private function fail($js, $errorMessage) { Minify0_Minify::$recoverableError = $errorMessage; $response = "/* " . $errorMessage . "\n(Using fallback minifier)\n*/\n"; if (is_callable($this->_fallbackFunc)) { $response .= call_user_func($this->_fallbackFunc, $js); } else { $response .= $js; } return $response; }