Error when debugging on 7.1 device swift xcode6 beta 3

Question

I have a project that worked fine in beta2 but now it\'s broken with the following runtime error.

dyld: Symbol not found: __TWPVSs26AutoreleasingUnsafePointe         


        

Answer 1

cleaning DerivedData folder resolves the issue.

Answer 2

I was getting the same error and I solved it by:

1. Opening the organizer in XCode 6 Beta3 (Window -> Organizer)

2. Selecting the "Projects" tab at the top

3. Selecting my project in the left hand side column

4. Selecting the "Delete..." button next to the Derived Data location

My swift application now runs on iOS 7.1.2 on my iPhone 4

Answer 3

I had to add import Foundation to the first line of my AppDelegate.swift file (Xcode 6 Beta 3)

Answer 4

I solved this by deleting the cached files in ../DerivedData/* and ~/Library/Caches/com.apple.dt.Xcode