[SOLVED] _BSMachError while running Stanford's CS193p Smashtag app

_BSMachError while running Stanford's CS193p Smashtag app

I downloaded the Smasthag demo app from course's site. Project builds fine (after small changes in Twitter, TwitterRequest etc. classes, because I use the latest Xcode 7b4) and works fine on simulator (I also had to add NSAppTransportSecurity key to info.plist), but not on a device - it doesn't fetch tweets . I tested it on both iPhone 6 with iOS 9 Public Beta and iPad 2 with iOS 8.4. Moreover, when app is running in the simulator and I change hashtag to search, whole tableView reloads with new tweets, but in the console I get this:

2015-07-23 03:24:15.560 Smashtag[25991:4344251] _BSMachError: (os/kern) invalid capability (20)
2015-07-23 03:24:15.560 Smashtag[25991:4344251] _BSMachError: (os/kern) invalid name (15)

App still runs fine, but this error bugs me. I couldn't fine anything about this _BSMachError in google (just one lonely Indonesian tweet). I can't also get why app doesn't fetch tweets on a device.

Solution

To fix this issue you should set locale to en_US.

Change the private extension asTwitterDate in Tweet.swift to the following to fix issue on non en_US devices.

...
private extension String {
  var asTwitterDate: NSDate? {
    get {
        let dateFormatter = NSDateFormatter()
        dateFormatter.dateFormat = "EEE MMM dd HH:mm:ss Z yyyy"
        dateFormatter.locale = NSLocale(localeIdentifier: "en_US")
        let createdAt = dateFormatter.dateFromString(self)
        return createdAt
    }
  }
}

After this your application should load and show all data correctly.