Open Radar

 
Hello.

I don't know why, but when I create a project with certain Swift code, Xcode starts indexing and it never stops. Meanwhile, memory usage grows without control.

Attached, the source code that seems to be triggering the problem and a complete sample project.

Thank you for your time.

Steps to Reproduce:
1. Create a new Single View Application project.
2. Select Swift as language.
3. Mark "Use Core Data", "Include Unit Tests" and "Include UI Tests".
4. Add a new Swift file to the project.
5. The code of this new file is in the file DataHelper.swift (attached).
6. Press Cmd + B to build the project.

Expected Results:
- Xcode should be able to build the project.

Actual Results:
- Xcode will start building but it won't be able to do it.
- The amount of memory used by Xcode will grow without control.
- Next time you load the project it will start indexing and, again, Xcode will grow without control.

DataHelper.swift:

import Foundation
import CoreData

class DataHelper {
  let context: NSManagedObjectContext

  init(context: NSManagedObjectContext) {
    self.context = context
  }

  func seedDataStore() {
    seedArtists()
  }

  func seedArtists() {
    let artists = [
      (fullName: "Ignasi Aballí"),
      (fullName: "Franz Ackermann"),
      (fullName: "Pep Agut"),
      (fullName: "Eija-Liisa Ahtila"),
      (fullName: "Doug Aitken"),
      (fullName: "Alfonso Albacete"),
      (fullName: "Josef Albers"),
      (fullName: "Carlos Alcolea"),
      (fullName: "Helena Almeida"),
      (fullName: "Augusto Alves da Silva"),
      (fullName: "Francis Alÿs"),
      (fullName: "Karel Appel"),
      (fullName: "Nobuyoshi Araki"),
      (fullName: "Vasco Araújo"),
      (fullName: "Richard Artschwager"),
      (fullName: "Elena Asins"),
      (fullName: "David Austen"),
      (fullName: "Shoja Azari"),
      (fullName: "Francis Bacon"),
      (fullName: "John Baldessari")
    ]

    for artist in artists {
      let newArtist = NSEntityDescription.insertNewObjectForEntityForName("Artista", inManagedObjectContext: context) as! Artist
      newArtist.fullName = artist.fullName
    }

    do {
      try context.save()
    } catch let error as NSError {
      print("Error: \(error.localizedDescription)")
    }
  }
}