Special character cause app crash

My IOS application using cordova location plugin cordova-plugin-geolocation(https://github.com/apache/cordova-plugin-geolocation). If disabled WIFI and device in build cause app can not get any location data then locationManger reports 'The operation couldn’t be completed. (kCLErrorDomain error 0.)', the location plugin call cordova method [self.commandDelegate sendPluginResult:result callbackId:callbackId]; returns the error message. then app get crashed with "libc++abi.dylib: terminating with uncaught exception of type std::logic_error: basic_string::_S_construct NULL not valid" in console, there is not stack trace. So seems cordova framework current can not handling special character ' couldn’t ' .