Segmentation fault bug in Swift language

Swiftbug

//
//  ViewController.swift
//  SwiftBug
//
//  Created by *守細美 on 9/25/14.
//  Copyright (c) 2014 iplab. All rights reserved.
//

import UIKit

class ViewController: UIViewController {

	override func viewDidLoad() {
		super.viewDidLoad()
		// Do any additional setup after loading the view, typically from a nib.
		
		let handler = completedHandler(self, "register")

	}

	override func didReceiveMemoryWarning() {
		super.didReceiveMemoryWarning()
		// Dispose of any resources that can be recreated.
	}

	typealias DLDefaultCompletionHandler = (success: Bool, message: String?) -> ()
	
	//swift compiler has a bug while returning closures in a closure
	let completedHandler: (AnyObject, String) -> (DLDefaultCompletionHandler) = { (me, title) in
		
		return
			{(success, message) -> () in
				if success{
					//proceed to main controller
					let tabView : UITabBarController = UITabBarController(nibName: nil, bundle: nil)
					let naviController: UINavigationController = UINavigationController(rootViewController:tabView)
					me.presentViewController(naviController, animated: true, completion: nil)
					
				}else{
					println("\(title) failed")
				}
		}
	}

}

크;

Solution

//
//  ViewController.swift
//  SwiftCrashTest
//
//  Created by Luavis on 9/26/14.
//  Copyright (c) 2014 Luavis. All rights reserved.
//

import UIKit

typealias DLDefaultCompletionHandler = (success: Bool, message: String?) -> ()

class ViewController: UIViewController {

    let completedHandler: (AnyObject, String) -> (DLDefaultCompletionHandler);


    required init(coder aDecoder: NSCoder)
    {
       self.completedHandler = { (me, title) in

            return
                {(success, message) -> () in
                    if success{
                        //proceed to main controller
                        let tabView : UITabBarController = UITabBarController(nibName: nil, bundle: nil)
                        let naviController: UINavigationController = UINavigationController(rootViewController:tabView)
                        me.presentViewController(naviController, animated: true, completion: nil)

                    }else{
                        println("\(title) failed")
                    }
            }
        }

        super.init(coder: aDecoder)
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        let handler = completedHandler(self, "register")
    }
}