TheSaurus TheSaurus - 7 months ago 204
Swift Question

Xcode: EXC_BREAKPOINT (EXC_ARM_BREAKPOINT, subcode=0xe7ffdefe)

I'm getting an EXC_BREAKPOINT (EXC_ARM_BREAKPOINT, subcode=0xe7ffdefe) error while running my app on a iOS7 device.
The thing is, it runs smoothly on iOS7 simulator.

By using breakpoints, I've found the error occurs in line 6.

required init(coder aDecoder: NSCoder) {
personPicker = ABPeoplePickerNavigationController()
super.init(coder: aDecoder)
personPicker.peoplePickerDelegate = self
}
/*error line*/ @IBAction func BPressed(sender: AnyObject) {
self.presentViewController(personPicker, animated: true, completion: nil)
}


This error is new, and didn't appeared on my device until I've added these lines into the code;

let url = NSURL(string: urlPath)
let request = NSURLRequest(URL: url!)
NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue.mainQueue()) {(response, data, error) in
println(NSString(data: data, encoding: NSUTF8StringEncoding))
}


Also; the debugger points the error to this line:

0x16a7f0: trap


And gives this output in the console:


fatal error: attempt to create an Unmanaged instance from a null pointer


This error causes a black screen on device even though I've changed nothing in storyboard.

Thank you for taking your time.

Edit: This error showed no result in search engines, but I think it may be related to obj-c.

dlw dlw
Answer

I ran across this issue today when testing some Swift code against an old iPad 2 (I think it's an iPad 2 -- it's model MD368LL/A), running iOS 8.1.3. It turned out that the problem existed everywhere that I was calling something like:

Int(arc4random() % <someInt>)

This worked fine on later iPads, iPhone5S, iPhone6, etc. Fixed by changing code to:

Int(UInt32(arc4random()) % UInt32(<someInt>))

I think it was a register overflow on the older hardware.