>/src/applications/phpast/controller/PhabricatorXHPASTViewRunController.php:14] #7 PhabricatorXHPASTViewRunController::processRequest() called at [<phabricator>/src/aphront/AphrontController.php:33] #8 AphrontController::handleRequest(AphrontRequest) called at [<phabricator>/src/aphront/configuration/AphrontApplicationConfiguration.php:196] #9 AphrontApplicationConfiguration::processRequest(AphrontRequest, PhutilDeferredLog, AphrontPHPHTTPSink) called at [<phabricator>/src/aphront/configuration/AphrontApplicationConfiguration.php:121] #10 AphrontApplicationConfiguration::runHTTPRequest(AphrontPHPHTTPSink) called at [<phabricator>/webroot/index.php:19]
The simple fix is to disable ANSI output when STDOUT is undefined.