Open Radar

 
Summary:
NSUserNotificationCenter.default is declared as a non-null property but returns null. Furthermore Swift seems happy with it and doesn’t throw any errors.


Steps to Reproduce:
Run this swift script (attached)

——————————
#!/usr/bin/swift

import Foundation 

let notification = NSUserNotification()
notification.title = "Wow"
let center = NSUserNotificationCenter.default
center.deliver(notification)
———————

Expected Results:
I would expect NSUserNotificationCenter.default to throw an exception because I would argue that it is programmer error to be trying to get a UserNotificationCenter for a script/app/whatever that doesn’t have a bundle ID. (It appears that having a bundle ID is a prerequisite to being able to send notifications).

The fact that it returns null breaks the nullability contract on NSUserNotificationCenter.default.

Furthermore I would expect the swift side of things to error when I attempted to use the returned “center”.

Actual Results:
Center gets returned NULL.
center.deliver does not crash and there is no indication that anything failed.

Version:
10.13

Notes:
GOOGLER:dmaclach